com.liferay.portal.ejb.ImageLocalUtil.java Source code

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Here is the source code for com.liferay.portal.ejb.ImageLocalUtil.java

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/**
 * Copyright (c) 2000-2005 Liferay, LLC. All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

package com.liferay.portal.ejb;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Map;

import org.apache.commons.collections.map.LRUMap;

import EDU.oswego.cs.dl.util.concurrent.SyncMap;
import EDU.oswego.cs.dl.util.concurrent.WriterPreferenceReadWriteLock;

import com.dotmarketing.util.Logger;
import com.liferay.portal.model.Image;
import com.liferay.portal.util.ImageKey;
import com.liferay.portal.util.PropsUtil;

/**
 * <a href="ImageLocalUtil.java.html"><b><i>View Source</i></b></a>
 *
 * @author  Brian Wing Shun Chan
 * @author  Michael Weisser
 * @version $Revision: 1.13 $
 *
 */
public class ImageLocalUtil {

    public static Image get(String id) {
        ImageLocalUtil imageLocalUtil = _getInstance();

        Image image = imageLocalUtil._get(id);

        if (image == null) {
            try {
                image = ImageManagerUtil.getImage(id);
            } catch (Exception e) {
                Logger.error(ImageLocalUtil.class, e.getMessage(), e);
            }

            imageLocalUtil._put(id, image);
        }

        return image;
    }

    public static byte[] getDefaultBytes() {
        return _getInstance()._getDefaultBytes();
    }

    public static void put(String id, byte[] bytes) {
        ImageLocalUtil imageLocalUtil = _getInstance();

        ImageKey.generateNewKey(id);

        Image image = null;

        try {
            image = ImageManagerUtil.updateImage(id, bytes);
        } catch (Exception e) {
            Logger.error(ImageLocalUtil.class, e.getMessage(), e);
        }

        imageLocalUtil._put(id, image);
    }

    public static Image remove(String id) {
        ImageLocalUtil imageLocalUtil = _getInstance();

        try {
            ImageManagerUtil.deleteImage(id);
        } catch (Exception e) {
        }

        return imageLocalUtil._remove(id);
    }

    private static ImageLocalUtil _getInstance() {
        if (_instance == null) {
            synchronized (ImageLocalUtil.class) {
                if (_instance == null) {
                    _instance = new ImageLocalUtil();
                }
            }
        }

        return _instance;
    }

    private ImageLocalUtil() {
        _imagePool = new SyncMap(new LRUMap(Image.MAX_SIZE), new WriterPreferenceReadWriteLock());
    }

    private Image _get(String id) {
        return (Image) _imagePool.get(id);
    }

    private byte[] _getDefaultBytes() {
        byte[] defaultBytes = (byte[]) _imagePool.get(PropsUtil.IMAGE_DEFAULT);

        if (defaultBytes == null) {
            try {
                InputStream is = getClass().getClassLoader()
                        .getResourceAsStream(PropsUtil.get(PropsUtil.IMAGE_DEFAULT));

                if (is != null) {
                    ByteArrayOutputStream buffer = new ByteArrayOutputStream();
                    byte[] bytes = new byte[512];

                    for (int i = is.read(bytes, 0, 512); i != -1; i = is.read(bytes, 0, 512)) {

                        buffer.write(bytes, 0, i);
                    }

                    defaultBytes = buffer.toByteArray();

                    is.close();
                    buffer.close();

                    _imagePool.put(PropsUtil.IMAGE_DEFAULT, defaultBytes);
                }
            } catch (IOException ioe) {
                Logger.error(ImageLocalUtil.class, ioe.getMessage(), ioe);
            }
        }

        return defaultBytes;
    }

    private void _put(String id, Image image) {
        _imagePool.put(id, image);
    }

    private Image _remove(String id) {
        return (Image) _imagePool.remove(id);
    }

    private static ImageLocalUtil _instance;

    private Map _imagePool;

}