/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.net;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FilePermission;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.security.AccessControlContext;
import java.security.AccessController;
import java.security.CodeSource;
import java.security.PermissionCollection;
import java.security.PrivilegedAction;
import java.security.SecureClassLoader;
import java.security.cert.Certificate;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Hashtable;
import java.util.IdentityHashMap;
import java.util.List;
import java.util.ListIterator;
import java.util.Map;
import java.util.Set;
import java.util.StringTokenizer;
import java.util.Vector;
import java.util.jar.Attributes;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
import java.util.jar.Manifest;
import java.util.zip.ZipEntry;
import org.apache.harmony.luni.util.InvalidJarIndexException;
import org.apache.harmony.luni.util.Msg;
/**
* This class loader is responsible for loading classes and resources from a
* list of URLs which can refer to either directories or JAR files. Classes
* loaded by this {@code URLClassLoader} are granted permission to access the
* URLs contained in the URL search list.
*
* @since Android 1.0
*/
public class URLClassLoader extends SecureClassLoader {
private static URL[] NO_PATH = new URL[0];
@SuppressWarnings("unchecked")
private static <K, V> Hashtable<K, V>[] newHashtableArray(int size) {
return new Hashtable[size];
}
URL[] urls, orgUrls;
Set<URL> invalidUrls = Collections.synchronizedSet(new HashSet<URL>());
private Map<URL, JarFile> resCache =
Collections.synchronizedMap(new IdentityHashMap<URL, JarFile>(32));
private Object lock = new Object();
private URLStreamHandlerFactory factory;
HashMap<URL, URL[]> extensions;
Hashtable<String, URL[]>[] indexes;
private AccessControlContext currentContext;
static class SubURLClassLoader extends URLClassLoader {
// The subclass that overwrites the loadClass() method
private boolean checkingPackageAccess = false;
SubURLClassLoader(URL[] urls) {
super(urls, ClassLoader.getSystemClassLoader());
}
SubURLClassLoader(URL[] urls, ClassLoader parent) {
super(urls, parent);
}
/**
* Overrides the {@code loadClass()} of {@code ClassLoader}. It calls
* the security manager's {@code checkPackageAccess()} before
* attempting to load the class.
*
* @return the Class object.
* @param className
* String the name of the class to search for.
* @param resolveClass
* boolean indicates if class should be resolved after
* loading.
* @throws ClassNotFoundException
* If the class could not be found.
*/
@Override
protected synchronized Class<?> loadClass(String className,
boolean resolveClass) throws ClassNotFoundException {
SecurityManager sm = System.getSecurityManager();
if (sm != null && !checkingPackageAccess) {
int index = className.lastIndexOf('.');
if (index > 0) { // skip if class is from a default package
try {
checkingPackageAccess = true;
sm.checkPackageAccess(className.substring(0, index));
} finally {
checkingPackageAccess = false;
}
}
}
return super.loadClass(className, resolveClass);
}
}
/**
* Constructs a new {@code URLClassLoader} instance. The newly created
* instance will have the system ClassLoader as its parent. URLs that end
* with "/" are assumed to be directories, otherwise they are assumed to be
* JAR files.
*
* @param urls
* the list of URLs where a specific class or file could be
* found.
* @throws SecurityException
* if a security manager exists and its {@code
* checkCreateClassLoader()} method doesn't allow creation of
* new ClassLoaders.
* @since Android 1.0
*/
public URLClassLoader(URL[] urls) {
this(urls, ClassLoader.getSystemClassLoader(), null);
}
/**
* Constructs a new URLClassLoader instance. The newly created instance will
* have the system ClassLoader as its parent. URLs that end with "/" are
* assumed to be directories, otherwise they are assumed to be JAR files.
*
* @param urls
* the list of URLs where a specific class or file could be
* found.
* @param parent
* the class loader to assign as this loader's parent.
* @throws SecurityException
* if a security manager exists and its {@code
* checkCreateClassLoader()} method doesn't allow creation of
* new class loaders.
* @since Android 1.0
*/
public URLClassLoader(URL[] urls, ClassLoader parent) {
this(urls, parent, null);
}
/**
* Adds the specified URL to the search list.
*
* @param url
* the URL which is to add.
* @since Android 1.0
*/
protected void addURL(URL url) {
try {
URL search = createSearchURL(url);
urls = addURL(urls, search);
orgUrls = addURL(orgUrls, url);
synchronized (extensions) {
extensions.put(search, null);
}
} catch (MalformedURLException e) {
}
}
/**
* Returns an array with the given URL added to the given array.
