get Manifest - Java Reflection

Java examples for Reflection:Jar

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Description

get Manifest

Demo Code

/**//from w  ww.ja  v a  2 s .  c om
 * Copyright (C) 2012-2013  Du?an Vejnovi??  <vaadin@dussan.org>
 *
 * 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.
 */
import java.io.Serializable;
import java.net.JarURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.util.jar.JarInputStream;
import java.util.jar.Manifest;

public class Main{
    @SuppressWarnings("resource")
    public final static Manifest getManifest() {
        try {
            URL url = ManifestHelper.class.getResource(ManifestHelper.class
                    .getSimpleName() + ".class");
            URLConnection urlConnection = url.openConnection();
            urlConnection.setUseCaches(false);

            if (urlConnection instanceof JarURLConnection) {
                return ((JarURLConnection) urlConnection).getManifest();
            } else {
                Manifest manifest = new JarInputStream(
                        urlConnection.getInputStream()).getManifest();
                if (manifest == null) {
                    String location = url.toExternalForm();
                    location = location.substring(0,
                            location.indexOf("org/server/you") - 1)
                            + "/META-INF/MANIFEST.MF";
                    manifest = new Manifest(new URL(location).openStream());
                }
                return manifest;
            }
        } catch (Exception e) {
            return null;
        }
    }
}

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