[kaffe] CVS kaffe (robilad): Resynced with GNU Classpath: Added jessie to URL handler default search path
Kaffe CVS
cvs-commits at kaffe.org
Sun Apr 17 17:46:33 PDT 2005
PatchSet 5688
Date: 2005/04/18 00:36:51
Author: robilad
Branch: HEAD
Tag: (none)
Log:
Resynced with GNU Classpath: Added jessie to URL handler default search path
2005-04-17 Dalibor Topic <robilad at kaffe.org>
Resynced with GNU Classpath.
2005-03-28 Tom Tromey <tromey at redhat.com>
* java/net/URL.java (DEFAULT_SEARCH_PATH): Added
org.metastatic.jessie.
Members:
ChangeLog:1.3854->1.3855
libraries/javalib/java/net/URL.java:INITIAL->1.54
Index: kaffe/ChangeLog
diff -u kaffe/ChangeLog:1.3854 kaffe/ChangeLog:1.3855
--- kaffe/ChangeLog:1.3854 Mon Apr 18 00:25:23 2005
+++ kaffe/ChangeLog Mon Apr 18 00:36:51 2005
@@ -2,6 +2,15 @@
Resynced with GNU Classpath.
+ 2005-03-28 Tom Tromey <tromey at redhat.com>
+
+ * java/net/URL.java (DEFAULT_SEARCH_PATH): Added
+ org.metastatic.jessie.
+
+2005-04-17 Dalibor Topic <robilad at kaffe.org>
+
+ Resynced with GNU Classpath.
+
2005-03-28 Sven de Marothy <sven at physto.se>
* gnu/java/io/decode/DecoderUnicodeBig.java,
===================================================================
Checking out kaffe/libraries/javalib/java/net/URL.java
RCS: /home/cvs/kaffe/kaffe/libraries/javalib/java/net/URL.java,v
VERS: 1.54
***************
--- /dev/null Sun Aug 4 19:57:58 2002
+++ kaffe/libraries/javalib/java/net/URL.java Mon Apr 18 00:46:32 2005
@@ -0,0 +1,938 @@
+/* URL.java -- Uniform Resource Locator Class
+ Copyright (C) 1998, 1999, 2000, 2002, 2003, 2004, 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., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 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 java.net;
+
+import gnu.java.net.URLParseError;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import java.io.Serializable;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+import java.util.HashMap;
+import java.util.StringTokenizer;
+
+
+/*
+ * Written using on-line Java Platform 1.2 API Specification, as well
+ * as "The Java Class Libraries", 2nd edition (Addison-Wesley, 1998).
+ * Status: Believed complete and correct.
+ */
+
+/**
+ * This final class represents an Internet Uniform Resource Locator (URL).
+ * For details on the syntax of URL's and what they can be used for,
+ * refer to RFC 1738, available from <a
+ * href="http://ds.internic.net/rfcs/rfc1738.txt">
+ * http://ds.internic.net/rfcs/rfc1738.txt</a>
+ * <p>
+ * There are a great many protocols supported by URL's such as "http",
+ * "ftp", and "file". This object can handle any arbitrary URL for which
+ * a URLStreamHandler object can be written. Default protocol handlers
+ * are provided for the "http" and "ftp" protocols. Additional protocols
+ * handler implementations may be provided in the future. In any case,
+ * an application or applet can install its own protocol handlers that
+ * can be "chained" with other protocol hanlders in the system to extend
+ * the base functionality provided with this class. (Note, however, that
+ * unsigned applets cannot access properties by default or install their
+ * own protocol handlers).
+ * <p>
+ * This chaining is done via the system property java.protocol.handler.pkgs
+ * If this property is set, it is assumed to be a "|" separated list of
+ * package names in which to attempt locating protocol handlers. The
+ * protocol handler is searched for by appending the string
+ * ".<protocol>.Handler" to each packed in the list until a hander is
+ * found. If a protocol handler is not found in this list of packages, or if
+ * the property does not exist, then the default protocol handler of
+ * "gnu.java.net.<protocol>.Handler" is tried. If this is
+ * unsuccessful, a MalformedURLException is thrown.
+ * <p>
+ * All of the constructor methods of URL attempt to load a protocol
+ * handler and so any needed protocol handlers must be installed when
+ * the URL is constructed.
