pandalib-reflect Refactor + javadoc
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BBC0FE3ABC30B893
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@ -47,13 +47,18 @@
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<exclude>META-INF/*.SF</exclude>
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<exclude>META-INF/*.DSA</exclude>
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<exclude>META-INF/*.RSA</exclude>
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<exclude>META-INF/MANIFEST.MF</exclude>
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</excludes>
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</filter>
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</filters>
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<relocations>
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<relocation>
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<pattern>io.github.classgraph</pattern>
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<shadedPattern>fr.pandacube.shaded.classgraph</shadedPattern>
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<shadedPattern>fr.pandacube.lib.reflect.shaded.classgraph</shadedPattern>
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</relocation>
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<relocation>
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<pattern>nonapi.io.github.classgraph</pattern>
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<shadedPattern>fr.pandacube.lib.reflect.shaded.classgraph.nonapi</shadedPattern>
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</relocation>
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</relocations>
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</configuration>
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@ -0,0 +1,20 @@
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package fr.pandacube.lib.reflect;
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import java.util.Arrays;
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/* package */ record ConstructorIdentifier(Class<?>[] parameters) {
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ConstructorIdentifier {
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parameters = (parameters == null) ? new Class<?>[0] : parameters;
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}
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@Override
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public boolean equals(Object other) {
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return other instanceof ConstructorIdentifier o
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&& Arrays.equals(o.parameters, parameters);
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}
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@Override
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public int hashCode() {
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return Arrays.hashCode(parameters);
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}
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}
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@ -0,0 +1,23 @@
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package fr.pandacube.lib.reflect;
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import java.util.Arrays;
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import java.util.Objects;
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/* package */ record MethodIdentifier(String methodName, Class<?>[] parameters) {
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MethodIdentifier {
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Objects.requireNonNull(methodName);
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parameters = (parameters == null) ? new Class<?>[0] : parameters;
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}
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@Override
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public boolean equals(Object other) {
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return other instanceof MethodIdentifier o
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&& o.methodName.equals(methodName)
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&& Arrays.equals(o.parameters, parameters);
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}
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@Override
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public int hashCode() {
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return methodName.hashCode() ^ Arrays.hashCode(parameters);
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}
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}
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@ -1,465 +1,51 @@
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package fr.pandacube.lib.reflect;
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import java.lang.reflect.Constructor;
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import java.lang.reflect.Field;
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import java.lang.reflect.Method;
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import java.lang.reflect.Modifier;
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import java.util.Arrays;
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import java.util.Collections;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.Objects;
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import java.util.concurrent.atomic.AtomicReference;
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import io.github.classgraph.ClassGraph;
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import io.github.classgraph.ClassGraphException;
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import io.github.classgraph.ClassInfoList;
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import io.github.classgraph.ScanResult;
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import sun.misc.Unsafe;
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/**
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* Provides methods to get instances of {@link ReflectClass}.
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*/
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public class Reflect {
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private static final Unsafe sunMiscUnsafeInstance;
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static {
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classCache = Collections.synchronizedMap(new HashMap<>());
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try {
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sunMiscUnsafeInstance = (Unsafe) ofClass(Unsafe.class).field("theUnsafe")
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.getStaticValue();
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} catch (Exception e) {
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throw new RuntimeException("Cannot access to " + Unsafe.class + ".theUnsafe value.", e);
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}
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}
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private static final Map<Class<?>, ReflectClass<?>> classCache;
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private static final Map<Class<?>, ReflectClass<?>> classCache = Collections.synchronizedMap(new HashMap<>());
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/**
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* Wraps the provided class into a {@link ReflectClass}.
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* @param clazz the class to wrap.
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* @param <T> the type of the class.
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* @return a {@link ReflectClass} wrapping the provided class.
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*/
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@SuppressWarnings("unchecked")
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public static <T> ReflectClass<T> ofClass(Class<T> clazz) {
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return (ReflectClass<T>) classCache.computeIfAbsent(clazz, ReflectClass::new);
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}
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/**
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* Wraps the provided class into a {@link ReflectClass}.
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* @param className the name of the class, passed into {@link Class#forName(String)} before using
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* {@link #ofClass(Class)}.
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* @return a {@link ReflectClass} wrapping the provided class.
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* @throws ClassNotFoundException if the provided class was not found.
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*/
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public static ReflectClass<?> ofClass(String className) throws ClassNotFoundException {
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return ofClass(Class.forName(className));
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}
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/**
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* Wraps the class of the provided object into a {@link ReflectClass}.
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* @param instance the object wrom which to get the class using {@link Object#getClass()}.
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* @return a {@link ReflectClass} wrapping the provided object’s class.
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* @throws IllegalArgumentException if {@code instance} is null.
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*/
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public static ReflectClass<?> ofClassOfInstance(Object instance) {
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if (instance == null)
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throw new IllegalArgumentException("instance can't be null");
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return ofClass(instance.getClass());
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}
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private record MethodIdentifier(String methodName, Class<?>[] parameters) {
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private MethodIdentifier {
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Objects.requireNonNull(methodName);
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parameters = (parameters == null) ? new Class<?>[0] : parameters;
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}
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@Override
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public boolean equals(Object other) {
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return other instanceof MethodIdentifier o
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&& o.methodName.equals(methodName)
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&& Arrays.equals(o.parameters, parameters);
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}
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@Override
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public int hashCode() {
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return methodName.hashCode() ^ Arrays.hashCode(parameters);
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}
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}
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private record ConstructorIdentifier(Class<?>[] parameters) {
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private ConstructorIdentifier {
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parameters = (parameters == null) ? new Class<?>[0] : parameters;
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}
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@Override
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public boolean equals(Object other) {
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return other instanceof ConstructorIdentifier o
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&& Arrays.equals(o.parameters, parameters);
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}
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@Override
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public int hashCode() {
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return Arrays.hashCode(parameters);
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}
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}
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public static class ReflectClass<T> {
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private final Class<T> clazz;
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private final Map<MethodIdentifier, ReflectMethod<T>> methodCache = Collections.synchronizedMap(new HashMap<>());
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private final Map<ConstructorIdentifier, ReflectConstructor<T>> constructorCache = Collections.synchronizedMap(new HashMap<>());
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private final Map<String, ReflectField<T>> fieldCache = Collections.synchronizedMap(new HashMap<>());
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private ReflectClass(Class<T> clazz) {
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this.clazz = clazz;
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}
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/**
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* Returns the class wrapped by this ReflectClass instance.
