diff -r fd16c54261b3 -r 90ce3da70b43 jdk/src/share/classes/java/net/JarURLConnection.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/java/net/JarURLConnection.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,313 @@
+/*
+ * Copyright 1997-2006 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 java.net;
+
+import java.io.IOException;
+import java.util.jar.JarFile;
+import java.util.jar.JarEntry;
+import java.util.jar.Attributes;
+import java.util.jar.Manifest;
+import java.security.Permission;
+import sun.net.www.ParseUtil;
+
+/**
+ * A URL Connection to a Java ARchive (JAR) file or an entry in a JAR
+ * file.
+ *
+ * <p>The syntax of a JAR URL is:
+ *
+ * <pre>
+ * jar:&lt;url&gt;!/{entry}
+ * </pre>
+ *
+ * <p>for example:
+ *
+ * <p><code>
+ * jar:http://www.foo.com/bar/baz.jar!/COM/foo/Quux.class<br>
+ * </code>
+ *
+ * <p>Jar URLs should be used to refer to a JAR file or entries in
+ * a JAR file. The example above is a JAR URL which refers to a JAR
+ * entry. If the entry name is omitted, the URL refers to the whole
+ * JAR file:
+ *
+ * <code>
+ * jar:http://www.foo.com/bar/baz.jar!/
+ * </code>
+ *
+ * <p>Users should cast the generic URLConnection to a
+ * JarURLConnection when they know that the URL they created is a JAR
+ * URL, and they need JAR-specific functionality. For example:
+ *
+ * <pre>
+ * URL url = new URL("jar:file:/home/duke/duke.jar!/");
+ * JarURLConnection jarConnection = (JarURLConnection)url.openConnection();
+ * Manifest manifest = jarConnection.getManifest();
+ * </pre>
+ *
+ * <p>JarURLConnection instances can only be used to read from JAR files.
+ * It is not possible to get a {@link java.io.OutputStream} to modify or write
+ * to the underlying JAR file using this class.
+ * <p>Examples:
+ *
+ * <dl>
+ *
+ * <dt>A Jar entry
+ * <dd><code>jar:http://www.foo.com/bar/baz.jar!/COM/foo/Quux.class</code>
+ *
+ * <dt>A Jar file
+ * <dd><code>jar:http://www.foo.com/bar/baz.jar!/</code>
+ *
+ * <dt>A Jar directory
+ * <dd><code>jar:http://www.foo.com/bar/baz.jar!/COM/foo/</code>
+ *
+ * </dl>
+ *
+ * <p><code>!/</code> is refered to as the <em>separator</em>.
+ *
+ * <p>When constructing a JAR url via <code>new URL(context, spec)</code>,
+ * the following rules apply:
+ *
+ * <ul>
+ *
+ * <li>if there is no context URL and the specification passed to the
+ * URL constructor doesn't contain a separator, the URL is considered
+ * to refer to a JarFile.
+ *
+ * <li>if there is a context URL, the context URL is assumed to refer
+ * to a JAR file or a Jar directory.
+ *
+ * <li>if the specification begins with a '/', the Jar directory is
+ * ignored, and the spec is considered to be at the root of the Jar
+ * file.
+ *
+ * <p>Examples:
+ *
+ * <dl>
+ *
+ * <dt>context: <b>jar:http://www.foo.com/bar/jar.jar!/</b>,
+ * spec:<b>baz/entry.txt</b>
+ *
+ * <dd>url:<b>jar:http://www.foo.com/bar/jar.jar!/baz/entry.txt</b>
+ *
+ * <dt>context: <b>jar:http://www.foo.com/bar/jar.jar!/baz</b>,
+ * spec:<b>entry.txt</b>
+ *
+ * <dd>url:<b>jar:http://www.foo.com/bar/jar.jar!/baz/entry.txt</b>
+ *
+ * <dt>context: <b>jar:http://www.foo.com/bar/jar.jar!/baz</b>,
+ * spec:<b>/entry.txt</b>
+ *
+ * <dd>url:<b>jar:http://www.foo.com/bar/jar.jar!/entry.txt</b>
+ *
+ * </dl>
+ *
+ * </ul>
+ *
+ * @see java.net.URL
+ * @see java.net.URLConnection
+ *
+ * @see java.util.jar.JarFile
+ * @see java.util.jar.JarInputStream
+ * @see java.util.jar.Manifest
+ * @see java.util.zip.ZipEntry
+ *
+ * @author Benjamin Renaud
+ * @since 1.2
+ */
+public abstract class JarURLConnection extends URLConnection {
+
+    private URL jarFileURL;
+    private String entryName;
+
+    /**
+     * The connection to the JAR file URL, if the connection has been
+     * initiated. This should be set by connect.
+     */
+    protected URLConnection jarFileURLConnection;
+
+    /**
+     * Creates the new JarURLConnection to the specified URL.