+ * <p>
+ * Here is an example of how URL searches for protocol handlers. Assume
+ * the value of java.protocol.handler.pkgs is "com.foo|com.bar" and the
+ * URL is "news://comp.lang.java.programmer". URL would looking the
+ * following places for protocol handlers:
+ * <p><pre>
+ * com.foo.news.Handler
+ * com.bar.news.Handler
+ * gnu.java.net.news.Handler
+ * </pre><p>
+ * If the protocol handler is not found in any of those locations, a
+ * MalformedURLException would be thrown.
+ * <p>
+ * Please note that a protocol handler must be a subclass of
+ * URLStreamHandler.
+ * <p>
+ * Normally, this class caches protocol handlers. Once it finds a handler
+ * for a particular protocol, it never tries to look up a new handler
+ * again. However, if the system property
+ * gnu.java.net.nocache_protocol_handlers is set, then this
+ * caching behavior is disabled. This property is specific to this
+ * implementation. Sun's JDK may or may not do protocol caching, but it
+ * almost certainly does not examine this property.
+ * <p>
+ * Please also note that an application can install its own factory for
+ * loading protocol handlers (see setURLStreamHandlerFactory). If this is
+ * done, then the above information is superseded and the behavior of this
+ * class in loading protocol handlers is dependent on that factory.
+ *
+ * @author Aaron M. Renn (arenn at urbanophile.com)
+ * @author Warren Levy (warrenl at cygnus.com)
+ *
+ * @see URLStreamHandler
+ */
+public final class URL implements Serializable
+{
+ private static final String DEFAULT_SEARCH_PATH =
+ "org.metastatic.jessie|gnu.java.net.protocol|gnu.inet";
+
+ // Cached System ClassLoader
+ private static ClassLoader systemClassLoader;
+
+ /**
+ * The name of the protocol for this URL.
+ * The protocol is always stored in lower case.
+ */
+ private String protocol;
+
+ /**
+ * The "authority" portion of the URL.
+ */
+ private String authority;
+
+ /**
+ * The hostname or IP address of this protocol.
+ * This includes a possible user. For example <code>joe at some.host.net</code>.
+ */
+ private String host;
+
+ /**
+ * The user information necessary to establish the connection.
+ */
+ private String userInfo;
+
+ /**
+ * The port number of this protocol or -1 if the port number used is
+ * the default for this protocol.
+ */
+ private int port = -1; // Initialize for constructor using context.
+
+ /**
+ * The "file" portion of the URL. It is defined as <code>path[?query]</code>.
+ */
+ private String file;
+
+ /**
+ * The anchor portion of the URL.
+ */
+ private String ref;
+
+ /**
+ * This is the hashCode for this URL
+ */
+ private int hashCode;
+
+ /**
+ * The protocol handler in use for this URL
+ */
+ transient URLStreamHandler ph;
+
+ /**
+ * If an application installs its own protocol handler factory, this is
+ * where we keep track of it.
+ */
+ private static URLStreamHandlerFactory factory;
+ private static final long serialVersionUID = -7627629688361524110L;
+
+ /**
+ * This a table where we cache protocol handlers to avoid the overhead
+ * of looking them up each time.
+ */
+ private static HashMap ph_cache = new HashMap();
+
+ /**
+ * Whether or not to cache protocol handlers.
+ */
+ private static boolean cache_handlers;
+
+ static
+ {
+ String s = System.getProperty("gnu.java.net.nocache_protocol_handlers");
+
+ if (s == null)
+ cache_handlers = true;
+ else
+ cache_handlers = false;
+ }
+
+ /**
+ * Constructs a URL and loads a protocol handler for the values passed as
+ * arguments.
+ *
+ * @param protocol The protocol for this URL ("http", "ftp", etc)
+ * @param host The hostname or IP address to connect to
+ * @param port The port number to use, or -1 to use the protocol's
+ * default port
+ * @param file The "file" portion of the URL.
+ *
+ * @exception MalformedURLException If a protocol handler cannot be loaded or
+ * a parse error occurs.
+ */
+ public URL(String protocol, String host, int port, String file)
+ throws MalformedURLException
+ {
+ this(protocol, host, port, file, null);
+ }
+
+ /**
+ * Constructs a URL and loads a protocol handler for the values passed in
+ * as arugments. Uses the default port for the protocol.