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*/
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public Class<T> get() {
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return clazz;
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}
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private ReflectMethod<T> method(MethodIdentifier key, boolean bypassFilter) throws NoSuchMethodException {
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ReflectMethod<T> method = methodCache.get(key);
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if (method == null) {
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method = new ReflectMethod<>(this, key, bypassFilter);
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methodCache.put(key, method);
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}
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return method;
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}
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public ReflectMethod<T> method(String name, Class<?>... paramTypes) throws NoSuchMethodException {
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return method(new MethodIdentifier(name, paramTypes), false);
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}
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public ReflectMethod<T> filteredMethod(String name, Class<?>... paramTypes) throws NoSuchMethodException {
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return method(new MethodIdentifier(name, paramTypes), true);
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}
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private ReflectConstructor<T> constructor(ConstructorIdentifier key, boolean bypassFilter) throws NoSuchMethodException {
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ReflectConstructor<T> constructor = constructorCache.get(key);
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if (constructor == null) {
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constructor = new ReflectConstructor<>(this, key, bypassFilter);
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constructorCache.put(key, constructor);
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}
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return constructor;
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}
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public ReflectConstructor<T> constructor(Class<?>... paramTypes) throws NoSuchMethodException {
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return constructor(new ConstructorIdentifier(paramTypes), false);
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}
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public ReflectConstructor<T> filteredConstructor(Class<?>... paramTypes) throws NoSuchMethodException {
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return constructor(new ConstructorIdentifier(paramTypes), true);
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}
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private ReflectField<T> field0(String name, boolean bypassFilter) throws NoSuchFieldException {
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ReflectField<T> constructor = fieldCache.get(name);
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if (constructor == null) {
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constructor = new ReflectField<>(this, name, bypassFilter);
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fieldCache.put(name, constructor);
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}
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return constructor;
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}
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public ReflectField<T> field(String name) throws NoSuchFieldException {
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return field0(name, false);
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}
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public ReflectField<T> filteredField(String name) throws NoSuchFieldException {
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return field0(name, true);
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}
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private final AtomicReference<List<Class<?>>> cachedSubclasses = new AtomicReference<>();
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/**
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* Get all subclasses of the current class, using the ClassGraph library.
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* <p>
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* If the returned list is not yet cached, or {@code forceUpdateCache} is true, then the cache is updated before
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* being returned. This may take some time.
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* <p>
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* The ClassGraph library scan all class files in the class path, then loads those which will be returned by
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* this method.
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*
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* @param forceUpdateCache to force the update of the cache, even if it already filled.
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* @return the list of all subclasses found in all loaded class loader.
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* @throws ClassGraphException if any of the worker threads throws an uncaught exception, or the scan was interrupted. (see {@link ClassGraph#scan})
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* @throws IllegalArgumentException f an exception or error was thrown while trying to load any of the classes. (see {@link ClassInfoList#loadClasses()})
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*/
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public List<Class<? extends T>> getAllSubclasses(boolean forceUpdateCache) {
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synchronized (cachedSubclasses) {
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if (forceUpdateCache || cachedSubclasses.get() == null) {
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try (ScanResult scanResult = new ClassGraph().enableClassInfo().ignoreClassVisibility().scan()) {
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cachedSubclasses.set(scanResult.getSubclasses(clazz).loadClasses());
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}
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}
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@SuppressWarnings("unchecked")
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List<Class<? extends T>> ret = (List<Class<? extends T>>) (List<?>) cachedSubclasses.get();
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return ret;
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}
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}
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}
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public static abstract class ReflectMember<T, ID, EL, EX extends ReflectiveOperationException> {
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protected final ReflectClass<T> reflectClass;
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protected final ID identifier;
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protected final EL cached;
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protected ReflectMember(ReflectClass<T> c, ID id, boolean bypassFilter) throws EX {
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reflectClass = c;
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identifier = id;
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cached = (bypassFilter) ? fetchFiltered() : fetch();
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}
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protected EL fetch() throws EX {
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// get element in current class
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try {
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EL el = fetchFromClass(reflectClass.clazz);
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setAccessible(el);
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return el;
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} catch (ReflectiveOperationException e1) {
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@SuppressWarnings("unchecked")
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EX ex = (EX) e1;
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// get parent class
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Class<? super T> superClass = reflectClass.clazz.getSuperclass();
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if (superClass == null)
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throw ex;
