Source Code Cross Referenced for ScopedResponseImpl.java in  » Library » Apache-beehive-1.0.2-src » org » apache » beehive » netui » pageflow » scoping » internal » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Library » Apache beehive 1.0.2 src » org.apache.beehive.netui.pageflow.scoping.internal 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Licensed to the Apache Software Foundation (ASF) under one or more
003:         * contributor license agreements.  See the NOTICE file distributed with
004:         * this work for additional information regarding copyright ownership.
005:         * The ASF licenses this file to You under the Apache License, Version 2.0
006:         * (the "License"); you may not use this file except in compliance with
007:         * the License.  You may obtain a copy of the License at
008:         * 
009:         *     http://www.apache.org/licenses/LICENSE-2.0
010:         * 
011:         * Unless required by applicable law or agreed to in writing, software
012:         * distributed under the License is distributed on an "AS IS" BASIS,
013:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014:         * See the License for the specific language governing permissions and
015:         * limitations under the License.
016:         *
017:         * $Header:$
018:         */
019:        package org.apache.beehive.netui.pageflow.scoping.internal;
020:
021:        import org.apache.beehive.netui.pageflow.scoping.ScopedResponse;
022:        import org.apache.beehive.netui.util.logging.Logger;
023:
024:        import javax.servlet.http.HttpServletResponse;
025:        import javax.servlet.http.HttpServletResponseWrapper;
026:        import javax.servlet.http.Cookie;
027:        import java.io.IOException;
028:        import java.util.HashMap;
029:        import java.util.Date;
030:        import java.util.ArrayList;
031:        import java.util.List;
032:        import java.util.Map;
033:
034:        /**
035:         * A wrapper around HttpServletResponse, associated with a given scope-key.  Delegates to the wrapped
036:         * response object for some functionality, but prevents output or error codes or forwards from actually
037:         * happening.
038:         */
039:        public class ScopedResponseImpl extends HttpServletResponseWrapper
040:                implements  ScopedResponse {
041:            private static final Cookie[] NO_COOKIES = new Cookie[0];
042:
043:            private boolean _isError = false;
044:            private int _statusCode = -1;
045:            private String _redirectURI = null;
046:            private String _statusMessage = null;
047:
048:            /** Map of name (String) -> headers (List).  There can be more than one for each name. **/
049:            private HashMap _headers = new HashMap();
050:
051:            private static final String SET_COOKIE = "Set-Cookie";
052:            private static final Logger logger = Logger
053:                    .getInstance(ScopedResponseImpl.class);
054:
055:            public ScopedResponseImpl(HttpServletResponse servletResponse) {
056:                super (servletResponse);
057:            }
058:
059:            public void sendError(int i, String s) throws IOException {
060:                _isError = true;
061:                _statusCode = i;
062:                _statusMessage = s;
063:
064:                if (logger.isInfoEnabled()) {
065:                    StringBuffer msg = new StringBuffer("ScopedResponse error ")
066:                            .append(i);
067:                    logger.info(msg.append(": ").append(s));
068:                }
069:            }
070:
071:            public void sendError(int i) throws IOException {
072:                sendError(i, "");
073:            }
074:
075:            public void setStatus(int i) {
076:                setStatus(i, "");
077:            }
078:
079:            public void setStatus(int i, String s) {
080:                _statusCode = i;
081:                _statusMessage = s;
082:            }
083:
084:            public void setContentLength(int i) {
085:                // don't do anything
086:            }
087:
088:            public void setContentType(String s) {
089:                // don't do anything
090:            }
091:
092:            public void setBufferSize(int i) {
093:                // don't do anything
094:            }
095:
096:            public void resetBuffer() {
097:                // don't do anything
098:            }
099:
100:            public void reset() {
101:                // don't do anything
102:            }
103:
104:            //
105:            // Headers: We need some special handling for headers. Since we're
106:            // *including* portlets, the response received from WLS will have
107:            // no-op methods for all headers. So, this implementation collects
108:            // headers explicitly, to avoid losing them.
109:            //
110:
111:            /**
112:             * Add a cookie to the response.
113:             */
114:            public void addCookie(Cookie cookie) {
115:                addObjectHeader(SET_COOKIE, cookie);
116:            }
117:
118:            /**
119:             * Gets a cookie that was added to the response.