+ *
+ * @param protocol The protocol for this URL ("http", "ftp", etc)
+ * @param host The hostname or IP address for this URL
+ * @param file The "file" portion of this URL.
+ *
+ * @exception MalformedURLException If a protocol handler cannot be loaded or
+ * a parse error occurs.
+ */
+ public URL(String protocol, String host, String file)
+ throws MalformedURLException
+ {
+ this(protocol, host, -1, file, null);
+ }
+
+ /**
+ * This method initializes a new instance of <code>URL</code> with the
+ * specified protocol, host, port, and file. Additionally, this method
+ * allows the caller to specify a protocol handler to use instead of
+ * the default. If this handler is specified, the caller must have
+ * the "specifyStreamHandler" permission (see <code>NetPermission</code>)
+ * or a <code>SecurityException</code> will be thrown.
+ *
+ * @param protocol The protocol for this URL ("http", "ftp", etc)
+ * @param host The hostname or IP address to connect to
+ * @param port The port number to use, or -1 to use the protocol's default
+ * port
+ * @param file The "file" portion of the URL.
+ * @param ph The protocol handler to use with this URL.
+ *
+ * @exception MalformedURLException If no protocol handler can be loaded
+ * for the specified protocol.
+ * @exception SecurityException If the <code>SecurityManager</code> exists
+ * and does not allow the caller to specify its own protocol handler.
+ *
+ * @since 1.2
+ */
+ public URL(String protocol, String host, int port, String file,
+ URLStreamHandler ph) throws MalformedURLException
+ {
+ if (protocol == null)
+ throw new MalformedURLException("null protocol");
+ protocol = protocol.toLowerCase();
+ this.protocol = protocol;
+
+ if (ph != null)
+ {
+ SecurityManager s = System.getSecurityManager();
+ if (s != null)
+ s.checkPermission(new NetPermission("specifyStreamHandler"));
+
+ this.ph = ph;
+ }
+ else
+ this.ph = getURLStreamHandler(protocol);
+
+ if (this.ph == null)
+ throw new MalformedURLException("Protocol handler not found: "
+ + protocol);
+
+ this.host = host;
+ this.port = port;
+ this.authority = (host != null) ? host : "";
+ if (port >= 0 && host != null)
+ this.authority += ":" + port;
+
+ int hashAt = file.indexOf('#');
+ if (hashAt < 0)
+ {
+ this.file = file;
+ this.ref = null;
+ }
+ else
+ {
+ this.file = file.substring(0, hashAt);
+ this.ref = file.substring(hashAt + 1);
+ }
+ hashCode = hashCode(); // Used for serialization.
+ }
+
+ /**
+ * Initializes a URL from a complete string specification such as
+ * "http://www.urbanophile.com/arenn/". First the protocol name is parsed
+ * out of the string. Then a handler is located for that protocol and
+ * the parseURL() method of that protocol handler is used to parse the
+ * remaining fields.
+ *
+ * @param spec The complete String representation of a URL
+ *
+ * @exception MalformedURLException If a protocol handler cannot be found
+ * or the URL cannot be parsed
+ */
+ public URL(String spec) throws MalformedURLException
+ {
+ this((URL) null, spec != null ? spec : "", (URLStreamHandler) null);
+ }
+
+ /**
+ * This method parses a String representation of a URL within the
+ * context of an existing URL. Principally this means that any
+ * fields not present the URL are inheritied from the context URL.
+ * This allows relative URL's to be easily constructed. If the
+ * context argument is null, then a complete URL must be specified
+ * in the URL string. If the protocol parsed out of the URL is
+ * different from the context URL's protocol, then then URL String
+ * is also expected to be a complete URL.
+ *
+ * @param context The context on which to parse the specification
+ * @param spec The string to parse an URL
+ *
+ * @exception MalformedURLException If a protocol handler cannot be found
+ * for the URL cannot be parsed
+ */
+ public URL(URL context, String spec) throws MalformedURLException
+ {
+ this(context, spec, (URLStreamHandler) null);
+ }
+
+ /**
+ * Creates an URL from given arguments
+ * This method parses a String representation of a URL within the
+ * context of an existing URL. Principally this means that any fields
+ * not present the URL are inheritied from the context URL. This allows
+ * relative URL's to be easily constructed. If the context argument is
+ * null, then a complete URL must be specified in the URL string.
+ * If the protocol parsed out of the URL is different
+ * from the context URL's protocol, then then URL String is also
+ * expected to be a complete URL.