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// get element in parent class (will do recursion)
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try {
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EL el = fetchFromReflectClass(ofClass(superClass));
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setAccessible(el);
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return el;
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} catch (ReflectiveOperationException e2) {
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ex.addSuppressed(e2);
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throw ex;
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}
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}
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}
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protected EL fetchFiltered() throws EX {
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// get element in current class
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try {
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EL el = fetchFromClass(reflectClass.clazz);
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setAccessible(el);
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return el;
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} catch (ReflectiveOperationException e1) {
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@SuppressWarnings("unchecked")
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EX ex = (EX) e1;
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// trying to bypass filtered member
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try {
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@SuppressWarnings("unchecked")
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EL[] elements = (EL[]) Reflect.ofClassOfInstance(reflectClass.clazz)
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.method(internalMethodNameElementArray(), boolean.class)
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.invoke(reflectClass.clazz, false);
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for (EL element : elements) {
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if (isEqualOurElement(element)) {
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// the values in the elements array have to be copied
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// (using special private methods in reflection api) before using it
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Object reflectionFactoryOfClazz = Reflect.ofClassOfInstance(reflectClass.clazz)
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.method("getReflectionFactory")
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.invoke(reflectClass.clazz);
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@SuppressWarnings("unchecked")
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EL copiedElement = (EL) Reflect.ofClassOfInstance(reflectionFactoryOfClazz)
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.method(internalMethodNameCopyElement(), element.getClass())
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.invoke(reflectionFactoryOfClazz, element);
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setAccessible(copiedElement);
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return copiedElement;
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}
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}
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} catch (ReflectiveOperationException e2) {
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ex.addSuppressed(e2);
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}
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throw ex;
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}
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}
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protected abstract EL fetchFromClass(Class<T> clazz) throws EX;
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protected abstract EL fetchFromReflectClass(ReflectClass<?> rc) throws EX;
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protected abstract boolean isEqualOurElement(EL el);
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protected abstract String internalMethodNameElementArray();
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protected abstract String internalMethodNameCopyElement();
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protected abstract void setAccessible(EL el);
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public EL get() {
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return cached;
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}
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public abstract int getModifiers();
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}
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public static class ReflectField<T> extends ReflectMember<T, String, Field, NoSuchFieldException> {
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/* package */ ReflectField(ReflectClass<T> c, String name, boolean bypassFilter) throws NoSuchFieldException {
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super(c, name, bypassFilter);
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}
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@Override protected Field fetchFromClass(Class<T> clazz) throws NoSuchFieldException { return clazz.getDeclaredField(identifier); }
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@Override protected Field fetchFromReflectClass(ReflectClass<?> rc) throws NoSuchFieldException { return rc.field(identifier).get(); }
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@Override protected boolean isEqualOurElement(Field el) { return identifier.equals(el.getName()); }
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@Override protected String internalMethodNameElementArray() { return "getDeclaredFields0"; }
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@Override protected String internalMethodNameCopyElement() { return "copyField"; }
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@Override protected void setAccessible(Field el) { el.setAccessible(true); }
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public Object getValue(Object instance) throws ReflectiveOperationException {
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return get().get(instance);
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}
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public Object getStaticValue() throws ReflectiveOperationException {
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return getValue(null);
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}
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public void setValue(Object instance, Object value) throws ReflectiveOperationException {
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Field f = get();
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if (Modifier.isFinal(f.getModifiers())) {
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// if the field is final, we have to do some unsafe stuff :/
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if (sunMiscUnsafeInstance != null) { // Java >= 16
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// set the value of the field, directly in the memory
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if (Modifier.isStatic(f.getModifiers())) {
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long offset = sunMiscUnsafeInstance.staticFieldOffset(f);
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sunMiscUnsafeInstance.putObject(sunMiscUnsafeInstance.staticFieldBase(f), offset, value);
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} else {
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long offset = sunMiscUnsafeInstance.objectFieldOffset(f);
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sunMiscUnsafeInstance.putObject(instance, offset, value);
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}
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} else { // Java < 16
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// change the modifier in the Field instance so the method #set(instance, value) doesn’t throw an exception
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int modifiers = f.getModifiers();
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if (Modifier.isFinal(modifiers)) {
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ofClass(Field.class).field("modifiers").fetchFiltered().set(f, modifiers & ~Modifier.FINAL);
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}
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f.set(instance, value);
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}
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}
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else { // not final value
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f.set(instance, value);
