Source Code Cross Referenced for HeaderList.java in  » 6.0-JDK-Modules » j2me » gov » nist » siplite » header » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » 6.0 JDK Modules » j2me » gov.nist.siplite.header 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Portions Copyright  2000-2007 Sun Microsystems, Inc. All Rights
003:         * Reserved.  Use is subject to license terms.
004:         * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
005:         * 
006:         * This program is free software; you can redistribute it and/or
007:         * modify it under the terms of the GNU General Public License version
008:         * 2 only, as published by the Free Software Foundation.
009:         * 
010:         * This program is distributed in the hope that it will be useful, but
011:         * WITHOUT ANY WARRANTY; without even the implied warranty of
012:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
013:         * General Public License version 2 for more details (a copy is
014:         * included at /legal/license.txt).
015:         * 
016:         * You should have received a copy of the GNU General Public License
017:         * version 2 along with this work; if not, write to the Free Software
018:         * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
019:         * 02110-1301 USA
020:         * 
021:         * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
022:         * Clara, CA 95054 or visit www.sun.com if you need additional
023:         * information or have any questions.
024:         */
025:        /*
026:         */
027:        package gov.nist.siplite.header;
028:
029:        import gov.nist.core.*;
030:        import java.util.*;
031:
032:        /**
033:         * This is a list for the headers.
034:         *
035:         *
036:         * <a href="{@docRoot}/uncopyright.html">This code is in the public domain.</a>
037:         *
038:         */
039:        public class HeaderList extends Header {
040:            /** SIP header list. */
041:            protected Vector sipHeaderVector;
042:
043:            /**
044:             * Copies the current instance.
045:             * @return copy of the current instance
046:             */
047:            public Object clone() {
048:                try {
049:                    HeaderList retval = (HeaderList) this .getClass()
050:                            .newInstance();
051:                    if (this .headerName != null)
052:                        retval.headerName = new String(this .headerName);
053:                    if (this .headerValue != null)
054:                        retval.headerValue = new String(this .headerValue);
055:                    retval.sipHeaderVector = new Vector();
056:                    for (int i = 0; i < sipHeaderVector.size(); i++) {
057:                        Header siphdr = (Header) sipHeaderVector.elementAt(i);
058:                        Header newHdr = (Header) siphdr.clone();
059:                        retval.sipHeaderVector.addElement(newHdr);
060:                    }
061:                    return (Object) retval;
062:                } catch (Exception ex) {
063:                    ex.printStackTrace();
064:                    System.out.print("Problem with clone method");
065:                    System.exit(0);
066:                    return null;
067:                }
068:            }
069:
070:            /**
071:             * Default constructor
072:             */
073:            public HeaderList() {
074:                sipHeaderVector = new Vector();
075:            }
076:
077:            /**
078:             * Concatenates two compatible lists. This appends or prepends the new list
079:             * to the end of this list.
080:             * @param other HeaderList to set
081:             * @param top boolean to set
082:             */
083:            public void concatenate(HeaderList other, boolean top) {
084:                if (other != null) {
085:                    if (top) {
086:                        for (int i = 0; i < size(); i++) {
087:                            Header sipHeader = (Header) elementAt(i);
088:                            other.add(sipHeader);
089:                        }
090:                    } else {
091:                        for (int i = 0; i < other.size(); i++) {
092:                            Header sipHeader = (Header) other.elementAt(i);
093:                            add(sipHeader);
094:                        }
095:                    }
096:                }
097:            }
098:
099:            /**
100:             * Constructor with initial header.
101:             * @param sipHeaderName to set
102:             */
103:            public HeaderList(String sipHeaderName) {
104:                sipHeaderVector = new Vector();
105:                this .headerName = sipHeaderName;
106:            }
107:
108:            /**
109:             * Adds a new element.
110:             * @param sipHeader to add
111:             */
112:            public void add(Object sipHeader) throws IllegalArgumentException {
113:                if (headerName != null) {
114:                    String expandedName1 = NameMap.expandHeaderName(headerName);
115:                    String expandedName2 = NameMap
116:                            .expandHeaderName(((Header) sipHeader)
117:                                    .getHeaderName());
118:
119:                    if (!expandedName1.equalsIgnoreCase(expandedName2)) {
120:                        throw new IllegalArgumentException("bad type");
121:                    }
122:                }
123:
124:                if (sipHeader != null)
125:                    sipHeaderVector.addElement(sipHeader);
126:            }
127:
128:            /**
129:             * Adds a new element on the top of the list.
130:             * @param sipHeader to add
131:             */
132:            public void addFirst(Object sipHeader) {
133:                if (sipHeader != null) {
134:                    Vector vec = new Vector();
135:                    vec.addElement(sipHeader);
136:                    for (int i = 0; i < sipHeaderVector.size(); i++) {
137:                        vec.addElement(sipHeaderVector.elementAt(i));
138:                    }
139:                    sipHeaderVector = vec;
140:                }
141:            }
142:
143:            /**
144:             * Returns true if this is empty.
145:             * @return true if no headers in the list
146:             */
147:            public boolean isEmpty() {
148:                return sipHeaderVector.isEmpty();
149:            }
150:
151:            /**
152:             * Returns the list size.
153:             * @return size
154:             */
155:            public int size() {
156:                return sipHeaderVector.size();
157:            }
158:
159:            /**
160:             * Returns the element at the position i.
