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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.tuscany.sca.contribution.osgi.impl;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.jar.JarEntry;
import java.util.jar.JarInputStream;
import org.apache.tuscany.sca.contribution.Artifact;
import org.apache.tuscany.sca.contribution.Contribution;
import org.apache.tuscany.sca.contribution.ContributionFactory;
import org.apache.tuscany.sca.contribution.PackageType;
import org.apache.tuscany.sca.contribution.processor.ContributionException;
import org.apache.tuscany.sca.contribution.processor.ContributionReadException;
import org.apache.tuscany.sca.contribution.scanner.ContributionScanner;
import org.osgi.framework.Bundle;
import org.osgi.framework.Constants;
/**
* Bundle Contribution package processor.
*
* @version $Rev$ $Date$
*/
public class OSGiBundleContributionScanner implements ContributionScanner {
private ContributionFactory contributionFactory;
public OSGiBundleContributionScanner(ContributionFactory contributionFactory) {
this.contributionFactory = contributionFactory;
}
public String getContributionType() {
return PackageType.BUNDLE;
}
public List<Artifact> scan(Contribution contribution) throws ContributionReadException {
Bundle bundle = OSGiBundleActivator.findBundle(contribution.getLocation());
if (bundle == null) {
throw new IllegalArgumentException("Could not find OSGi bundle " + contribution.getLocation());
}
List<Artifact> artifacts = new ArrayList<Artifact>();
Set<String> bundleClassPath = new HashSet<String>();
String cp = (String)bundle.getHeaders().get(Constants.BUNDLE_CLASSPATH);
if (cp != null) {
String[] paths = cp.split(",");
for (String path : paths) {
bundleClassPath.add(path.trim());
}
}
try {
// Test if the bundle is an Eclipse project
boolean devMode = (bundle.getEntry("/.project") != null);
// FIXME: The entries can come from fragments. Do we need to have a way to differentiate the entries?
Enumeration<?> entries = bundle.findEntries("/", "*", true);
while (entries.hasMoreElements()) {
URL entry = (URL)entries.nextElement();
String entryName = entry.getPath();
if (devMode && entryName.contains("/.svn/")
|| entryName.startsWith("/.")
|| entryName.startsWith("/target/")
|| entryName.startsWith("/src/")) {
// Ignore .svn files
// Ignore .classpath, .project, src, and target
continue;
}
if (entryName.startsWith("/")) {
entryName = entryName.substring(1);
}
//Add artifact to list
Artifact artifact = contributionFactory.createArtifact();
artifact.setURI(entryName);
artifact.setLocation(entry.toString());
artifacts.add(artifact);
//if Artifact is a JAR, add jar artifacts as well
/*
if (entryName.endsWith(".jar") && bundleClassPath.contains(entryName)) {
List<String> jarArtifactURIs = getJarArtifacts(entry, entry.openStream());
for( String uri : jarArtifactURIs) {
Artifact jarArtifact = contributionFactory.createArtifact();
jarArtifact.setURI(uri);
URL url = bundle.getResource(uri);
String location = null;
if(url!=null) {
location = url.toString();
}
jarArtifact.setLocation(location);
artifacts.add(jarArtifact);
}
}
*/
}
} catch (Exception e) {
throw new RuntimeException(e);
}
contribution.getExtensions().add(bundle);
contribution.getTypes().add(getContributionType());
contribution.setClassLoader(new BundleClassLoader(bundle));
return artifacts;
}
/**
* Retrieve a list of Artifact URIs for a given JAR
* @param packageSourceURL
* @param inputStream
* @return
* @throws ContributionException
* @throws IOException
*/
private List<String> getJarArtifacts(URL packageSourceURL, InputStream inputStream) throws ContributionException, IOException {
if (packageSourceURL == null) {
throw new IllegalArgumentException("Invalid null package source URL.");
}
if (inputStream == null) {
throw new IllegalArgumentException("Invalid null source inputstream.");
}
// Assume the root is a jar file
JarInputStream jar = new JarInputStream(inputStream);
try {
Set<String> names = new HashSet<String>();
while (true) {
JarEntry entry = jar.getNextJarEntry();
if (entry == null) {
// EOF
break;
}
// FIXME: Maybe we should externalize the filter as a property
String name = entry.getName();
if (!name.startsWith(".") && !entry.isDirectory()) {
// Trim trailing /
if (name.endsWith("/")) {
name = name.substring(0, name.length() - 1);
}
// Add the entry name
if (!names.contains(name) && name.length() > 0) {
names.add(name);
}
}
}
// Return list of URIs
List<String> artifacts = new ArrayList<String>();
for (String name : names) {
artifacts.add(name);
}
return artifacts;
} finally {
jar.close();
}
}
private static class BundleClassLoader extends ClassLoader {
private Bundle bundle;
public BundleClassLoader(Bundle bundle) {
super(null);
this.bundle = bundle;
}
@Override
protected Class<?> findClass(String name) throws ClassNotFoundException {
return bundle.loadClass(name);
}
@Override
protected URL findResource(String name) {
return bundle.getResource(name);
}
@SuppressWarnings("unchecked")
@Override
protected Enumeration<URL> findResources(String name) throws IOException {
Enumeration<URL> urls = bundle.getResources(name);
if (urls == null) {
List<URL> list = Collections.emptyList();
return Collections.enumeration(list);
} else {
return urls;
}
}
}
}
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