storm-client/src/jvm/org/apache/storm/streams/processors/BranchProcessor.java

/**
 * 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.storm.streams.processors;

import java.util.HashMap;
import java.util.Map;
import org.apache.storm.streams.operations.Predicate;

public class BranchProcessor<T> extends BaseProcessor<T> {
    private final Map<Predicate<? super T>, String> predicateToStream = new HashMap<>();

    public void addPredicate(Predicate<? super T> predicate, String stream) {
        predicateToStream.put(predicate, stream);
    }

    @Override
    public void execute(T input) {
        for (Map.Entry<Predicate<? super T>, String> entry : predicateToStream.entrySet()) {
            if (entry.getKey().test(input)) {
                context.forward(input, entry.getValue());
                break;
            }
        }
    }
}