/*
* Copyright 2015, The Querydsl Team (http://www.querydsl.com/team)
*
* Licensed 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 com.querydsl.core.types;
import javax.annotation.Nullable;
import javax.annotation.concurrent.Immutable;
import com.google.common.collect.ImmutableList;
/**
* {@code PredicateTemplate} provides a Boolean typed {@link TemplateExpression} implementation
*
* @author tiwe
*
*/
@Immutable
public class PredicateTemplate extends TemplateExpressionImpl<Boolean> implements Predicate {
private static final long serialVersionUID = -5371430939203772072L;
@Nullable
private transient volatile Predicate not;
protected PredicateTemplate(Template template, ImmutableList<?> args) {
super(Boolean.class, template, args);
}
@Override
public Predicate not() {
if (not == null) {
not = ExpressionUtils.predicate(Ops.NOT, this);
}
return not;
}
}