| // Copyright 2008 The Apache Software Foundation |
| // |
| // 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. |
| |
| package org.apache.tapestry.internal.services; |
| |
| import org.apache.tapestry.ComponentEventCallback; |
| import org.apache.tapestry.services.ComponentEventResultProcessor; |
| |
| import java.io.IOException; |
| |
| /** |
| * A wrapper around {@link ComponentEventResultProcessor} that encapsulates capturing the exception. |
| */ |
| public class ComponentResultProcessorWrapper implements ComponentEventCallback |
| { |
| private boolean aborted; |
| |
| private IOException exception; |
| |
| private final ComponentEventResultProcessor processor; |
| |
| public ComponentResultProcessorWrapper(ComponentEventResultProcessor processor) |
| { |
| this.processor = processor; |
| } |
| |
| public boolean handleResult(Object result) |
| { |
| try |
| { |
| processor.processResultValue(result); |
| } |
| catch (IOException ex) |
| { |
| exception = ex; |
| } |
| |
| aborted = true; |
| |
| return true; |
| } |
| |
| /** |
| * Returns true if {@link org.apache.tapestry.ComponentEventCallback#handleResult(Object)} was invoked, false |
| * otherwise. |
| * |
| * @return true if the event was aborted |
| * @throws IOException if {@link ComponentEventResultProcessor#processResultValue(Object)} threw an IOException |
| */ |
| public boolean isAborted() throws IOException |
| { |
| if (exception != null) throw exception; |
| |
| return aborted; |
| } |
| } |