1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 package org.apache.jasper.runtime;
19
20 import java.io.IOException;
21 import java.io.PrintWriter;
22
23 import javax.servlet.ServletOutputStream;
24 import javax.servlet.ServletResponse;
25 import javax.servlet.http.HttpServletResponse;
26 import javax.servlet.http.HttpServletResponseWrapper;
27 import javax.servlet.jsp.JspWriter;
28
29 /**
30 * ServletResponseWrapper used by the JSP 'include' action.
31 *
32 * This wrapper response object is passed to RequestDispatcher.include(), so
33 * that the output of the included resource is appended to that of the
34 * including page.
35 *
36 * @author Pierre Delisle
37 */
38
39 public class ServletResponseWrapperInclude extends HttpServletResponseWrapper {
40
41 /**
42 * PrintWriter which appends to the JspWriter of the including page.
43 */
44 private PrintWriter printWriter;
45
46 private JspWriter jspWriter;
47
48 public ServletResponseWrapperInclude(ServletResponse response,
49 JspWriter jspWriter) {
50 super((HttpServletResponse)response);
51 this.printWriter = new PrintWriter(jspWriter);
52 this.jspWriter = jspWriter;
53 }
54
55 /**
56 * Returns a wrapper around the JspWriter of the including page.
57 */
58 public PrintWriter getWriter() throws IOException {
59 return printWriter;
60 }
61
62 public ServletOutputStream getOutputStream() throws IOException {
63 throw new IllegalStateException();
64 }
65
66 /**
67 * Clears the output buffer of the JspWriter associated with the including
68 * page.
69 */
70 public void resetBuffer() {
71 try {
72 jspWriter.clearBuffer();
73 } catch (IOException ioe) {
74 }
75 }
76 }
Save This Page