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org.apache.turbine.util.parser.ParserUtils |
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1 | package org.apache.turbine.util.parser; |
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2 | ||
3 | /* |
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4 | * Copyright 2001-2005 The Apache Software Foundation. |
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5 | * |
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6 | * Licensed under the Apache License, Version 2.0 (the "License") |
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7 | * you may not use this file except in compliance with the License. |
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8 | * You may obtain a copy of the License at |
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9 | * |
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10 | * http://www.apache.org/licenses/LICENSE-2.0 |
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11 | * |
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12 | * Unless required by applicable law or agreed to in writing, software |
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13 | * distributed under the License is distributed on an "AS IS" BASIS, |
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14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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15 | * See the License for the specific language governing permissions and |
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16 | * limitations under the License. |
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17 | */ |
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18 | ||
19 | import org.apache.commons.configuration.Configuration; |
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20 | ||
21 | import org.apache.commons.logging.Log; |
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22 | import org.apache.commons.logging.LogFactory; |
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23 | ||
24 | import org.apache.commons.lang.StringUtils; |
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25 | ||
26 | import org.apache.turbine.services.TurbineServices; |
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27 | ||
28 | /** |
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29 | * Static helpers for folding fields to upper or lower case |
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30 | * |
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31 | * @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a> |
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32 | * @version $Id: ParserUtils.java 279778 2005-09-09 14:04:11Z henning $ |
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33 | */ |
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34 | ||
35 | 6 | public abstract class ParserUtils |
36 | { |
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37 | /** Property for setting the URL folding value */ |
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38 | public static final String URL_CASE_FOLDING_KEY = "url.case.folding"; |
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39 | ||
40 | /** No folding */ |
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41 | public static final String URL_CASE_FOLDING_NONE_VALUE = "none"; |
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42 | ||
43 | /** Fold to lower case */ |
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44 | public static final String URL_CASE_FOLDING_LOWER_VALUE = "lower"; |
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45 | ||
46 | /** Fold to upper case */ |
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47 | public static final String URL_CASE_FOLDING_UPPER_VALUE = "upper"; |
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48 | ||
49 | /** No folding set */ |
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50 | private static final int URL_CASE_FOLDING_UNSET = 0; |
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51 | ||
52 | /** Folding set to "no folding" */ |
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53 | public static final int URL_CASE_FOLDING_NONE = 1; |
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54 | ||
55 | /** Folding set to "lowercase" */ |
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56 | public static final int URL_CASE_FOLDING_LOWER = 2; |
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57 | ||
58 | /** Folding set to "uppercase" */ |
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59 | public static final int URL_CASE_FOLDING_UPPER = 3; |
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60 | ||
61 | /** Logging */ |
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62 | 24 | private static Log log = LogFactory.getLog(ParserUtils.class); |
63 | ||
64 | /** The folding from the properties */ |
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65 | 12 | private static int folding = URL_CASE_FOLDING_UNSET; |
66 | ||
67 | /** |
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68 | * Convert a String value according to the url.case.folding property. |
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69 | * |
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70 | * @param value the String to convert |
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71 | * |
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72 | * @return a new String. |
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73 | * |
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74 | */ |
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75 | public static String convertAndTrim(String value) |
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76 | { |
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77 | 3794 | return convertAndTrim(value, getUrlFolding()); |
78 | } |
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79 | ||
80 | /** |
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81 | * A static version of the convert method, which |
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82 | * trims the string data and applies the conversion specified in |
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83 | * the property given by URL_CASE_FOLDING. It returns a new |
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84 | * string so that it does not destroy the value data. |
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85 | * |
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86 | * @param value A String to be processed. |
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87 | * @return A new String converted to lowercase and trimmed. |
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88 | */ |
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89 | public static String convertAndTrim(String value, int fold) |
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90 | { |
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91 | 3794 | String tmp = null; |
92 | ||
93 | 3794 | if (value != null) |
94 | { |
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95 | 3572 | tmp = value.trim(); |
96 | ||
97 | 3572 | switch (fold) |
98 | { |
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99 | case URL_CASE_FOLDING_NONE: |
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100 | { |
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101 | 0 | break; |
102 | } |
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103 | case URL_CASE_FOLDING_LOWER: |
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104 | { |
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105 | 3572 | tmp = tmp.toLowerCase(); |
106 | 3572 | break; |
107 | } |
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108 | case URL_CASE_FOLDING_UPPER: |
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109 | { |
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110 | 0 | tmp = tmp.toUpperCase(); |
111 | 0 | break; |
112 | } |
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113 | default: |
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114 | { |
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115 | 0 | log.error("Passed " + fold + " as fold rule, which is illegal!"); |
116 | break; |
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117 | } |
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118 | } |
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119 | } |
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120 | 3794 | return tmp; |
121 | } |
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122 | ||
123 | /** |
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124 | * Gets the folding value from the properties |
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125 | * |
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126 | * @return The current Folding Value |
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127 | */ |
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128 | public static int getUrlFolding() |
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129 | { |
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130 | 3794 | if (folding == URL_CASE_FOLDING_UNSET) |
131 | { |
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132 | 12 | Configuration conf = TurbineServices.getInstance().getConfiguration(); |
133 | 12 | String foldString = conf.getString(URL_CASE_FOLDING_KEY, |
134 | URL_CASE_FOLDING_NONE_VALUE).toLowerCase(); |
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135 | ||
136 | 12 | folding = URL_CASE_FOLDING_NONE; |
137 | ||
138 | 12 | log.debug("Setting folding from " + foldString); |
139 | 12 | if (StringUtils.isNotEmpty(foldString)) |
140 | { |
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141 | 12 | if (foldString.equals(URL_CASE_FOLDING_NONE_VALUE)) |
142 | { |
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143 | 0 | folding = URL_CASE_FOLDING_NONE; |
144 | } |
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145 | 12 | else if (foldString.equals(URL_CASE_FOLDING_LOWER_VALUE)) |
146 | { |
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147 | 12 | folding = URL_CASE_FOLDING_LOWER; |
148 | } |
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149 | 0 | else if (foldString.equals(URL_CASE_FOLDING_UPPER_VALUE)) |
150 | { |
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151 | 0 | folding = URL_CASE_FOLDING_UPPER; |
152 | } |
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153 | else |
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154 | { |
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155 | 0 | log.error("Got " + foldString + " from " + URL_CASE_FOLDING_KEY + " property, which is illegal!"); |
156 | } |
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157 | } |
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158 | } |
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159 | 3794 | return folding; |
160 | } |
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161 | } |
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