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}
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}
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public void setStaticValue(Object value) throws ReflectiveOperationException {
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setValue(null, value);
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}
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@Override
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public int getModifiers() {
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return get().getModifiers();
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}
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}
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public static class ReflectMethod<T> extends ReflectMember<T, MethodIdentifier, Method, NoSuchMethodException> {
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/* package */ ReflectMethod(ReflectClass<T> c, MethodIdentifier methodId, boolean bypassFilter) throws NoSuchMethodException {
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super(c, methodId, bypassFilter);
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}
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@Override protected Method fetchFromClass(Class<T> clazz) throws NoSuchMethodException { return clazz.getDeclaredMethod(identifier.methodName, identifier.parameters); }
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@Override protected Method fetchFromReflectClass(ReflectClass<?> rc) throws NoSuchMethodException { return rc.method(identifier, false).get(); }
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@Override protected boolean isEqualOurElement(Method el) { return identifier.methodName.equals(el.getName()) && Arrays.equals(identifier.parameters, el.getParameterTypes()); }
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@Override protected String internalMethodNameElementArray() { return "getDeclaredMethods0"; }
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@Override protected String internalMethodNameCopyElement() { return "copyMethod"; }
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@Override protected void setAccessible(Method el) { el.setAccessible(true); }
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public Object invoke(Object instance, Object... values) throws ReflectiveOperationException {
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return get().invoke(instance, values);
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}
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public Object invokeStatic(Object... values) throws ReflectiveOperationException {
|
||||
return invoke(null, values);
|
||||
}
|
||||
|
||||
@Override
|
||||
public int getModifiers() {
|
||||
return get().getModifiers();
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
public static class ReflectConstructor<T> extends ReflectMember<T, ConstructorIdentifier, Constructor<T>, NoSuchMethodException> {
|
||||
|
||||
/* package */ ReflectConstructor(ReflectClass<T> c, ConstructorIdentifier constructorId, boolean bypassFilter) throws NoSuchMethodException {
|
||||
super(c, constructorId, bypassFilter);
|
||||
}
|
||||
|
||||
// Override since we don't want to recursively search for a constructor
|
||||
@Override
|
||||
protected Constructor<T> fetch() throws NoSuchMethodException {
|
||||
Constructor<T> el = fetchFromClass(reflectClass.clazz);
|
||||
setAccessible(el);
|
||||
return el;
|
||||
}
|
||||
|
||||
@Override protected Constructor<T> fetchFromClass(Class<T> clazz) throws NoSuchMethodException { return clazz.getDeclaredConstructor(identifier.parameters); }
|
||||
@Override protected Constructor<T> fetchFromReflectClass(ReflectClass<?> rc) { throw new UnsupportedOperationException(); }
|
||||
@Override protected boolean isEqualOurElement(Constructor<T> el) { return Arrays.equals(identifier.parameters, el.getParameterTypes()); }
|
||||
@Override protected String internalMethodNameElementArray() { return "getDeclaredConstructors0"; }
|
||||
@Override protected String internalMethodNameCopyElement() { return "copyConstructor"; }
|
||||
@Override protected void setAccessible(Constructor<T> el) { el.setAccessible(true); }
|
||||
|
||||
public T instanciate(Object... values) throws ReflectiveOperationException {
|
||||
return get().newInstance(values);
|
||||
}
|
||||
|
||||
@Override
|
||||
public int getModifiers() {
|
||||
return get().getModifiers();
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
}
|
||||
|
|
|
|||
|
|
@ -0,0 +1,185 @@
|
|||
package fr.pandacube.lib.reflect;
|
||||
|
||||
import java.lang.reflect.Constructor;
|
||||
import java.lang.reflect.Field;
|
||||
import java.lang.reflect.Method;
|
||||
import java.util.Collections;
|
||||
import java.util.HashMap;
|
||||
import java.util.List;
|
||||
import java.util.Map;
|
||||
import java.util.concurrent.atomic.AtomicReference;
|
||||
|
||||
import io.github.classgraph.ClassGraph;
|
||||
import io.github.classgraph.ClassGraphException;
|
||||
import io.github.classgraph.ClassInfoList;
|
||||
import io.github.classgraph.ScanResult;
|
||||
|
||||
/**
|
||||
* Wrapper of a {@link Class} with less verbose access to methods and properties.
|
||||
* @param <T> the type of the wrapped class.
|
||||
*/
|
||||
public class ReflectClass<T> {
|
||||
private final Class<T> clazz;
|
||||
|
||||
private final Map<MethodIdentifier, ReflectMethod<T>> methodCache = Collections.synchronizedMap(new HashMap<>());
|
||||
private final Map<ConstructorIdentifier, ReflectConstructor<T>> constructorCache = Collections.synchronizedMap(new HashMap<>());
|
||||
private final Map<String, ReflectField<T>> fieldCache = Collections.synchronizedMap(new HashMap<>());
|
||||
|
||||
ReflectClass(Class<T> clazz) {
|
||||
this.clazz = clazz;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the class wrapped by this {@link ReflectClass} instance.
|
||||
* @return the class wrapped by this {@link ReflectClass} instance.
|
||||
*/
|
||||
public Class<T> get() {
|
||||
return clazz;
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
ReflectMethod<T> method(MethodIdentifier key, boolean bypassFilter) throws NoSuchMethodException {
|
||||
ReflectMethod<T> method = methodCache.get(key);
|
||||
if (method == null) {
|
||||
method = new ReflectMethod<>(this, key, bypassFilter);
|
||||
methodCache.put(key, method);
|
||||
}
|
||||
return method;
|
||||
}
|
||||
|
||||
/**
|
||||
* Provides a {@link ReflectMethod} wrapping the requested {@link Method}.
|
||||
* @param name the method name.
|
||||
* @param paramTypes the types of the method parameters.
|
||||
* @return a {@link ReflectMethod} wrapping the requested {@link Method}.
|
||||
* @throws NoSuchMethodException if the requested method doesn’t exists in the wrapped class.
|
||||
*/
|
||||
public ReflectMethod<T> method(String name, Class<?>... paramTypes) throws NoSuchMethodException {
|
||||
return method(new MethodIdentifier(name, paramTypes), false);
|
||||
}
|
||||
|
||||
/**
|
||||
* Provides a {@link ReflectMethod} wrapping the requested {@link Method}, bypassing some internal filtering in the
|
||||
* {@link Class} implementation.
|
||||
* @param name the method name.
|
||||
* @param paramTypes the types of the method parameters.
|
||||
* @return a {@link ReflectMethod} wrapping the requested {@link Method}.
|
||||
* @throws NoSuchMethodException if the requested method doesn’t exists in the wrapped class.
|
||||
*/
|
||||
public ReflectMethod<T> filteredMethod(String name, Class<?>... paramTypes) throws NoSuchMethodException {
|
||||
return method(new MethodIdentifier(name, paramTypes), true);
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
private ReflectConstructor<T> constructor(ConstructorIdentifier key, boolean bypassFilter) throws NoSuchMethodException {
|
||||
ReflectConstructor<T> constructor = constructorCache.get(key);
|
||||
if (constructor == null) {
|
||||
constructor = new ReflectConstructor<>(this, key, bypassFilter);
|
||||
constructorCache.put(key, constructor);
|
||||
}
|
||||
return constructor;
|
||||
}
|
||||
|
||||
/**
|
||||
* Provides a {@link ReflectConstructor} wrapping the requested {@link Constructor}.
|
||||
* @param paramTypes the types of the constructor parameters.
|
||||
* @return a {@link ReflectConstructor} wrapping the requested {@link Constructor}.
|
||||
* @throws NoSuchMethodException if the requested constructor doesn’t exists in the wrapped class.
|
||||
*/
|
||||
public ReflectConstructor<T> constructor(Class<?>... paramTypes) throws NoSuchMethodException {
|
||||
return constructor(new ConstructorIdentifier(paramTypes), false);
|
||||
}
|
||||
|
||||
/**
|
||||
* Provides a {@link ReflectConstructor} wrapping the requested {@link Constructor}, bypassing some internal
|
||||
* filtering in the {@link Class} implementation.
|
||||
* @param paramTypes the types of the constructor parameters.
|
||||
* @return a {@link ReflectConstructor} wrapping the requested {@link Constructor}.
