1 | /*
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2 | * Copyright 2001-2004 The Apache Software Foundation
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3 | *
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4 | * Licensed under the Apache License, Version 2.0 (the "License");
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5 | * you may not use this file except in compliance with the License.
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6 | * You may obtain a copy of the License at
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7 | *
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8 | * http://www.apache.org/licenses/LICENSE-2.0
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9 | *
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10 | * Unless required by applicable law or agreed to in writing, software
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11 | * distributed under the License is distributed on an "AS IS" BASIS,
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12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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13 | * See the License for the specific language governing permissions and
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14 | * limitations under the License.
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15 | *
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16 | */
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17 | package org.apache.tools.ant.taskdefs.optional.jsp;
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18 | import java.io.File;
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19 |
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20 | /**
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21 | * This is a class derived from the Jasper code
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22 | * (org.apache.jasper.compiler.CommandLineCompiler) to map from a JSP filename
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23 | * to a valid Java classname.
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24 | *
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25 | */
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26 | public class JspNameMangler implements JspMangler {
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27 |
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28 | /**
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29 | * this is the list of keywords which can not be used as classnames
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30 | */
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31 | public static final String[] keywords = {
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32 | "assert",
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33 | "abstract", "boolean", "break", "byte",
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34 | "case", "catch", "char", "class",
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35 | "const", "continue", "default", "do",
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36 | "double", "else", "extends", "final",
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37 | "finally", "float", "for", "goto",
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38 | "if", "implements", "import",
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39 | "instanceof", "int", "interface",
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40 | "long", "native", "new", "package",
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41 | "private", "protected", "public",
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42 | "return", "short", "static", "super",
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43 | "switch", "synchronized", "this",
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44 | "throw", "throws", "transient",
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45 | "try", "void", "volatile", "while"
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46 | };
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47 |
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48 |
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49 | /**
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50 | * map from a jsp file to a java filename; does not do packages
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51 | *
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52 | * @param jspFile file
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53 | * @return java filename
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54 | */
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55 | public String mapJspToJavaName(File jspFile) {
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56 | return mapJspToBaseName(jspFile) + ".java";
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57 | }
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58 |
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59 |
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60 | /**
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61 | * map from a jsp file to a base name; does not deal with extensions
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62 | *
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63 | * @param jspFile jspFile file
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64 | * @return exensionless potentially remapped name
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65 | */
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66 | private String mapJspToBaseName(File jspFile) {
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67 | String className;
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68 | className = stripExtension(jspFile);
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69 |
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70 | // since we don't mangle extensions like the servlet does,
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71 | // we need to check for keywords as class names
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72 | for (int i = 0; i < keywords.length; ++i) {
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73 | if (className.equals(keywords[i])) {
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74 | className += "%";
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75 | break;
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76 | }
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77 | }
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78 |
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79 | // Fix for invalid characters. If you think of more add to the list.
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80 | StringBuffer modifiedClassName = new StringBuffer(className.length());
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81 | // first char is more restrictive than the rest
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82 | char firstChar = className.charAt(0);
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83 | if (Character.isJavaIdentifierStart(firstChar)) {
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84 | modifiedClassName.append(firstChar);
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85 | } else {
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86 | modifiedClassName.append(mangleChar(firstChar));
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87 | }
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88 | // this is the rest
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89 | for (int i = 1; i < className.length(); i++) {
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90 | char subChar = className.charAt(i);
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91 | if (Character.isJavaIdentifierPart(subChar)) {
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92 | modifiedClassName.append(subChar);
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93 | } else {
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94 | modifiedClassName.append(mangleChar(subChar));
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95 | }
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96 | }
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97 | return modifiedClassName.toString();
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98 | }
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99 |
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100 |
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101 | /**
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102 | * get short filename from file
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103 | *
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104 | * @param jspFile file in
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105 | * @return file without any jsp extension
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106 | */
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107 | private String stripExtension(File jspFile) {
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108 | String className;
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109 | String filename = jspFile.getName();
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110 | if (filename.endsWith(".jsp")) {
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111 | className = filename.substring(0, filename.length() - 4);
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112 | } else {
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113 | className = filename;
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114 | }
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115 | return className;
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116 | }
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117 |
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118 |
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119 | /**
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120 | * definition of the char escaping algorithm
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121 | *
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122 | * @param ch char to mangle
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123 | * @return mangled string; 5 digit hex value
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124 | */
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125 | private static final String mangleChar(char ch) {
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126 |
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127 | if (ch == File.separatorChar) {
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128 | ch = '/';
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129 | }
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130 | String s = Integer.toHexString(ch);
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131 | int nzeros = 5 - s.length();
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132 | char[] result = new char[6];
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133 | result[0] = '_';
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134 | for (int i = 1; i <= nzeros; ++i) {
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135 | result[i] = '0';
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136 | }
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137 | int resultIndex = 0;
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138 | for (int i = nzeros + 1; i < 6; ++i) {
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139 | result[i] = s.charAt(resultIndex++);
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140 | }
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141 | return new String(result);
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142 | }
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143 |
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144 | /**
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145 | * taking in the substring representing the path relative to the source dir
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146 | * return a new string representing the destination path
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147 | * not supported, as jasper in tomcat4.0 doesnt either
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148 | */
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149 | public String mapPath(String path) {
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150 | return null;
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151 | }
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152 | }
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153 |
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