Author: gpetracek
Date: Thu Jan 3 22:20:04 2013
New Revision: 1428642
URL: http://svn.apache.org/viewvc?rev=1428642&view=rev
Log:
OWB-344 ExceptionUtil for easier handling of exceptions
Added:
openwebbeans/trunk/webbeans-impl/src/main/java/org/apache/webbeans/util/ExceptionUtil.java
Added:
openwebbeans/trunk/webbeans-impl/src/main/java/org/apache/webbeans/util/ExceptionUtil.java
URL:
http://svn.apache.org/viewvc/openwebbeans/trunk/webbeans-impl/src/main/java/org/apache/webbeans/util/ExceptionUtil.java?rev=1428642&view=auto
==============================================================================
---
openwebbeans/trunk/webbeans-impl/src/main/java/org/apache/webbeans/util/ExceptionUtil.java
(added)
+++
openwebbeans/trunk/webbeans-impl/src/main/java/org/apache/webbeans/util/ExceptionUtil.java
Thu Jan 3 22:20:04 2013
@@ -0,0 +1,63 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you 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.
+ */
+package org.apache.webbeans.util;
+
+public abstract class ExceptionUtil
+{
+ private ExceptionUtil()
+ {
+ // prevent instantiation
+ }
+
+ public static RuntimeException throwAsRuntimeException(Throwable throwable)
+ {
+ //Attention: helper which allows to use a trick to throw
+ // a catched checked exception without a wrapping exception
+ new ExceptionHelper<RuntimeException>().throwException(throwable);
+ return null; //not needed due to the helper trick, but it's easier for
using it
+ }
+
+ @SuppressWarnings({ "unchecked" })
+ private static class ExceptionHelper<T extends Throwable>
+ {
+ private void throwException(Throwable exception) throws T
+ {
+ try
+ {
+ //exception-type is only checked at compile-time
+ throw (T) exception;
+ }
+ catch (ClassCastException e)
+ {
+ //doesn't happen with existing JVMs! - if that changes the
local ClassCastException needs to be ignored
+ //-> throw original exception
+ if
(e.getStackTrace()[0].toString().contains(getClass().getName()))
+ {
+ if (exception instanceof RuntimeException)
+ {
+ throw (RuntimeException) exception;
+ }
+ throw new RuntimeException(exception);
+ }
+ //if the exception to throw is a ClassCastException, throw it
+ throw e;
+ }
+ }
+ }
+}
