Source Code Cross Referenced for BinaryDataInput.java in  » 6.0-JDK-Modules » Java-Advanced-Imaging » jj2000 » j2k » io » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » 6.0 JDK Modules » Java Advanced Imaging » jj2000.j2k.io 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * $RCSfile: BinaryDataInput.java,v $
003:         * $Revision: 1.1 $
004:         * $Date: 2005/02/11 05:02:15 $
005:         * $State: Exp $
006:         *
007:         * Interface:           BinaryDataInput
008:         *
009:         * Description:         Stream like interface for binary
010:         *                      input from a stream or file.
011:         *
012:         *
013:         *
014:         * COPYRIGHT:
015:         *
016:         * This software module was originally developed by Raphaël Grosbois and
017:         * Diego Santa Cruz (Swiss Federal Institute of Technology-EPFL); Joel
018:         * Askelöf (Ericsson Radio Systems AB); and Bertrand Berthelot, David
019:         * Bouchard, Félix Henry, Gerard Mozelle and Patrice Onno (Canon Research
020:         * Centre France S.A) in the course of development of the JPEG2000
021:         * standard as specified by ISO/IEC 15444 (JPEG 2000 Standard). This
022:         * software module is an implementation of a part of the JPEG 2000
023:         * Standard. Swiss Federal Institute of Technology-EPFL, Ericsson Radio
024:         * Systems AB and Canon Research Centre France S.A (collectively JJ2000
025:         * Partners) agree not to assert against ISO/IEC and users of the JPEG
026:         * 2000 Standard (Users) any of their rights under the copyright, not
027:         * including other intellectual property rights, for this software module
028:         * with respect to the usage by ISO/IEC and Users of this software module
029:         * or modifications thereof for use in hardware or software products
030:         * claiming conformance to the JPEG 2000 Standard. Those intending to use
031:         * this software module in hardware or software products are advised that
032:         * their use may infringe existing patents. The original developers of
033:         * this software module, JJ2000 Partners and ISO/IEC assume no liability
034:         * for use of this software module or modifications thereof. No license
035:         * or right to this software module is granted for non JPEG 2000 Standard
036:         * conforming products. JJ2000 Partners have full right to use this
037:         * software module for his/her own purpose, assign or donate this
038:         * software module to any third party and to inhibit third parties from
039:         * using this software module for non JPEG 2000 Standard conforming
040:         * products. This copyright notice must be included in all copies or
041:         * derivative works of this software module.
042:         *
043:         * Copyright (c) 1999/2000 JJ2000 Partners.
044:         *
045:         *
046:         *
047:         */
048:
049:        package jj2000.j2k.io;
050:
051:        import java.io.*;
052:
053:        /**
054:         * This interface defines the input of binary data from streams and/or files.
055:         *
056:         * <P>Byte level input (i.e., for byte, int, long, float, etc.) should
057:         * always be byte aligned. For example, a request to read an
058:         * <tt>int</tt> should always realign the input at the byte level.
059:         *
060:         * <P>The implementation of this interface should clearly define if
061:         * multi-byte input data is read in little- or big-endian byte
062:         * ordering (least significant byte first or most significant byte
063:         * first, respectively).
064:         *
065:         * @see EndianType
066:         * */
067:        public interface BinaryDataInput {
068:
069:            /**
070:             * Should read a signed byte (i.e., 8 bit) from the input.
071:             * reading, the input should be realigned at the byte level.
072:             *
073:             * @return The next byte-aligned signed byte (8 bit) from the
074:             * input.
075:             *
076:             * @exception EOFException If the end-of file was reached before
077:             * getting all the necessary data.
078:             *
079:             * @exception IOException If an I/O error ocurred.
080:             *
081:             *
082:             * */
083:            public byte readByte() throws EOFException, IOException;
084:
085:            /**
086:             * Should read an unsigned byte (i.e., 8 bit) from the input. It is
087:             * returned as an <tt>int</tt> since Java does not have an
088:             * unsigned byte type. Prior to reading, the input should be
089:             * realigned at the byte level.
090:             *
091:             * @return The next byte-aligned unsigned byte (8 bit) from the
092:             * input, as an <tt>int</tt>.
093:             *
094:             * @exception EOFException If the end-of file was reached before
095:             * getting all the necessary data.
096:             *
097:             * @exception IOException If an I/O error ocurred.
098:             *
099:             *
100:             *
101:             */
102:            public int readUnsignedByte() throws EOFException, IOException;
103:
104:            /**
105:             * Should read a signed short (i.e., 16 bit) from the input. Prior to
106:             * reading, the input should be realigned at the byte level.
107:             *
108:             * @return The next byte-aligned signed short (16 bit) from the
109:             * input.
110:             *
111:             * @exception EOFException If the end-of file was reached before
112:             * getting all the necessary data.
