| /** |
| * 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.tajo.util; |
| |
| import org.apache.commons.collections.Predicate; |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.tajo.annotation.Nullable; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.util.Enumeration; |
| import java.util.HashSet; |
| import java.util.Set; |
| import java.util.jar.JarEntry; |
| import java.util.jar.JarFile; |
| |
| public abstract class ClassUtil { |
| private static final Log LOG = LogFactory.getLog(ClassUtil.class); |
| |
| public static Set<Class> findClasses(@Nullable Class targetClass, String packageFilter) { |
| return findClasses(targetClass, packageFilter, null); |
| } |
| |
| public static Set<Class> findClasses(@Nullable Class targetClass, String packageFilter, Predicate predicate) { |
| Set<Class> classSet = new HashSet<>(); |
| |
| String classpath = System.getProperty("java.class.path"); |
| String[] paths = classpath.split(System.getProperty("path.separator")); |
| |
| for (String path : paths) { |
| File file = new File(path); |
| if (file.exists()) { |
| findClasses(classSet, file, file, true, targetClass, packageFilter, predicate); |
| } |
| } |
| |
| return classSet; |
| } |
| |
| private static void findClasses(Set<Class> matchedClassSet, File root, File file, boolean includeJars, |
| @Nullable Class type, String packageFilter, @Nullable Predicate predicate) { |
| if (file.isDirectory()) { |
| File[] children = file.listFiles(); |
| if (children != null) { |
| for (File child : children) { |
| findClasses(matchedClassSet, root, child, includeJars, type, packageFilter, predicate); |
| } |
| } |
| } else { |
| if (file.getName().toLowerCase().endsWith(".jar") && includeJars) { |
| JarFile jar = null; |
| try { |
| jar = new JarFile(file); |
| } catch (Exception ex) { |
| LOG.error(ex.getMessage(), ex); |
| return; |
| } |
| Enumeration<JarEntry> entries = jar.entries(); |
| while (entries.hasMoreElements()) { |
| JarEntry entry = entries.nextElement(); |
| String name = entry.getName(); |
| int extIndex = name.lastIndexOf(".class"); |
| if (extIndex > 0) { |
| String qualifiedClassName = name.substring(0, extIndex).replace("/", "."); |
| if (qualifiedClassName.indexOf(packageFilter) >= 0 && !isTestClass(qualifiedClassName)) { |
| try { |
| Class clazz = Class.forName(qualifiedClassName); |
| |
| if (isMatched(clazz, type, predicate)) { |
| matchedClassSet.add(clazz); |
| } |
| } catch (ClassNotFoundException e) { |
| LOG.error(e.getMessage(), e); |
| } |
| } |
| } |
| } |
| |
| try { |
| jar.close(); |
| } catch (IOException e) { |
| LOG.warn("Closing " + file.getName() + " was failed."); |
| } |
| } else if (file.getName().toLowerCase().endsWith(".class")) { |
| String qualifiedClassName = createClassName(root, file); |
| if (qualifiedClassName.indexOf(packageFilter) >= 0 && !isTestClass(qualifiedClassName)) { |
| try { |
| Class clazz = Class.forName(qualifiedClassName); |
| if (isMatched(clazz, type, predicate)) { |
| matchedClassSet.add(clazz); |
| } |
| } catch (ClassNotFoundException e) { |
| LOG.error(e.getMessage(), e); |
| } |
| } |
| } |
| } |
| } |
| |
| private static boolean isMatched(Class clazz, Class targetClass, Predicate predicate) { |
| return |
| !clazz.isInterface() && |
| (targetClass == null || isClassMatched(targetClass, clazz)) && |
| (predicate == null || predicate.evaluate(clazz)); |
| } |
| |
| private static boolean isTestClass(String qualifiedClassName) { |
| String className = getSimpleClassName(qualifiedClassName); |
| if(className == null) { |
| return false; |
| } |
| |
| return className.startsWith("Test"); |
| } |
| |
| private static boolean isClassMatched(Class targetClass, Class loadedClass) { |
| if (targetClass.equals(loadedClass)) { |
| return true; |
| } |
| |
| Class[] classInterfaces = loadedClass.getInterfaces(); |
| if (classInterfaces != null) { |
| for (Class eachInterfaceClass : classInterfaces) { |
| if (eachInterfaceClass.equals(targetClass)) { |
| return true; |
| } |
| |
| if (isClassMatched(targetClass, eachInterfaceClass)) { |
| return true; |
| } |
| } |
| } |
| |
| Class superClass = loadedClass.getSuperclass(); |
| if (superClass != null) { |
| if (isClassMatched(targetClass, superClass)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| private static String getSimpleClassName(String qualifiedClassName) { |
| String[] tokens = qualifiedClassName.split("\\."); |
| if (tokens.length == 0) { |
| return qualifiedClassName; |
| } |
| return tokens[tokens.length - 1]; |
| } |
| |
| private static String createClassName(File root, File file) { |
| StringBuffer sb = new StringBuffer(); |
| String fileName = file.getName(); |
| sb.append(fileName.substring(0, fileName.lastIndexOf(".class"))); |
| file = file.getParentFile(); |
| while (file != null && !file.equals(root)) { |
| sb.insert(0, '.').insert(0, file.getName()); |
| file = file.getParentFile(); |
| } |
| return sb.toString(); |
| } |
| |
| public static Class<?> forName(String name) throws ClassNotFoundException { |
| if (name.equals("byte")) { |
| return byte.class; |
| } |
| if (name.equals("short")) { |
| return short.class; |
| } |
| if (name.equals("int")) { |
| return int.class; |
| } |
| if (name.equals("long")) { |
| return long.class; |
| } |
| if (name.equals("char")) { |
| return char.class; |
| } |
| if (name.equals("float")) { |
| return float.class; |
| } |
| if (name.equals("double")) { |
| return double.class; |
| } |
| if (name.equals("boolean")) { |
| return boolean.class; |
| } |
| if (name.equals("void")) { |
| return void.class; |
| } |
| |
| return Class.forName(name); |
| } |
| } |