/*
* 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;
/**
* A {@link IterativeCondition condition} which negates the condition it wraps
* and returns {@code true} if the original condition returns {@code false}.
*
* @param <T> Type of the element to filter
*/
public class NotCondition<T> extends IterativeCondition<T> {
private static final long serialVersionUID = -2109562093871155005L;
private final IterativeCondition<T> original;
public NotCondition(final IterativeCondition<T> original) {
this.original = original;
}
@Override
public boolean filter(T value, Context<T> ctx) throws Exception {
return original != null && !original.filter(value, ctx);
}
}