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/*
* Jitsi, the OpenSource Java VoIP and Instant Messaging client.
*
* Copyright @ 2015 Atlassian Pty Ltd
*
* 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 net.java.sip.communicator.impl.gui.utils;
import net.java.sip.communicator.impl.gui.*;
import net.java.sip.communicator.plugin.desktoputil.*;
import net.java.sip.communicator.service.gui.*;
import net.java.sip.communicator.service.resources.*;
import net.java.sip.communicator.util.*;
import javax.imageio.*;
import java.awt.image.*;
import java.net.*;
import java.util.*;
/**
* Service responsible for loading images and possibly cache them.
*
* @author Damian Minkov
*/
public class ImageLoaderServiceImpl
implements ImageLoaderService<BufferedImage>
{
/**
* The <tt>Logger</tt> used by the <tt>ImageLoaderServiceImpl</tt> class
* and its instances for logging output.
*/
private static final Logger logger =
Logger.getLogger(ImageLoaderServiceImpl.class);
/**
* Stores all already loaded images.
*/
private static final Map<ImageID, BufferedImage> loadedImages =
new Hashtable<ImageID, BufferedImage>();
/**
* Loads an image from a given image identifier.
*
* @param imageID The identifier of the image.
* @return The image for the given identifier.
*/
public BufferedImage getImage(ImageID imageID)
{
BufferedImage image = null;
if (loadedImages.containsKey(imageID))
{
image = loadedImages.get(imageID);
}
else
{
URL path = GuiActivator.getResources().getImageURL(imageID.getId());
if (path != null)
{
try
{
image = ImageIO.read(path);
loadedImages.put(imageID, image);
}
catch (Exception ex)
{
logger.error("Failed to load image: " + path, ex);
}
}
}
return image;
}
/**
* Loads an image from a given image identifier and return
* bytes of the image.
*
* @param imageID The identifier of the image.
* @return The image bytes for the given identifier.
*/
public byte[] getImageBytes(ImageID imageID)
{
BufferedImage image = getImage(imageID);
if(image != null)
return ImageUtils.toByteArray(image);
else
return null;
}
/**
* Clears the images cache.
*/
public void clearCache()
{
loadedImages.clear();
}
}
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