/*
 * Copyright 2005 the original author or authors.
 * 
 * Licensed 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.wamblee.photos.concurrent;

import java.io.IOException;
import java.io.InputStream;

import org.wamblee.photos.model.Photo;

/**
 * Decorator for a photo to make it thread-safe.
 */
public class ConcurrentPhoto extends ConcurrentPhotoEntry implements Photo {

    public ConcurrentPhoto(Photo aPhoto) {
        super(aPhoto);
    }

    private Photo decorated() {
        return (Photo)getEntry();
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.wamblee.photos.model.Photo#getThumbNail()
     */
    public InputStream getThumbNail() throws IOException {
        lock().acquireRead();
        try {
            return decorated().getThumbNail();
        } finally {
            lock().releaseRead();
        }
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.wamblee.photos.model.Photo#getPhoto()
     */
    public InputStream getPhoto() throws IOException {
        lock().acquireRead();
        try {
            return decorated().getPhoto();
        } finally {
            lock().releaseRead();
        }
    }
}