*
* @param urlArray
* {@code java.net.URL[]} the source array
* @param url
* {@code java.net.URL} the URL to be added
* @return java.net.URL[] an array made of the given array and the new URL
*/
URL[] addURL(URL[] urlArray, URL url) {
URL[] newPath = new URL[urlArray.length + 1];
System.arraycopy(urlArray, 0, newPath, 0, urlArray.length);
newPath[urlArray.length] = url;
Hashtable<String, URL[]>[] newIndexes = newHashtableArray(indexes.length + 1);
System.arraycopy(indexes, 0, newIndexes, 0, indexes.length);
indexes = newIndexes;
return newPath;
}
/**
* Returns all known URLs which point to the specified resource.
*
* @param name
* the name of the requested resource.
* @return the enumeration of URLs which point to the specified resource.
* @throws IOException
* if an I/O error occurs while attempting to connect.
* @since Android 1.0
*/
@Override
public Enumeration<URL> findResources(final String name) throws IOException {
if (name == null) {
return null;
}
Vector<URL> result = AccessController.doPrivileged(
new PrivilegedAction<Vector<URL>>() {
public Vector<URL> run() {
return findResources(urls, name, new Vector<URL>());
}
}, currentContext);
SecurityManager sm;
int length = result.size();
if (length > 0 && (sm = System.getSecurityManager()) != null) {
Vector<URL> reduced = new Vector<URL>(length);
for (int i = 0; i < length; i++) {
URL url = result.elementAt(i);
try {
sm.checkPermission(url.openConnection().getPermission());
reduced.addElement(url);
} catch (IOException e) {
} catch (SecurityException e) {
}
}
result = reduced;
}
return result.elements();
}
/**
* Returns a Vector of URLs among the given ones that contain the specified
* resource.
*
* @return Vector the enumeration of URLs that contain the specified
* resource.
* @param searchURLs
* {@code java.net.URL[]} the array to be searched.
* @param name
* {@code java.lang.String} the name of the requested resource.
*/
Vector<URL> findResources(URL[] searchURLs, String name, Vector<URL> result) {
boolean findInExtensions = searchURLs == urls;
for (int i = 0; i < searchURLs.length; i++) {
if (!invalidUrls.contains(searchURLs[i])) {
URL[] search = new URL[] { searchURLs[i] };
URL res = findResourceImpl(search, name);
if (!invalidUrls.contains(search[0])) {
if (res != null && !result.contains(res)) {
result.addElement(res);
}
if (findInExtensions) {
findInExtensions(explore(searchURLs[i], i), name, i,
result, false);
}
}
}
}
return result;
}
/**
* Returns an {@code Object[]} containing a class, a URL, and a vector of
* URLs, two of which are {@code null}, according to the caller, which is
* identified by the {@code int} type.
*
* @return Object[] a 3-element array : {Class, URL, Vector}. The non-null
* element contains the resource(s) found, which are searched in in
* {@code indexes[i]}.
* @param i
* the index of 'indexes' array to use.
* @param name
* the resource to look for : either a resource or a class.
* @param resources
* {@code boolean} indicates that a vector of URL should be
* returned as the non {@code null} element in {@code Object[]}.
* @param url
* if {@code true} a URL should be returned as the non-null
* element, if {@code false} a class should be returned.
*/
Object findInIndex(int i, String name, Vector<URL> resources, boolean url) {
Hashtable<String, URL[]> index = indexes[i];
if (index != null) {
int pos = name.lastIndexOf("/"); //$NON-NLS-1$
// only keep the directory part of the resource
// as index.list only keeps track of directories and root files
String indexedName = (pos > 0) ? name.substring(0, pos) : name;
URL[] jarURLs;
if (resources != null) {
jarURLs = index.get(indexedName);
if (jarURLs != null) {
findResources(jarURLs, name, resources);
}
} else if (url) {
jarURLs = index.get(indexedName);
if (jarURLs != null) {
return findResourceImpl(jarURLs, name);
}
} else {
String clsName = name;
String partialName = clsName.replace('.', '/');
int position;
if ((position = partialName.lastIndexOf('/')) != -1) {
String packageName = partialName.substring(0, position);
jarURLs = index.get(packageName);
} else {
String className = partialName.substring(0, partialName
.length())
+ ".class"; //$NON-NLS-1$
jarURLs = index.get(className);
}
if (jarURLs != null) {
Class<?> c = findClassImpl(jarURLs, clsName);
// InvalidJarException is thrown when a mapping for a class
// is not valid, i.e. we can't find the class by following
// the mapping.
if (c == null) {
throw new InvalidJarIndexException();
}
return c;
}
}
}
return null;
}
/**
* Returns an {@code Object[]} containing a Class, a URL, and a Vector of
* URLs, two of which are {@code null}, according to the caller, which is
* identified by the {@code int} type.
*
* @return Object[] a 3-element array : {Class, URL, Vector}. The non-null
* element contains the resource(s) found, which are searched in
* newExtensions.
* @param newExtensions
* URL[] the URLs to look in for.
* @param name
* the resource to look for : either a resource or a class.
* @param i
* the index of 'indexes' array to use.
* @param resources
* indicates that a Vector of URL should be returned as the
* non-null element in {@code Object[]}.
