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Java > Open Source Codes > org > apache > jetspeed > util > servlet > EcsServletResponse


1 /*
2  * Copyright 2000-2001,2004 The Apache Software Foundation.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */

16  
17 package org.apache.jetspeed.util.servlet;
18
19 import java.io.IOException JavaDoc;
20 import java.io.OutputStream JavaDoc;
21 import java.io.PrintWriter JavaDoc;
22 import javax.servlet.*;
23 import javax.servlet.http.*;
24 import java.util.Locale JavaDoc;
25
26 /**
27  *
28  * EcsServletResponse is an HttpServletResponse implementation that
29  * wraps an existing HttpServletResponse and redirects its output to
30  * an alternate OutputStream.
31  *
32  * @author <a HREF="raphael@apache.org">RaphaŽl Luta</a>
33  */

34 public class EcsServletResponse implements HttpServletResponse
35 {
36     /** The wrapped ServletResponse */
37     private HttpServletResponse rsp;
38
39     /** The new OutputStream to use */
40     private EcsServletOutputStream sout;
41
42     /** The PrintWriter to use if defined */
43     private PrintWriter JavaDoc writer;
44     
45     /** state flag: has getOutputStream() already been called ? */
46     private boolean outUsed = false;
47
48     /** state flag: has getWriter() already been called ? */
49     private boolean writerUsed = false;
50    
51     /** Build a Response
52      *
53      * @param rsp the base HttpServletResponse to wrap
54      * @param out the OutputStream to be used for writing data
55      */

56     public EcsServletResponse(HttpServletResponse rsp, OutputStream JavaDoc out) {
57         this.rsp = rsp;
58         this.sout = new EcsServletOutputStream(out);
59     }
60
61     /**
62      * @see javax.servlet.ServletResponse#getCharacterEncoding
63      */

64     public String JavaDoc getCharacterEncoding()
65     {
66         return rsp.getCharacterEncoding();
67     }
68     
69     /**
70      * @see javax.servlet.ServletResponse#getOutputStream
71      */

72     public ServletOutputStream getOutputStream() throws IOException JavaDoc
73     {
74         if (writerUsed)
75         {
76             throw new IllegalStateException JavaDoc("Writer already used");
77         }
78
79         this.outUsed = true;
80
81         return this.sout;
82     }
83     
84     /**
85      * @see javax.servlet.ServletResponse#getWriter
86      */

87     public PrintWriter JavaDoc getWriter() throws IOException JavaDoc
88     {
89         if (outUsed)
90         {
91             throw new IllegalStateException JavaDoc("OutputStream already in use");
92         }
93         
94         if (writer==null)
95         {
96             this.writer = new PrintWriter JavaDoc(this.sout);
97         }
98     
99         this.writerUsed = true;
100         
101         return writer;
102     }
103     
104     /**
105      * @see javax.servlet.ServletResponse#setContentLength
106      */

107     public void setContentLength(int len)
108     {
109         // silently fail
110
}
111     
112     /**
113      * @see javax.servlet.ServletResponse#setContentType
114      */

115     public void setContentType(String JavaDoc type)
116     {
117         // silently fail
118
}
119     
120     /**
121      * @see javax.servlet.ServletResponse#setBufferSize
122      */

123     public void setBufferSize(int size)
124     {
125         // silently fail
126
}
127     
128     /**
129      * @see javax.servlet.ServletResponse#getBufferSize
130      */

131     public int getBufferSize()
132     {
133         return rsp.getBufferSize();
134     }
135     
136     /**
137      * @see javax.servlet.ServletResponse#flushBuffer
138      */

139     public void flushBuffer() throws IOException JavaDoc
140     {
141         this.sout.flush();
142     }
143     
144     /**
145      * @see javax.servlet.ServletResponse#isCommitted
146      */

147     public boolean isCommitted()
148     {
149         // we don't implement reset() so always claim
150
// the data is committed
151
return true;
152     }
153     
154     /**
155      * @see javax.servlet.ServletResponse#reset
156      */

157     public void reset()
158     {
159         // silently fail
160
}
161
162     /**
163      * @see javax.servlet.ServletResponse#setLocale
164      */

