[FOray-commit] SF.net SVN: foray: [7770] trunk/foray/foray-common/src/java/org/foray/common/url/FactoryProtocolRegistration.java

[<vic...@us...>]

Revision: 7770
Author:   victormote
Date:     2006-07-08 11:04:47 -0700 (Sat, 08 Jul 2006)
ViewCVS:  http://svn.sourceforge.net/foray/?rev=7770&view=rev

Log Message:
-----------
Add new Factory-only implementation, per Vincent Hennebert's request.

Added Paths:
-----------
    trunk/foray/foray-common/src/java/org/foray/common/url/FactoryProtocolRegistration.java
Added: trunk/foray/foray-common/src/java/org/foray/common/url/FactoryProtocolRegistration.java
===================================================================
--- trunk/foray/foray-common/src/java/org/foray/common/url/FactoryProtocolRegistration.java	                        (rev 0)
+++ trunk/foray/foray-common/src/java/org/foray/common/url/FactoryProtocolRegistration.java	2006-07-08 18:04:47 UTC (rev 7770)
@@ -0,0 +1,81 @@
+/*
+ * Copyright 2006 The FOray Project.
+ *      http://www.foray.org
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * This work is in part derived from the following work(s), used with the
+ * permission of the licensor:
+ *      Apache FOP, licensed by the Apache Software Foundation
+ *
+ */
+
+/*
+$Id$
+ */
+
+/* Known contributors:
+ *     Vincent Hennebert (original author)
+ */
+
+package org.foray.common.url;
+
+import java.net.URLStreamHandler;
+import java.net.URLStreamHandlerFactory;
+
+/**
+ * An implementation of {#link ProtocolHandlerRegistry} which does not attempt
+ * to use the "java.protocol.handler.pkgs" property to register new
+ * URLStreamHandlers, but instead attempts to use only a
+ * {@link URLStreamHandlerFactory}.
+ */
+public class FactoryProtocolRegistration
+        implements ProtocolRegistrationStrategy {
+
+    public FactoryProtocolRegistration() {
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public void registerProtocolHandler(String protocol,
+            URLStreamHandler handler) {
+        /* Get the Factory instance. */
+        FOrayURLStreamHandlerFactory factory =
+                FOrayURLStreamHandlerFactory.getURLStreamHandlerFactory();
+
+        if (factory == null) {
+            /* If factory is null, it is because something got registered in
+             * URL.setURLStreamHandlerFactory(URLStreamHandlerFactory)
+             * before our FOrayURLStreamHandlerFactory could register.
+             * There is nothing that can be done. */
+            return;
+        }
+
+        /* See if this protocol is already registered with the factory. */
+        URLStreamHandler registeredHandler = factory.createURLStreamHandler(
+                protocol);
+        if (registeredHandler != null) {
+            /* If already registed, that one is the one being used, and there
+             * is no way to change it. If it has in fact not yet been used,
+             * then registering this now would make the new one used instead
+             * of the old one. However, until we have some indication that this
+             * would be the "right" thing to do, we will not. */
+            return;
+        }
+
+        /* Register the protocol with the Factory. */
+        factory.registerProtocol(protocol, handler);
+    }
+
+}


Property changes on: trunk/foray/foray-common/src/java/org/foray/common/url/FactoryProtocolRegistration.java
___________________________________________________________________
Name: svn:keywords
   + "Author Id Rev Date URL"
Name: svn:eol-style
   + native


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