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1
16
17 package org.springframework.web.servlet.tags.form;
18
19 import org.springframework.core.enums.LabeledEnum;
20 import org.springframework.util.CollectionUtils;
21 import org.springframework.util.ObjectUtils;
22 import org.springframework.web.servlet.support.BindStatus;
23
24 import java.beans.PropertyEditor  ;
25 import java.util.Collection ;
26 import java.util.Iterator ;
27 import java.util.Map ;
28
29
59 abstract class SelectedValueComparator {
60
61
66 public static boolean isSelected(BindStatus bindStatus, Object candidateValue) {
67 Object boundValue = getBoundValue(bindStatus);
68
69 if (boundValue == null) {
70 return (candidateValue == null);
71 }
72
73 boolean selected = false;
74
75 if (boundValue.getClass().isArray()) {
76 selected = collectionCompare(CollectionUtils.arrayToList(boundValue), candidateValue, bindStatus);
77 }
78 else if (boundValue instanceof Collection ) {
79 selected = collectionCompare((Collection ) boundValue, candidateValue, bindStatus);
80 }
81 else if (boundValue instanceof Map ) {
82 selected = mapCompare((Map ) boundValue, candidateValue, bindStatus);
83 }
84
85 if (!selected) {
86 if (ObjectUtils.nullSafeEquals(boundValue, candidateValue)) {
87 selected = true;
88 }
89 else {
90 selected = exhaustiveCompare(boundValue, candidateValue, bindStatus.getEditor());
91 }
92 }
93
94 return selected;
95 }
96
97
98 private static boolean mapCompare(Map boundMap, Object candidateValue, BindStatus bindStatus) {
99 if (boundMap.containsKey(candidateValue)) {
100 return true;
101 }
102 else {
103 return exhaustiveCollectionCompare(boundMap.keySet(), candidateValue, bindStatus.getEditor());
104 }
105 }
106
107 private static boolean collectionCompare(Collection boundCollection, Object candidateValue, BindStatus bindStatus) {
108 if (boundCollection.contains(candidateValue)) {
109 return true;
110 }
111 else {
112 return exhaustiveCollectionCompare(boundCollection, candidateValue, bindStatus.getEditor());
113 }
114 }
115
116 private static Object getBoundValue(BindStatus bindStatus) {
117 if (bindStatus == null) {
118 return null;
119 }
120 if (bindStatus.getEditor() != null) {
121 Object editorValue = bindStatus.getEditor().getValue();
122 if (editorValue != null) {
123 return editorValue;
124 }
125 }
126 return bindStatus.getValue();
127 }
128
129 private static boolean exhaustiveCollectionCompare(
130 Collection collection, Object candidateValue, PropertyEditor propertyEditor) {
131
132 for (Iterator iterator = collection.iterator(); iterator.hasNext();) {
133 Object o = iterator.next();
134 if (exhaustiveCompare(o, candidateValue, propertyEditor)) {
135 return true;
136 }
137 }
138 return false;
139 }
140
141 private static boolean exhaustiveCompare(Object boundValue, Object candidate, PropertyEditor propertyEditor) {
142 String candidateDisplayString = ObjectUtils.getDisplayString(candidate);
143 if (boundValue instanceof LabeledEnum) {
144 LabeledEnum labeledEnum = (LabeledEnum) boundValue;
145 String enumCodeAsString = ObjectUtils.getDisplayString(labeledEnum.getCode());
146 if (enumCodeAsString.equals(candidateDisplayString)) {
147 return true;
148 }
149 String enumLabelAsString = ObjectUtils.getDisplayString(labeledEnum.getLabel());
150 if (enumLabelAsString.equals(candidateDisplayString)) {
151 return true;
152 }
153 }
154 else if (ObjectUtils.getDisplayString(boundValue).equals(candidateDisplayString)) {
155 return true;
156 }
157 else if (propertyEditor != null && candidate instanceof String ) {
158
159 Object originalValue = propertyEditor.getValue();
161 String candidateAsString = (String ) candidate;
162 try {
163 propertyEditor.setAsText(candidateAsString);
164 if (ObjectUtils.nullSafeEquals(boundValue, propertyEditor.getValue())) {
165 return true;
166 }
167 }
168 finally {
169 propertyEditor.setValue(originalValue);
170 }
171
172 if (propertyEditor.getValue() != null) {
173 return ObjectUtils.nullSafeEquals(candidateAsString, propertyEditor.getAsText());
174 }
175 }
176 return false;
177 }
178
179 }
180 |
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