Source Code Cross Referenced for StreamMessageImpl.java in  » EJB-Server-resin-3.1.5 » resin » com » caucho » jms » message » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » EJB Server resin 3.1.5 » resin » com.caucho.jms.message 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
003:         *
004:         * This file is part of Resin(R) Open Source
005:         *
006:         * Each copy or derived work must preserve the copyright notice and this
007:         * notice unmodified.
008:         *
009:         * Resin Open Source is free software; you can redistribute it and/or modify
010:         * it under the terms of the GNU General Public License as published by
011:         * the Free Software Foundation; either version 2 of the License, or
012:         * (at your option) any later version.
013:         *
014:         * Resin Open Source is distributed in the hope that it will be useful,
015:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
016:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
017:         * of NON-INFRINGEMENT.  See the GNU General Public License for more
018:         * details.
019:         *
020:         * You should have received a copy of the GNU General Public License
021:         * along with Resin Open Source; if not, write to the
022:         *
023:         *   Free Software Foundation, Inc.
024:         *   59 Temple Place, Suite 330
025:         *   Boston, MA 02111-1307  USA
026:         *
027:         * @author Scott Ferguson
028:         */
029:
030:        package com.caucho.jms.message;
031:
032:        import javax.jms.JMSException;
033:        import javax.jms.MessageEOFException;
034:        import javax.jms.StreamMessage;
035:        import java.util.ArrayList;
036:        import java.io.*;
037:
038:        import com.caucho.vfs.*;
039:        import com.caucho.hessian.io.*;
040:
041:        /**
042:         * A stream message.
043:         */
044:        public class StreamMessageImpl extends MessageImpl implements 
045:                StreamMessage {
046:            private ArrayList<Object> _values = new ArrayList<Object>();
047:            private int _index;
048:            private byte[] _bytes;
049:            private int _bytesOffset;
050:
051:            public StreamMessageImpl() {
052:            }
053:
054:            StreamMessageImpl(StreamMessage stream) throws JMSException {
055:                super (stream);
056:
057:                try {
058:                    stream.reset();
059:
060:                    Object value;
061:                    while (true) {
062:                        writeObject(stream.readObject());
063:                    }
064:                } catch (MessageEOFException e) {
065:                }
066:
067:                reset();
068:            }
069:
070:            StreamMessageImpl(StreamMessageImpl stream) {
071:                super (stream);
072:
073:                _values.addAll(stream._values);
074:
075:                try {
076:                    reset();
077:                } catch (Exception e) {
078:                    throw new RuntimeException(e);
079:                }
080:            }
081:
082:            /**
083:             * Returns the type enumeration.
084:             */
085:            @Override
086:            public MessageType getType() {
087:                return MessageType.STREAM;
088:            }
089:
090:            /**
091:             * Sets the body for reading.
092:             */
093:            public void setReceive() throws JMSException {
094:                super .setReceive();
095:
096:                reset();
097:            }
098:
099:            /**
100:             * Set the stream for reading.
101:             */
102:            public void reset() throws JMSException {
103:                setBodyReadOnly();
104:
105:                _index = 0;
106:                _bytes = null;
107:                _bytesOffset = 0;
108:            }
109:
110:            /**
111:             * Read a boolean from the stream.
112:             */
113:            public boolean readBoolean() throws JMSException {
114:                boolean value = ObjectConverter.toBoolean(readObjectImpl());
115:
116:                _index++;
117:
118:                return value;
119:            }
120:
121:            /**
122:             * Read a byte from the stream.
123:             */
124:            public byte readByte() throws JMSException {
125:                byte value = ObjectConverter.toByte(readObjectImpl());
126:
127:                _index++;
128:
129:                return value;
130:            }
131:
132:            /**
133:             * Read a short from the stream.
134:             */
135:            public short readShort() throws JMSException {
136:                short value = ObjectConverter.toShort(readObjectImpl());
137:
138:                _index++;
139:
140:                return value;
141:            }
142:
143:            /**
144:             * Read an integer from the stream.
145:             */
146:            public int readInt() throws JMSException {
147:                int value = ObjectConverter.toInt(readObjectImpl());
148:
149:                _index++;
150:
151:                return value;
152:            }
153:
154:            /**
155:             * Read a long from the stream.
156:             */
157:            public long readLong() throws JMSException {
158:                long value = ObjectConverter.toLong(readObjectImpl());
159:
160:                _index++;
161:
162:                return value;
163:            }
164:
165:            /**
166:             * Read a float from the stream.
167:             */
168:            public float readFloat() throws JMSException {
169:                float value = ObjectConverter.toFloat(readObjectImpl());
170:
171:                _index++;
172:
173:                return value;
174:            }
175:
176:            /**
177:             * Read a double from the stream.
178:             */
179:            public double readDouble() throws JMSException {
180:                double value = ObjectConverter.toDouble(readObjectImpl());
181:
182:                _index++;
183:
184:                return value;
185:            }
186:
187:            /**
188:             * Read a character object from the stream.
189:             */
190:            public char readChar() throws JMSException {
191:                char value = ObjectConverter.toChar(readObjectImpl());
192:
193:                _index++;
194:
195:                return value;
196:            }
197:
198:            /**
199:             * Read a string from the stream.
200:             */
201:            public String readString() throws JMSException {
202:                String value = ObjectConverter.toString(readObjectImpl());
203:
204:                _index++;
205:
206:                return value;
207:            }
208:
209:            /**
210:             * Read a byte array object from the stream.
