001: /*
002: * $RCSfile: StreamMsgLogger.java,v $
003: * $Revision: 1.1 $
004: * $Date: 2005/02/11 05:02:26 $
005: * $State: Exp $
006: *
007: * Class: StreamMsgLogger
008: *
009: * Description: Implementation of MsgLogger for streams
010: *
011: *
012: *
013: * COPYRIGHT:
014: *
015: * This software module was originally developed by Raphaël Grosbois and
016: * Diego Santa Cruz (Swiss Federal Institute of Technology-EPFL); Joel
017: * Askelöf (Ericsson Radio Systems AB); and Bertrand Berthelot, David
018: * Bouchard, Félix Henry, Gerard Mozelle and Patrice Onno (Canon Research
019: * Centre France S.A) in the course of development of the JPEG2000
020: * standard as specified by ISO/IEC 15444 (JPEG 2000 Standard). This
021: * software module is an implementation of a part of the JPEG 2000
022: * Standard. Swiss Federal Institute of Technology-EPFL, Ericsson Radio
023: * Systems AB and Canon Research Centre France S.A (collectively JJ2000
024: * Partners) agree not to assert against ISO/IEC and users of the JPEG
025: * 2000 Standard (Users) any of their rights under the copyright, not
026: * including other intellectual property rights, for this software module
027: * with respect to the usage by ISO/IEC and Users of this software module
028: * or modifications thereof for use in hardware or software products
029: * claiming conformance to the JPEG 2000 Standard. Those intending to use
030: * this software module in hardware or software products are advised that
031: * their use may infringe existing patents. The original developers of
032: * this software module, JJ2000 Partners and ISO/IEC assume no liability
033: * for use of this software module or modifications thereof. No license
034: * or right to this software module is granted for non JPEG 2000 Standard
035: * conforming products. JJ2000 Partners have full right to use this
036: * software module for his/her own purpose, assign or donate this
037: * software module to any third party and to inhibit third parties from
038: * using this software module for non JPEG 2000 Standard conforming
039: * products. This copyright notice must be included in all copies or
040: * derivative works of this software module.
041: *
042: * Copyright (c) 1999/2000 JJ2000 Partners.
043: *
044: *
045: *
046: */
047:
048: package jj2000.j2k.util;
049:
050: import java.io.*;
051:
052: /**
053: * This class implements the MsgLogger interface for streams. Streams can
054: * be simple files, terminals, stdout, stderr, etc. The messages or simple
055: * strings are formatted using the linewidth given to the constructor.
056: *
057: * <P>Messages are printed to the 'err' stream if they are of severity WARNING
058: * or ERROR, otherwise they are printed to the 'out' stream. Simple strings
059: * are always printed the 'out' stream.
060: * */
061: public class StreamMsgLogger implements MsgLogger {
062:
063: /** The 'out' stream */
064: private PrintWriter out;
065:
066: /** The 'err' stream */
067: private PrintWriter err;
068:
069: /** The printer that formats the text */
070: private MsgPrinter mp;
071:
072: /**
073: * Constructs a StreamMsgLogger that uses 'outstr' as the 'out' stream,
074: * and 'errstr' as the 'err' stream. Note that 'outstr' and 'errstr' can
075: * be System.out and System.err.
076: *
077: * @param outstr Where to print simple strings and LOG and INFO messages.
078: *
079: * @param errstr Where to print WARNING and ERROR messages
080: *
081: * @param lw The line width to use in formatting
082: *
083: *
084: * */
085: public StreamMsgLogger(OutputStream outstr, OutputStream errstr,
086: int lw) {
087: out = new PrintWriter(outstr, true);
088: err = new PrintWriter(errstr, true);
089: mp = new MsgPrinter(lw);
090: }
091:
092: /**
093: * Constructs a StreamMsgLogger that uses 'outstr' as the 'out' stream,
094: * and 'errstr' as the 'err' stream. Note that 'outstr' and 'errstr' can
095: * be System.out and System.err.
096: *
097: * @param outstr Where to print simple strings and LOG and INFO messages.
098: *
099: * @param errstr Where to print WARNING and ERROR messages
100: *
101: * @param lw The line width to use in formatting
102: *
103: *
104: * */
105: public StreamMsgLogger(Writer outstr, Writer errstr, int lw) {
106: out = new PrintWriter(outstr, true);
107: err = new PrintWriter(errstr, true);
108: mp = new MsgPrinter(lw);
109: }
110:
111: /**
112: * Constructs a StreamMsgLogger that uses 'outstr' as the 'out' stream,
113: * and 'errstr' as the 'err' stream. Note that 'outstr' and 'errstr' can
114: * be System.out and System.err.
115: *
116: * @param outstr Where to print simple strings and LOG and INFO messages.
117: *
118: * @param errstr Where to print WARNING and ERROR messages
119: *
120: * @param lw The line width to use in formatting
121: *
122: *
123: * */
124: public StreamMsgLogger(PrintWriter outstr, PrintWriter errstr,
125: int lw) {
126: out = outstr;
127: err = errstr;
128: mp = new MsgPrinter(lw);
129: }
130:
131: /**
132: * Prints the message 'msg' to the output device, appending a newline,
133: * with severity 'sev'. The severity of the message is prepended to the
134: * message.
135: *
136: * @param sev The message severity (LOG, INFO, etc.)
137: *
138: * @param msg The message to display
139: *
140: *
141: * */
142: public void printmsg(int sev, String msg) {
143: PrintWriter lout;
144: int ind;
145: String prefix;
146:
147: switch (sev) {
148: case LOG:
149: prefix = "[LOG]: ";
150: lout = out;
151: break;
152: case INFO:
153: prefix = "[INFO]: ";
154: lout = out;
155: break;
156: case WARNING:
157: prefix = "[WARNING]: ";
158: lout = err;
159: break;
160: case ERROR:
161: prefix = "[ERROR]: ";
162: lout = err;
163: break;
164: default:
165: throw new IllegalArgumentException("Severity " + sev
166: + " not valid.");
167: }
168:
169: mp.print(lout, 0, prefix.length(), prefix + msg);
170: lout.flush();
171: }
172:
173: /**
174: * Prints the string 'str' to the 'out' stream, appending a newline. The
175: * message is reformatted to the line width given to the constructors and
176: * using 'flind' characters to indent the first line and 'ind' characters
177: * to indent the second line. However, any newlines appearing in 'str' are
178: * respected. The output device may or may not display the string until
179: * flush() is called, depending on the autoflush state of the PrintWriter,
180: * to be sure flush() should be called to write the string to the
181: * device. This method just prints the string, the string does not make
182: * part of a "message" in the sense that noe severity is associated to it.
183: *
184: * @param str The string to print
185: *
186: * @param flind Indentation of the first line
187: *
188: * @param ind Indentation of any other lines.
189: *
190: *
191: * */
192: public void println(String str, int flind, int ind) {
193: mp.print(out, flind, ind, str);
194: }
195:
196: /**
197: * Writes any buffered data from the print() and println() methods to the
198: * device.
199: *
200: *
201: * */
202: public void flush() {
203: out.flush();
204: }
205:
206: }
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