+ * <p>
+ * Additionally, this method allows the caller to specify a protocol handler
+ * to use instead of the default. If this handler is specified, the caller
+ * must have the "specifyStreamHandler" permission
+ * (see <code>NetPermission</code>) or a <code>SecurityException</code>
+ * will be thrown.
+ *
+ * @param context The context in which to parse the specification
+ * @param spec The string to parse as an URL
+ * @param ph The stream handler for the URL
+ *
+ * @exception MalformedURLException If a protocol handler cannot be found
+ * or the URL cannot be parsed
+ * @exception SecurityException If the <code>SecurityManager</code> exists
+ * and does not allow the caller to specify its own protocol handler.
+ *
+ * @since 1.2
+ */
+ public URL(URL context, String spec, URLStreamHandler ph)
+ throws MalformedURLException
+ {
+ /* A protocol is defined by the doc as the substring before a ':'
+ * as long as the ':' occurs before any '/'.
+ *
+ * If context is null, then spec must be an absolute URL.
+ *
+ * The relative URL need not specify all the components of a URL.
+ * If the protocol, host name, or port number is missing, the value
+ * is inherited from the context. A bare file component is appended
+ * to the context's file. The optional anchor is not inherited.
+ */
+
+ // If this is an absolute URL, then ignore context completely.
+ // An absolute URL must have chars prior to "://" but cannot have a colon
+ // right after the "://". The second colon is for an optional port value
+ // and implies that the host from the context is used if available.
+ int colon;
+ int slash = spec.indexOf('/');
+ if ((colon = spec.indexOf("://", 1)) > 0
+ && ((colon < slash || slash < 0))
+ && ! spec.regionMatches(colon, "://:", 0, 4))
+ context = null;
+
+ if ((colon = spec.indexOf(':')) > 0
+ && (colon < slash || slash < 0))
+ {
+ // Protocol specified in spec string.
+ protocol = spec.substring(0, colon).toLowerCase();
+ if (context != null && context.protocol.equals(protocol))
+ {
+ // The 1.2 doc specifically says these are copied to the new URL.
+ host = context.host;
+ port = context.port;
+ file = context.file;
+ userInfo = context.userInfo;
+ if (file == null || file.length() == 0)
+ file = "/";
+ authority = context.authority;
+ }
+ }
+ else if (context != null)
+ {
+ // Protocol NOT specified in spec string.
+ // Use context fields (except ref) as a foundation for relative URLs.
+ colon = -1;
+ protocol = context.protocol;
+ host = context.host;
+ port = context.port;
+ file = context.file;
+ userInfo = context.userInfo;
+ if (file == null || file.length() == 0)
+ file = "/";
+ authority = context.authority;
+ }
+ else // Protocol NOT specified in spec. and no context available.
+ throw new MalformedURLException("Absolute URL required with null context");
+
+ protocol = protocol.trim();
+
+ if (ph != null)
+ {
+ SecurityManager s = System.getSecurityManager();
+ if (s != null)
+ s.checkPermission(new NetPermission("specifyStreamHandler"));
+
+ this.ph = ph;
+ }
+ else
+ this.ph = getURLStreamHandler(protocol);
+
+ if (this.ph == null)
+ throw new MalformedURLException("Protocol handler not found: "
+ + protocol);
+
+ // JDK 1.2 doc for parseURL specifically states that any '#' ref
+ // is to be excluded by passing the 'limit' as the indexOf the '#'
+ // if one exists, otherwise pass the end of the string.
+ int hashAt = spec.indexOf('#', colon + 1);
+
+ try
+ {
+ this.ph.parseURL(this, spec, colon + 1,
+ hashAt < 0 ? spec.length() : hashAt);
+ }
+ catch (URLParseError e)
+ {
+ throw new MalformedURLException(e.getMessage());
+ }
+
+ if (hashAt >= 0)
+ ref = spec.substring(hashAt + 1);
+
+ hashCode = hashCode(); // Used for serialization.
+ }
+
+ /**
+ * Test another URL for equality with this one. This will be true only if
+ * the argument is non-null and all of the fields in the URL's match
+ * exactly (ie, protocol, host, port, file, and ref). Overrides
+ * Object.equals(), implemented by calling the equals method of the handler.
