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1 // Copyright 2007, 2008 The Apache Software Foundation
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 package org.apache.tapestry5.internal.services;
16
17 import org.apache.tapestry5.services;
18
19 import java.io.IOException;
20
21 /**
22 * A filter that intercepts Ajax-oriented requests, thos that originate on the client-side using XmlHttpRequest. In
23 * these cases, the action processing occurs normally, but the response is quite different.
24 */
25 public class AjaxFilter implements ComponentEventRequestFilter
26 {
27 private final Request request;
28
29 private final ComponentEventRequestHandler ajaxHandler;
30
31 public AjaxFilter(Request request, @Ajax ComponentEventRequestHandler ajaxHandler)
32 {
33 this.request = request;
34 this.ajaxHandler = ajaxHandler;
35 }
36
37 public void handle(ComponentEventRequestParameters parameters, ComponentEventRequestHandler handler)
38 throws IOException
39 {
40 ComponentEventRequestHandler next = request.isXHR() ? ajaxHandler : handler;
41
42 next.handle(parameters);
43 }
44
45 }