/*
* 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;
/**
* Logical Predicate combines two predicates with a logical operator.
*
* @author Pinaki Poddar
*
*/
public class LogicalPredicate extends AbstractVisitable
implements Predicate, Visitable {
private final Predicate _p1;
private final Predicate _p2;
private final ConditionalOperator _op;
private final ConditionalOperator _nop;
public LogicalPredicate(Predicate p1, ConditionalOperator op,
ConditionalOperator nop, Predicate p2) {
_p1 = p1;
_p2 = p2;
_op = op;
_nop = nop;
}
public Predicate and(Predicate predicate) {
return new AndPredicate(this, predicate);
}
public Predicate or(Predicate predicate) {
return new OrPredicate(this, predicate);
}
public Predicate not() {
return new LogicalPredicate(_p1.not(), _nop, _op, _p2.not());
}
public String asExpression(AliasContext ctx) {
return OPEN_BRACE + ((Visitable)_p1).asExpression(ctx) + SPACE + _op +
SPACE + ((Visitable)_p2).asExpression(ctx) + CLOSE_BRACE;
}
}