+++ /dev/null
-/* Copyright (C) 1999, 2000 Free Software Foundation
-
- This file is part of libgcj.
-
-This software is copyrighted work licensed under the terms of the
-Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
-details. */
-
-package java.net;
-
-import java.net.*;
-import java.io.*;
-import java.util.jar.*;
-import java.util.zip.*;
-import java.util.Vector;
-import java.util.Hashtable;
-
-/**
- * @author Kresten Krab Thorup <krab@gnu.org>
- * @date Aug 10, 1999.
- */
-
-
-public abstract class JarURLConnection extends URLConnection
-{
- // three different ways to say the same thing
- private final URL jarFileURL;
-
- /** The connection to the jar file itself. A JarURLConnection
- * can represent an entry in a jar file or an entire jar file. In
- * either case this describes just the jar file itself. */
- protected URLConnection jarFileURLConnection;
-
- // If this is a connection to a jar file element this is set, otherwose null.
- private final String element;
-
- // Cached JarURLConnection's
- static Hashtable conn_cache = new Hashtable();
-
- public URL getJarFileURL ()
- {
- return jarFileURL;
- }
-
- public String getEntryName ()
- {
- return element;
- }
-
- public JarURLConnection(URL url)
- throws MalformedURLException
- {
- super(url);
-
- String spec = url.getFile();
- int bang = spec.indexOf ("!/", 0);
- if (bang == -1)
- throw new MalformedURLException (url + ": No `!/' in spec.");
-
- // Extact the url for the jar itself.
- jarFileURL = new URL(spec.substring (0, bang));
-
- // Get the name of the element, if any.
- element = (bang+2==spec.length() ? null : spec.substring (bang+2));
- }
-
- public synchronized void connect() throws IOException
- {
- // Call is ignored if already connected.
- if (connected)
- return;
-
- if (getUseCaches())
- {
- jarFileURLConnection = (URLConnection) conn_cache.get (jarFileURL);
-
- if (jarFileURLConnection == null)
- {
- jarFileURLConnection = jarFileURL.openConnection ();
- jarFileURLConnection.setUseCaches (true);
- jarFileURLConnection.connect ();
- conn_cache.put (jarFileURL, jarFileURLConnection);
- }
- }
- else
- {
- jarFileURLConnection = jarFileURL.openConnection ();
- jarFileURLConnection.connect ();
- }
-
- connected = true;
- }
-
- public InputStream getInputStream() throws IOException
- {
- if (!connected)
- connect();
-
- if (! doInput)
- throw new ProtocolException("Can't open InputStream if doInput is false");
-
- if (element == null)
- {
- // This is a JarURLConnection for the entire jar file.
-
- InputStream jar_is = new BufferedInputStream(jarFileURLConnection.getInputStream ());
- return new JarInputStream(jar_is);
- }
-
- // Reaching this point, we're looking for an element of a jar file.
-
- JarFile jarfile = null;
-
- try
- {
- jarfile = getJarFile ();
- }
- catch (java.io.IOException x)
- {
- /* ignore */
- }
-
- if (jarfile != null)
- {
- // this is the easy way...
- return jarfile.getInputStream (jarfile.getEntry (element));
- }
- else
- {
- // If the jar file is not local, ...
- JarInputStream zis = new JarInputStream(jarFileURLConnection.getInputStream ());
-
- // This is hideous, we're doing a linear search...
- for (ZipEntry ent = zis.getNextEntry ();
- ent != null;
- ent = zis.getNextEntry ())
- {
- if (element.equals (ent.getName ()))
- {
- int size = (int)ent.getSize();
- byte[] data = new byte[size];
- zis.read (data, 0, size);
- return new ByteArrayInputStream (data);
- }
- }
- }
-
- return null;
- }
-
- public JarEntry getJarEntry () throws java.io.IOException
- {
- JarFile jarfile = null;
-
- if (element == null)
- return null;
-
- if (! doInput)
- throw new ProtocolException("Can't open JarEntry if doInput is false");
-
- try
- {
- jarfile = getJarFile ();
- }
- catch (java.io.IOException x)
- {
- /* ignore */
- }
-
- if (jarfile == null)
- {
- JarInputStream zis = new JarInputStream(jarFileURLConnection.getInputStream ());
-
- // This is hideous, we're doing a linear search for the thing...
- for (ZipEntry ent = zis.getNextEntry ();
- ent != null;
- ent = zis.getNextEntry ())
- {
- if (element.equals (ent.getName ()))
- {
- return new JarEntry (ent);
- }
- }
- }
-
- else
- {
- return jarfile.getJarEntry (element);
- }
-
- return null;
- }
-
- public abstract JarFile getJarFile() throws java.io.IOException;
-
-
- // Steal and borrow from protocol/file/Connection.java
-
- private Hashtable hdrHash = new Hashtable();
- private Vector hdrVec = new Vector();
- private boolean gotHeaders = false;
-
- // Override default method in URLConnection.
- public String getHeaderField(String name)
- {
- try
- {
- getHeaders();
- }
- catch (IOException x)
- {
- return null;
- }
- return (String) hdrHash.get(name.toLowerCase());
- }
-
- // Override default method in URLConnection.
- public String getHeaderField(int n)
- {
- try
- {
- getHeaders();
- }
- catch (IOException x)
- {
- return null;
- }
- if (n < hdrVec.size())
- return getField((String) hdrVec.elementAt(n));
-
- return null;
- }
-
- // Override default method in URLConnection.
- public String getHeaderFieldKey(int n)
- {
- try
- {
- getHeaders();
- }
- catch (IOException x)
- {
- return null;
- }
- if (n < hdrVec.size())
- return getKey((String) hdrVec.elementAt(n));
-
- return null;
- }
-
- private String getKey(String str)
- {
- if (str == null)
- return null;
- int index = str.indexOf(':');
- if (index >= 0)
- return str.substring(0, index);
- else
- return null;
- }
-
- private String getField(String str)
- {
- if (str == null)
- return null;
- int index = str.indexOf(':');
- if (index >= 0)
- return str.substring(index + 1).trim();
- else
- return str;
- }
-
- private void getHeaders() throws IOException
- {
- if (gotHeaders)
- return;
- gotHeaders = true;
-
- connect();
-
- // Yes, it is overkill to use the hash table and vector here since
- // we're only putting one header in the file, but in case we need
- // to add others later and for consistency, we'll implement it this way.
-
- // Add the only header we know about right now: Content-length.
- long len;
-
- if (element == null)
- len = jarFileURLConnection.getContentLength ();
- else
- len = getJarEntry ().getSize ();
-
- String line = "Content-length: " + len;
- hdrVec.addElement(line);
-
- // The key will never be null in this scenario since we build up the
- // headers ourselves. If we ever rely on getting a header from somewhere
- // else, then we may have to check if the result of getKey() is null.
- String key = getKey(line);
- hdrHash.put(key.toLowerCase(), Long.toString(len));
- }
-
-}
projects / msp430-gcc.git / blobdiff