Classes in this File | Line Coverage | Branch Coverage | Complexity | |||||||
BeanPropertySelectionModel |
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1 | // Copyright 2004, 2005 The Apache Software Foundation |
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2 | // |
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3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
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4 | // you may not use this file except in compliance with the License. |
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5 | // You may obtain a copy of the License at |
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6 | // |
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7 | // http://www.apache.org/licenses/LICENSE-2.0 |
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8 | // |
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9 | // Unless required by applicable law or agreed to in writing, software |
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10 | // distributed under the License is distributed on an "AS IS" BASIS, |
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11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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12 | // See the License for the specific language governing permissions and |
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13 | // limitations under the License. |
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14 | package org.apache.tapestry.form; |
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15 | ||
16 | import java.io.Serializable; |
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17 | import java.util.ArrayList; |
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18 | import java.util.Arrays; |
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19 | import java.util.Collection; |
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20 | import java.util.List; |
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21 | ||
22 | import org.apache.commons.beanutils.BeanUtils; |
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23 | ||
24 | /** |
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25 | * This class is a property selection model for an object list. This is used in PropertySelection, |
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26 | * MultiplePropertySelection or Palette tapestry components. For example, to use for a Hospital |
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27 | * class, and have the labels be the hospital names. <code> |
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28 | * List<Hospital> list = ...; |
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29 | * return new BeanPropertySelectionModel(hospitals, "name"); |
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30 | * </code> |
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31 | * This will use getName() on the Hospital object, as its display. |
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32 | * |
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33 | * @author Gabriel Handford |
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34 | */ |
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35 | public class BeanPropertySelectionModel implements IPropertySelectionModel, Serializable |
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36 | { |
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37 | ||
38 | /** Comment for <code>serialVersionUID</code>. */ |
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39 | private static final long serialVersionUID = 3763091973006766644L; |
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40 | private List _list; |
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41 | private String _labelField; |
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42 | ||
43 | /** |
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44 | * Build an empty property selection model. |
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45 | */ |
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46 | public BeanPropertySelectionModel() |
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47 | { |
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48 | 1 | this(Arrays.asList(new Object[0]), null); |
49 | 1 | } |
50 | ||
51 | /** |
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52 | * Build a bean property selection model. |
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53 | * |
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54 | * @param list |
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55 | * The list |
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56 | * @param labelField |
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57 | * The label field |
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58 | */ |
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59 | public BeanPropertySelectionModel(List list, String labelField) |
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60 | 2 | { |
61 | 2 | _list = list; |
62 | 2 | _labelField = labelField; |
63 | 2 | } |
64 | ||
65 | /** |
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66 | * Build a bean property selection model. |
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67 | * |
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68 | * @param c |
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69 | * Collection |
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70 | * @param labelField |
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71 | * The label field |
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72 | */ |
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73 | public BeanPropertySelectionModel(Collection c, String labelField) |
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74 | 0 | { |
75 | 0 | _list = new ArrayList(c); |
76 | 0 | _labelField = labelField; |
77 | 0 | } |
78 | ||
79 | /** |
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80 | * Get the number of options. |
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81 | * |
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82 | * @return option count |
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83 | */ |
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84 | public int getOptionCount() |
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85 | { |
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86 | 2 | return _list.size(); |
87 | } |
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88 | ||
89 | /** |
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90 | * Get the option at index. |
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91 | * |
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92 | * @param index |
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93 | * Index |
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94 | * @return object Object at index |
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95 | */ |
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96 | public Object getOption(int index) |
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97 | { |
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98 | 2 | return _list.get(index); |
99 | } |
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100 | ||
101 | /** |
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102 | * Get the label at index. |
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103 | * |
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104 | * @param index |
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105 | * Index |
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106 | * @return label Label at index |
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107 | */ |
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108 | public String getLabel(int index) |
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109 | { |
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110 | 1 | Object obj = _list.get(index); |
111 | try { |
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112 | ||
113 | 1 | return BeanUtils.getProperty(obj, _labelField); |
114 | 0 | } catch (Exception e) { |
115 | 0 | throw new RuntimeException("Error getting property", e); |
116 | } |
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117 | } |
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118 | ||
119 | /** |
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120 | * Get the value at index. |
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121 | * |
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122 | * @param index |
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123 | * Index |
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124 | * @return value Value at index |
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125 | */ |
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126 | public String getValue(int index) |
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127 | { |
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128 | 0 | return String.valueOf(index); |
129 | } |
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130 | ||
131 | public boolean isDisabled(int index) |
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132 | { |
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133 | 0 | return false; |
134 | } |
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135 | ||
136 | /** |
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137 | * Translate value to object. |
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138 | * |
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139 | * @param value |
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140 | * Value |
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141 | * @return object Object from value |
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142 | */ |
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143 | public Object translateValue(String value) |
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144 | { |
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145 | 1 | return getOption(Integer.parseInt(value)); |
146 | } |
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147 | } |