Mercurial > hg > blitz_stable

annotate src/com/go/trove/io/TagReader.java @ 27:511648fa4d64 Version 2.1

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Version to 2.1
author Dan Creswell <dan.creswell@gmail.com>
date Mon, 04 Jan 2010 13:00:40 +0000
parents 3dc0c5604566
children
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1 /* ====================================================================
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2 * Trove - Copyright (c) 1997-2000 Walt Disney Internet Group
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3 * ====================================================================
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4 * The Tea Software License, Version 1.1
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5 *
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6 * Copyright (c) 2000 Walt Disney Internet Group. All rights reserved.
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7 *
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8 * Redistribution and use in source and binary forms, with or without
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9 * modification, are permitted provided that the following conditions
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10 * are met:
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11 *
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12 * 1. Redistributions of source code must retain the above copyright
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13 * notice, this list of conditions and the following disclaimer.
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14 *
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15 * 2. Redistributions in binary form must reproduce the above copyright
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16 * notice, this list of conditions and the following disclaimer in
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17 * the documentation and/or other materials provided with the
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18 * distribution.
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19 *
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20 * 3. The end-user documentation included with the redistribution,
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21 * if any, must include the following acknowledgment:
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22 * "This product includes software developed by the
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23 * Walt Disney Internet Group (http://opensource.go.com/)."
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24 * Alternately, this acknowledgment may appear in the software itself,
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25 * if and wherever such third-party acknowledgments normally appear.
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26 *
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27 * 4. The names "Tea", "TeaServlet", "Kettle", "Trove" and "BeanDoc" must
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28 * not be used to endorse or promote products derived from this
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29 * software without prior written permission. For written
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30 * permission, please contact opensource@dig.com.
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31 *
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32 * 5. Products derived from this software may not be called "Tea",
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33 * "TeaServlet", "Kettle" or "Trove", nor may "Tea", "TeaServlet",
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34 * "Kettle", "Trove" or "BeanDoc" appear in their name, without prior
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35 * written permission of the Walt Disney Internet Group.
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36 *
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37 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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38 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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40 * DISCLAIMED. IN NO EVENT SHALL THE WALT DISNEY INTERNET GROUP OR ITS
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41 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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42 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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43 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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44 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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45 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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46 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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47 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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48 * ====================================================================
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49 *
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50 * For more information about Tea, please see http://opensource.go.com/.
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51 */
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52
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53 package com.go.trove.io;
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54
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55 import java.io.*;
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56
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57 /******************************************************************************
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58 *
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59 * @author Brian S O'Neill
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60 * @version
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61 * <!--$$Revision: 1.1 $-->, <!--$$JustDate:--> 12/11/00 <!-- $-->
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62 */
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63 public class TagReader extends EscapeReader {
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64 private int mTagCount;
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65 private int[] mTagStarts;
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66 private String[] mTagEnds;
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67 private int[] mCodes;
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68
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69 private char[] mMinibuf;
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70
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71 private static int maxLength(String[] tags) {
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72 int max = 0;
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73
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74 for (int i=0; i<tags.length; i++) {
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75 if (tags[i].length() > max) {
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76 max = tags[i].length();
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77 }
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78 }
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79
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80 return max;
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81 }
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82
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83 public TagReader(Reader source, String[] tags, int[] codes) {
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84 super(source, maxLength(tags));
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85
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86 mTagCount = tags.length;
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87 mTagStarts = new int[mTagCount];
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88 mTagEnds = new String[mTagCount];
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89 mCodes = new int[mTagCount];
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90
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91 for (int i=0; i<mTagCount; i++) {
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92 mTagStarts[i] = tags[i].charAt(0);
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93 mTagEnds[i] = tags[i].substring(1);
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94 mCodes[i] = codes[i];
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95 }
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96
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97 mMinibuf = new char[maxLength(tags)];
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98 }
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99
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100 public int read() throws IOException {
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101 int c = mSource.read();
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102
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103 if (c == -1 || !mEscapesEnabled) {
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104 return c;
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105 }
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106
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107 for (int i=0; i<mTagCount; i++) {
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108 if (mTagStarts[i] == c) {
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109 int length = mTagEnds[i].length();
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110
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111 mMinibuf[0] = (char)c;
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112 int len = mSource.read(mMinibuf, 0, length);
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113
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114 if (len == length) {
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115 if (new String(mMinibuf, 0, length).equals(mTagEnds[i])) {
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116 return mCodes[i];
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117 }
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118 }
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119
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120 if (len > 0) {
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121 mSource.unread(len);
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122 }
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123 }
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124 }
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125
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126 return c;
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127 }
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128
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129 public static void main(String[] arg) throws Exception {
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130 Tester.test(arg);
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131 }
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132
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133 private static class Tester {
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134 public static void test(String[] arg) throws Exception {
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135 String str = "This <%is a %> % > > % %% >> < % test.\n";
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136
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137 System.out.println("\nOriginal: " + str);
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138
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139 System.out.println("\nConverted:\n");
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140
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141 Reader reader = new StringReader(str);
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142
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143 TagReader tr = new TagReader
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144 (reader, new String[] {"<%", "%>"}, new int[] {-2, -3});
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145
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146 PositionReader pr = new PositionReader(tr);
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147
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148 int c;
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149 System.out.print(pr.getNextPosition() + "\t");
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150 while ( (c = pr.read()) != -1 ) {
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151 System.out.println((char)c + "\t" + c);
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152 System.out.print(pr.getNextPosition() + "\t");
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153 }
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154 }
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155 }
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156 }