* @param url
* if {@code true} a URL should be returned as the non-null
* element, if {@code false} a class should be returned.
*/
Object findInExtensions(URL[] newExtensions, String name, int i,
Vector<URL> resources, boolean url) {
if (newExtensions != null) {
for (int k = 0; k < newExtensions.length; k++) {
if (newExtensions[k] != null) {
URL[] search = new URL[] { newExtensions[k] };
if (resources != null) {
URL res = findResourceImpl(search, name);
if (!invalidUrls.contains(search[0])) { // the URL does
// not exist
if (res != null && !resources.contains(res)) {
resources.addElement(res);
}
findInExtensions(explore(newExtensions[k], i),
name, i, resources, url);
}
} else {
Object result;
if (url) {
result = findResourceImpl(search, name);
} else {
result = findClassImpl(search, name);
}
if (result != null) {
return result;
}
if (!invalidUrls.contains(search[0])) { // the URL
// exists
result = findInExtensions(explore(newExtensions[k],
i), name, i, null, url);
if (result != null) {
return result;
}
}
}
}
}
} else {
try {
return findInIndex(i, name, resources, url);
} catch (InvalidJarIndexException ex) {
// Ignore misleading/wrong jar index
return null;
}
}
return null;
}
/**
* Converts an input stream into a byte array.
*
* @return byte[] the byte array
* @param is
* the input stream
*/
private static byte[] getBytes(InputStream is, boolean readAvailable)
throws IOException {
if (readAvailable) {
byte[] buf = new byte[is.available()];
is.read(buf, 0, buf.length);
is.close();
return buf;
}
byte[] buf = new byte[4096];
int size = is.available();
if (size < 1024) {
size = 1024;
}
ByteArrayOutputStream bos = new ByteArrayOutputStream(size);
int count;
while ((count = is.read(buf)) > 0) {
bos.write(buf, 0, count);
}
return bos.toByteArray();
}
/**
* Gets all permissions for the specified {@code codesource}. First, this
* method retrieves the permissions from the system policy. If the protocol
* is "file:/" then a new permission, {@code FilePermission}, granting the
* read permission to the file is added to the permission collection.
* Otherwise, connecting to and accepting connections from the URL is
* granted.
*
* @param codesource
* the code source object whose permissions have to be known.
* @return the list of permissions according to the code source object.
* @since Android 1.0
*/
@Override
protected PermissionCollection getPermissions(final CodeSource codesource) {
PermissionCollection pc = super.getPermissions(codesource);
URL u = codesource.getLocation();
if (u.getProtocol().equals("jar")) { //$NON-NLS-1$
try {
// Create a URL for the resource the jar refers to
u = ((JarURLConnection) u.openConnection()).getJarFileURL();
} catch (IOException e) {
// This should never occur. If it does continue using the jar
// URL
}
}
if (u.getProtocol().equals("file")) { //$NON-NLS-1$
String path = u.getFile();
String host = u.getHost();
if (host != null && host.length() > 0) {
path = "//" + host + path; //$NON-NLS-1$
}
if (File.separatorChar != '/') {
path = path.replace('/', File.separatorChar);
}
if (isDirectory(u)) {
pc.add(new FilePermission(path + "-", "read")); //$NON-NLS-1$ //$NON-NLS-2$
} else {
pc.add(new FilePermission(path, "read")); //$NON-NLS-1$
}
} else {
String host = u.getHost();
if (host.length() == 0) {
host = "localhost"; //$NON-NLS-1$
}
pc.add(new SocketPermission(host, "connect, accept")); //$NON-NLS-1$
}
return pc;
}
/**
* Returns the search list of this {@code URLClassLoader}.
*
* @return the list of all known URLs of this instance.
* @since Android 1.0
*/
public URL[] getURLs() {
return orgUrls.clone();
}
/**
* Determines if the URL is pointing to a directory.
*/
private static boolean isDirectory(URL url) {
String file = url.getFile();
return (file.length() > 0 && file.charAt(file.length() - 1) == '/');
}
/**
* Returns a new {@code URLClassLoader} instance for the given URLs and the
* system {@code ClassLoader} as its parent. The method {@code loadClass()}
* of the new instance will call {@code
* SecurityManager.checkPackageAccess()} before loading a class.
*
* @param urls
* the list of URLs that is passed to the new {@code
* URLClassloader}.
* @return the created {@code URLClassLoader} instance.
* @since Android 1.0
*/
public static URLClassLoader newInstance(final URL[] urls) {
URLClassLoader sub = AccessController
.doPrivileged(new PrivilegedAction<URLClassLoader>() {
public URLClassLoader run() {
return new SubURLClassLoader(urls);
}
});
sub.currentContext = AccessController.getContext();
return sub;
}
/**
* Returns a new {@code URLClassLoader} instance for the given URLs and the
* specified {@code ClassLoader} as its parent. The method {@code
* loadClass()} of the new instance will call the SecurityManager's {@code
* checkPackageAccess()} before loading a class.
