/*******************************************************************************
* Copyright (c) 2013 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.equinox.ds.tests.tb26;
import java.io.ByteArrayOutputStream;
import java.io.Closeable;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URI;
import java.net.URL;
import org.eclipse.osgi.service.urlconversion.URLConverter;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleContext;
import org.osgi.framework.Filter;
import org.osgi.framework.InvalidSyntaxException;
import org.osgi.service.component.ComponentContext;
import org.osgi.util.tracker.ServiceTracker;
public abstract class Component {
protected ComponentContext context;
protected ServiceTracker<URLConverter, URLConverter> tracker;
public abstract String getName();
public abstract void update() throws Exception;
protected void activate(ComponentContext context) throws InvalidSyntaxException {
this.context = context;
BundleContext bc = context.getBundleContext();
Filter f = bc.createFilter("(&(objectClass=" + URLConverter.class.getName() + ")(protocol=bundleentry))");
tracker = new ServiceTracker<URLConverter, URLConverter>(bc, f, null);
tracker.open();
}
protected void deactivate(ComponentContext context) {
tracker.close();
}
protected void replaceCurrentComponentXmlWith(String componentXmlFileName) throws Exception {
writeResource("component.xml", readResource(componentXmlFileName));
}
private void closeSilently(Closeable closeable) {
try {
closeable.close();
}
catch (IOException e) {}
}
private URL getResource(String name) {
Bundle b = context.getBundleContext().getBundle();
URL result = b.getResource(name);
if (result == null)
result = b.findEntries("/", name, true).nextElement();
return result;
}
private File getResourceAsFile(String name) throws Exception {
return new File(getResourceAsUri(name));
}
private FileInputStream getResourceAsFileInputStream(String name) throws Exception {
return new FileInputStream(getResourceAsFile(name));
}
private URI getResourceAsUri(String name) throws Exception {
URL url = getResource(name);
URLConverter converter = tracker.getService();
url = converter.toFileURL(url);
return url.toURI();
}
private byte[] readResource(String name) throws Exception {
FileInputStream fis = getResourceAsFileInputStream(name);
try {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
try {
byte[] bytes = new byte[1024];
int read;
while((read = fis.read(bytes)) != -1)
baos.write(bytes, 0, read);
return baos.toByteArray();
}
finally {
closeSilently(baos);
}
}
finally {
closeSilently(fis);
}
}
private void writeResource(String name, byte[] content) throws Exception {
File file = getResourceAsFile(name);
FileOutputStream fos = new FileOutputStream(file);
try {
fos.write(content);
}
finally {
closeSilently(fos);
}
// Ensure the update will be detected.
file.setLastModified(file.lastModified() + 1000);
}
}