| /* |
| * 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.apache.cloudstack.framework.serializer; |
| |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.IOException; |
| import java.net.URL; |
| import java.util.ArrayList; |
| import java.util.Enumeration; |
| import java.util.HashMap; |
| 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.JarInputStream; |
| |
| import org.apache.log4j.Logger; |
| |
| |
| // |
| // Finding classes in a given package code is taken and modified from |
| // Credit: http://internna.blogspot.com/2007/11/java-5-retrieving-all-classes-from.html |
| // |
| public class OnwireClassRegistry { |
| private static final Logger s_logger = Logger.getLogger(OnwireClassRegistry.class); |
| |
| private List<String> packages = new ArrayList<String>(); |
| private final Map<String, Class<?>> registry = new HashMap<String, Class<?>>(); |
| |
| public OnwireClassRegistry() { |
| registry.put("Object", Object.class); |
| } |
| |
| public OnwireClassRegistry(String packageName) { |
| addPackage(packageName); |
| } |
| |
| public OnwireClassRegistry(List<String> packages) { |
| packages.addAll(packages); |
| } |
| |
| public List<String> getPackages() { |
| return packages; |
| } |
| |
| public void setPackages(List<String> packages) { |
| this.packages = packages; |
| } |
| |
| public void addPackage(String packageName) { |
| packages.add(packageName); |
| } |
| |
| public void scan() { |
| Set<Class<?>> classes = new HashSet<Class<?>>(); |
| for (String pkg : packages) { |
| classes.addAll(getClasses(pkg)); |
| } |
| |
| for (Class<?> clz : classes) { |
| OnwireName onwire = clz.getAnnotation(OnwireName.class); |
| if (onwire != null) { |
| assert (onwire.name() != null); |
| |
| registry.put(onwire.name(), clz); |
| } |
| } |
| } |
| |
| public Class<?> getOnwireClass(String onwireName) { |
| return registry.get(onwireName); |
| } |
| |
| static Set<Class<?>> getClasses(String packageName) { |
| ClassLoader loader = Thread.currentThread().getContextClassLoader(); |
| return getClasses(loader, packageName); |
| } |
| |
| // |
| // Following helper methods can be put in a separated helper class, |
| // will do that later |
| // |
| static Set<Class<?>> getClasses(ClassLoader loader, String packageName) { |
| Set<Class<?>> classes = new HashSet<Class<?>>(); |
| String path = packageName.replace('.', '/'); |
| try { |
| Enumeration<URL> resources = loader.getResources(path); |
| if (resources != null) { |
| while (resources.hasMoreElements()) { |
| String filePath = resources.nextElement().getFile(); |
| if (filePath != null) { |
| // WINDOWS HACK |
| if (filePath.indexOf("%20") > 0) |
| filePath = filePath.replace("%20", " "); |
| if ((filePath.indexOf("!") > 0) && (filePath.indexOf(".jar") > 0)) { |
| String jarPath = filePath.substring(0, filePath.indexOf("!")).substring(filePath.indexOf(":") + 1); |
| // WINDOWS HACK |
| if (jarPath.indexOf(":") >= 0) |
| jarPath = jarPath.substring(1); |
| classes.addAll(getFromJARFile(jarPath, path)); |
| } else { |
| classes.addAll(getFromDirectory(new File(filePath), packageName)); |
| } |
| } |
| } |
| } |
| } catch (IOException e) { |
| s_logger.debug("Encountered IOException", e); |
| } catch (ClassNotFoundException e) { |
| s_logger.info("[ignored] class not found", e); |
| } |
| return classes; |
| } |
| |
| static Set<Class<?>> getFromDirectory(File directory, String packageName) throws ClassNotFoundException { |
| Set<Class<?>> classes = new HashSet<Class<?>>(); |
| if (directory.exists()) { |
| for (String file : directory.list()) { |
| if (file.endsWith(".class")) { |
| String name = packageName + '.' + stripFilenameExtension(file); |
| try { |
| Class<?> clazz = Class.forName(name); |
| classes.add(clazz); |
| } catch (ClassNotFoundException e) { |
| s_logger.info("[ignored] class not found in directory " + directory, e); |
| } catch (Exception e) { |
| s_logger.debug("Encountered unexpect exception! ", e); |
| } |
| } else { |
| File f = new File(directory.getPath() + "/" + file); |
| if (f.isDirectory()) { |
| classes.addAll(getFromDirectory(f, packageName + "." + file)); |
| } |
| } |
| } |
| } |
| return classes; |
| } |
| |
| static Set<Class<?>> getFromJARFile(String jar, String packageName) throws IOException, ClassNotFoundException { |
| Set<Class<?>> classes = new HashSet<Class<?>>(); |
| try (JarInputStream jarFile = new JarInputStream(new FileInputStream(jar));) { |
| JarEntry jarEntry; |
| do { |
| jarEntry = jarFile.getNextJarEntry(); |
| if (jarEntry != null) { |
| String className = jarEntry.getName(); |
| if (className.endsWith(".class")) { |
| className = stripFilenameExtension(className); |
| if (className.startsWith(packageName)) { |
| try { |
| Class<?> clz = Class.forName(className.replace('/', '.')); |
| classes.add(clz); |
| } catch (ClassNotFoundException | NoClassDefFoundError e) { |
| s_logger.warn("Unable to load class from jar file", e); |
| } |
| } |
| } |
| } |
| } while (jarEntry != null); |
| return classes; |
| } |
| } |
| |
| static String stripFilenameExtension(String file) { |
| return file.substring(0, file.lastIndexOf('.')); |
| } |
| } |