|
||||
* @throws NoSuchMethodException if the requested constructor doesn’t exists in the wrapped class.
|
||||
*/
|
||||
public ReflectConstructor<T> filteredConstructor(Class<?>... paramTypes) throws NoSuchMethodException {
|
||||
return constructor(new ConstructorIdentifier(paramTypes), true);
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
private ReflectField<T> field0(String name, boolean bypassFilter) throws NoSuchFieldException {
|
||||
ReflectField<T> constructor = fieldCache.get(name);
|
||||
if (constructor == null) {
|
||||
constructor = new ReflectField<>(this, name, bypassFilter);
|
||||
fieldCache.put(name, constructor);
|
||||
}
|
||||
return constructor;
|
||||
}
|
||||
|
||||
/**
|
||||
* Provides a {@link ReflectField} wrapping the requested {@link Field}.
|
||||
* @param name the name of the field.
|
||||
* @return a {@link ReflectField} wrapping the requested {@link Field}.
|
||||
* @throws NoSuchFieldException if the requested field doesn’t exists in the wrapped class.
|
||||
*/
|
||||
public ReflectField<T> field(String name) throws NoSuchFieldException {
|
||||
return field0(name, false);
|
||||
}
|
||||
|
||||
/**
|
||||
* Provides a {@link ReflectField} wrapping the requested {@link Field}, bypassing some internal filtering in the
|
||||
* {@link Class} implementation.
|
||||
* @param name the name of the field.
|
||||
* @return a {@link ReflectField} wrapping the requested {@link Field}.
|
||||
* @throws NoSuchFieldException if the requested field doesn’t exists in the wrapped class.
|
||||
*/
|
||||
public ReflectField<T> filteredField(String name) throws NoSuchFieldException {
|
||||
return field0(name, true);
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
private final AtomicReference<List<Class<?>>> cachedSubclasses = new AtomicReference<>();
|
||||
|
||||
/**
|
||||
* Get all subclasses of the current class, using the ClassGraph library.
|
||||
* <p>
|
||||
* If the returned list is not yet cached, or {@code forceUpdateCache} is true, then the cache is updated before
|
||||
* being returned. This may take some time.
|
||||
* <p>
|
||||
* The ClassGraph library scan all class files in the class path, then loads those which will be returned by
|
||||
* this method.
|
||||
*
|
||||
* @param forceUpdateCache to force the update of the cache, even if it already filled.
|
||||
* @return the list of all subclasses found in all loaded class loader.
|
||||
* @throws ClassGraphException if any of the worker threads throws an uncaught exception, or the scan was interrupted. (see {@link ClassGraph#scan})
|
||||
* @throws IllegalArgumentException f an exception or error was thrown while trying to load any of the classes. (see {@link ClassInfoList#loadClasses()})
|
||||
*/
|
||||
public List<Class<? extends T>> getAllSubclasses(boolean forceUpdateCache) {
|
||||
synchronized (cachedSubclasses) {
|
||||
if (forceUpdateCache || cachedSubclasses.get() == null) {
|
||||
try (ScanResult scanResult = new ClassGraph().enableClassInfo().ignoreClassVisibility().scan()) {
|
||||
cachedSubclasses.set(scanResult.getSubclasses(clazz).loadClasses());
|
||||
}
|
||||
}
|
||||
@SuppressWarnings("unchecked")
|
||||
List<Class<? extends T>> ret = (List<Class<? extends T>>) (List<?>) cachedSubclasses.get();
|
||||
return ret;
|
||||
}
|
||||
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,68 @@
|
|||
package fr.pandacube.lib.reflect;
|
||||
|
||||
import java.lang.reflect.Constructor;
|
||||
import java.lang.reflect.InvocationTargetException;
|
||||
import java.util.Arrays;
|
||||
|
||||
/**
|
||||
* Wrapper for a class {@link Constructor}.
|
||||
* @param <T> the type of the class declaring the wrapped constructor.
|
||||
*/
|
||||
public final class ReflectConstructor<T> extends ReflectMember<T, ConstructorIdentifier, Constructor<T>, NoSuchMethodException> {
|
||||
|
||||
/* package */ ReflectConstructor(ReflectClass<T> c, ConstructorIdentifier constructorId, boolean bypassFilter) throws NoSuchMethodException {
|
||||
super(c, constructorId, bypassFilter);
|
||||
}
|
||||
|
||||
// Override since we don't want to recursively search for a constructor
|
||||
@Override
|
||||
protected Constructor<T> fetch() throws NoSuchMethodException {
|
||||
Constructor<T> el = fetchFromClass(reflectClass.get());
|
||||
setAccessible(el);
|
||||
return el;
|
||||
}
|
||||
|
||||
@Override
|
||||
protected Constructor<T> fetchFromClass(Class<T> clazz) throws NoSuchMethodException {
|
||||
return clazz.getDeclaredConstructor(identifier.parameters());
|
||||
}
|
||||
|
||||
@Override
|
||||
protected Constructor<T> fetchFromReflectClass(ReflectClass<?> rc) {
|
||||
throw new UnsupportedOperationException();
|
||||
}
|
||||
|
||||
@Override
|
||||
protected boolean isEqualOurElement(Constructor<T> el) {
|
||||
return Arrays.equals(identifier.parameters(), el.getParameterTypes());
|
||||
}
|
||||
|
||||
@Override
|
||||
protected String internalMethodNameElementArray() {
|
||||
return "getDeclaredConstructors0";
|
||||
}
|
||||
|
||||
@Override
|
||||
protected String internalMethodNameCopyElement() {
|
||||
return "copyConstructor";
|
||||
}
|
||||
|
||||
/**
|
||||
* Invoke this constructor to create a new instance of the declaring class of this constructor.
|
||||
* @param values the parameters used for the constructor call.
|
||||
* @return the newly created instance.
