/*
* (c) Copyright 2010-2011 AgileBirds
*
* This file is part of OpenFlexo.
*
* OpenFlexo is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* OpenFlexo 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with OpenFlexo. If not, see <http://www.gnu.org/licenses/>.
*
*/
package org.openflexo.toolbox;
import java.io.File;
import java.io.FilenameFilter;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Date;
import java.util.Enumeration;
import java.util.List;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* @author Nicolas Daniels
*
*/
public class JavaResourceUtil {
private static final Logger logger = Logger.getLogger(JavaResourceUtil.class.getPackage().getName());
/**
* Retrieve all resources with the specified suffix in the resources where the specified class belongs (from jar or folder).
*
* @param clazz
* : the class belonging to the jar or to the folder denoting a project
* @param suffix
* : the suffix resources must match. If null all resources will be retrieved
* @return the retrieved resource names.
*/
public static List<String> getMatchingResources(Class<?> clazz, String suffix) {
try {
URI uri = clazz.getProtectionDomain().getCodeSource().getLocation().toURI();
File file = new File(uri);
if (file.isDirectory()) {
return getMatchingResourcesFromFolder(new File(uri), suffix);
} else if (file.getName().endsWith(".jar")) {
JarFile jarFile = new JarFile(new File(uri));
try {
return getMatchingResourcesFromJar(jarFile, suffix);
} finally {
try {
if (jarFile != null) {
jarFile.close();
}
} catch (IOException e) {
logger.log(Level.WARNING, "Cannot close jar file '" + jarFile.getName() + "' !", e);
}
}
} else {
logger.log(Level.WARNING, "Cannot handle file type for loading resources !");
}
} catch (URISyntaxException e) {
logger.log(Level.SEVERE, "Cannot load files from jar !", e);
} catch (IOException e) {
logger.log(Level.SEVERE, "Cannot load files from jar !", e);
}
return new ArrayList<String>();
}
/**
* Retrieve all resources with the specified suffix in the jar.
*
* @param jarFile
* : the jar in which search for resources must be performed
* @param suffix
* : the suffix resources must match. If null all resources will be retrieved
* @return the retrieved resource names.
*/
public static List<String> getMatchingResourcesFromJar(JarFile jarFile, String suffix) {
List<String> result = new ArrayList<String>();
Enumeration<JarEntry> entries = jarFile.entries(); // gives ALL entries in jar
while (entries.hasMoreElements()) {
JarEntry entry = entries.nextElement();
if (suffix == null || entry.getName().endsWith(suffix)) {
result.add("/" + entry.getName());
}
}
return result;
}
/**
* Retrieve all resources with the specified suffix in the project folder.
*
* @param folder
* : the folder in which search for resources must be performed
* @param suffix
* : the suffix resources must match. If null all resources will be retrieved
* @return the retrieved resource names.
*/
public static List<String> getMatchingResourcesFromFolder(File folder, final String suffix) {
List<File> files = FileUtils.listFilesRecursively(folder, new FilenameFilter() {
@Override
public boolean accept(File dir, String name) {
return name.endsWith(suffix);
}
});
List<String> result = new ArrayList<String>();
for (File file : files) {
result.add(file.getAbsolutePath().substring(folder.getAbsolutePath().length()).replace('\\', '/'));
}
return result;
}
/**
* Return the last modified date of the specified resource. <br>
* If the resource doesn't exist, null is returned.
*
* @param resourcePath
* @return the last modified date of the specified resource, null if resource doesn't exist.
*/
public static Date getResourceLastModifiedDate(String resourcePath) {
try {
URL url = JavaResourceUtil.class.getResource(resourcePath);
if (url == null) {
return null;
}
return new Date(url.openConnection().getLastModified());
} catch (IOException e) {
logger.log(Level.SEVERE, "Cannot retrieve last modified date for resources '" + resourcePath + "' !");
e.printStackTrace();
return null;
}
}
}