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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.scanner.impl;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
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.common.java.io.IOHelper;
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.ContributionReadException;
import org.apache.tuscany.sca.contribution.scanner.ContributionScanner;
/**
* JAR Contribution processor.
*
* @version $Rev$ $Date$
*/
public class JarContributionScanner implements ContributionScanner {
private ContributionFactory contributionFactory;
public JarContributionScanner(ContributionFactory contributionFactory) {
this.contributionFactory = contributionFactory;
}
public String getContributionType() {
return PackageType.JAR;
}
public List<Artifact> scan(Contribution contribution) throws ContributionReadException {
// Assume the URL references a JAR file
try {
URL url = new URL(contribution.getLocation());
JarInputStream jar = new JarInputStream(IOHelper.openStream(url));
try {
Set<String> names = new HashSet<String>();
while (true) {
JarEntry entry = jar.getNextJarEntry();
if (entry == null) {
// EOF
break;
}
String name = entry.getName();
if (name.length() != 0 && !name.startsWith(".")) {
// Trim trailing /
if (name.endsWith("/")) {
name = name.substring(0, name.length() - 1);
}
// Add the entry name
if (!names.contains(name)) {
names.add(name);
// Add parent folder names to the list too
for (;;) {
int s = name.lastIndexOf('/');
if (s == -1) {
name = "";
} else {
name = name.substring(0, s);
}
if (name.length() != 0 && !names.contains(name)) {
names.add(name);
} else {
break;
}
}
}
}
}
// Return list of artifacts
List<Artifact> artifacts = new ArrayList<Artifact>();
for(String uri : names) {
Artifact artifact = contributionFactory.createArtifact();
artifact.setURI(uri);
artifact.setLocation(getArtifactURL(contribution, uri).toString());
artifacts.add(artifact);
}
contribution.getTypes().add(getContributionType());
return artifacts;
} finally {
jar.close();
}
} catch (IOException e) {
throw new ContributionReadException(e);
}
}
/**
* Produces a location URL for a given artifact in the contribution
*
* @param contribution
* @param artifact
* @return
* @throws ContributionReadException
*/
private static URL getArtifactURL(Contribution contribution, String artifact) throws ContributionReadException {
try {
URL url;
if (contribution.toString().startsWith("jar:")) {
url = new URL(new URL(contribution.getLocation()), artifact.toString());
} else {
url = new URL("jar:" + contribution.getLocation() + "!/" + artifact);
}
return url;
} catch (MalformedURLException e) {
throw new ContributionReadException(e);
}
}
}
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