*
* @param urls
* the list of URLs that is passed to the new URLClassloader.
* @param parentCl
* the parent class loader that is passed to the new
* URLClassloader.
* @return the created {@code URLClassLoader} instance.
* @since Android 1.0
*/
public static URLClassLoader newInstance(final URL[] urls,
final ClassLoader parentCl) {
URLClassLoader sub = AccessController
.doPrivileged(new PrivilegedAction<URLClassLoader>() {
public URLClassLoader run() {
return new SubURLClassLoader(urls, parentCl);
}
});
sub.currentContext = AccessController.getContext();
return sub;
}
/**
* Constructs a new {@code URLClassLoader} instance. The newly created
* instance will have the specified {@code ClassLoader} as its parent and
* use the specified factory to create stream handlers. URLs that end with
* "/" are assumed to be directories, otherwise they are assumed to be JAR
* files.
*
* @param searchUrls
* the list of URLs where a specific class or file could be
* found.
* @param parent
* the {@code ClassLoader} to assign as this loader's parent.
* @param factory
* the factory that will be used to create protocol-specific
* stream handlers.
* @throws SecurityException
* if a security manager exists and its {@code
* checkCreateClassLoader()} method doesn't allow creation of
* new {@code ClassLoader}s.
* @since Android 1.0
*/
public URLClassLoader(URL[] searchUrls, ClassLoader parent,
URLStreamHandlerFactory factory) {
super(parent);
// Required for pre-v1.2 security managers to work
SecurityManager security = System.getSecurityManager();
if (security != null) {
security.checkCreateClassLoader();
}
this.factory = factory;
// capture the context of the thread that creates this URLClassLoader
currentContext = AccessController.getContext();
int nbUrls = searchUrls.length;
urls = new URL[nbUrls];
orgUrls = new URL[nbUrls];
// Search each jar for CLASS-PATH attribute in manifest
extensions = new HashMap<URL, URL[]>(nbUrls * 2);
for (int i = 0; i < nbUrls; i++) {
try {
urls[i] = createSearchURL(searchUrls[i]);
extensions.put(urls[i], null);
} catch (MalformedURLException e) {
}
orgUrls[i] = searchUrls[i];
}
// Search each jar for META-INF/INDEX.LIST
indexes = newHashtableArray(nbUrls);
}
/**
* Tries to locate and load the specified class using the known URLs. If the
* class could be found, a class object representing the loaded class will
* be returned.
*
* @return the class that has been loaded.
* @param clsName
* the name of the class which has to be found.
* @throws ClassNotFoundException
* if the specified class cannot be loaded.
* @since Android 1.0
*/
@Override
protected Class<?> findClass(final String clsName)
throws ClassNotFoundException {
Class<?> cls = AccessController.doPrivileged(
new PrivilegedAction<Class<?>>() {
public Class<?> run() {
return findClassImpl(urls, clsName);
}
}, currentContext);
if (cls != null) {
return cls;
}
throw new ClassNotFoundException(clsName);
}
/**
* Returns an URL that will be checked if it contains the class or resource.
* If the file component of the URL is not a directory, a Jar URL will be
* created.
*
* @return java.net.URL a test URL
*/
private URL createSearchURL(URL url) throws MalformedURLException {
if (url == null) {
return url;
}
String protocol = url.getProtocol();
if (isDirectory(url) || protocol.equals("jar")) { //$NON-NLS-1$
return url;
}
if (factory == null) {
return new URL("jar", "", //$NON-NLS-1$ //$NON-NLS-2$
-1, url.toString() + "!/"); //$NON-NLS-1$
}
return new URL("jar", "", //$NON-NLS-1$ //$NON-NLS-2$
-1, url.toString() + "!/", //$NON-NLS-1$
factory.createURLStreamHandler(protocol));
}
/**
* Returns an URL referencing the specified resource or {@code null} if the
* resource could not be found.
*
* @param name
* the name of the requested resource.
* @return the URL which points to the given resource.
* @since Android 1.0
*/
@Override
public URL findResource(final String name) {
if (name == null) {
return null;
}
URL result = AccessController.doPrivileged(new PrivilegedAction<URL>() {
public URL run() {
return findResourceImpl(urls, name);
}
}, currentContext);
SecurityManager sm;
if (result != null && (sm = System.getSecurityManager()) != null) {
try {
sm.checkPermission(result.openConnection().getPermission());
} catch (IOException e) {
return null;
} catch (SecurityException e) {
return null;
}
}
return result;
}
/**
* Returns a URL among the given ones referencing the specified resource or
* null if no resource could be found.
*
* @return URL URL for the resource.