+ *
+ * @param obj The URL to compare with
+ *
+ * @return true if the URL is equal, false otherwise
+ */
+ public boolean equals(Object obj)
+ {
+ if (! (obj instanceof URL))
+ return false;
+
+ return ph.equals(this, (URL) obj);
+ }
+
+ /**
+ * Returns the contents of this URL as an object by first opening a
+ * connection, then calling the getContent() method against the connection
+ *
+ * @return A content object for this URL
+ * @exception IOException If opening the connection or getting the
+ * content fails.
+ *
+ * @since 1.3
+ */
+ public Object getContent() throws IOException
+ {
+ return openConnection().getContent();
+ }
+
+ /**
+ * Gets the contents of this URL
+ *
+ * @param classes The allow classes for the content object.
+ *
+ * @return a context object for this URL.
+ *
+ * @exception IOException If an error occurs
+ */
+ public Object getContent(Class[] classes) throws IOException
+ {
+ // FIXME: implement this
+ return getContent();
+ }
+
+ /**
+ * Returns the file portion of the URL.
+ * Defined as <code>path[?query]</code>.
+ * Returns the empty string if there is no file portion.
+ *
+ * @return The filename specified in this URL, or an empty string if empty.
+ */
+ public String getFile()
+ {
+ return file == null ? "" : file;
+ }
+
+ /**
+ * Returns the path of the URL. This is the part of the file before any '?'
+ * character.
+ *
+ * @return The path specified in this URL, or null if empty.
+ *
+ * @since 1.3
+ */
+ public String getPath()
+ {
+ // The spec says we need to return an empty string, but some
+ // applications depends on receiving null when the path is empty.
+ if (file == null)
+ return null;
+ int quest = file.indexOf('?');
+ return quest < 0 ? getFile() : file.substring(0, quest);
+ }
+
+ /**
+ * Returns the authority of the URL
+ *
+ * @return The authority specified in this URL.
+ *
+ * @since 1.3
+ */
+ public String getAuthority()
+ {
+ return authority;
+ }
+
+ /**
+ * Returns the host of the URL
+ *
+ * @return The host specified in this URL.
+ */
+ public String getHost()
+ {
+ int at = (host == null) ? -1 : host.indexOf('@');
+ return at < 0 ? host : host.substring(at + 1, host.length());
+ }
+
+ /**
+ * Returns the port number of this URL or -1 if the default port number is
+ * being used.
+ *
+ * @return The port number
+ *
+ * @see #getDefaultPort()
+ */
+ public int getPort()
+ {
+ return port;
+ }
+
+ /**
+ * Returns the default port of the URL. If the StreamHandler for the URL
+ * protocol does not define a default port it returns -1.
+ *
+ * @return The default port of the current protocol.
+ */
+ public int getDefaultPort()
+ {
+ return ph.getDefaultPort();
+ }
+
+ /**
+ * Returns the protocol of the URL
+ *
+ * @return The specified protocol.
+ */
+ public String getProtocol()
+ {
+ return protocol;
+ }
+
+ /**
+ * Returns the ref (sometimes called the "# reference" or "anchor") portion
+ * of the URL.
+ *
+ * @return The ref
+ */
+ public String getRef()
+ {
+ return ref;
+ }
+
+ /**
+ * Returns the user information of the URL. This is the part of the host
+ * name before the '@'.
+ *
+ * @return the user at a particular host or null when no user defined.
+ */
+ public String getUserInfo()
+ {
+ if (userInfo != null)
+ return userInfo;
+ int at = (host == null) ? -1 : host.indexOf('@');
+ return at < 0 ? null : host.substring(0, at);
+ }
+
+ /**
+ * Returns the query of the URL. This is the part of the file before the
+ * '?'.
+ *
+ * @return the query part of the file, or null when there is no query part.
+ */
+ public String getQuery()
+ {
+ int quest = (file == null) ? -1 : file.indexOf('?');
+ return quest < 0 ? null : file.substring(quest + 1, file.length());
+ }
+
+ /**
+ * Returns a hashcode computed by the URLStreamHandler of this URL
+ *
+ * @return The hashcode for this URL.
+ */
+ public int hashCode()
+ {
+ if (hashCode != 0)
+ return hashCode; // Use cached value if available.
