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      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 
     21 import dalvik.system.DexClassLoader;
     22 
     23 /**
     24  * Implementation for Dalvik. Uses the DexClassLoader, so we can write
     25  * temporary DEX files to a special directory. We don't want to spoil the
     26  * system's DEX cache with our files. Also, we might not have write access
     27  * to the system's DEX cache at all (which is the case when we're running
     28  * CTS).
     29  */
     30 class Support_ClassLoaderDalvik extends Support_ClassLoader {
     31 
     32     private static File tmp;
     33 
     34     static {
     35         tmp = new File(System.getProperty("java.io.tmpdir"), "dex-cache");
     36         tmp.mkdirs();
     37     }
     38 
     39     @Override
     40     public ClassLoader getClassLoader(URL url, ClassLoader parent) {
     41         return new DexClassLoader(url.getPath(), tmp.getAbsolutePath(),
     42                 null, parent);
     43     }
     44 }
     45