|
||||
* @throws IllegalAccessException if the wrapped Constructor object is enforcing Java language access control and
|
||||
* the underlying constructor is inaccessible. Note that this
|
||||
* {@link ReflectConstructor} automatically sets the {@link Constructor}’s accessible
|
||||
* flag to true.
|
||||
* @throws IllegalArgumentException if there is any problem with the constructor parameters (wrong number, wrong
|
||||
* type, ...).
|
||||
* @throws InstantiationException if the declaring class of this constructor is an abstract class.
|
||||
* @throws InvocationTargetException if the called constructor throws an exception.
|
||||
* @see Constructor#newInstance(Object...)
|
||||
*/
|
||||
public T instanciate(Object... values) throws InvocationTargetException, InstantiationException, IllegalAccessException {
|
||||
return get().newInstance(values);
|
||||
}
|
||||
|
||||
}
|
||||
|
|
@ -0,0 +1,153 @@
|
|||
package fr.pandacube.lib.reflect;
|
||||
|
||||
import java.lang.reflect.Field;
|
||||
import java.lang.reflect.Modifier;
|
||||
|
||||
/**
|
||||
* Wrapper for a class {@link Field}.
|
||||
* @param <T> the type of the class declaring the wrapped field.
|
||||
*/
|
||||
public final class ReflectField<T> extends ReflectMember<T, String, Field, NoSuchFieldException> {
|
||||
|
||||
private static sun.misc.Unsafe sunMiscUnsafeInstance;
|
||||
private static Field modifiersFieldInFieldClass;
|
||||
static {
|
||||
RuntimeException ex = null;
|
||||
try {
|
||||
sunMiscUnsafeInstance = Runtime.version().feature() >= 16
|
||||
? (sun.misc.Unsafe) Reflect.ofClass("sun.misc.Unsafe")
|
||||
.field("theUnsafe")
|
||||
.getStaticValue()
|
||||
: null;
|
||||
} catch (Exception e) {
|
||||
ex = new RuntimeException("Cannot access to sun.misc.Unsafe.theUnsafe value.", e);
|
||||
}
|
||||
|
||||
try {
|
||||
modifiersFieldInFieldClass = Reflect.ofClass(Field.class).field("modifiers").fetchFiltered();
|
||||
} catch (Exception e) {
|
||||
RuntimeException newEx = new RuntimeException("Cannot access " + Field.class + ".modifiers field.", e);
|
||||
if (ex != null)
|
||||
newEx.addSuppressed(ex);
|
||||
ex = newEx;
|
||||
}
|
||||
|
||||
if (ex != null)
|
||||
throw ex;
|
||||
}
|
||||
|
||||
/* package */ ReflectField(ReflectClass<T> c, String name, boolean bypassFilter) throws NoSuchFieldException {
|
||||
super(c, name, bypassFilter);
|
||||
}
|
||||
|
||||
@Override
|
||||
/* package */ Field fetchFromClass(Class<T> clazz) throws NoSuchFieldException {
|
||||
return clazz.getDeclaredField(identifier);
|
||||
}
|
||||
|
||||
@Override
|
||||
/* package */ Field fetchFromReflectClass(ReflectClass<?> rc) throws NoSuchFieldException {
|
||||
return rc.field(identifier).get();
|
||||
}
|
||||
|
||||
@Override
|
||||
/* package */ boolean isEqualOurElement(Field el) {
|
||||
return identifier.equals(el.getName());
|
||||
}
|
||||
|
||||
@Override
|
||||
/* package */ String internalMethodNameElementArray() {
|
||||
return "getDeclaredFields0";
|
||||
}
|
||||
|
||||
@Override
|
||||
/* package */ String internalMethodNameCopyElement() {
|
||||
return "copyField";
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the value of this field, in the provided instance.
|
||||
* @param instance the instance in which to get the value of the field.
|
||||
* @return the value of this field, in the provided instance.
|
||||
* @throws IllegalAccessException if the wrapped Field object is enforcing Java language access control and the
|
||||
* underlying field is inaccessible. Note that this {@link ReflectField}
|
||||
* automatically sets the {@link Field}’s accessible flag to true.
|
||||
* @throws IllegalArgumentException if the specified instance is not an instance of the class or interface declaring
|
||||
* the wrapped field (or a subclass or implementor thereof).
|
||||
* @throws NullPointerException if the specified instance is null and the field is an instance field.
|
||||
* @see Field#get(Object)
|
||||
*/
|
||||
public Object getValue(Object instance) throws IllegalAccessException {
|
||||
return get().get(instance);
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the value of this static field.
|
||||
* @return the value of this static field.
|
||||
* @throws IllegalAccessException if the wrapped Field object is enforcing Java language access control and the
|
||||
* underlying field is inaccessible. Note that this {@link ReflectField}
|
||||
* automatically sets the {@link Field}’s accessible flag to true.
|
||||
* @throws NullPointerException if the wrapped {@link Field} is actually an instance field. In this case,
|
||||
* {@link #getValue(Object)} should be called instead with a non-null parameter.
|
||||
* @see Field#get(Object)
|
||||
*/
|
||||
public Object getStaticValue() throws IllegalAccessException {
|
||||
return getValue(null);
|
||||
}
|
||||
|
||||
/**
|
||||
* Sets the value of this field, in the provided instance.
|
||||
* @param instance the instance in which to set the value of the field.
|
||||
* @param value the new value for this field.
|
||||
* @throws IllegalAccessException if the wrapped Field object is enforcing Java language access control and the
|
||||
* underlying field is inaccessible. Note that this {@link ReflectField}
|
||||
* automatically sets the {@link Field}’s accessible flag to true.
|
||||
* @throws IllegalArgumentException if the specified instance is not an instance of the class or interface declaring
|
||||
* the wrapped field (or a subclass or implementor thereof).
|
||||
* @throws NullPointerException if the specified instance is null and the field is an instance field.
