Java tutorial
/* * (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.foundation.dm; import java.io.File; import java.io.IOException; import java.util.ArrayList; import java.util.Date; import java.util.Enumeration; import java.util.HashSet; import java.util.List; import java.util.Map; import java.util.Set; import java.util.jar.JarEntry; import java.util.jar.JarFile; import java.util.jar.Manifest; import java.util.logging.Level; import java.util.logging.Logger; import org.openflexo.foundation.FlexoException; import org.openflexo.foundation.rm.FlexoJarResource; import org.openflexo.foundation.rm.FlexoProject; import org.openflexo.foundation.rm.FlexoResource; import org.openflexo.foundation.rm.ImportedResourceData; import org.openflexo.foundation.rm.RMNotification; import org.openflexo.foundation.rm.SaveResourceException; import org.openflexo.foundation.utils.FlexoProgress; import org.openflexo.localization.FlexoLocalization; import com.google.common.base.Predicate; import com.google.common.collect.Maps; /** * Please comment this class * * @author sguerin * */ public class JarLoader implements ImportedResourceData { static final Logger logger = Logger.getLogger(JarLoader.class.getPackage().getName()); JarFile jarFile; private Manifest manifest; Set<String> classNames = new HashSet<String>(); private JarClassLoader classLoader; private FlexoJarResource _jarResource; private final FlexoProject project; ExternalRepository getJarRepository() { if (_jarResource != null) { return _jarResource.getJarRepository(); } return null; } public JarLoader(File aJarFile, FlexoJarResource jarResource, FlexoProject project) { this(aJarFile, jarResource != null ? jarResource.getJarRepository() : null, jarResource, project, null); } public JarLoader(File aJarFile, ExternalRepository jarRepository, FlexoProject project) { this(aJarFile, jarRepository, jarRepository != null ? jarRepository.getJarResource() : null, project, null); } public JarLoader(File aJarFile, FlexoJarResource jarResource, FlexoProject project, FlexoProgress progress) { this(aJarFile, jarResource != null ? jarResource.getJarRepository() : null, jarResource, project, progress); } public JarLoader(File aJarFile, ExternalRepository jarRepository, FlexoProject project, FlexoProgress progress) { this(aJarFile, jarRepository, jarRepository != null ? jarRepository.getJarResource() : null, project, progress); } private JarLoader(File aJarFile, ExternalRepository jarRepository, FlexoJarResource jarResource, FlexoProject project, FlexoProgress progress) { super(); _jarResource = jarResource; this.project = project; classLoader = getProject().getJarClassLoader(); try { jarFile = new JarFile(aJarFile); if (logger.isLoggable(Level.INFO)) { logger.info("Loading jar file " + aJarFile.getAbsolutePath()); } manifest = jarFile.getManifest(); loadJarFile(progress); } catch (IOException e) { if (logger.isLoggable(Level.WARNING)) { logger.warning("Could not open file " + aJarFile.getAbsolutePath()); } } } public void delete() { if (classLoader != null) { // Actually I don't think this is needed as the deletion of the LoadableDMEntities should already do that // But let's just be sure. classLoader.unloadClasses(new ArrayList<String>(classNames)); } classNames = null; _jarResource = null; classLoader = null; jarFile = null; manifest = null; } public boolean contains(String className) { return getContainedClasses().containsKey(className); } public Map<String, Class<?>> getContainedClasses() { return Maps.filterKeys(classLoader.getClassForClassName(), new Predicate<String>() { @Override public boolean apply(String input) { return classNames.contains(input); } }); } public Class<?> getClassForName(String aName) { return getContainedClasses().get(aName); } private void loadJarFile(FlexoProgress progress) { logger.info("**************** load JAR file " + jarFile.getName()); if (logger.isLoggable(Level.FINE)) { logger.fine("Manifest: " + manifest + "\n" + manifest.getEntries()); } if (progress != null) { progress.setProgress(FlexoLocalization.localizedForKey("loading_class_definitions")); progress.resetSecondaryProgress(jarFile.size()); } List<JarEntry> jarEntries = new ArrayList<JarEntry>(); for (Enumeration<JarEntry> en = jarFile.entries(); en.hasMoreElements();) { JarEntry entry = en.nextElement(); if (progress != null) { progress.setSecondaryProgress( FlexoLocalization.localizedForKey("loading_and_parsing") + " " + entry.getName()); } if (isClassFile(entry.getName())) { jarEntries.add(entry); } else { if (logger.isLoggable(Level.FINE)) { logger.fine("Entry " + entry.getName()); } } } int i = 0; for (JarEntry entry : jarEntries) { Class<?> loadedClass = classLoader.findClass(jarFile, entry); if (loadedClass != null) { classNames.add(loadedClass.getName()); i++; if (logger.isLoggable(Level.FINE)) { logger.fine("Loaded " + loadedClass.getName()); } } } if (logger.isLoggable(Level.INFO)) { logger.info("Loaded " + i + " classes."); } } boolean isClassFile(String jarentryname) { return jarentryname.endsWith(".class") && !jarentryname.startsWith("WebServerResources/"); } public FlexoJarResource getJarResource() { return _jarResource; } @Override public FlexoJarResource getFlexoResource() { return getJarResource(); } @Override public void setFlexoResource(FlexoResource resource) { _jarResource = (FlexoJarResource) resource; } @Override public FlexoProject getProject() { return project; } // Degager tout ce qu'il y a en dessous public void save() throws SaveResourceException { // TODO Auto-generated method stub } public void setIsModified() { // TODO Auto-generated method stub } public void clearIsModified() { // TODO Auto-generated method stub } public boolean isModified() { // TODO Auto-generated method stub return false; } public Date lastMemoryUpdate() { // TODO Auto-generated method stub return null; } public void notifyRM(RMNotification notification) throws FlexoException { // TODO Auto-generated method stub } public void receiveRMNotification(RMNotification notification) throws FlexoException { // TODO Auto-generated method stub } /*public ExternalRepository getJarRepository() { return _jarRepository; }*/ }