Initial revision

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@102074 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 173 insertions, 0 deletions

diff --git a/libjava/classpath/gnu/java/net/protocol/jar/Handler.java b/libjava/classpath/gnu/java/net/protocol/jar/Handler.java
new file mode 100644
index 00000000000..316d8cb02be
--- /dev/null
+++ b/libjava/classpath/gnu/java/net/protocol/jar/Handler.java
@@ -0,0 +1,173 @@
+/* gnu.java.net.protocol.jar.Handler - jar protocol handler for java.net
+   Copyright (C) 1999, 2002, 2003, 2005 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+ 
+GNU Classpath 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 for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package gnu.java.net.protocol.jar;
+
+import gnu.java.net.URLParseError;
+
+import java.io.IOException;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.net.URLConnection;
+import java.net.URLStreamHandler;
+
+/**
+ * @author Kresten Krab Thorup (krab@gnu.org)
+ */
+public class Handler extends URLStreamHandler
+{
+  /**
+   * A do nothing constructor
+   */
+  public Handler()
+  {
+  }
+
+  /**
+   * This method returs a new JarURLConnection for the specified URL
+   *
+   * @param url The URL to return a connection for
+   *
+   * @return The URLConnection
+   *
+   * @exception IOException If an error occurs
+   */
+  protected URLConnection openConnection(URL url) throws IOException
+  {
+    return new Connection(url);
+  }
+
+  /**
+   * This method overrides URLStreamHandler's for parsing url of protocol "jar"
+   *
+   * @param url The URL object in which to store the results
+   * @param url_string The String-ized URL to parse
+   * @param start The position in the string to start scanning from
+   * @param end The position in the string to stop scanning
+   */
+  protected void parseURL (URL url, String url_string, int start, int end)
+  {
+    // This method does not throw an exception or return a value.  Thus our
+    // strategy when we encounter an error in parsing is to return without
+    // doing anything.
+    String file = url.getFile();
+    
+    if (!file.equals(""))
+      { //has context url
+	url_string = url_string.substring (start, end);
+        if (url_string.startsWith("/"))
+          { //url string is an absolute path
+            int idx = file.lastIndexOf ("!/");
+	    
+	    if (idx < 0)
+	      throw new URLParseError("no !/ in spec");
+	    
+	    file = file.substring (0, idx + 1) + url_string;
+          }
+        else if (url_string.length() > 0)
+          {
+            int idx = file.lastIndexOf ("/");
+            if (idx == -1) //context path is weird
+              file = "/" + url_string; 
+            else if (idx == (file.length() - 1))
+              //just concatenate two parts
+              file = file + url_string;
+            else
+              // according to Java API Documentation, here is a little different 
+              // with URLStreamHandler.parseURL
+              // but JDK seems doesn't handle it well
+              file = file.substring(0, idx + 1) + url_string;
+          }
+        
+        setURL (url, "jar", url.getHost(), url.getPort(), file, null);
+        return;
+      }
+
+    // Bunches of things should be true.  Make sure.
+    if (end < start)
+      return;
+    if (end - start < 2)
+      return;
+    if (start > url_string.length())
+      return;
+    
+    // Skip remains of protocol
+    url_string = url_string.substring (start, end);
+
+    int jar_stop;
+    if ((jar_stop = url_string.indexOf("!/")) < 0)
+      throw new URLParseError("no !/ in spec");
+
+    try
+      {
+	new URL(url_string.substring (0, jar_stop));
+      }
+    catch (MalformedURLException e)
+      {
+	throw new URLParseError("invalid inner URL: " + e.getMessage());
+      }
+    
+    if (!url.getProtocol().equals ("jar") )
+      throw new URLParseError("unexpected protocol " + url.getProtocol());
+        
+    setURL (url, "jar", url.getHost(), url.getPort(), url_string, null);
+  }
+
+  /**
+   * This method converts a Jar URL object into a String.
+   *
+   * @param url The URL object to convert
+   */
+  protected String toExternalForm (URL url)
+  {
+    String file = url.getFile();
+    String ref = url.getRef();
+
+    // return "jar:" + file;
+    // Performance!!: 
+    //  Do the concatenation manually to avoid resize StringBuffer's 
+    //  internal buffer.  The length of ref is not taken into consideration
+    //  as it's a rare path.
+    StringBuffer sb = new StringBuffer (file.length() + 5);
+    sb.append ("jar:");
+    sb.append (file);
+    if (ref != null)
+      sb.append('#').append(ref);
+    return sb.toString();
+  }
+}