56 lines
1.9 KiB
Java
56 lines
1.9 KiB
Java
package fr.pandacube.lib.util;
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import java.io.File;
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import java.io.IOException;
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import java.nio.file.Files;
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import java.nio.file.attribute.BasicFileAttributes;
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/**
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* Provides utility methods to manipulate files and directories
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*/
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public class FileUtils {
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/**
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* Recursively delete the provided file and all of its content if it is a directory.
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* @param target the target file or directory.
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*/
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public static void delete(File target) {
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if (target.isDirectory())
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for (File child : target.listFiles())
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delete(child);
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target.delete();
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}
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/**
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* Recursively copy the provided source file or directory to the provided target.
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* @param source the source file or directory.
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* @param target the copy destination.
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* @throws IOException if an IO error occurs.
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* @throws IllegalStateException if target file already exists and one of source or target is not a directory.
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* @throws IllegalArgumentException if at least one of the parameter is null, or if the source doesn't exist.
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*/
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public static void copy(File source, File target) throws IOException {
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if (source == null || !source.exists()) {
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throw new IllegalArgumentException("source is null or doesn't exist: " + source);
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}
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if (target == null) {
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throw new IllegalArgumentException("target cannot be null");
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}
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if (target.exists() && !(target.isDirectory() && source.isDirectory())) {
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throw new IllegalStateException("target file already exists and one of source or target is not a directory: " + target);
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}
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BasicFileAttributes sourceAttr = Files.readAttributes(source.toPath(), BasicFileAttributes.class);
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if (sourceAttr.isDirectory()) {
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if (!target.exists())
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target.mkdirs();
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for (String child : source.list()) {
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copy(new File(source, child), new File(target, child));
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}
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}
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else if (sourceAttr.isRegularFile()) {
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Files.copy(source.toPath(), target.toPath());
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}
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}
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}
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