165     public void setLocale(Locale JavaDoc loc)
166     {
167         // we can safely ignore this
168
}
169     
170     /**
171      * @see javax.servlet.ServletResponse#getLocale
172      */

173     public Locale JavaDoc getLocale()
174     {
175         return rsp.getLocale();
176     }
177
178     /**
179      * @see javax.servlet.http.HttpServletResponse#addCookie
180      */

181     public void addCookie(Cookie cookie)
182     {
183         rsp.addCookie(cookie);
184     }
185
186     /**
187      * @see javax.servlet.http.HttpServletResponse#containsHeader
188      */

189     public boolean containsHeader(String JavaDoc name)
190     {
191         return rsp.containsHeader(name);
192     }
193
194     /**
195      * @see javax.servlet.http.HttpServletResponse#encodeURL
196      */

197     public String JavaDoc encodeURL(String JavaDoc url)
198     {
199         return rsp.encodeURL(url);
200     }
201
202     /**
203      * @see javax.servlet.http.HttpServletResponse#encodeRedirectURL
204      */

205     public String JavaDoc encodeRedirectURL(String JavaDoc url)
206     {
207         return rsp.encodeRedirectURL(url);
208     }
209
210     /**
211      * @see javax.servlet.http.HttpServletResponse#encodeUrl
212      */

213     public String JavaDoc encodeUrl(String JavaDoc url)
214     {
215         return rsp.encodeUrl(url);
216     }
217     
218     /**
219      * @see javax.servlet.http.HttpServletResponse#encodeRedirectUrl
220      */

221     public String JavaDoc encodeRedirectUrl(String JavaDoc url)
222     {
223         return rsp.encodeRedirectUrl(url);
224     }
225
226     /**
227      * @see javax.servlet.http.HttpServletResponse#sendError
228      */

229     public void sendError(int sc, String JavaDoc msg) throws IOException JavaDoc
230     {
231         // silently fail
232
}
233
234     /**
235      * @see javax.servlet.http.HttpServletResponse#sendError
236      */

237     public void sendError(int sc) throws IOException JavaDoc
238     {
239         // silently fail
240
}
241
242     /**
243      * @see javax.servlet.http.HttpServletResponse#sendRedirect
244      */

245     public void sendRedirect(String JavaDoc location) throws IOException JavaDoc
246     {
247         // silently fail
248
}
249     
250     /**
251      * @see javax.servlet.http.HttpServletResponse#setDateHeader
252      */

253     public void setDateHeader(String JavaDoc name, long date)
254     {
255         // silently fail
256
}
257     
258     /**
259      * @see javax.servlet.http.HttpServletResponse#addDateHeader
260      */

261     public void addDateHeader(String JavaDoc name, long date)
262     {
263         // silently fail
264
}
265     
266     /**
267      * @see javax.servlet.http.HttpServletResponse#setHeader
268      */

269     public void setHeader(String JavaDoc name, String JavaDoc value)
270     {
271         // silently fail
272
}
273     
274     /**
275      * @see javax.servlet.http.HttpServletResponse#addHeader
276      */

277     public void addHeader(String JavaDoc name, String JavaDoc value)
278     {
279         // silently fail
280
}
281
282     /**
283      * @see javax.servlet.http.HttpServletResponse#setIntHeader
284      */

285     public void setIntHeader(String JavaDoc name, int value)
286     {
287         // silently fail
288
}
289
290     /**
291      * @see javax.servlet.http.HttpServletResponse#addIntHeader
292      */

293     public void addIntHeader(String JavaDoc name, int value)
294     {
295         // silently fail
296
}
297
298     /**
299      * @see javax.servlet.http.HttpServletResponse#setStatus
300      */

301     public void setStatus(int sc)
302     {
303         // silently fail
304
}
305   
306     /**
307      * @see javax.servlet.http.HttpServletResponse#setStatus
308      */

309     public void setStatus(int sc, String JavaDoc sm)
310     {
311         // silently fail
312
}
313
314     public void resetBuffer()
315     {
316         // silently fail
317
//added by Ben Woodward
318
}
319
320 }
321
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