120:             */
121:            public Cookie getCookie(String cookieName) {
122:                List cookies = getHeaders(SET_COOKIE);
123:                if (cookies != null) {
124:                    // start looking from the back (ie. the last cookie set)
125:                    for (int i = cookies.size(); --i > -1;) {
126:                        Cookie cookie = (Cookie) cookies.get(i);
127:                        if (cookie.getName().equals(cookieName)) {
128:                            return cookie;
129:                        }
130:                    }
131:                }
132:
133:                return null;
134:            }
135:
136:            /**
137:             * Gets all Cookies that were added to the response.
138:             */
139:            public Cookie[] getCookies() {
140:                List cookies = (List) _headers.get(SET_COOKIE);
141:                return cookies != null ? (Cookie[]) cookies
142:                        .toArray(new Cookie[cookies.size()]) : NO_COOKIES;
143:            }
144:
145:            /**
146:             * Returns <code>true</code> if this response containes the given header.
147:             */
148:            public boolean containsHeader(String name) {
149:                return _headers.containsKey(name);
150:            }
151:
152:            /**
153:             * Sets a response header with the given name and date-value.
154:             */
155:            public void setDateHeader(String name, long date) {
156:                setObjectHeader(name, new Date(date));
157:            }
158:
159:            /**
160:             * Adds a response header with the given name and date-value.
161:             */
162:            public void addDateHeader(String name, long date) {
163:                addObjectHeader(name, new Date(date));
164:            }
165:
166:            /**
167:             * Sets a response header with the given name and value.
168:             */
169:            public void setHeader(String name, String value) {
170:                setObjectHeader(name, value);
171:            }
172:
173:            /**
174:             * Adds a response header with the given name and value.
175:             */
176:            public void addHeader(String name, String value) {
177:                addObjectHeader(name, value);
178:            }
179:
180:            /**
181:             * Sets a response header with the given name and integer value.
182:             */
183:            public void setIntHeader(String name, int value) {
184:                setObjectHeader(name, new Integer(value));
185:            }
186:
187:            /**
188:             * Adds a response header with the given name and integer value.
189:             */
190:            public void addIntHeader(String name, int value) {
191:                addObjectHeader(name, new Integer(value));
192:            }
193:
194:            /**
195:             * Gets all headers.
196:             *
197:             * @return a Map of header-name (String) -> headers (List).
198:             */
199:            public Map getHeaders() {
200:                return _headers;
201:            }
202:
203:            /**
204:             * Gets all headers with the given name.
205:             *
206:             * @return a List of headers (String, Integer, Date, Cookie), or <code>null</code> if none are found.
207:             */
208:            public List getHeaders(String name) {
209:                return (List) _headers.get(name);
210:            }
211:
212:            /**
213:             * Gets the first header with the given name.
214:             * @return an Object (String, Integer, Date, Cookie) that is the first header with the given name,
215:             *         or <code>null</code> if none is found.
216:             */
217:            public Object getFirstHeader(String name) {
218:                List foundHeaders = (List) _headers.get(name);
219:                return !foundHeaders.isEmpty() ? foundHeaders.get(0) : null;
220:            }
221:
222:            protected void addObjectHeader(String name, Object val) {
223:                List vals = (List) _headers.get(name);
224:
225:                if (vals == null) {
226:                    vals = new ArrayList();
227:                    _headers.put(name, vals);
228:                }
229:
230:                vals.add(val);
231:            }
232:
233:            protected void setObjectHeader(String name, Object val) {
234:                ArrayList vals = new ArrayList();
235:                vals.add(val);
236:                _headers.put(name, vals);
237:            }
238:
239:            public HttpServletResponse getOuterResponse() {
240:                return (HttpServletResponse) getResponse();
241:            }
242:
243:            public boolean isError() {
244:                return _isError;
245:            }
246:
247:            public int getStatusCode() {
248:                return _statusCode;
249:            }
250:
251:            public String getStatusMessage() {
252:                return _statusMessage;
253:            }
254:
255:            public void sendRedirect(String redirectURI) throws IOException {
256:                _redirectURI = redirectURI;
257:            }
258:
259:            /**
260:             * Actually send the redirect that was suggested by {@link #sendRedirect}.
261:             *
262:             * @throws IllegalStateException if {@link #sendRedirect} was not called.
263:             */
264:            public void applyRedirect() throws IOException {
265:                if (_redirectURI != null) {
266:                    super .sendRedirect(_redirectURI);
267:                } else {
268:                    throw new IllegalStateException("No redirect to apply.");
269:                }
270:            }
271:
272:            public boolean didRedirect() {
273:                return _redirectURI != null;
274:            }
275:
276:            public String getRedirectURI() {
277:                return _redirectURI;
278:            }
279:        }
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