Members/kono/jpf-core: src/classes/java/lang/ClassLoader.java comparison

comparison src/classes/java/lang/ClassLoader.java @ 0:61d41facf527

initial v8 import (history reset)

author	Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
date	Fri, 23 Jan 2015 10:14:01 -0800
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+:61d41facf527
+/*
+* Copyright (C) 2014, United States Government, as represented by the
+* Administrator of the National Aeronautics and Space Administration.
+* All rights reserved.
+*
+* The Java Pathfinder core (jpf-core) platform is 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.io.IOException;
+import java.io.InputStream;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.nio.ByteBuffer;
+import java.security.ProtectionDomain;
+import java.util.Enumeration;
+import java.util.Vector;
+import sun.misc.CompoundEnumeration;
+/**
+* @author Nastaran Shafiei <nastaran.shafiei@gmail.com>
+*
+*  Model class for java.lang.ClassLoader
+*/
+public abstract class ClassLoader {
+private ClassLoader parent;
+// This is JPF internal identifier which set to the globalId of the classLoader
+private int nativeId;
+//--- internals
+protected ClassLoader() {
+// constructed on the native side
+}
+protected ClassLoader (ClassLoader parent){
+// constructed on the native side
+}
+private native String getResource0 (String rname);
+public URL getResource(String name) {
+URL url = null;
+if(parent == null) {
+String resourcePath = getSystemClassLoader().getResource0(name);
+try {
+url = new URL(resourcePath);
+} catch (MalformedURLException x){
+url = null;
+}
+} else {
+url = parent.getResource(name);
+}
+if (url == null) {
+url = findResource(name);
+}
+return url;
+}
+/**
+* Finds the resource with the given name. Class loader implementations
+* should override this method to specify where to find resources.
+*/
+protected URL findResource(String name) {
+return null;
+}
+private native String[] getResources0 (String rname);
+/**
+* Returns an array of URL including all resources with the given name
+* found in the classpath of this classloader.
+*/
+private Enumeration<URL> getResourcesURL(String name) {
+String[] urls = getResources0(name);
+Vector<URL> list = new Vector<URL>(0);
+for(String url: urls) {
+try {
+list.add(new URL(url));
+} catch (MalformedURLException x){
+// process the rest
+}
+}
+return list.elements();
+}
+@SuppressWarnings({"unchecked","rawtypes"})
+public Enumeration<URL> getResources(String name) throws IOException {
+Enumeration<URL>[] resEnum = new Enumeration[2];
+if(parent == null) {
+resEnum[0] = getSystemClassLoader().getResourcesURL(name);
+} else{
+resEnum[0] = parent.getResources(name);
+}
+resEnum[1] = findResources(name);
+return new CompoundEnumeration<URL>(resEnum);
+}
+/**
+* Returns an enumeration representing all the resources with the given
+* name. Class loader implementations should override this method to
+* specify where to load resources from.
+*/
+protected Enumeration<URL> findResources(String name) throws IOException {
+return (new Vector<URL>()).elements();
+}
+public InputStream getResourceAsStream (String name){
+URL foundResource = getResource(name);
+if (foundResource != null) {
+try {
+return foundResource.openStream();
+} catch (IOException e) {
+System.err.println("cannot open resource " + name);
+}
+}
+return null;
+}
+public native static ClassLoader getSystemClassLoader ();
+public static URL getSystemResource(String name){
+return getSystemClassLoader().getResource(name);
+}
+public static InputStream getSystemResourceAsStream(String name) {
+return getSystemClassLoader().getResourceAsStream(name);
+}
+public static Enumeration<URL> getSystemResources(String name) throws IOException {
+return getSystemClassLoader().getResources(name);
+}
+public ClassLoader getParent() {
+return parent;
+}
+/**
+* If the class with the given name has been already defined, it is returned. OW, it
+* returns null.
+*/
+protected native final Class<?> findLoadedClass(String name);
+protected native final Class<?> findSystemClass(String name) throws ClassNotFoundException;
+public Class<?> loadClass(String name) throws ClassNotFoundException {
+Class<?> c = findLoadedClass(name);
+if(c == null) {
+try {
+if (parent != null && parent != getSystemClassLoader()) {
+c = parent.loadClass(name, false);
+} else {
+c = findSystemClass(name);
+}
+} catch (ClassNotFoundException e) {
+c = findClass(name);
+}
+}
+return c;
+}
+protected Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundException {
+return loadClass(name);
+}
+/**
+* Finds the class with a given name. This method should be overridden by
+* ClassLoader subclasses, and it will be used by loadClass().
+*/
+protected Class<?> findClass(String name) throws ClassNotFoundException {
+throw new ClassNotFoundException(name);
+}
+/**
+* All the class objects are resolved internally by JPF. So this method
+* does nothing.
+*/
+protected final void resolveClass(Class<?> c) {
+}
+private native Class<?> defineClass0(String name, byte[] b, int off, int len);
+protected final Class<?> defineClass(String name, byte[] b, int off, int len) throws ClassFormatError {
+return defineClass0(name, b, off, len);
+}
+protected final Class<?> defineClass(String name, byte[] b, int off, int len, ProtectionDomain protectionDomain) throws ClassFormatError {
+return defineClass(name, b, off, len);
+}
+protected String findLibrary(String libname) {
+return null;
+}
+protected native Package getPackage(String name);
+protected native Package[] getPackages();
+public native void setDefaultAssertionStatus(boolean enabled);
+public native void setClassAssertionStatus(String className, boolean enabled);
+public native void setPackageAssertionStatus(String packageName, boolean enabled);
+public native void clearAssertionStatus();
+//--- unsupported methods
+protected static boolean registerAsParallelCapable() {
+return true; // dummy, in prep for jdk7
+}
+protected Object getClassLoadingLock(String className) {
+throw new UnsupportedOperationException();
+}
+protected final Class<?> defineClass(byte[] b, int off, int len)
+throws ClassFormatError {
+throw new UnsupportedOperationException();
+}
+protected final Class<?> defineClass(String name, ByteBuffer b, ProtectionDomain protectionDomain)
+throws ClassFormatError {
+throw new UnsupportedOperationException();
+}
+protected final void setSigners(Class<?> c, Object[] signers) {
+throw new UnsupportedOperationException();
+}
+protected Package definePackage(String name, String specTitle, String specVersion,
+String specVendor, String implTitle, String implVersion,
+String implVendor, URL sealBase)
+throws IllegalArgumentException {
+throw new UnsupportedOperationException();
+}
+}

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comparison src/classes/java/lang/ClassLoader.java @ 0:61d41facf527