+ else
+ return ph.hashCode(this);
+ }
+
+ /**
+ * Returns a URLConnection object that represents a connection to the remote
+ * object referred to by the URL. The URLConnection is created by calling the
+ * openConnection() method of the protocol handler
+ *
+ * @return A URLConnection for this URL
+ *
+ * @exception IOException If an error occurs
+ */
+ public URLConnection openConnection() throws IOException
+ {
+ return ph.openConnection(this);
+ }
+
+ /**
+ * Opens a connection to this URL and returns an InputStream for reading
+ * from that connection
+ *
+ * @return An <code>InputStream</code> for this URL.
+ *
+ * @exception IOException If an error occurs
+ */
+ public InputStream openStream() throws IOException
+ {
+ return openConnection().getInputStream();
+ }
+
+ /**
+ * Tests whether or not another URL refers to the same "file" as this one.
+ * This will be true if and only if the passed object is not null, is a
+ * URL, and matches all fields but the ref (ie, protocol, host, port,
+ * and file);
+ *
+ * @param url The URL object to test with
+ *
+ * @return true if URL matches this URL's file, false otherwise
+ */
+ public boolean sameFile(URL url)
+ {
+ return ph.sameFile(this, url);
+ }
+
+ /**
+ * Sets the specified fields of the URL. This is not a public method so
+ * that only URLStreamHandlers can modify URL fields. This might be called
+ * by the <code>parseURL()</code> method in that class. URLs are otherwise
+ * constant. If the given protocol does not exist, it will keep the previously
+ * set protocol.
+ *
+ * @param protocol The protocol name for this URL
+ * @param host The hostname or IP address for this URL
+ * @param port The port number of this URL
+ * @param file The "file" portion of this URL.
+ * @param ref The anchor portion of this URL.
+ */
+ protected void set(String protocol, String host, int port, String file,
+ String ref)
+ {
+ URLStreamHandler protocolHandler = null;
+ protocol = protocol.toLowerCase();
+ if (! this.protocol.equals(protocol))
+ protocolHandler = getURLStreamHandler(protocol);
+
+ // It is an hidden feature of the JDK. If the protocol does not exist,
+ // we keep the previously initialized protocol.
+ if (protocolHandler != null)
+ {
+ this.ph = protocolHandler;
+ this.protocol = protocol;
+ }
+ this.authority = "";
+ this.port = port;
+ this.host = host;
+ this.file = file;
+ this.ref = ref;
+
+ if (host != null)
+ this.authority += host;
+ if (port >= 0)
+ this.authority += ":" + port;
+
+ hashCode = hashCode(); // Used for serialization.
+ }
+
+ /**
+ * Sets the specified fields of the URL. This is not a public method so
+ * that only URLStreamHandlers can modify URL fields. URLs are otherwise
+ * constant. If the given protocol does not exist, it will keep the previously
+ * set protocol.
+ *
+ * @param protocol The protocol name for this URL.
+ * @param host The hostname or IP address for this URL.
+ * @param port The port number of this URL.
+ * @param authority The authority of this URL.
+ * @param userInfo The user and password (if needed) of this URL.
+ * @param path The "path" portion of this URL.
+ * @param query The query of this URL.
+ * @param ref The anchor portion of this URL.
+ *
+ * @since 1.3
+ */
+ protected void set(String protocol, String host, int port, String authority,
+ String userInfo, String path, String query, String ref)
+ {
+ URLStreamHandler protocolHandler = null;
+ protocol = protocol.toLowerCase();
+ if (! this.protocol.equals(protocol))
+ protocolHandler = getURLStreamHandler(protocol);
+
+ // It is an hidden feature of the JDK. If the protocol does not exist,
+ // we keep the previously initialized protocol.
+ if (protocolHandler != null)
+ {
+ this.ph = protocolHandler;
+ this.protocol = protocol;
+ }
+ this.host = host;
+ this.userInfo = userInfo;
+ this.port = port;
+ this.authority = authority;
+ if (query == null)
+ this.file = path;
+ else
+ this.file = path + "?" + query;
+ this.ref = ref;
+ hashCode = hashCode(); // Used for serialization.
+ }
+
+ /**
+ * Sets the URLStreamHandlerFactory for this class. This factory is
+ * responsible for returning the appropriate protocol handler for
+ * a given URL.
+ *
+ * @param fac The URLStreamHandlerFactory class to use
+ *
+ * @exception Error If the factory is alread set.
