Java Jar Manifest getManifestValue(JarFile jarFile, String key, String defaultValue)

Description

get Manifest Value

License

Apache License

Declaration

public static String getManifestValue(JarFile jarFile, String key, String defaultValue) 

Method Source Code

//package com.java2s;
/*//from w ww .jav  a  2  s  . co  m
 * Copyright 2018 NAVER Corp.
 *
 * 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.IOException;
import java.util.jar.Attributes;
import java.util.jar.JarFile;
import java.util.jar.Manifest;

public class Main {
    public static String getManifestValue(JarFile jarFile, String key, String defaultValue) {
        final Manifest manifest = getManifest(jarFile);
        if (manifest == null) {
            return defaultValue;
        }

        final Attributes attributes = manifest.getMainAttributes();
        final String value = attributes.getValue(key);
        if (value == null) {
            return defaultValue;
        }
        return value;
    }

    public static Manifest getManifest(JarFile pluginJarFile) {
        try {
            return pluginJarFile.getManifest();
        } catch (IOException ex) {
            return null;
        }
    }
}

Related

1. getManifestPath(String moduleDir)
2. getManifestProperty(ClassLoader clContainingManifest, String manifestKey)
3. getManifestProperty(File file, String name)
4. getManifestProperty(Manifest manifest, String propertyName)
5. getManifestValue(File jarFile, String key)
6. getManifestVersionNumber(File file)
7. getValueFromAttr(Attributes attributes, String manifestValue)
8. isOSGiManifest(Manifest manifest)
9. manifestToProperties(Attributes d)