src/main/java/org/apache/sling/commons/osgi/bundleversion/FileBundleVersionInfo.java

/*
 * 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.sling.commons.osgi.bundleversion;

import java.io.File;
import java.io.IOException;
import java.util.jar.JarFile;
import java.util.jar.Manifest;

import org.osgi.framework.Constants;
import org.osgi.framework.Version;

/** BundleVersionInfo based on a bundle jar file */
public class FileBundleVersionInfo extends BundleVersionInfo<File> {

    private final String symbolicName;
    private final Version version;
    private final boolean isSnapshot;
    private final long lastModified;
    private final File source;

    public FileBundleVersionInfo(File bundle) throws IOException {
        source = bundle;
        final JarFile f = new JarFile(bundle);
        try {
            final Manifest m = f.getManifest();
            if(m == null) {
                symbolicName = null;
                version = null;
                isSnapshot = false;
                lastModified = BND_LAST_MODIFIED_MISSING;
            } else {
                symbolicName = m.getMainAttributes().getValue(Constants.BUNDLE_SYMBOLICNAME);
                final String v = m.getMainAttributes().getValue(Constants.BUNDLE_VERSION);
                version = v == null ? null : new Version(v);
                isSnapshot = v != null && v.contains(SNAPSHOT_MARKER);
                final String last = m.getMainAttributes().getValue(BND_LAST_MODIFIED);
                long lastMod = BND_LAST_MODIFIED_MISSING;
                if(last != null) {
                    try {
                        lastMod = Long.parseLong(last);
                    } catch(NumberFormatException ignore) {
                    }
                }
                lastModified = lastMod;
            }
        } finally {
            f.close();
        }
    }

    @Override
    public String toString() {
        return getClass().getSimpleName() + " " + source.getAbsolutePath();
    }

    public boolean isBundle() {
        return symbolicName != null;
    }

    public long getBundleLastModified() {
        return lastModified;
    }

    public String getBundleSymbolicName() {
        return symbolicName;
    }

    public File getSource() {
        return source;
    }

    public Version getVersion() {
        return version;
    }

    public boolean isSnapshot() {
        return isSnapshot;
    }
}