113:             *
114:             * @exception IOException If an I/O error ocurred.
115:             *
116:             *
117:             *
118:             */
119:            public short readShort() throws EOFException, IOException;
120:
121:            /**
122:             * Should read an unsigned short (i.e., 16 bit) from the input. It is
123:             * returned as an <tt>int</tt> since Java does not have an
124:             * unsigned short type. Prior to reading, the input should be
125:             * realigned at the byte level.
126:             *
127:             * @return The next byte-aligned unsigned short (16 bit) from the
128:             * input, as an <tt>int</tt>.
129:             *
130:             * @exception EOFException If the end-of file was reached before
131:             * getting all the necessary data.
132:             *
133:             * @exception IOException If an I/O error ocurred.
134:             *
135:             *
136:             *
137:             */
138:            public int readUnsignedShort() throws EOFException, IOException;
139:
140:            /**
141:             * Should read a signed int (i.e., 32 bit) from the input. Prior to
142:             * reading, the input should be realigned at the byte level.
143:             *
144:             * @return The next byte-aligned signed int (32 bit) from the
145:             * input.
146:             *
147:             * @exception EOFException If the end-of file was reached before
148:             * getting all the necessary data.
149:             *
150:             * @exception IOException If an I/O error ocurred.
151:             *
152:             *
153:             *
154:             */
155:            public int readInt() throws EOFException, IOException;
156:
157:            /**
158:             * Should read an unsigned int (i.e., 32 bit) from the input. It is
159:             * returned as a <tt>long</tt> since Java does not have an
160:             * unsigned short type. Prior to reading, the input should be
161:             * realigned at the byte level.
162:             *
163:             * @return The next byte-aligned unsigned int (32 bit) from the
164:             * input, as a <tt>long</tt>.
165:             *
166:             * @exception EOFException If the end-of file was reached before
167:             * getting all the necessary data.
168:             *
169:             * @exception IOException If an I/O error ocurred.
170:             *
171:             *
172:             *
173:             */
174:            public long readUnsignedInt() throws EOFException, IOException;
175:
176:            /**
177:             * Should read a signed long (i.e., 64 bit) from the input. Prior to
178:             * reading, the input should be realigned at the byte level.
179:             *
180:             * @return The next byte-aligned signed long (64 bit) from the
181:             * input.
182:             *
183:             * @exception EOFException If the end-of file was reached before
184:             * getting all the necessary data.
185:             *
186:             * @exception IOException If an I/O error ocurred.
187:             *
188:             *
189:             *
190:             */
191:            public long readLong() throws EOFException, IOException;
192:
193:            /**
194:             * Should read an IEEE single precision (i.e., 32 bit)
195:             * floating-point number from the input. Prior to reading, the
196:             * input should be realigned at the byte level.
197:             *
198:             * @return The next byte-aligned IEEE float (32 bit) from the
199:             * input.
200:             *
201:             * @exception EOFException If the end-of file was reached before
202:             * getting all the necessary data.
203:             *
204:             * @exception IOException If an I/O error ocurred.
205:             *
206:             *
207:             *
208:             */
209:            public float readFloat() throws EOFException, IOException;
210:
211:            /**
212:             * Should read an IEEE double precision (i.e., 64 bit)
213:             * floating-point number from the input. Prior to reading, the
214:             * input should be realigned at the byte level.
215:             *
216:             * @return The next byte-aligned IEEE double (64 bit) from the
217:             * input.
218:             *
219:             * @exception EOFException If the end-of file was reached before
220:             * getting all the necessary data.
221:             *
222:             * @exception IOException If an I/O error ocurred.
223:             *
224:             *
225:             *
226:             */
227:            public double readDouble() throws EOFException, IOException;
228:
229:            /**
230:             * Returns the endianess (i.e., byte ordering) of the implementing
231:             * class. Note that an implementing class may implement only one
232:             * type of endianness or both, which would be decided at creatiuon
233:             * time.
234:             *
235:             * @return Either <tt>EndianType.BIG_ENDIAN</tt> or
236:             * <tt>EndianType.LITTLE_ENDIAN</tt>
237:             *
238:             * @see EndianType
239:             *
240:             *
241:             *
242:             */
243:            public int getByteOrdering();
244:
245:            /**
246:             * Skips <tt>n</tt> bytes from the input. Prior to skipping, the
247:             * input should be realigned at the byte level.
248:             *
249:             * @param n The number of bytes to skip
250:             *
251:             * @exception EOFException If the end-of file was reached before
252:             * all the bytes could be skipped.
253:             *
254:             * @exception IOException If an I/O error ocurred.
255:             *
256:             *
257:             *
258:             */
259:            public int skipBytes(int n) throws EOFException, IOException;
260:
261:        }
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