* @param searchList
* java.net.URL[] the array to be searched
* @param resName
* java.lang.String the name of the requested resource
*/
URL findResourceImpl(URL[] searchList, String resName) {
boolean findInExtensions = searchList == urls;
int i = 0;
while (i < searchList.length) {
if (searchList[i] == null) {
// KA024=One of urls is null
throw new NullPointerException(Msg.getString("KA024")); //$NON-NLS-1$
} else if (!invalidUrls.contains(searchList[i])) {
JarFile jf = null;
try {
URL currentUrl = searchList[i];
String protocol = currentUrl.getProtocol();
if (protocol.equals("jar")) { //$NON-NLS-1$
jf = resCache.get(currentUrl);
if (jf == null) {
if (invalidUrls.contains(currentUrl)) {
continue;
}
// each jf should be found only once
// so we do this job in the synchronized block
synchronized (lock) {
// Check the cache again in case another thread
// updated it while we're waiting on lock
jf = resCache.get(currentUrl);
if (jf == null) {
if (invalidUrls.contains(currentUrl)) {
continue;
}
/*
* If the connection for currentUrl or resURL is
* used, getJarFile() will throw an exception if the
* entry doesn't exist.
*/
URL jarURL = ((JarURLConnection) currentUrl
.openConnection()).getJarFileURL();
try {
JarURLConnection juc = (JarURLConnection) new URL(
"jar", "", //$NON-NLS-1$ //$NON-NLS-2$
jarURL.toExternalForm() + "!/").openConnection(); //$NON-NLS-1$
jf = juc.getJarFile();
resCache.put(currentUrl, jf);
} catch (IOException e) {
// Don't look for this jar file again
invalidUrls.add(searchList[i]);
throw e;
}
}
}
}
String entryName;
if (currentUrl.getFile().endsWith("!/")) { //$NON-NLS-1$
entryName = resName;
} else {
String file = currentUrl.getFile();
int sepIdx = file.lastIndexOf("!/"); //$NON-NLS-1$
if (sepIdx == -1) {
// Invalid URL, don't look here again
invalidUrls.add(searchList[i]);
continue;
}
sepIdx += 2;
entryName = new StringBuffer(file.length() - sepIdx
+ resName.length()).append(
file.substring(sepIdx)).append(resName)
.toString();
}
if (jf.getEntry(entryName) != null) {
return targetURL(currentUrl, resName);
}
} else if (protocol.equals("file")) { //$NON-NLS-1$
String baseFile = currentUrl.getFile();
String host = currentUrl.getHost();
int hostLength = 0;
if (host != null) {
hostLength = host.length();
}
StringBuffer buf = new StringBuffer(2 + hostLength
+ baseFile.length() + resName.length());
if (hostLength > 0) {
buf.append("//").append(host); //$NON-NLS-1$
}
// baseFile always ends with '/'
buf.append(baseFile);
String fixedResName = resName;
// Do not create a UNC path, i.e. \\host
while (fixedResName.startsWith("/") //$NON-NLS-1$
|| fixedResName.startsWith("\\")) { //$NON-NLS-1$
fixedResName = fixedResName.substring(1);
}
buf.append(fixedResName);
String filename = buf.toString();
try {
filename = URLDecoder.decode(filename, "UTF-8"); //$NON-NLS-1$
} catch (IllegalArgumentException e) {
return null;
}
if (new File(filename).exists()) {
return targetURL(currentUrl, fixedResName);
}
} else {
URL resURL = targetURL(currentUrl, resName);
URLConnection uc = resURL.openConnection();
try {
uc.getInputStream().close();
} catch (SecurityException e) {
return null;
}
// HTTP can return a stream on a non-existent file
// So check for the return code;
if (!resURL.getProtocol().equals("http")) { //$NON-NLS-1$
return resURL;
}
int code;
if ((code = ((HttpURLConnection) uc).getResponseCode()) >= 200
&& code < 300) {
return resURL;
}
}
} catch (MalformedURLException e) {
// Keep iterating through the URL list
} catch (IOException e) {
} catch (SecurityException e) {
}
if ((jf != null) && findInExtensions) {
if (indexes[i] != null) {
try {
URL result = (URL) findInIndex(i, resName, null,
true);
if (result != null) {
return result;
}
} catch (InvalidJarIndexException ex) {
// Ignore invalid/misleading JAR index file
}
} else {
URL result = (URL) findInExtensions(explore(
searchList[i], i), resName, i, null, true);
if (result != null) {
return result;
}
}
}
}
++i;
}
return null;
}
/**
* Defines a new package using the information extracted from the specified
* manifest.
*
* @param packageName
* the name of the new package.
* @param manifest
* the manifest containing additional information for the new
* package.
* @param url
* the URL to the code source for the new package.
* @return the created package.
* @throws IllegalArgumentException
* if a package with the given name already exists.
