BroadcastHandler.java

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 * 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
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package org.apache.sling.scripting.sightly.impl.compiler.util.stream;

import java.util.ArrayList;

import org.apache.sling.scripting.sightly.compiler.commands.Command;
import org.apache.sling.scripting.sightly.compiler.commands.CommandHandler;

/**
 * Broadcasts commands to other handlers
 */
public class BroadcastHandler implements CommandHandler {

    private ArrayList<CommandHandler> handlers = new ArrayList<>();

    /**
     * Add a new child handler
     * @param handler - the listening handler
     */
    public void addHandler(CommandHandler handler) {
        handlers.add(handler);
    }


    @Override
    public void onEmit(Command command) {
        for (CommandHandler handler : handlers) {
            handler.onEmit(command);
        }
    }

    @Override
    public void onError(String errorMessage) {
        for (CommandHandler handler : handlers) {
            handler.onError(errorMessage);
        }
    }

    @Override
    public void onDone() {
        for (CommandHandler handler : handlers) {
            handler.onDone();
        }
    }
}