/*******************************************************************************
* Copyright (c) 2004, 2006 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.ui.internal.about;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.zip.CRC32;
import java.util.zip.CheckedInputStream;
import org.eclipse.core.runtime.IBundleGroup;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.ui.branding.IBundleGroupConstants;
/**
* A small class to manage the information related to IBundleGroup's.
* @since 3.0
*/
public class AboutBundleGroupData extends AboutData {
private IBundleGroup bundleGroup;
private URL licenseUrl;
private URL featureImageUrl;
private Long featureImageCrc;
private ImageDescriptor featureImage;
public AboutBundleGroupData(IBundleGroup bundleGroup) {
super(bundleGroup.getProviderName(), bundleGroup.getName(), bundleGroup
.getVersion(), bundleGroup.getIdentifier());
this.bundleGroup = bundleGroup;
}
public IBundleGroup getBundleGroup() {
return bundleGroup;
}
public URL getLicenseUrl() {
if (licenseUrl == null) {
licenseUrl = getURL(bundleGroup
.getProperty(IBundleGroupConstants.LICENSE_HREF));
}
return licenseUrl;
}
public URL getFeatureImageUrl() {
if (featureImageUrl == null) {
featureImageUrl = getURL(bundleGroup
.getProperty(IBundleGroupConstants.FEATURE_IMAGE));
}
return featureImageUrl;
}
public ImageDescriptor getFeatureImage() {
if (featureImage == null) {
featureImage = getImage(getFeatureImageUrl());
}
return featureImage;
}
public Long getFeatureImageCrc() {
if (featureImageCrc != null) {
return featureImageCrc;
}
URL url = getFeatureImageUrl();
if (url == null) {
return null;
}
// Get the image bytes
InputStream in = null;
try {
CRC32 checksum = new CRC32();
in = new CheckedInputStream(url.openStream(), checksum);
// the contents don't matter, the read just needs a place to go
byte[] sink = new byte[1024];
while (true) {
if (in.read(sink) <= 0) {
break;
}
}
featureImageCrc = new Long(checksum.getValue());
return featureImageCrc;
} catch (IOException e) {
return null;
} finally {
if (in != null) {
try {
in.close();
} catch (IOException e) {
// do nothing
}
}
}
}
public String getAboutText() {
return bundleGroup.getProperty(IBundleGroupConstants.ABOUT_TEXT);
}
}