| /* |
| * Copyright (C) 2007 The Android Open Source Project |
| * |
| * Licensed 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 java.lang; |
| |
| import java.net.MalformedURLException; |
| import java.net.URL; |
| import java.security.ProtectionDomain; |
| import java.util.ArrayList; |
| import java.util.Enumeration; |
| import java.util.NoSuchElementException; |
| |
| class VMClassLoader { |
| |
| /** |
| * Get a resource from a file in the bootstrap class path. |
| * |
| * It would be simpler to just walk through the class path elements |
| * ourselves, but that would require reopening Jar files. |
| * |
| * We assume that the bootclasspath can't change once the VM has |
| * started. This assumption seems to be supported by the spec. |
| */ |
| static URL getResource(String name) { |
| int numEntries = getBootClassPathSize(); |
| int i; |
| |
| for (i = 0; i < numEntries; i++) { |
| String urlStr = getBootClassPathResource(name, i); |
| if (urlStr != null) { |
| try { |
| return new URL(urlStr); |
| } |
| catch (MalformedURLException mue) { |
| mue.printStackTrace(); |
| // unexpected; keep going |
| } |
| } |
| } |
| |
| return null; |
| } |
| |
| /* |
| * Get an enumeration with all matching resources. |
| */ |
| static Enumeration<URL> getResources(String name) { |
| ArrayList<URL> list = null; |
| int numEntries = getBootClassPathSize(); |
| int i; |
| |
| for (i = 0; i < numEntries; i++) { |
| String urlStr = getBootClassPathResource(name, i); |
| if (urlStr != null) { |
| if (list == null) |
| list = new ArrayList<URL>(); |
| |
| try { |
| list.add(new URL(urlStr)); |
| } |
| catch (MalformedURLException mue) { |
| mue.printStackTrace(); |
| // unexpected; keep going |
| } |
| } |
| } |
| |
| if (list == null) |
| return null; |
| else |
| return new EnumerateListArray<URL>(list); |
| } |
| |
| /** |
| * Load class with bootstrap class loader. |
| */ |
| native static Class loadClass(String name, boolean resolve) |
| throws ClassNotFoundException; |
| |
| native static Class getPrimitiveClass(char type); |
| |
| /* |
| * TODO(Google) Ticket 156: Native implementation does nothing, just throws |
| * OperationNotSupportedException. |
| */ |
| native static Class defineClass(ClassLoader cl, String name, |
| byte[] data, int offset, int len, ProtectionDomain pd) |
| throws ClassFormatError; |
| |
| /* |
| * TODO(Google) Ticket 156: Native implementation does nothing, just throws |
| * OperationNotSupportedException. |
| */ |
| native static Class defineClass(ClassLoader cl, |
| byte[] data, int offset, int len, ProtectionDomain pd) |
| throws ClassFormatError; |
| |
| native static Class findLoadedClass(ClassLoader cl, String name); |
| |
| /** |
| * Boot class path manipulation, for getResources(). |
| */ |
| native private static int getBootClassPathSize(); |
| native private static String getBootClassPathResource(String name, |
| int index); |
| |
| /* |
| * Create an Enumeration for an ArrayList. |
| */ |
| private static class EnumerateListArray<T> implements Enumeration<T> { |
| private final ArrayList mList; |
| private int i = 0; |
| |
| EnumerateListArray(ArrayList list) { |
| mList = list; |
| } |
| |
| public boolean hasMoreElements() { |
| return i < mList.size(); |
| } |
| |
| public T nextElement() { |
| if (i >= mList.size()) |
| throw new NoSuchElementException(); |
| return (T) mList.get(i++); |
| } |
| }; |
| } |
| |