351 lines
9.9 KiB
Java
351 lines
9.9 KiB
Java
package fr.pandacube.lib.db;
|
|
|
|
import java.util.ArrayList;
|
|
import java.util.Collection;
|
|
import java.util.List;
|
|
|
|
import fr.pandacube.lib.util.Log;
|
|
|
|
/**
|
|
* A SQL {@code WHERE} expression.
|
|
* @param <E> the table type.
|
|
*/
|
|
public abstract class SQLWhere<E extends SQLElement<E>> {
|
|
|
|
/* package */ abstract ParameterizedSQLString toSQL() throws DBException;
|
|
|
|
@Override
|
|
public String toString() {
|
|
try {
|
|
return toSQL().sqlString();
|
|
} catch (DBException e) {
|
|
Log.warning(e);
|
|
return "[SQLWhere.toString() error (see logs)]";
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Create a SQL {@code WHERE} expression that is true when this expression {@code AND} the provided expression is
|
|
* true.
|
|
* @param other the other expression.
|
|
* @return a SQL {@code WHERE} expression.
|
|
*/
|
|
public SQLWhere<E> and(SQLWhere<E> other) {
|
|
return SQLWhere.<E>and().and(this).and(other);
|
|
}
|
|
|
|
/**
|
|
* Create a SQL {@code WHERE} expression that is true when this expression {@code OR} the provided expression is
|
|
* true.
|
|
* @param other the other expression.
|
|
* @return a SQL {@code WHERE} expression.
|
|
*/
|
|
public SQLWhere<E> or(SQLWhere<E> other) {
|
|
return SQLWhere.<E>or().or(this).or(other);
|
|
}
|
|
|
|
|
|
/**
|
|
* Create a SQL {@code WHERE} expression builder joining multiple expressions with the {@code AND} operator.
|
|
* @return a SQL {@code WHERE} expression.
|
|
* @param <E> the table type.
|
|
*/
|
|
public static <E extends SQLElement<E>> SQLWhereAndBuilder<E> and() {
|
|
return new SQLWhereAndBuilder<>();
|
|
}
|
|
|
|
/**
|
|
* Create a SQL {@code WHERE} expression builder joining multiple expressions with the {@code OR} operator.
|
|
* @return a SQL {@code WHERE} expression.
|
|
* @param <E> the table type.
|
|
*/
|
|
public static <E extends SQLElement<E>> SQLWhereOrBuilder<E> or() {
|
|
return new SQLWhereOrBuilder<>();
|
|
}
|
|
|
|
|
|
/**
|
|
* A SQL {@code WHERE} expression builder joining multiple expressions with the {@code AND} or {@code OR} operator.
|
|
* @param <E> the table type.
|
|
*/
|
|
public static abstract class SQLWhereChainBuilder<E extends SQLElement<E>> extends SQLWhere<E> {
|
|
|
|
private final SQLBoolOp operator;
|
|
private final List<SQLWhere<E>> conditions = new ArrayList<>();
|
|
|
|
private SQLWhereChainBuilder(SQLBoolOp op) {
|
|
if (op == null) throw new IllegalArgumentException("op can't be null");
|
|
operator = op;
|
|
}
|
|
|
|
/* package */ void add(SQLWhere<E> sqlWhere) {
|
|
if (sqlWhere == null) throw new IllegalArgumentException("sqlWhere can't be null");
|
|
conditions.add(sqlWhere);
|
|
}
|
|
|
|
/**
|
|
* Tells if this expression builder is empty.
|
|
* The builder must not be empty
|
|
* @return true if this expression builder is empty, false otherwise.
|
|
*/
|
|
public boolean isEmpty() {
|
|
return conditions.isEmpty();
|
|
}
|
|
|
|
@Override
|
|
/* package */ ParameterizedSQLString toSQL() throws DBException {
|
|
if (conditions.isEmpty()) {
|
|
throw new DBException("SQLWhereChainBuilder needs at least one element inside !");
|
|
}
|
|
|
|
StringBuilder sql = new StringBuilder();
|
|
List<Object> params = new ArrayList<>();
|
|
boolean first = true;
|
|
|
|
for (SQLWhere<E> w : conditions) {
|
|
if (!first)
|
|
sql.append(" ").append(operator.sql).append(" ");
|
|
first = false;
|
|
|
|
ParameterizedSQLString ret = w.toSQL();
|
|
sql.append("(").append(ret.sqlString()).append(")");
|
|
params.addAll(ret.parameters());
|
|
}
|
|
|
|
return new ParameterizedSQLString(sql.toString(), params);
|
|
}
|
|
|
|
/* package */ enum SQLBoolOp {
|
|
/** Equivalent to SQL {@code "AND"}. */
|
|
AND("AND"),
|
|
/** Equivalent to SQL {@code "OR"}. */
|
|
OR("OR");
|
|
/* package */ final String sql;
|
|
|
|
SQLBoolOp(String s) {
|
|
sql = s;
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
* A SQL {@code WHERE} expression builder joining multiple expressions with the {@code AND} operator.
|
|
* @param <E> the table type.
|
|
*/
|
|
public static class SQLWhereAndBuilder<E extends SQLElement<E>> extends SQLWhereChainBuilder<E> {
|
|
|
|
private SQLWhereAndBuilder() {
|
|
super(SQLBoolOp.AND);
|
|
}
|
|
|
|
@Override
|
|
public SQLWhereAndBuilder<E> and(SQLWhere<E> other) {
|
|
add(other);
|
|
return this;
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
* A SQL {@code WHERE} expression builder joining multiple expressions with the {@code OR} operator.
|
|
* @param <E> the table type.