|
||||
* @see Field#set(Object, Object)
|
||||
*/
|
||||
public void setValue(Object instance, Object value) throws IllegalAccessException {
|
||||
|
||||
Field f = get();
|
||||
int realModifiers = f.getModifiers();
|
||||
if (Modifier.isFinal(realModifiers)) {
|
||||
// if the field is final, we have to do some unsafe stuff :/
|
||||
if (sunMiscUnsafeInstance != null) { // Java >= 16
|
||||
// set the value of the field, directly in the memory
|
||||
if (Modifier.isStatic(realModifiers)) {
|
||||
long offset = sunMiscUnsafeInstance.staticFieldOffset(f);
|
||||
sunMiscUnsafeInstance.putObject(sunMiscUnsafeInstance.staticFieldBase(f), offset, value);
|
||||
} else {
|
||||
long offset = sunMiscUnsafeInstance.objectFieldOffset(f);
|
||||
sunMiscUnsafeInstance.putObject(instance, offset, value);
|
||||
}
|
||||
} else { // Java < 16
|
||||
// change the modifier in the Field instance so the method #set(instance, value) doesn’t throw an exception
|
||||
try {
|
||||
modifiersFieldInFieldClass.set(f, realModifiers & ~Modifier.FINAL);
|
||||
f.set(instance, value);
|
||||
} finally {
|
||||
modifiersFieldInFieldClass.set(f, realModifiers);
|
||||
}
|
||||
}
|
||||
} else { // not final value
|
||||
f.set(instance, value);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Sets the value of this static field.
|
||||
* @param value the new value for this field.
|
||||
* @throws IllegalAccessException if the wrapped Field object is enforcing Java language access control and the
|
||||
* underlying field is inaccessible. Note that this {@link ReflectField}
|
||||
* automatically sets the {@link Field}’s accessible flag to true.
|
||||
* @throws NullPointerException if the wrapped {@link Field} is actually an instance field. In this case,
|
||||
* {@link #setValue(Object, Object)} should be called instead with a non-null parameter.
|
||||
* @see Field#set(Object, Object)
|
||||
*/
|
||||
public void setStaticValue(Object value) throws IllegalAccessException {
|
||||
setValue(null, value);
|
||||
}
|
||||
|
||||
}
|
||||
|
|
@ -0,0 +1,132 @@
|
|||
package fr.pandacube.lib.reflect;
|
||||
|
||||
import java.lang.reflect.AccessibleObject;
|
||||
import java.lang.reflect.Constructor;
|
||||
import java.lang.reflect.Field;
|
||||
import java.lang.reflect.Member;
|
||||
import java.lang.reflect.Method;
|
||||
|
||||
/**
|
||||
* Abstract wrapper for a class member (field, method or constructor).
|
||||
* @param <T> the type of the class declaring the wrapped member.
|
||||
* @param <ID> type of object uniquely identifying the member into the class.
|
||||
* @param <EL> the type of the class member (like {@link Field}, {@link Method} or {@link Constructor})
|
||||
* @param <EX> the type of exception thrown by the {@link Class} method responsible to get the member instance (like
|
||||
* {@link NoSuchFieldException} or {@link NoSuchMethodException}).
|
||||
*/
|
||||
public sealed abstract class ReflectMember<T, ID, EL extends AccessibleObject & Member, EX extends ReflectiveOperationException>
|
||||
permits ReflectField, ReflectMethod, ReflectConstructor {
|
||||
|
||||
/* package */ final ReflectClass<T> reflectClass;
|
||||
/* package */ final ID identifier;
|
||||
private final EL member;
|
||||
|
||||
/* package */ ReflectMember(ReflectClass<T> c, ID id, boolean bypassFilter) throws EX {
|
||||
reflectClass = c;
|
||||
identifier = id;
|
||||
member = (bypassFilter) ? fetchFiltered() : fetch();
|
||||
}
|
||||
|
||||
|
||||
/* package */ EL fetch() throws EX {
|
||||
|
||||
// get element in current class
|
||||
try {
|
||||
EL el = fetchFromClass(reflectClass.get());
|
||||
setAccessible(el);
|
||||
return el;
|
||||
} catch (ReflectiveOperationException e1) {
|
||||
@SuppressWarnings("unchecked")
|
||||
EX ex = (EX) e1;
|
||||
|
||||
// get parent class
|
||||
Class<? super T> superClass = reflectClass.get().getSuperclass();
|
||||
if (superClass == null)
|
||||
throw ex;
|
||||
|
||||
// get element in parent class (will do recursion)
|
||||
try {
|
||||
EL el = fetchFromReflectClass(Reflect.ofClass(superClass));
|
||||
setAccessible(el);
|
||||
return el;
|
||||
} catch (ReflectiveOperationException e2) {
|
||||
ex.addSuppressed(e2);
|
||||
throw ex;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* package */ EL fetchFiltered() throws EX {
|
||||
|
||||
// get element in current class
|
||||
try {
|
||||
EL el = fetchFromClass(reflectClass.get());
|
||||
setAccessible(el);
|
||||
return el;
|
||||
} catch (ReflectiveOperationException e1) {
|
||||
@SuppressWarnings("unchecked")
|
||||
EX ex = (EX) e1;
|
||||
|
||||
// trying to bypass filtered member
|
||||
try {
|
||||
@SuppressWarnings("unchecked")
|
||||
EL[] elements = (EL[]) Reflect.ofClassOfInstance(reflectClass.get())
|
||||
.method(internalMethodNameElementArray(), boolean.class)
|
||||
.invoke(reflectClass.get(), false);
|
||||
for (EL element : elements) {
|
||||
if (isEqualOurElement(element)) {
|
||||
// the values in the elements array have to be copied
|
||||
// (using special private methods in reflection api) before using it
|
||||
Object reflectionFactoryOfClazz = Reflect.ofClassOfInstance(reflectClass.get())
|
||||
.method("getReflectionFactory")
|
||||
.invoke(reflectClass.get());
|
||||
@SuppressWarnings("unchecked")
|
||||
EL copiedElement = (EL) Reflect.ofClassOfInstance(reflectionFactoryOfClazz)
|
||||
.method(internalMethodNameCopyElement(), element.getClass())
|
||||
.invoke(reflectionFactoryOfClazz, element);
|
||||
setAccessible(copiedElement);
|
||||
return copiedElement;
|
||||
}
|
||||
}
|
||||
} catch (ReflectiveOperationException e2) {
|
||||
ex.addSuppressed(e2);
|
||||
}
|
||||
|
||||
throw ex;
|
||||
}
|
||||
}
|
||||
|
||||
/* package */ abstract EL fetchFromClass(Class<T> clazz) throws EX;
|
||||
|
||||
/* package */ abstract EL fetchFromReflectClass(ReflectClass<?> rc) throws EX;
|
||||
|
||||
/* package */ abstract boolean isEqualOurElement(EL el);
|
||||
|
||||
/* package */ abstract String internalMethodNameElementArray();
|
||||
|
||||
/* package */ abstract String internalMethodNameCopyElement();
|
||||
|
||||
/* package */ void setAccessible(EL el) {
|
||||
el.setAccessible(true);
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the wrapped class member.
