/*
* SonarQube
* Copyright (C) 2009-2017 SonarSource SA
* mailto:info AT sonarsource DOT com
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package org.sonar.api.utils;
import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import java.util.jar.Attributes;
import java.util.jar.Manifest;
/**
* @since 2.2
*/
public final class ManifestUtils {
private ManifestUtils() {
}
/**
* Search for a property in all the manifests found in the classloader
*
* @return the values, an empty list if the property is not found.
*/
public static List<String> getPropertyValues(ClassLoader classloader, String key) {
List<String> values = new ArrayList<>();
try {
Enumeration<URL> resources = classloader.getResources("META-INF/MANIFEST.MF");
while (resources.hasMoreElements()) {
Manifest manifest = new Manifest(resources.nextElement().openStream());
Attributes attributes = manifest.getMainAttributes();
String value = attributes.getValue(key);
if (value != null) {
values.add(value);
}
}
} catch (IOException e) {
throw new SonarException("Fail to load manifests from classloader: " + classloader, e);
}
return values;
}
}