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org.apache.torque.engine.database.model.JavaNameGenerator |
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1 | package org.apache.torque.engine.database.model; |
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2 | ||
3 | /* |
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4 | * Copyright 2001-2004 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 java.util.List; |
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20 | import java.util.StringTokenizer; |
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21 | ||
22 | import org.apache.commons.lang.StringUtils; |
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23 | ||
24 | /** |
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25 | * A <code>NameGenerator</code> implementation for Java-esque names. |
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26 | * |
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27 | * @author <a href="mailto:dlr@finemaltcoding.com>Daniel Rall</a> |
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28 | * @author <a href="mailto:byron_foster@byron_foster@yahoo.com>Byron Foster</a> |
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29 | * @version $Id: JavaNameGenerator.java,v 1.1.2.2 2004/05/20 04:34:15 seade Exp $ |
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30 | */ |
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31 | 3 | public class JavaNameGenerator implements NameGenerator |
32 | { |
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33 | /** |
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34 | * <code>inputs</code> should consist of two elements, the |
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35 | * original name of the database element and the method for |
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36 | * generating the name. There are currently three methods: |
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37 | * <code>CONV_METHOD_NOCHANGE</code> - xml names are converted |
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38 | * directly to java names without modification. |
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39 | * <code>CONV_METHOD_UNDERSCORE</code> will capitalize the first |
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40 | * letter, remove underscores, and capitalize each letter before |
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41 | * an underscore. All other letters are lowercased. "javaname" |
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42 | * works the same as the <code>CONV_METHOD_JAVANAME</code> method |
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43 | * but will not lowercase any characters. |
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44 | * |
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45 | * @param inputs list expected to contain two parameters, element |
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46 | * 0 contains name to convert, element 1 contains method for conversion. |
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47 | * @return The generated name. |
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48 | * @see org.apache.torque.engine.database.model.NameGenerator |
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49 | */ |
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50 | public String generateName(List inputs) |
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51 | { |
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52 | 15 | String schemaName = (String) inputs.get(0); |
53 | 15 | String method = (String) inputs.get(1); |
54 | 15 | String javaName = null; |
55 | ||
56 | 15 | if (CONV_METHOD_UNDERSCORE.equals(method)) |
57 | { |
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58 | 13 | javaName = underscoreMethod(schemaName); |
59 | } |
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60 | 2 | else if (CONV_METHOD_JAVANAME.equals(method)) |
61 | { |
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62 | 1 | javaName = javanameMethod(schemaName); |
63 | } |
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64 | 1 | else if (CONV_METHOD_NOCHANGE.equals(method)) |
65 | { |
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66 | 1 | javaName = nochangeMethod(schemaName); |
67 | } |
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68 | else |
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69 | { |
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70 | // if for some reason nothing is defined then we default |
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71 | // to the traditional method. |
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72 | 0 | javaName = underscoreMethod(schemaName); |
73 | } |
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74 | ||
75 | 15 | return javaName; |
76 | } |
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77 | ||
78 | /** |
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79 | * Converts a database schema name to java object name. Removes |
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80 | * <code>STD_SEPARATOR_CHAR</code>, capitilizes first letter of |
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81 | * name and each letter after the <code>STD_SEPERATOR</code>, |
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82 | * converts the rest of the letters to lowercase. |
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83 | * |
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84 | * @param schemaName name to be converted. |
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85 | * @return converted name. |
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86 | * @see org.apache.torque.engine.database.model.NameGenerator |
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87 | * @see #underscoreMethod(String) |
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88 | */ |
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89 | protected String underscoreMethod(String schemaName) |
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90 | { |
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91 | 13 | StringBuffer name = new StringBuffer(); |
92 | 13 | StringTokenizer tok = new StringTokenizer |
93 | (schemaName, String.valueOf(STD_SEPARATOR_CHAR)); |
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94 | 43 | while (tok.hasMoreTokens()) |
95 | { |
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96 | 30 | String namePart = ((String) tok.nextElement()).toLowerCase(); |
97 | 30 | name.append(StringUtils.capitalise(namePart)); |
98 | } |
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99 | 13 | return name.toString(); |
100 | } |
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101 | ||
102 | /** |
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103 | * Converts a database schema name to java object name. Operates |
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104 | * same as underscoreMethod but does not convert anything to |
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105 | * lowercase. |
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106 | * |
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107 | * @param schemaName name to be converted. |
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108 | * @return converted name. |
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109 | * @see org.apache.torque.engine.database.model.NameGenerator |
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110 | * @see #underscoreMethod(String) |
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111 | */ |
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112 | protected String javanameMethod(String schemaName) |
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113 | { |
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114 | 1 | StringBuffer name = new StringBuffer(); |
115 | 1 | StringTokenizer tok = new StringTokenizer |
116 | (schemaName, String.valueOf(STD_SEPARATOR_CHAR)); |
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117 | 3 | while (tok.hasMoreTokens()) |
118 | { |
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119 | 2 | String namePart = (String) tok.nextElement(); |
120 | 2 | name.append(StringUtils.capitalise(namePart)); |
121 | } |
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122 | 1 | return name.toString(); |
123 | } |
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124 | ||
125 | /** |
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126 | * Converts a database schema name to java object name. In this |
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127 | * case no conversion is made. |
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128 | * |
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129 | * @param name name to be converted. |
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130 | * @return The <code>name</code> parameter, unchanged. |
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131 | */ |
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132 | protected final String nochangeMethod(String name) |
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133 | { |
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134 | 1 | return name; |
135 | } |
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136 | } |
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