+     * @param url the URL
+     * @throws MalformedURLException if no legal protocol
+     * could be found in a specification string or the
+     * string could not be parsed.
+     */
+
+    protected JarURLConnection(URL url) throws MalformedURLException {
+        super(url);
+        parseSpecs(url);
+    }
+
+    /* get the specs for a given url out of the cache, and compute and
+     * cache them if they're not there.
+     */
+    private void parseSpecs(URL url) throws MalformedURLException {
+        String spec = url.getFile();
+
+        int separator = spec.indexOf("!/");
+        /*
+         * REMIND: we don't handle nested JAR URLs
+         */
+        if (separator == -1) {
+            throw new MalformedURLException("no !/ found in url spec:" + spec);
+        }
+
+        jarFileURL = new URL(spec.substring(0, separator++));
+        entryName = null;
+
+        /* if ! is the last letter of the innerURL, entryName is null */
+        if (++separator != spec.length()) {
+            entryName = spec.substring(separator, spec.length());
+            entryName = ParseUtil.decode (entryName);
+        }
+    }
+
+    /**
+     * Returns the URL for the Jar file for this connection.
+     *
+     * @return the URL for the Jar file for this connection.
+     */
+    public URL getJarFileURL() {
+        return jarFileURL;
+    }
+
+    /**
+     * Return the entry name for this connection. This method
+     * returns null if the JAR file URL corresponding to this
+     * connection points to a JAR file and not a JAR file entry.
+     *
+     * @return the entry name for this connection, if any.
+     */
+    public String getEntryName() {
+        return entryName;
+    }
+
+    /**
+     * Return the JAR file for this connection.
+     *
+     * @return the JAR file for this connection. If the connection is
+     * a connection to an entry of a JAR file, the JAR file object is
+     * returned
+     *
+     * @exception IOException if an IOException occurs while trying to
+     * connect to the JAR file for this connection.
+     *
+     * @see #connect
+     */
+    public abstract JarFile getJarFile() throws IOException;
+
+    /**
+     * Returns the Manifest for this connection, or null if none.
+     *
+     * @return the manifest object corresponding to the JAR file object
+     * for this connection.
+     *
+     * @exception IOException if getting the JAR file for this
+     * connection causes an IOException to be trown.
+     *
+     * @see #getJarFile
+     */
+    public Manifest getManifest() throws IOException {
+        return getJarFile().getManifest();
+    }
+
+    /**
+     * Return the JAR entry object for this connection, if any. This
+     * method returns null if the JAR file URL corresponding to this
+     * connection points to a JAR file and not a JAR file entry.
+     *
+     * @return the JAR entry object for this connection, or null if
+     * the JAR URL for this connection points to a JAR file.
+     *
+     * @exception IOException if getting the JAR file for this
+     * connection causes an IOException to be trown.
+     *
+     * @see #getJarFile
+     * @see #getJarEntry
+     */
+    public JarEntry getJarEntry() throws IOException {
+        return getJarFile().getJarEntry(entryName);
+    }
+
+    /**
+     * Return the Attributes object for this connection if the URL
+     * for it points to a JAR file entry, null otherwise.
+     *
+     * @return the Attributes object for this connection if the URL
+     * for it points to a JAR file entry, null otherwise.
+     *
+     * @exception IOException if getting the JAR entry causes an
+     * IOException to be thrown.
+     *
+     * @see #getJarEntry
+     */
+    public Attributes getAttributes() throws IOException {
+        JarEntry e = getJarEntry();
+        return e != null ? e.getAttributes() : null;
+    }
+
+    /**
+     * Returns the main Attributes for the JAR file for this
+     * connection.
+     *
+     * @return the main Attributes for the JAR file for this
+     * connection.
+     *
+     * @exception IOException if getting the manifest causes an
+     * IOException to be thrown.
+     *
+     * @see #getJarFile
+     * @see #getManifest
+     */
+    public Attributes getMainAttributes() throws IOException {
+        Manifest man = getManifest();
+        return man != null ? man.getMainAttributes() : null;
+    }
+
+    /**
+     * Return the Certificate object for this connection if the URL
+     * for it points to a JAR file entry, null otherwise. This method
+     * can only be called once
+     * the connection has been completely verified by reading
+     * from the input stream until the end of the stream has been
+     * reached. Otherwise, this method will return <code>null</code>
+     *
+     * @return the Certificate object for this connection if the URL
+     * for it points to a JAR file entry, null otherwise.
+     *
+     * @exception IOException if getting the JAR entry causes an
+     * IOException to be thrown.
+     *
+     * @see #getJarEntry
+     */
+    public java.security.cert.Certificate[] getCertificates()
+         throws IOException
+    {
+        JarEntry e = getJarEntry();
+        return e != null ? e.getCertificates() : null;
+    }
+}