* @since Android 1.0
*/
protected Package definePackage(String packageName, Manifest manifest,
URL url) throws IllegalArgumentException {
Attributes mainAttributes = manifest.getMainAttributes();
String dirName = packageName.replace('.', '/') + "/"; //$NON-NLS-1$
Attributes packageAttributes = manifest.getAttributes(dirName);
boolean noEntry = false;
if (packageAttributes == null) {
noEntry = true;
packageAttributes = mainAttributes;
}
String specificationTitle = packageAttributes
.getValue(Attributes.Name.SPECIFICATION_TITLE);
if (specificationTitle == null && !noEntry) {
specificationTitle = mainAttributes
.getValue(Attributes.Name.SPECIFICATION_TITLE);
}
String specificationVersion = packageAttributes
.getValue(Attributes.Name.SPECIFICATION_VERSION);
if (specificationVersion == null && !noEntry) {
specificationVersion = mainAttributes
.getValue(Attributes.Name.SPECIFICATION_VERSION);
}
String specificationVendor = packageAttributes
.getValue(Attributes.Name.SPECIFICATION_VENDOR);
if (specificationVendor == null && !noEntry) {
specificationVendor = mainAttributes
.getValue(Attributes.Name.SPECIFICATION_VENDOR);
}
String implementationTitle = packageAttributes
.getValue(Attributes.Name.IMPLEMENTATION_TITLE);
if (implementationTitle == null && !noEntry) {
implementationTitle = mainAttributes
.getValue(Attributes.Name.IMPLEMENTATION_TITLE);
}
String implementationVersion = packageAttributes
.getValue(Attributes.Name.IMPLEMENTATION_VERSION);
if (implementationVersion == null && !noEntry) {
implementationVersion = mainAttributes
.getValue(Attributes.Name.IMPLEMENTATION_VERSION);
}
String implementationVendor = packageAttributes
.getValue(Attributes.Name.IMPLEMENTATION_VENDOR);
if (implementationVendor == null && !noEntry) {
implementationVendor = mainAttributes
.getValue(Attributes.Name.IMPLEMENTATION_VENDOR);
}
return definePackage(packageName, specificationTitle,
specificationVersion, specificationVendor, implementationTitle,
implementationVersion, implementationVendor, isSealed(manifest,
dirName) ? url : null);
}
private boolean isSealed(Manifest manifest, String dirName) {
Attributes mainAttributes = manifest.getMainAttributes();
String value = mainAttributes.getValue(Attributes.Name.SEALED);
boolean sealed = value != null && value.toLowerCase().equals("true"); //$NON-NLS-1$
Attributes attributes = manifest.getAttributes(dirName);
if (attributes != null) {
value = attributes.getValue(Attributes.Name.SEALED);
if (value != null) {
sealed = value.toLowerCase().equals("true"); //$NON-NLS-1$
}
}
return sealed;
}
/**
* returns URLs referenced in the string classpath.
*
* @param root
* the jar URL that classpath is related to
* @param classpath
* the relative URLs separated by spaces
*
* @return URL[] the URLs contained in the string classpath.
*/
private URL[] getInternalURLs(URL root, String classpath) {
// Class-path attribute is composed of space-separated values.
StringTokenizer tokenizer = new java.util.StringTokenizer(classpath);
Vector<URL> addedURLs = new Vector<URL>();
String file = root.getFile();
int jarIndex = file.lastIndexOf("!/") - 1; //$NON-NLS-1$
int index = file.lastIndexOf("/", jarIndex) + 1; //$NON-NLS-1$
if (index == 0) {
index = file.lastIndexOf(
System.getProperty("file.separator"), jarIndex) + 1; //$NON-NLS-1$
}
file = file.substring(0, index);
String protocol = root.getProtocol();
String host = root.getHost();
int port = root.getPort();
while (tokenizer.hasMoreElements()) {
String element = tokenizer.nextToken();
if (!element.equals("")) { //$NON-NLS-1$
try {
URL newURL = new URL(protocol, host, port, file + element
+ "!/"); //$NON-NLS-1$
synchronized (extensions) {
if (!extensions.containsKey(newURL)) {
extensions.put(newURL, null);
addedURLs.add(newURL);
}
}
} catch (MalformedURLException e) {
// Nothing is added
}
}
}
URL[] newURLs = addedURLs.toArray(new URL[] {});
return newURLs;
}
/**
* @param in
* InputStream the stream to read lines from
* @return List a list of String lines
*/
private List<String> readLines(InputStream in) throws IOException {
