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Posted to scm@geronimo.apache.org by jd...@apache.org on 2003/09/01 17:16:39 UTC
cvs commit: incubator-geronimo/modules/common/src/java/org/apache/geronimo/common/net/protocol URLStreamHandlerFactory.java Protocols.java
jdillon 2003/09/01 08:16:39
Modified: modules/common/src/java/org/apache/geronimo/common/net/protocol
Protocols.java
Added: modules/common/src/java/org/apache/geronimo/common/net/protocol
URLStreamHandlerFactory.java
Log:
o Added methods to handle lookup of URLStreamHandler classes & instances
o Added URLStreamHandlerFactory delegate to Protocols
Revision Changes Path
1.2 +78 -1 incubator-geronimo/modules/common/src/java/org/apache/geronimo/common/net/protocol/Protocols.java
Index: Protocols.java
===================================================================
RCS file: /home/cvs/incubator-geronimo/modules/common/src/java/org/apache/geronimo/common/net/protocol/Protocols.java,v
retrieving revision 1.1
retrieving revision 1.2
diff -u -r1.1 -r1.2
--- Protocols.java 30 Aug 2003 11:57:14 -0000 1.1
+++ Protocols.java 1 Sep 2003 15:16:39 -0000 1.2
@@ -57,13 +57,20 @@
package org.apache.geronimo.common.net.protocol;
import java.net.URL;
+import java.net.URLStreamHandler;
import java.util.List;
import java.util.LinkedList;
+import java.util.Iterator;
import java.util.StringTokenizer;
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+
import org.apache.geronimo.common.NullArgumentException;
import org.apache.geronimo.common.Strings;
+import org.apache.geronimo.common.Classes;
+import org.apache.geronimo.common.ThrowableHandler;
/**
* Protocol utilties.
@@ -72,6 +79,8 @@
*/
public class Protocols
{
+ private static final Log log = LogFactory.getLog(Protocols.class);
+
public static final String HANDLER_PACKAGES = "java.protocol.handler.pkgs";
public static final String SYSTEM_HANDLER_PACKAGES = System.getProperty(HANDLER_PACKAGES);
@@ -132,5 +141,73 @@
List list = getHandlerPackages();
list.add(0, name);
setHandlerPackages(list);
+ }
+
+ public static Class getURLStreamHandlerType(final String protocol)
+ {
+ if (protocol == null) {
+ throw new NullArgumentException("protocol");
+ }
+
+ Iterator iter = getHandlerPackages().iterator();
+ while (iter.hasNext()) {
+ String pkg = (String)iter.next();
+ String classname = pkg + "." + protocol + ".Handler";
+
+ try {
+ return Classes.loadClass(classname);
+ }
+ catch (ClassNotFoundException e) {
+ ThrowableHandler.add(e);
+ }
+ }
+
+ return null;
+ }
+
+ public static URLStreamHandler createURLStreamHandler(final String protocol)
+ {
+ // protocol checked by getURLStreamHandlerType
+
+ Class type = getURLStreamHandlerType(protocol);
+
+ if (type != null) {
+ try {
+ Object obj = type.newInstance();
+ if (obj instanceof URLStreamHandler) {
+ return (URLStreamHandler)obj;
+ }
+ else {
+ // Handler is not instance of URLStreamHandler; ignoring
+ }
+ }
+ catch (Exception e) {
+ ThrowableHandler.add(e);
+ }
+ }
+
+ return null;
+ }
+
+ /**
+ * Preload the specific protocol handlers, so that URL knows about
+ * them even if the handler factory is changed.
+ */
+ public static void preloadURLStreamHandlers(final String[] protocols)
+ {
+ if (protocols == null) {
+ throw new NullArgumentException("protocols");
+ }
+
+ for (int i=0; i<protocols.length; i++) {
+ if (protocols[i] == null) {
+ throw new NullArgumentException("protocols", i);
+ }
+
+ try {
+ URL url = new URL(protocols[i], "", -1, "");
+ }
+ catch (Exception ignore) {}
+ }
}
}
1.1 incubator-geronimo/modules/common/src/java/org/apache/geronimo/common/net/protocol/URLStreamHandlerFactory.java
Index: URLStreamHandlerFactory.java
===================================================================
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2003 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" and
* "Apache Geronimo" must not be used to endorse or promote products
* derived from this software without prior written permission. For
* written permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* "Apache Geronimo", nor may "Apache" appear in their name, without
* prior written permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
* ====================================================================
*/
package org.apache.geronimo.common.net.protocol;
import java.net.URLStreamHandler;
/**
* A factory for loading URL protocol handlers.
*
* <p>Delegates to {@link Protocols}.
*
* @version $Revision: 1.1 $ $Date: 2003/09/01 15:16:39 $
*/
public class URLStreamHandlerFactory
implements java.net.URLStreamHandlerFactory
{
public URLStreamHandler createURLStreamHandler(final String protocol)
{
// protocol is checked by Protocols for null
return Protocols.createURLStreamHandler(protocol);
}
}