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/*
 * 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;

import org.apache.flink.annotation.Internal;

/**
 * A {@link IterativeCondition condition} which negates the condition it wraps and returns {@code
 * true} if the original condition returns {@code false}.
 *
 * @param  Type of the element to filter
 * @deprecated Please use {@link RichNotCondition} instead. This class exists just for backwards
 *     compatibility and will be removed in FLINK-10113.
 */
@Internal
@Deprecated
public class NotCondition extends IterativeCondition {
    private static final long serialVersionUID = -2109562093871155005L;

    private final IterativeCondition original;

    public NotCondition(final IterativeCondition original) {
        this.original = original;
    }

    @Override
    public boolean filter(T value, Context ctx) throws Exception {
        return original != null && !original.filter(value, ctx);
    }
}