+ * @exception SecurityException If a security manager exists and its
+ * checkSetFactory method doesn't allow the operation
+ */
+ public static synchronized void setURLStreamHandlerFactory(URLStreamHandlerFactory fac)
+ {
+ if (factory != null)
+ throw new Error("URLStreamHandlerFactory already set");
+
+ // Throw an exception if an extant security mgr precludes
+ // setting the factory.
+ SecurityManager s = System.getSecurityManager();
+ if (s != null)
+ s.checkSetFactory();
+ factory = fac;
+ }
+
+ /**
+ * Returns a String representing this URL. The String returned is
+ * created by calling the protocol handler's toExternalForm() method.
+ *
+ * @return A string for this URL
+ */
+ public String toExternalForm()
+ {
+ // Identical to toString().
+ return ph.toExternalForm(this);
+ }
+
+ /**
+ * Returns a String representing this URL. Identical to toExternalForm().
+ * The value returned is created by the protocol handler's
+ * toExternalForm method. Overrides Object.toString()
+ *
+ * @return A string for this URL
+ */
+ public String toString()
+ {
+ // Identical to toExternalForm().
+ return ph.toExternalForm(this);
+ }
+
+ /**
+ * This internal method is used in two different constructors to load
+ * a protocol handler for this URL.
+ *
+ * @param protocol The protocol to load a handler for
+ *
+ * @return A URLStreamHandler for this protocol, or null when not found.
+ */
+ private static synchronized URLStreamHandler getURLStreamHandler(String protocol)
+ {
+ URLStreamHandler ph = null;
+
+ // First, see if a protocol handler is in our cache.
+ if (cache_handlers)
+ {
+ if ((ph = (URLStreamHandler) ph_cache.get(protocol)) != null)
+ return ph;
+ }
+
+ // If a non-default factory has been set, use it to find the protocol.
+ if (factory != null)
+ {
+ ph = factory.createURLStreamHandler(protocol);
+ }
+
+ // Non-default factory may have returned null or a factory wasn't set.
+ // Use the default search algorithm to find a handler for this protocol.
+ if (ph == null)
+ {
+ // Get the list of packages to check and append our default handler
+ // to it, along with the JDK specified default as a last resort.
+ // Except in very unusual environments the JDK specified one shouldn't
+ // ever be needed (or available).
+ String ph_search_path =
+ System.getProperty("java.protocol.handler.pkgs");
+
+ // Tack our default package on at the ends.
+ if (ph_search_path != null)
+ ph_search_path += "|" + DEFAULT_SEARCH_PATH;
+ else
+ ph_search_path = DEFAULT_SEARCH_PATH;
+
+ // Finally loop through our search path looking for a match.
+ StringTokenizer pkgPrefix = new StringTokenizer(ph_search_path, "|");
+
+ // Cache the systemClassLoader
+ if (systemClassLoader == null)
+ {
+ systemClassLoader = (ClassLoader) AccessController.doPrivileged
+ (new PrivilegedAction() {
+ public Object run()
+ {
+ return ClassLoader.getSystemClassLoader();
+ }
+ });
+ }
+
+ do
+ {
+ try
+ {
+ // Try to get a class from the system/application
+ // classloader, initialize it, make an instance
+ // and try to cast it to a URLStreamHandler.
+ String clsName =
+ (pkgPrefix.nextToken() + "." + protocol + ".Handler");
+ Class c = Class.forName(clsName, true, systemClassLoader);
+ ph = (URLStreamHandler) c.newInstance();
+ }
+ catch (ThreadDeath death)
+ {
+ throw death;
+ }
+ catch (Throwable t)
+ {
+ // Ignored.
+ }
+ }
+ while (ph == null && pkgPrefix.hasMoreTokens());
+ }
+
+ // Update the hashtable with the new protocol handler.
+ if (ph != null && cache_handlers)
+ ph_cache.put(protocol, ph);
+ else
+ ph = null;
+
+ return ph;
+ }
+
+ private void readObject(ObjectInputStream ois)
+ throws IOException, ClassNotFoundException
+ {
+ ois.defaultReadObject();
+ this.ph = getURLStreamHandler(protocol);
+ if (this.ph == null)
+ throw new IOException("Handler for protocol " + protocol + " not found");
+ }
+
+ private void writeObject(ObjectOutputStream oos) throws IOException
+ {
+ oos.defaultWriteObject();
+ }
+}
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