73 lines
2.3 KiB
Java
73 lines
2.3 KiB
Java
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/*
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* Copyright (C) 2006 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.app;
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import dalvik.system.PathClassLoader;
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import java.util.HashMap;
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import java.util.Map;
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class ApplicationLoaders
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{
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public static ApplicationLoaders getDefault()
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{
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return gApplicationLoaders;
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}
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public ClassLoader getClassLoader(String zip, String libPath, ClassLoader parent)
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{
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/*
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* This is the parent we use if they pass "null" in. In theory
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* this should be the "system" class loader; in practice we
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* don't use that and can happily (and more efficiently) use the
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* bootstrap class loader.
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*/
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ClassLoader baseParent = ClassLoader.getSystemClassLoader().getParent();
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synchronized (mLoaders) {
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if (parent == null) {
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parent = baseParent;
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}
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/*
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* If we're one step up from the base class loader, find
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* something in our cache. Otherwise, we create a whole
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* new ClassLoader for the zip archive.
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*/
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if (parent == baseParent) {
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ClassLoader loader = mLoaders.get(zip);
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if (loader != null) {
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return loader;
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}
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PathClassLoader pathClassloader =
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new PathClassLoader(zip, libPath, parent);
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mLoaders.put(zip, pathClassloader);
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return pathClassloader;
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}
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return new PathClassLoader(zip, parent);
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}
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}
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private final Map<String, ClassLoader> mLoaders = new HashMap<String, ClassLoader>();
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private static final ApplicationLoaders gApplicationLoaders
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= new ApplicationLoaders();
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}
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