Mercurial > hg > blitz_condensed
comparison src/com/go/trove/io/LinePositionReader.java @ 0:3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
author | Dan Creswell <dan.creswell@gmail.com> |
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date | Sat, 21 Mar 2009 11:00:06 +0000 |
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-1:000000000000 | 0:3dc0c5604566 |
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1 /* ==================================================================== | |
2 * Trove - Copyright (c) 1997-2000 Walt Disney Internet Group | |
3 * ==================================================================== | |
4 * The Tea Software License, Version 1.1 | |
5 * | |
6 * Copyright (c) 2000 Walt Disney Internet Group. All rights reserved. | |
7 * | |
8 * Redistribution and use in source and binary forms, with or without | |
9 * modification, are permitted provided that the following conditions | |
10 * are met: | |
11 * | |
12 * 1. Redistributions of source code must retain the above copyright | |
13 * notice, this list of conditions and the following disclaimer. | |
14 * | |
15 * 2. Redistributions in binary form must reproduce the above copyright | |
16 * notice, this list of conditions and the following disclaimer in | |
17 * the documentation and/or other materials provided with the | |
18 * distribution. | |
19 * | |
20 * 3. The end-user documentation included with the redistribution, | |
21 * if any, must include the following acknowledgment: | |
22 * "This product includes software developed by the | |
23 * Walt Disney Internet Group (http://opensource.go.com/)." | |
24 * Alternately, this acknowledgment may appear in the software itself, | |
25 * if and wherever such third-party acknowledgments normally appear. | |
26 * | |
27 * 4. The names "Tea", "TeaServlet", "Kettle", "Trove" and "BeanDoc" must | |
28 * not be used to endorse or promote products derived from this | |
29 * software without prior written permission. For written | |
30 * permission, please contact opensource@dig.com. | |
31 * | |
32 * 5. Products derived from this software may not be called "Tea", | |
33 * "TeaServlet", "Kettle" or "Trove", nor may "Tea", "TeaServlet", | |
34 * "Kettle", "Trove" or "BeanDoc" appear in their name, without prior | |
35 * written permission of the Walt Disney Internet Group. | |
36 * | |
37 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED | |
38 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
40 * DISCLAIMED. IN NO EVENT SHALL THE WALT DISNEY INTERNET GROUP OR ITS | |
41 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
42 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
43 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
44 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | |
45 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
46 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
47 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
48 * ==================================================================== | |
49 * | |
50 * For more information about Tea, please see http://opensource.go.com/. | |
51 */ | |
52 | |
53 package com.go.trove.io; | |
54 | |
55 import java.io.*; | |
56 | |
57 /****************************************************************************** | |
58 * LinePositionReader aids in printing line numbers for error reporting. | |
59 * | |
60 * @author Brian S O'Neill | |
61 * @version | |
62 * <!--$$Revision: 1.1 $-->, <!--$$JustDate:--> 12/11/00 <!-- $--> | |
63 */ | |
64 public class LinePositionReader extends PositionReader { | |
65 private int mLineNumber = 1; | |
66 private int mPushback = -1; | |
67 | |
68 public LinePositionReader(Reader reader) { | |
69 super(reader); | |
70 } | |
71 | |
72 public int read() throws IOException { | |
73 int c; | |
74 | |
75 if (mPushback >= 0) { | |
76 c = mPushback; | |
77 mPushback = -1; | |
78 } | |
79 else { | |
80 c = super.read(); | |
81 } | |
82 | |
83 if (c == '\n') { | |
84 mLineNumber++; | |
85 } | |
86 else if (c == '\r') { | |
87 int peek = super.read(); | |
88 if (peek != '\n') { | |
89 mLineNumber++; | |
90 } | |
91 mPushback = peek; | |
92 } | |
93 | |
94 return c; | |
95 } | |
96 | |
97 /** | |
98 * After calling readLine, calling getLineNumber returns the next line | |
99 * number. | |
100 */ | |
101 public String readLine() throws IOException { | |
102 StringBuffer buf = new StringBuffer(80); | |
103 int line = mLineNumber; | |
104 int c; | |
105 while (line == mLineNumber && (c = read()) >= 0) { | |
106 buf.append((char)c); | |
107 } | |
108 return buf.toString(); | |
109 } | |
110 | |
111 /** | |
112 * Skips forward into the stream to the line number specified. The line | |
113 * can then be read by calling readLine. Calling getPosition | |
114 * returns the position that the line begins. | |
115 * | |
116 * @return the line number reached | |
117 */ | |
118 public int skipForwardToLine(int line) throws IOException { | |
119 while (mLineNumber < line && read() >= 0) {} | |
120 return mLineNumber; | |
121 } | |
122 | |
123 /** | |
124 * @return the number of the line currently being read or the next one | |
125 * available. | |
126 */ | |
127 public int getLineNumber() { | |
128 return mLineNumber; | |
129 } | |
130 | |
131 /** | |
132 * Converts all whitespace characters in a String to space characters | |
133 * (\u0020). | |
134 */ | |
135 public static String cleanWhitespace(String str) { | |
136 int length = str.length(); | |
137 | |
138 StringBuffer buf = new StringBuffer(length); | |
139 for (int i=0; i<length; i++) { | |
140 char c = str.charAt(i); | |
141 if (Character.isWhitespace(c)) { | |
142 buf.append(' '); | |
143 } | |
144 else { | |
145 buf.append(c); | |
146 } | |
147 } | |
148 | |
149 return buf.toString(); | |
150 } | |
151 | |
152 /** | |
153 * Creates and returns a String containing a sequence of the specified | |
154 * length, repeating the given character. | |
155 */ | |
156 public static String createSequence(char c, int length) { | |
157 if (length < 0) length = 1; | |
158 | |
159 StringBuffer buf = new StringBuffer(length); | |
160 for (; length > 0; length--) { | |
161 buf.append(c); | |
162 } | |
163 return buf.toString(); | |
164 } | |
165 } |