/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.openjpa.persistence.query;
/**
* Denotes e1 LIKE e2 Expression.
*
* @author Pinaki Poddar
*
*/
public class LikeExpression extends BinaryExpressionPredicate {
private final Object _echar;
private final boolean _escaped;
public LikeExpression(Expression e, Expression pattern, Object echar) {
super(e, BinaryConditionalOperator.LIKE,
BinaryConditionalOperator.LIKE_NOT, pattern);
_echar = echar;
_escaped = true;
}
public LikeExpression(Expression e, Expression pattern) {
super(e, BinaryConditionalOperator.LIKE,
BinaryConditionalOperator.LIKE_NOT, pattern);
_echar = null;
_escaped = false;
}
@Override
public String asExpression(AliasContext ctx) {
return super.asExpression(ctx) +
(_escaped ? "ESCAPE " + JPQLHelper.toJPQL(ctx, _echar) : EMPTY);
}
}