byte[] buff = new byte[144];
List<String> lines = new ArrayList<String>();
int pos = 0;
int next;
while ((next = in.read()) != -1) {
if (next == '\n') {
lines.add(new String(buff, 0, pos, "UTF8")); //$NON-NLS-1$
pos = 0;
continue;
}
if (next == '\r') {
lines.add(new String(buff, 0, pos, "UTF8")); //$NON-NLS-1$
pos = 0;
if ((next = in.read()) == '\n') {
continue;
}
}
if (pos == buff.length) {
byte[] newBuf = new byte[buff.length * 2];
System.arraycopy(buff, 0, newBuf, 0, buff.length);
buff = newBuf;
}
buff[pos++] = (byte) next;
}
if (pos > 0) {
lines.add(new String(buff, 0, pos, "UTF8")); //$NON-NLS-1$
}
return lines;
}
private URL targetURL(URL base, String name) throws MalformedURLException {
try {
String file = base.getFile() + URIEncoderDecoder.quoteIllegal(name,
"/@" + URI.someLegal);
return new URL(base.getProtocol(), base.getHost(), base.getPort(),
file, null);
} catch (UnsupportedEncodingException e) {
MalformedURLException e2 = new MalformedURLException(e.toString());
e2.initCause(e);
throw e2;
}
}
/**
* @param searchURLs
* java.net.URL[] the URLs to search in
* @param clsName
* java.lang.String the class name to be found
* @return Class the class found or null if not found
*/
Class<?> findClassImpl(URL[] searchURLs, String clsName) {
boolean readAvailable = false;
boolean findInExtensions = searchURLs == urls;
final String name = new StringBuffer(clsName.replace('.', '/')).append(
".class").toString(); //$NON-NLS-1$
for (int i = 0; i < searchURLs.length; i++) {
if (searchURLs[i] == null) {
// KA024=One of urls is null
throw new NullPointerException(Msg.getString("KA024")); //$NON-NLS-1$
} else if (!invalidUrls.contains(searchURLs[i])) {
Manifest manifest = null;
InputStream is = null;
JarEntry entry = null;
JarFile jf = null;
byte[] clBuf = null;
try {
URL thisURL = searchURLs[i];
String protocol = thisURL.getProtocol();
if (protocol.equals("jar")) { //$NON-NLS-1$
jf = resCache.get(thisURL);
if ((jf == null) && (!invalidUrls.contains(thisURL))) {
synchronized (lock) {
// Check the cache again in case another thread updated it
// updated it while we're waiting on lock
jf = resCache.get(thisURL);
if (jf == null) {
if (invalidUrls.contains(thisURL)) {
continue;
}
// If the connection for testURL or thisURL is used,
// getJarFile() will throw an exception if the entry
// doesn't exist.
URL jarURL = ((JarURLConnection) thisURL
.openConnection()).getJarFileURL();
try {
JarURLConnection juc = (JarURLConnection) new URL(
"jar", "", jarURL.toExternalForm() + "!/") //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
.openConnection();
jf = juc.getJarFile();
resCache.put(thisURL, jf);
} catch (IOException e) {
// Don't look for this jar file again
invalidUrls.add(searchURLs[i]);
throw e;
}
}
}
}
if (thisURL.getFile().endsWith("!/")) { //$NON-NLS-1$
entry = jf.getJarEntry(name);
} else {
String file = thisURL.getFile();
int sepIdx = file.lastIndexOf("!/"); //$NON-NLS-1$
if (sepIdx == -1) {
// Invalid URL, don't look here again
invalidUrls.add(searchURLs[i]);
continue;
}
sepIdx += 2;
String entryName = new StringBuffer(file.length()
- sepIdx + name.length()).append(
file.substring(sepIdx)).append(name)
.toString();
entry = jf.getJarEntry(entryName);
}
if (entry != null) {
readAvailable = true;
is = jf.getInputStream(entry);
/**
* Avoid recursive load class, especially the class
* is an implementation class of security provider
* and the jar is signed.
*/
Class loadedClass = findLoadedClass(clsName);
if (null != loadedClass) {
is.close();
return loadedClass;
}
manifest = jf.getManifest();
}
} else if (protocol.equals("file")) { //$NON-NLS-1$
String filename = thisURL.getFile();
String host = thisURL.getHost();
if (host != null && host.length() > 0) {
filename = new StringBuffer(host.length()
+ filename.length() + name.length() + 2)
.append("//").append(host).append(filename) //$NON-NLS-1$
.append(name).toString();
} else {
filename = new StringBuffer(filename.length()
+ name.length()).append(filename).append(
name).toString();
}
// Just return null for caller to throw
// ClassNotFoundException.