|
|
*/
|
|
public static class SQLWhereOrBuilder<E extends SQLElement<E>> extends SQLWhereChainBuilder<E> {
|
|
|
|
private SQLWhereOrBuilder() {
|
|
super(SQLBoolOp.OR);
|
|
}
|
|
|
|
@Override
|
|
public SQLWhereOrBuilder<E> or(SQLWhere<E> other) {
|
|
add(other);
|
|
return this;
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* package */ static class SQLWhereComp<E extends SQLElement<E>> extends SQLWhere<E> {
|
|
|
|
private final SQLField<E, ?> left;
|
|
private final SQLComparator comp;
|
|
private final Object right;
|
|
|
|
/**
|
|
* Compare a field with a value.
|
|
*
|
|
* @param l the field at left of the comparison operator. Can't be null
|
|
* @param c the comparison operator, can't be null
|
|
* @param r the value at right of the comparison operator. Can't be null
|
|
*/
|
|
/* package */ <T> SQLWhereComp(SQLField<E, T> l, SQLComparator c, T r) {
|
|
if (l == null || r == null || c == null)
|
|
throw new IllegalArgumentException("All arguments for SQLWhereComp constructor can't be null");
|
|
left = l;
|
|
comp = c;
|
|
right = r;
|
|
}
|
|
|
|
@Override
|
|
/* package */ ParameterizedSQLString toSQL() throws DBException {
|
|
List<Object> params = new ArrayList<>();
|
|
SQLElement.addValueToSQLObjectList(params, left, right);
|
|
return new ParameterizedSQLString("`" + left.getName() + "` " + comp.sql + " ? ", params);
|
|
}
|
|
|
|
/* package */ enum SQLComparator {
|
|
/** Equivalent to SQL {@code "="}. */
|
|
EQ("="),
|
|
/** Equivalent to SQL {@code ">"}. */
|
|
GT(">"),
|
|
/** Equivalent to SQL {@code ">="}. */
|
|
GEQ(">="),
|
|
/** Equivalent to SQL {@code "<"}. */
|
|
LT("<"),
|
|
/** Equivalent to SQL {@code "<="}. */
|
|
LEQ("<="),
|
|
/** Equivalent to SQL {@code "!="}. */
|
|
NEQ("!=");
|
|
|
|
/* package */ final String sql;
|
|
|
|
SQLComparator(String s) {
|
|
sql = s;
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* package */ static class SQLWhereIn<E extends SQLElement<E>> extends SQLWhere<E> {
|
|
|
|
private final SQLField<E, ?> field;
|
|
private final Collection<?> values;
|
|
|
|
/* package */ <T> SQLWhereIn(SQLField<E, T> f, Collection<T> v) {
|
|
if (f == null || v == null)
|
|
throw new IllegalArgumentException("All arguments for SQLWhereIn constructor can't be null");
|
|
field = f;
|
|
values = v;
|
|
}
|
|
|
|
@Override
|
|
/* package */ ParameterizedSQLString toSQL() throws DBException {
|
|
List<Object> params = new ArrayList<>();
|
|
|
|
if (values.isEmpty())
|
|
return new ParameterizedSQLString(" 1=0 ", params);
|
|
|
|
for (Object v : values)
|
|
SQLElement.addValueToSQLObjectList(params, field, v);
|
|
|
|
char[] questions = new char[values.size() == 0 ? 0 : (values.size() * 2 - 1)];
|
|
for (int i = 0; i < questions.length; i++)
|
|
questions[i] = i % 2 == 0 ? '?' : ',';
|
|
|
|
return new ParameterizedSQLString("`" + field.getName() + "` IN (" + new String(questions) + ") ", params);
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* package */ static class SQLWhereLike<E extends SQLElement<E>> extends SQLWhere<E> {
|
|
|
|
private final SQLField<E, ?> field;
|
|
private final String likeExpr;
|
|
|
|
/* package */ SQLWhereLike(SQLField<E, ?> f, String like) {
|
|
if (f == null || like == null)
|
|
throw new IllegalArgumentException("All arguments for SQLWhereLike constructor can't be null");
|
|
field = f;
|
|
likeExpr = like;
|
|
}
|
|
|
|
@Override
|
|
/* package */ ParameterizedSQLString toSQL() {
|
|
ArrayList<Object> params = new ArrayList<>();
|
|
params.add(likeExpr);
|
|
return new ParameterizedSQLString("`" + field.getName() + "` LIKE ? ", params);
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* package */ static class SQLWhereNull<E extends SQLElement<E>> extends SQLWhere<E> {
|
|
|
|
private final SQLField<E, ?> field;
|
|
private final boolean isNull;
|
|
|
|
/* package */ SQLWhereNull(SQLField<E, ?> field, boolean isNull) {
|
|
if (field == null)
|
|
throw new IllegalArgumentException("field can't be null");
|
|
if (!field.nullable)
|
|
Log.warning("Useless : Trying to check IS [NOT] NULL on the field " + field.getSQLElementType().getName()
|
|
+ "#" + field.getName() + " which is declared in the ORM as 'can't be null'");
|
|
this.field = field;
|
|
this.isNull = isNull;
|
|
}
|
|
|
|
@Override
|
|
/* package */ ParameterizedSQLString toSQL() {
|
|
return new ParameterizedSQLString("`" + field.getName() + "` IS " + ((isNull) ? "NULL" : "NOT NULL"), new ArrayList<>());
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
* Escapes the {@code \}, {@code _} and {@code %} in the string to be used in a {@code WHERE ... LIKE} expression.
|
|
* @param str the string to escape.
|
|
* @return the escaped string.
|
|
*/
|
|
public static String escapeLike(String str) {
|
|
return str.replace("\\", "\\\\")
|
|
.replace("_", "\\_")
|
|
.replace("%", "\\%");
|
|
}
|
|
|
|
}
|