/*
* Copyright 2013 Red Hat Inc. and/or its affiliates and other contributors.
*
* 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 org.switchyard.common.version.manifest;
import static java.util.jar.JarFile.MANIFEST_NAME;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;
import java.util.Collections;
import java.util.List;
import java.util.Set;
import java.util.TreeSet;
import java.util.jar.Manifest;
import org.jboss.logging.Logger;
import org.switchyard.common.CommonCoreLogger;
import org.switchyard.common.type.Classes;
import org.switchyard.common.version.BaseVersionFactory;
import org.switchyard.common.version.Query;
import org.switchyard.common.version.Version;
/**
* The factory for ManifestVersion.
*
* @author David Ward <<a href="mailto:dward@jboss.org">dward@jboss.org</a>> (C) 2012 Red Hat Inc.
*/
public final class ManifestVersionFactory extends BaseVersionFactory {
private static final Logger LOGGER = Logger.getLogger(ManifestVersionFactory.class);
/**
* {@inheritDoc}
*/
@Override
public Set<Version> getVersions(boolean returnFirstOnly, Query... queries) {
List<URL> urls;
try {
urls = Classes.getResources(MANIFEST_NAME, getClass());
} catch (IOException ioe) {
urls = Collections.emptyList();
}
Set<Version> versions = new TreeSet<Version>();
urlLoop: for (URL url : urls) {
InputStream is = null;
try {
URLConnection conn = url.openConnection();
// avoid file-locking on Windows
conn.setUseCaches(false);
is = conn.getInputStream();
Version version = new ManifestVersion(new Manifest(is));
boolean matches = true;
queryLoop: for (Query query : queries) {
if (!query.matches(version)) {
matches = false;
break queryLoop;
}
}
if (matches) {
versions.add(version);
if (returnFirstOnly) {
break urlLoop;
}
}
} catch (IOException ioe) {
CommonCoreLogger.ROOT_LOGGER.problemReadingStream(url.toString(), ioe.getMessage());
} finally {
if (is != null) {
try {
is.close();
} catch (IOException ioe) {
CommonCoreLogger.ROOT_LOGGER.problemClosingStream(url.toString(), ioe.getMessage());
}
}
}
}
return versions;
}
}