161:             * @return Object
162:             * @param i index of the requested element
163:             */
164:            public Object elementAt(int i) {
165:                return sipHeaderVector.elementAt(i);
166:            }
167:
168:            /**
169:             * Removes the specified element.
170:             * @param element entry to delete
171:             */
172:            public void removeElement(Object element) {
173:                sipHeaderVector.removeElement(element);
174:            }
175:
176:            /**
177:             * Removes the first element of the list.
178:             */
179:            public void removeFirst() {
180:                if (sipHeaderVector.size() == 0)
181:                    return;
182:                else
183:                    sipHeaderVector.removeElementAt(0);
184:
185:            }
186:
187:            /**
188:             * Removes the lastentry in the header list.
189:             */
190:            public void removeLast() {
191:                if (sipHeaderVector.size() != 0) {
192:                    sipHeaderVector.removeElementAt(sipHeaderVector.size() - 1);
193:                }
194:            }
195:
196:            /**
197:             * Returns a vector of encoded strings (one for each sipheader).
198:             * @return Vector containing encoded strings in this header list.
199:             * an empty vector is returned if this header list contains no
200:             * sip headers.
201:             */
202:            public Vector getHeadersAsEncodedStrings() {
203:                Vector retval = new Vector();
204:
205:                for (int i = 0; i < size(); i++) {
206:                    Header sipheader = (Header) elementAt(i);
207:                    retval.addElement(sipheader.encode());
208:                }
209:                return retval;
210:
211:            }
212:
213:            /**
214:             * Returns an enumeration of the imbedded vector.
215:             * @return an Enumeration of the elements of the vector.
216:             */
217:            public Enumeration getElements() {
218:                return this .sipHeaderVector.elements();
219:            }
220:
221:            /**
222:             * Gets the first element of the vector.
223:             * @return the first element of the vector.
224:             */
225:            public Header getFirst() {
226:                if (sipHeaderVector.size() == 0)
227:                    return null;
228:                return (Header) this .sipHeaderVector.elementAt(0);
229:            }
230:
231:            /**
232:             * Gets the first element of the vector.
233:             * @return the first element of the vector.
234:             */
235:            public Object first() {
236:                if (sipHeaderVector.size() == 0)
237:                    return null;
238:                return this .sipHeaderVector.elementAt(0);
239:            }
240:
241:            /**
242:             * Gets the last element of the vector.
243:             * @return the last element of the vector.
244:             */
245:            public Object last() {
246:                if (sipHeaderVector.size() == 0)
247:                    return null;
248:                else
249:                    return (Header) this .sipHeaderVector
250:                            .elementAt(sipHeaderVector.size() - 1);
251:
252:            }
253:
254:            /**
255:             * Gets the value of the header list.
256:             * @return a vector of the header list contents
257:             */
258:            public Object getValue() {
259:                Vector retval = new Vector();
260:                for (int i = 0; i < size(); i++) {
261:                    Header sipheader = (Header) elementAt(i);
262:                    retval.addElement(sipheader);
263:                }
264:                return retval;
265:            }
266:
267:            /**
268:             * Gets the parameters of the header list.
269:             *
270:             * @return always returns null
271:             */
272:            public NameValueList getParameters() {
273:                return null;
274:            }
275:
276:            /**
277:             * Encodes the contents as a string.
278:             * @return encoded string of object contents
279:             */
280:            public String encode() {
281:                if (sipHeaderVector.isEmpty() || headerName == null)
282:                    return "";
283:
284:                StringBuffer encoding = new StringBuffer();
285:
286:                // The following headers do not have comma separated forms for
287:                // multiple headers. Thus, they must be encoded separately.
288:                if (this .headerName.equals(WWW_AUTHENTICATE)
289:                        || this .headerName.equals(PROXY_AUTHENTICATE)
290:                        || this .headerName.equals(AUTHORIZATION)
291:                        || this .headerName.equals(PROXY_AUTHORIZATION)) {
292:
293:                    for (int i = 0; i < sipHeaderVector.size(); i++) {
294:                        Header sipheader = (Header) sipHeaderVector
295:                                .elementAt(i);
296:                        encoding.append(sipheader.encode());
297:                    }
298:
299:                    return encoding.toString();
300:                } else {
301:                    // These can be concatenated together in an comma separated
302:                    // list.
303:                    return headerName + Separators.COLON + Separators.SP
304:                            + this .encodeBody() + Separators.NEWLINE;
305:                }
306:            }
307:
308:            /**
309:             * Encodes body as a string.
310:             * @return encoded string of body contents
311:             */
312:            protected String encodeBody() {
313:                StringBuffer sbuf = new StringBuffer();
314:                for (int i = 0; i < sipHeaderVector.size(); i++) {
315:                    Header sipHeader = (Header) sipHeaderVector.elementAt(i);
316:                    sbuf.append(sipHeader.encodeBody());
317:                    if (i + 1 < sipHeaderVector.size())
318:                        sbuf.append(",");
319:                }
320:                return sbuf.toString();
321:            }
322:
323:            /**
324:             * Gets the header list.
325:             * @return the header list
326:             */
327:            public Vector getHeaders() {
328:                return this.sipHeaderVector;
329:            }
330:        }
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