/*
* 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;
import org.apache.flink.cep.pattern.Pattern;
import org.apache.flink.streaming.api.datastream.DataStream;
/**
* Utility class for complex event processing.
*
* Methods which transform a {@link DataStream} into a {@link PatternStream} to do CEP.
*/
public class CEP {
/**
* Creates a {@link PatternStream} from an input data stream and a pattern.
*
* @param input DataStream containing the input events
* @param pattern Pattern specification which shall be detected
* @param <T> Type of the input events
* @return Resulting pattern stream
*/
public static <T> PatternStream<T> pattern(DataStream<T> input, Pattern<T, ?> pattern) {
return new PatternStream<>(input, pattern);
}
}