211:             */
212:            public int readBytes(byte[] value) throws JMSException {
213:                byte[] bytes;
214:
215:                if (_bytes != null) {
216:                    if (_bytesOffset == _bytes.length) {
217:                        _bytes = null;
218:                        _bytesOffset = 0;
219:                        return -1;
220:                    }
221:                } else {
222:                    _bytes = ObjectConverter.toBytes(readObjectImpl());
223:                    _index++;
224:                }
225:
226:                if (_bytes == null)
227:                    return -1;
228:
229:                int sublen = _bytes.length - _bytesOffset;
230:                if (value.length < sublen)
231:                    sublen = value.length;
232:
233:                for (int i = 0; i < sublen; i++)
234:                    value[i] = _bytes[_bytesOffset++];
235:
236:                return sublen;
237:            }
238:
239:            /**
240:             * Reads the next object.
241:             */
242:            public Object readObject() throws JMSException {
243:                Object value = readObjectImpl();
244:
245:                _index++;
246:
247:                return value;
248:            }
249:
250:            /**
251:             * Reads the next object.
252:             */
253:            private Object readObjectImpl() throws JMSException {
254:                checkBodyReadable();
255:
256:                if (_values.size() <= _index)
257:                    throw new MessageEOFException(L
258:                            .l("end of message in stream"));
259:
260:                _bytes = null;
261:                _bytesOffset = 0;
262:
263:                return _values.get(_index);
264:            }
265:
266:            /**
267:             * Clears the message and puts it into write mode.
268:             */
269:            public void clearBody() throws JMSException {
270:                super .clearBody();
271:
272:                _values.clear();
273:                _index = 0;
274:                _bytes = null;
275:                _bytesOffset = 0;
276:            }
277:
278:            /**
279:             * Writes a boolean to the stream.
280:             */
281:            public void writeBoolean(boolean b) throws JMSException {
282:                writeObject(new Boolean(b));
283:            }
284:
285:            /**
286:             * Writes a byte to the stream.
287:             */
288:            public void writeByte(byte b) throws JMSException {
289:                writeObject(new Byte(b));
290:            }
291:
292:            /**
293:             * Writes a short to the stream.
294:             */
295:            public void writeShort(short s) throws JMSException {
296:                writeObject(new Short(s));
297:            }
298:
299:            /**
300:             * Writes an integer to the stream.
301:             */
302:            public void writeInt(int i) throws JMSException {
303:                writeObject(new Integer(i));
304:            }
305:
306:            /**
307:             * Writes a long to the stream.
308:             */
309:            public void writeLong(long l) throws JMSException {
310:                writeObject(new Long(l));
311:            }
312:
313:            /**
314:             * Writes a float to the stream.
315:             */
316:            public void writeFloat(float f) throws JMSException {
317:                writeObject(new Float(f));
318:            }
319:
320:            /**
321:             * Writes a double to the stream.
322:             */
323:            public void writeDouble(double d) throws JMSException {
324:                writeObject(new Double(d));
325:            }
326:
327:            /**
328:             * Writes a string to the stream.
329:             */
330:            public void writeString(String s) throws JMSException {
331:                writeObject(s);
332:            }
333:
334:            /**
335:             * Writes a character to the stream.
336:             */
337:            public void writeChar(char ch) throws JMSException {
338:                writeObject(new Character(ch));
339:            }
340:
341:            /**
342:             * Writes a byte array to the stream.
343:             */
344:            public void writeBytes(byte[] buf) throws JMSException {
345:                writeBytes(buf, 0, buf.length);
346:            }
347:
348:            /**
349:             * Writes a byte array to the stream.
350:             */
351:            public void writeBytes(byte[] buf, int offset, int length)
352:                    throws JMSException {
353:                byte[] newBuf = new byte[length];
354:
355:                System.arraycopy(buf, offset, newBuf, 0, length);
356:
357:                writeObject(newBuf);
358:            }
359:
360:            /**
361:             * Writes the next object.
362:             */
363:            public void writeObject(Object obj) throws JMSException {
364:                checkBodyWriteable();
365:
366:                _values.add(obj);
367:            }
368:
369:            @Override
370:            public MessageImpl copy() {
371:                return new StreamMessageImpl(this );
372:            }
373:
374:            protected void copy(StreamMessageImpl newMsg) {
375:                super .copy(newMsg);
376:
377:                newMsg._values = new ArrayList(_values);
378:                newMsg._index = 0;
379:            }
380:
381:            /**
382:             * Serialize the body to an input stream.
383:             */
384:            @Override
385:            public InputStream bodyToInputStream() throws IOException {
386:                if (_values == null || _values.size() == 0)
387:                    return null;
388:
389:                TempStream body = new TempStream();
390:                body.openWrite();
391:
392:                StreamImplOutputStream ws = new StreamImplOutputStream(body);
393:
394:                Hessian2Output out = new Hessian2Output(ws);
395:
396:                out.writeObject(_values);
397:
398:                out.close();
399:
400:                ws.close();
401:
402:                return body.openRead();
403:            }
404:
405:            /**
406:             * Read the body from an input stream.
407:             */
408:            @Override
409:            public void readBody(InputStream is) throws IOException,
410:                    JMSException {
411:                if (is != null) {
412:                    Hessian2Input in = new Hessian2Input(is);
413:
414:                    _values = (ArrayList<Object>) in.readObject();
415:
416:                    in.close();
417:                }
418:
419:                reset();
420:            }
421:
422:            public String toString() {
423:                return "StreamMessageImpl[]";
424:            }
425:        }
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