1 /* 2 * Copyright (C) 2009 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package tests.support; 17 18 import java.io.File; 19 import java.net.URL; 20 import java.net.URLClassLoader; 21 22 import dalvik.system.DexClassLoader; 23 24 /** 25 * Support class for creating a file-based ClassLoader. Delegates to either 26 * Dalvik's PathClassLoader or the RI's URLClassLoader, but does so by-name. 27 * This allows us to run corresponding tests in both environments. 28 */ 29 public abstract class Support_ClassLoader { 30 31 public abstract ClassLoader getClassLoader(URL url, ClassLoader parent); 32 33 public static ClassLoader getInstance(URL url, ClassLoader parent) { 34 try { 35 Support_ClassLoader factory; 36 37 if ("Dalvik".equals(System.getProperty("java.vm.name"))) { 38 factory = (Support_ClassLoader)Class.forName( 39 "tests.support.Support_ClassLoader$Dalvik").newInstance(); 40 } else { 41 factory = (Support_ClassLoader)Class.forName( 42 "tests.support.Support_ClassLoader$RefImpl").newInstance(); 43 } 44 45 return factory.getClassLoader(url, parent); 46 } catch (Exception ex) { 47 throw new RuntimeException("Unable to create ClassLoader", ex); 48 } 49 } 50 51 /** 52 * Implementation for Dalvik. Uses the DexClassLoader, so we can write 53 * temporary DEX files to a special directory. We don't want to spoil the 54 * system's DEX cache with our files. Also, we might not have write access 55 * to the system's DEX cache at all (which is the case when we're running 56 * CTS). 57 */ 58 static class Dalvik extends Support_ClassLoader { 59 60 private static File tmp; 61 62 static { 63 tmp = new File(System.getProperty("java.io.tmpdir"), "dex-cache"); 64 tmp.mkdirs(); 65 } 66 67 @Override 68 public ClassLoader getClassLoader(URL url, ClassLoader parent) { 69 return new DexClassLoader(url.getPath(), tmp.getAbsolutePath(), 70 null, parent); 71 } 72 } 73 74 /** 75 * Implementation for the reference implementation. Nothing interesting to 76 * see here. Please get along. 77 */ 78 static class RefImpl extends Support_ClassLoader { 79 @Override 80 public ClassLoader getClassLoader(URL url, ClassLoader parent) { 81 return new URLClassLoader(new URL[] { url }, parent); 82 } 83 } 84 } 85