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Library to support multi-task programming. Allows composition and control of tasks.
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/*
 * Copyright (c) 2014, Victor Nazarov 
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the Victor Nazarov nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL  BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package com.github.sviperll.tasks;

/**
 * This class represents TaskDefinition that behaves the same as a TaskDefinition passed to the constructor
 * but performes cleanup as the last action performed by run method.
 * 
 * #close method does nothing.
 * When #run method is called, #run method of the original task is called at first
 * and than #close method of the original task is called
 */
class CloseOnEachRunTask implements TaskDefinition {
    private final TaskDefinition task;
    
    /**
     * 
     * @param task original task to base behaviour on
     */
    public CloseOnEachRunTask(TaskDefinition task) {
        this.task = task;
    }

    /**
     * Calls #stop method of the original task @see TaskDefinition#stop
     */
    @Override
    public void stop() {
        task.stop();
    }

    /**
     * Does nothing
     */
    @Override
    public void close() {
    }

    /**
     * Calls #run method of the original task @see TaskDefinition#run
     * and than calls #close method of the original task @see TaskDefinition#close
     */
    @Override
    public void run() {
        try {
            task.run();
        } finally {
            task.close();
        }
    }
}