|
||||
* @return the wrapped class member.
|
||||
*/
|
||||
public EL get() {
|
||||
return member;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the modifiers of the wrapped class member.
|
||||
* @return the modifiers of the wrapped class member.
|
||||
* @see Field#getModifiers()
|
||||
* @see Method#getModifiers()
|
||||
* @see Constructor#getModifiers()
|
||||
*/
|
||||
public int getModifiers() {
|
||||
return get().getModifiers();
|
||||
}
|
||||
|
||||
}
|
||||
|
|
@ -0,0 +1,80 @@
|
|||
package fr.pandacube.lib.reflect;
|
||||
|
||||
import java.lang.reflect.InvocationTargetException;
|
||||
import java.lang.reflect.Method;
|
||||
import java.util.Arrays;
|
||||
|
||||
/**
|
||||
* Wrapper for a class {@link Method}.
|
||||
* @param <T> the type of the class declaring the wrapped method.
|
||||
*/
|
||||
public final class ReflectMethod<T> extends ReflectMember<T, MethodIdentifier, Method, NoSuchMethodException> {
|
||||
|
||||
/* package */ ReflectMethod(ReflectClass<T> c, MethodIdentifier methodId, boolean bypassFilter) throws NoSuchMethodException {
|
||||
super(c, methodId, bypassFilter);
|
||||
}
|
||||
|
||||
@Override
|
||||
protected Method fetchFromClass(Class<T> clazz) throws NoSuchMethodException {
|
||||
return clazz.getDeclaredMethod(identifier.methodName(), identifier.parameters());
|
||||
}
|
||||
|
||||
@Override
|
||||
protected Method fetchFromReflectClass(ReflectClass<?> rc) throws NoSuchMethodException {
|
||||
return rc.method(identifier, false).get();
|
||||
}
|
||||
|
||||
@Override
|
||||
protected boolean isEqualOurElement(Method el) {
|
||||
return identifier.methodName().equals(el.getName()) && Arrays.equals(identifier.parameters(), el.getParameterTypes());
|
||||
}
|
||||
|
||||
@Override
|
||||
protected String internalMethodNameElementArray() {
|
||||
return "getDeclaredMethods0";
|
||||
}
|
||||
|
||||
@Override
|
||||
protected String internalMethodNameCopyElement() {
|
||||
return "copyMethod";
|
||||
}
|
||||
|
||||
/**
|
||||
* Invokes this method on the specified instance with the specified parameters.
|
||||
* @param instance the instance on which to call the method.
|
||||
* @param values the parameters used for the method call.
|
||||
* @return the eventual return value of the method call.
|
||||
* @throws IllegalAccessException if the wrapped Method object is enforcing Java language access control and the
|
||||
* underlying method is inaccessible. Note that this {@link ReflectMethod}
|
||||
* automatically sets the {@link Method}’s accessible flag to true.
|
||||
* @throws IllegalArgumentException if the specified instance is not an instance of the class or interface declaring
|
||||
* the wrapped method (or a subclass or implementor thereof), or if there is any
|
||||
* problem with the method parameters (wrong number, wrong type, ...).
|
||||
* @throws NullPointerException if the specified instance is null and the field is an instance field.
|
||||
* @throws InvocationTargetException if the called method throws an exception.
|
||||
* @see Method#invoke(Object, Object...)
|
||||
*/
|
||||
public Object invoke(Object instance, Object... values) throws InvocationTargetException, IllegalAccessException {
|
||||
return get().invoke(instance, values);
|
||||
}
|
||||
|
||||
/**
|
||||
* Invokes this static method with the specified parameters.
|
||||
* @param values the parameters used for the method call.
|
||||
* @return the eventual return value of the method call.
|
||||
* @throws IllegalAccessException if the wrapped Method object is enforcing Java language access control and the
|
||||
* underlying method is inaccessible. Note that this {@link ReflectMethod}
|
||||
* automatically sets the {@link Method}’s accessible flag to true.
|
||||
* @throws IllegalArgumentException if there is any problem with the method parameters (wrong number, wrong type,
|
||||
* ...).
|
||||
* @throws NullPointerException if the wrapped {@link Method} is actually an instance method. In this case,
|
||||
* {@link #invoke(Object, Object...)} should be called instead with a non-null first
|
||||
* parameter.
|
||||
* @throws InvocationTargetException if the called method throws an exception.
|
||||
* @see Method#invoke(Object, Object...)
|
||||
*/
|
||||
public Object invokeStatic(Object... values) throws InvocationTargetException, IllegalAccessException {
|
||||
return invoke(null, values);
|
||||
}
|
||||
|
||||
}
|
||||
Loading…
Reference in New Issue