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1   //
2   //  ========================================================================
3   //  Copyright (c) 1995-2016 Mort Bay Consulting Pty. Ltd.
4   //  ------------------------------------------------------------------------
5   //  All rights reserved. This program and the accompanying materials
6   //  are made available under the terms of the Eclipse Public License v1.0
7   //  and Apache License v2.0 which accompanies this distribution.
8   //
9   //      The Eclipse Public License is available at
10  //      http://www.eclipse.org/legal/epl-v10.html
11  //
12  //      The Apache License v2.0 is available at
13  //      http://www.opensource.org/licenses/apache2.0.php
14  //
15  //  You may elect to redistribute this code under either of these licenses.
16  //  ========================================================================
17  //
18  
19  package org.eclipse.jetty.websocket.jsr356.annotations;
20  
21  import javax.websocket.OnError;
22  
23  import org.eclipse.jetty.websocket.common.events.annotated.InvalidSignatureException;
24  import org.eclipse.jetty.websocket.jsr356.annotations.Param.Role;
25  
26  /**
27   * Param handling for @{@link OnError} parameters.
28   */
29  public class JsrParamIdOnError extends JsrParamIdBase implements IJsrParamId
30  {
31      public static final IJsrParamId INSTANCE = new JsrParamIdOnError();
32  
33      @Override
34      public boolean process(Param param, JsrCallable callable) throws InvalidSignatureException
35      {
36          if (super.process(param,callable))
37          {
38              // Found common roles
39              return true;
40          }
41  
42          if (param.type.isAssignableFrom(Throwable.class))
43          {
44              param.bind(Role.ERROR_CAUSE);
45              return true;
46          }
47          return false;
48      }
49  }