try {
filename = URLDecoder.decode(filename, "UTF-8"); //$NON-NLS-1$
} catch (IllegalArgumentException e) {
return null;
}
File file = new File(filename);
// Don't throw exceptions for speed
if (file.exists()) {
is = new FileInputStream(file);
readAvailable = true;
} else {
continue;
}
} else {
is = targetURL(thisURL, name).openStream();
}
} catch (MalformedURLException e) {
// Keep iterating through the URL list
} catch (IOException e) {
}
if (is != null) {
URL codeSourceURL = null;
Certificate[] certificates = null;
CodeSource codeS = null;
try {
codeSourceURL = findInExtensions ? orgUrls[i]
: ((JarURLConnection) searchURLs[i]
.openConnection()).getJarFileURL();
} catch (IOException e) {
codeSourceURL = searchURLs[i];
}
if (is != null) {
try {
clBuf = getBytes(is, readAvailable);
is.close();
} catch (IOException e) {
return null;
}
}
if (entry != null) {
certificates = entry.getCertificates();
}
// Use the original URL, not the possible jar URL
codeS = new CodeSource(codeSourceURL, certificates);
int dotIndex = clsName.lastIndexOf("."); //$NON-NLS-1$
if (dotIndex != -1) {
String packageName = clsName.substring(0, dotIndex);
synchronized (this) {
Package packageObj = getPackage(packageName);
if (packageObj == null) {
if (manifest != null) {
definePackage(packageName, manifest,
codeSourceURL);
} else {
definePackage(packageName, null, null,
null, null, null, null, null);
}
} else {
boolean exception = false;
if (manifest != null) {
String dirName = packageName.replace('.',
'/')
+ "/"; //$NON-NLS-1$
if (isSealed(manifest, dirName)) {
exception = !packageObj
.isSealed(codeSourceURL);
}
} else {
exception = packageObj.isSealed();
}
if (exception) {
throw new SecurityException(Msg
.getString("K004c")); //$NON-NLS-1$
}
}
}
}
return defineClass(clsName, clBuf, 0, clBuf.length, codeS);
}
if ((jf != null) && findInExtensions) {
if (indexes[i] != null) {
try {
Class<?> c = (Class<?>) findInIndex(i, clsName,
null, false);
if (c != null) {
return c;
}
} catch (InvalidJarIndexException ex) {
// Ignore misleading/wrong jar index
}
} else {
Class<?> c = (Class<?>) findInExtensions(explore(
searchURLs[i], i), clsName, i, null, false);
if (c != null) {
return c;
}
}
}
}
}
return null;
}
/**
* @param url
* URL the URL to explore
* @param indexNumber
* int the index in extensions to consider
*
* @return URL[] the URLs of bundled extensions that have been found (i.e.
* the URL of jar files in the class-path attribute), or null if
* none. if an INDEX.LIST has been found, an empty array is returned
*/
URL[] explore(URL url, int indexNumber) {
URL[] internal;
synchronized (extensions) {
internal = extensions.get(url);
}
if (internal != null) {
return internal;
}
if (indexes[indexNumber] != null) {
return null;
}
if (!url.getProtocol().equals("jar")) { //$NON-NLS-1$
return null;
}
JarFile jf = resCache.get(url);
// Add mappings from INDEX.LIST
ZipEntry ze = jf.getEntry("META-INF/INDEX.LIST"); //$NON-NLS-1$
if (ze != null) {
if (url.equals(urls[indexNumber])) {
try {
Hashtable<String, URL[]> index = new Hashtable<String, URL[]>(
15);
InputStream indexIS = jf.getInputStream(ze);
List<String> lines = readLines(indexIS);
indexIS.close();
ListIterator<String> iterator = lines.listIterator();
// Ignore the 2 first lines (index version)
iterator.next();
iterator.next();
// Add mappings from resource to jar file
URL fileURL = ((JarURLConnection) url.openConnection())
.getJarFileURL();
String file = fileURL.getFile();
String parentFile = new File(file).getParent();
parentFile = parentFile.replace(File.separatorChar, '/');
if (parentFile.charAt(0) != '/') {
parentFile = "/" + parentFile; //$NON-NLS-1$
}
URL parentURL = new URL(fileURL.getProtocol(), fileURL
.getHost(), fileURL.getPort(), parentFile);
while (iterator.hasNext()) {
URL jar = new URL("jar:" //$NON-NLS-1$
+ parentURL.toExternalForm() + "/" //$NON-NLS-1$
+ iterator.next() + "!/"); //$NON-NLS-1$
String resource = null;
while (iterator.hasNext()
&& !(resource = iterator.next()).equals("")) { //$NON-NLS-1$
if (index.containsKey(resource)) {
URL[] jars = index.get(resource);
URL[] newJars = new URL[jars.length + 1];
System.arraycopy(jars, 0, newJars, 0,
jars.length);
newJars[jars.length] = jar;
index.put(resource, newJars);
} else {
URL[] jars = { jar };
index.put(resource, jars);
}
}
}
indexes[indexNumber] = index;
} catch (MalformedURLException e) {
// Ignore this jar's index
} catch (IOException e) {
// Ignore this jar's index
}
}
return null;
}
// Returns URLs referenced by the class-path attribute.
Manifest manifest = null;
try {
manifest = jf.getManifest();
} catch (IOException e) {
}
String classpath = null;
if (manifest != null) {
classpath = manifest.getMainAttributes().getValue(
Attributes.Name.CLASS_PATH);
}
synchronized (extensions) {
internal = extensions.get(url);
if (internal == null) {
internal = classpath != null ? getInternalURLs(url, classpath)
: NO_PATH;
extensions.put(url, internal);
}
}
return internal;
}
}
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