/* | |
* 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.codehaus.groovy.util; | |
import java.io.IOException; | |
import java.io.InputStream; | |
import java.net.URL; | |
import java.net.URLClassLoader; | |
import java.util.Properties; | |
import static org.codehaus.groovy.runtime.DefaultGroovyMethodsSupport.closeQuietly; | |
/** | |
* Exposes the Groovy release information | |
* | |
* @author Roshan Dawrani | |
*/ | |
public class ReleaseInfo { | |
private static final Properties RELEASE_INFO = new Properties(); | |
private static final String RELEASE_INFO_FILE = "META-INF/groovy-release-info.properties"; | |
private static final String KEY_IMPLEMENTATION_VERSION = "ImplementationVersion"; | |
static { | |
URL url = null; | |
ClassLoader cl = ReleaseInfo.class.getClassLoader(); | |
// we need no security check for getting the system class | |
// loader since if we do the invoker has a null loader, | |
// in which case no security check will be done | |
if (cl == null) cl = ClassLoader.getSystemClassLoader(); | |
if (cl instanceof URLClassLoader) { | |
// this avoids going through the parent classloaders/bootstrap | |
url = ((URLClassLoader) cl).findResource(RELEASE_INFO_FILE); | |
} else { | |
// fallback option as ClassLoader#findResource() is protected | |
url = cl.getResource(RELEASE_INFO_FILE); | |
} | |
if (url != null) { | |
InputStream is = null; | |
try { | |
is = url.openStream(); | |
if (is != null) { | |
RELEASE_INFO.load(is); | |
} | |
} catch (IOException ioex) { | |
// ignore. In case of some exception, release info is not available | |
} finally { | |
closeQuietly(is); | |
} | |
} | |
} | |
public static String getVersion() { | |
return get(KEY_IMPLEMENTATION_VERSION); | |
} | |
public static Properties getAllProperties() { | |
return RELEASE_INFO; | |
} | |
private static String get(String propName) { | |
String propValue = RELEASE_INFO.getProperty(propName); | |
return (propValue == null ? "" : propValue); | |
} | |
} |