--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/com/sun/naming/internal/VersionHelper12.java Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,256 @@
+/*
+ * Copyright 1999-2006 Sun Microsystems, Inc. All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package com.sun.naming.internal;
+
+import java.io.InputStream;
+import java.io.IOException;
+import java.net.MalformedURLException;
+import java.net.URLClassLoader;
+import java.net.URL;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+import java.security.PrivilegedActionException;
+import java.security.PrivilegedExceptionAction;
+import java.util.Enumeration;
+import java.util.Hashtable;
+import java.util.NoSuchElementException;
+import java.util.Properties;
+
+import javax.naming.*;
+
+/**
+ * VersionHelper was used by JNDI to accommodate differences between
+ * JDK 1.1.x and the Java 2 platform. As this is no longer necessary
+ * since JNDI's inclusion in the platform, this class currently
+ * serves as a set of utilities for performing system-level things,
+ * such as class-loading and reading system properties.
+ *
+ * @author Rosanna Lee
+ * @author Scott Seligman
+ */
+
+final class VersionHelper12 extends VersionHelper {
+
+ private boolean getSystemPropsFailed = false;
+
+ VersionHelper12() {} // Disallow external from creating one of these.
+
+ public Class loadClass(String className) throws ClassNotFoundException {
+ ClassLoader cl = getContextClassLoader();
+ return Class.forName(className, true, cl);
+ }
+
+ /**
+ * Package private.
+ */
+ Class loadClass(String className, ClassLoader cl)
+ throws ClassNotFoundException {
+ return Class.forName(className, true, cl);
+ }
+
+ /**
+ * @param className A non-null fully qualified class name.
+ * @param codebase A non-null, space-separated list of URL strings.
+ */
+ public Class loadClass(String className, String codebase)
+ throws ClassNotFoundException, MalformedURLException {
+ ClassLoader cl;
+
+ ClassLoader parent = getContextClassLoader();
+ cl = URLClassLoader.newInstance(getUrlArray(codebase), parent);
+
+ return Class.forName(className, true, cl);
+ }
+
+ String getJndiProperty(final int i) {
+ return (String) AccessController.doPrivileged(
+ new PrivilegedAction() {
+ public Object run() {
+ try {
+ return System.getProperty(PROPS[i]);
+ } catch (SecurityException e) {
+ return null;
+ }
+ }
+ }
+ );
+ }
+
+ String[] getJndiProperties() {
+ if (getSystemPropsFailed) {
+ return null; // after one failure, don't bother trying again
+ }
+ Properties sysProps = (Properties) AccessController.doPrivileged(
+ new PrivilegedAction() {
+ public Object run() {
+ try {
+ return System.getProperties();
+ } catch (SecurityException e) {
+ getSystemPropsFailed = true;
+ return null;
+ }
+ }
+ }
+ );
+ if (sysProps == null) {
+ return null;
+ }
+ String[] jProps = new String[PROPS.length];
+ for (int i = 0; i < PROPS.length; i++) {
+ jProps[i] = sysProps.getProperty(PROPS[i]);
+ }
+ return jProps;
+ }
+
+ InputStream getResourceAsStream(final Class c, final String name) {
+ return (InputStream) AccessController.doPrivileged(
+ new PrivilegedAction() {
+ public Object run() {
+ return c.getResourceAsStream(name);
+ }
+ }
+ );
+ }
+
+ InputStream getJavaHomeLibStream(final String filename) {
+ return (InputStream) AccessController.doPrivileged(
+ new PrivilegedAction() {
+ public Object run() {
+ try {
+ String javahome = System.getProperty("java.home");
+ if (javahome == null) {
+ return null;
+ }
+ String pathname = javahome + java.io.File.separator +
+ "lib" + java.io.File.separator + filename;
+ return new java.io.FileInputStream(pathname);
+ } catch (Exception e) {
+ return null;
+ }
+ }
+ }
+ );
+ }
+
+ NamingEnumeration getResources(final ClassLoader cl, final String name)
+ throws IOException
+ {
+ Enumeration urls;
+ try {
+ urls = (Enumeration) AccessController.doPrivileged(
+ new PrivilegedExceptionAction() {
+ public Object run() throws IOException {
+ return (cl == null)
+ ? ClassLoader.getSystemResources(name)
+ : cl.getResources(name);
+ }
+ }
+ );
+ } catch (PrivilegedActionException e) {
+ throw (IOException)e.getException();
+ }
+ return new InputStreamEnumeration(urls);
+ }
+
+ ClassLoader getContextClassLoader() {
+ return (ClassLoader) AccessController.doPrivileged(
+ new PrivilegedAction() {
+ public Object run() {
+ return Thread.currentThread().getContextClassLoader();
+ }
+ }
+ );
+ }
+
+
+ /**
+ * Given an enumeration of URLs, an instance of this class represents
+ * an enumeration of their InputStreams. Each operation on the URL
+ * enumeration is performed within a doPrivileged block.
+ * This is used to enumerate the resources under a foreign codebase.
+ * This class is not MT-safe.
+ */
+ class InputStreamEnumeration implements NamingEnumeration {
+
+ private final Enumeration urls;
+
+ private Object nextElement = null;
+
+ InputStreamEnumeration(Enumeration urls) {
+ this.urls = urls;
+ }
+
+ /*
+ * Returns the next InputStream, or null if there are no more.
+ * An InputStream that cannot be opened is skipped.
+ */
+ private Object getNextElement() {
+ return AccessController.doPrivileged(
+ new PrivilegedAction() {
+ public Object run() {
+ while (urls.hasMoreElements()) {
+ try {
+ return ((URL)urls.nextElement()).openStream();
+ } catch (IOException e) {
+ // skip this URL
+ }
+ }
+ return null;
+ }
+ }
+ );
+ }
+
+ public boolean hasMore() {
+ if (nextElement != null) {
+ return true;
+ }
+ nextElement = getNextElement();
+ return (nextElement != null);
+ }
+
+ public boolean hasMoreElements() {
+ return hasMore();
+ }
+
+ public Object next() {
+ if (hasMore()) {
+ Object res = nextElement;
+ nextElement = null;
+ return res;
+ } else {
+ throw new NoSuchElementException();
+ }
+ }
+
+ public Object nextElement() {
+ return next();
+ }
+
+ public void close() {
+ }
+ }
+}