/*
* 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.flink.cep.pattern.conditions;
/**
* Utility class containing an {@link IterativeCondition} that always returns
* {@code true} and one that always returns {@code false}.
*/
public class BooleanConditions {
/**
* @return An {@link IterativeCondition} that always returns {@code true}.
*/
public static <T> IterativeCondition<T> trueFunction() {
return new SimpleCondition<T>() {
private static final long serialVersionUID = 8379409657655181451L;
@Override
public boolean filter(T value) throws Exception {
return true;
}
};
}
/**
* @return An {@link IterativeCondition} that always returns {@code false}.
*/
public static <T> IterativeCondition<T> falseFunction() {
return new SimpleCondition<T>() {
private static final long serialVersionUID = -823981593720949910L;
@Override
public boolean filter(T value) throws Exception {
return false;
}
};
}
}