[FOray-commit] SF.net SVN: foray: [7704] trunk/foray/foray-common/src/java/org/foray/common

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

Revision: 7704
Author:   victormote
Date:     2006-06-19 09:07:09 -0700 (Mon, 19 Jun 2006)
ViewCVS:  http://svn.sourceforge.net/foray/?rev=7704&view=rev

Log Message:
-----------
Add abstract superclass to handle the details that it can handle.

Modified Paths:
--------------
    trunk/foray/foray-common/src/java/org/foray/common/ClasspathHandler.java

Added Paths:
-----------
    trunk/foray/foray-common/src/java/org/foray/common/AbstractURLStreamHandler.java
Added: trunk/foray/foray-common/src/java/org/foray/common/AbstractURLStreamHandler.java
===================================================================
--- trunk/foray/foray-common/src/java/org/foray/common/AbstractURLStreamHandler.java	                        (rev 0)
+++ trunk/foray/foray-common/src/java/org/foray/common/AbstractURLStreamHandler.java	2006-06-19 16:07:09 UTC (rev 7704)
@@ -0,0 +1,80 @@
+/*
+ * 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;
+
+import java.io.IOException;
+import java.net.URLStreamHandler;
+
+/**
+ * Abstract superclass for all URLStreamHandlers using the FOray scheme for
+ * custom URLStreamHandler registration.
+ */
+public abstract class AbstractURLStreamHandler extends URLStreamHandler {
+
+    /**
+     * Register an instance of this class with the custom
+     * URLStreamHandlerFactory so that this handler will be used for URLs of
+     * protocol "classpath".
+     */
+    protected static void register(String protocol, URLStreamHandler handler) {
+        /* Validate the input. */
+        if (protocol == null) {
+            return;
+        }
+        if (handler == null) {
+            return;
+        }
+
+        /* Get the Factory instance. */
+        FOrayURLStreamHandlerFactory factory =
+                FOrayURLStreamHandlerFactory.getURLStreamHandlerFactory();
+
+        /* 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. */
+            return;
+        }
+
+        /* Register the protocol with the Factory. */
+        try {
+            factory.registerProtocol(protocol, handler);
+        } catch (IOException e) {
+            /* This should never happen. We have already checked whether the
+             * protocol is previously registered, and we know that neither the
+             * protocol or handler are null. The only thing we could do is
+             * pass the exception upstream, but there is nothing they can do
+             * about it either. */
+            return;
+        }
+    }
+
+}


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

Modified: trunk/foray/foray-common/src/java/org/foray/common/ClasspathHandler.java
===================================================================
--- trunk/foray/foray-common/src/java/org/foray/common/ClasspathHandler.java	2006-06-19 15:38:32 UTC (rev 7703)
+++ trunk/foray/foray-common/src/java/org/foray/common/ClasspathHandler.java	2006-06-19 16:07:09 UTC (rev 7704)
@@ -43,7 +43,7 @@
  *   <li><code>classpath:path/to/the/resource</code></li>
  * </ul>
  */
-public class ClasspathHandler extends URLStreamHandler {
+public class ClasspathHandler extends AbstractURLStreamHandler {
 
     private static final String PROTOCOL = "classpath";
 
@@ -72,29 +72,8 @@
      * protocol "classpath".
      */
     public static void register() {
-        FOrayURLStreamHandlerFactory factory =
-                FOrayURLStreamHandlerFactory.getURLStreamHandlerFactory();
-        URLStreamHandler handler = factory.createURLStreamHandler(
-                ClasspathHandler.PROTOCOL);
-        if (handler != null) {
-            /* If already registed, that one is the one being used, and there
-             * is no way to change it. */
-            return;
-        }
-        handler = new ClasspathHandler();
-        if (handler == null) {
-            return;
-        }
-        try {
-            factory.registerProtocol(ClasspathHandler.PROTOCOL, handler);
-        } catch (IOException e) {
-            /* This should never happen. We have already checked whether the
-             * protocol is previously registered, and we know that neither the
-             * protocol or handler are null. The only thing we could do is
-             * pass the exception upstream, but there is nothing they can do
-             * about it either. */
-            return;
-        }
+        URLStreamHandler handler = new ClasspathHandler();
+        AbstractURLStreamHandler.register(ClasspathHandler.PROTOCOL, handler);
     }
 
 }


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