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1
11 package org.eclipse.ui.internal.preferences;
12
13 import java.util.Iterator  ;
14 import java.util.Map ;
15 import java.util.Set ;
16
17 import org.eclipse.ui.internal.util.Util;
18
19
22 public class PropertyMapUnion implements IPropertyMap {
23
24 private Map values;
25
26 private final static class PropertyInfo {
27 Object value;
28 boolean commonAttribute;
29
30 PropertyInfo(Object value, boolean commonAttribute) {
31 this.value = value;
32 this.commonAttribute = commonAttribute;
33 }
34 }
35
36
39 public Set keySet() {
40 return values.keySet();
41 }
42
43
46 public Object getValue(String propertyId, Class propertyType) {
47 PropertyInfo info = (PropertyInfo)values.get(propertyId);
48
49 if (info == null) {
50 return null;
51 }
52
53 Object value = info.value;
54
55 if (propertyType.isInstance(value)) {
56 return value;
57 }
58
59 return null;
60 }
61
62
65 public boolean isCommonProperty(String propertyId) {
66 PropertyInfo info = (PropertyInfo)values.get(propertyId);
67
68 if (info == null) {
69 return false;
70 }
71
72 return info.commonAttribute;
73 }
74
75
78 public boolean propertyExists(String propertyId) {
79 return values.get(propertyId) != null;
80 }
81
82
85 public void setValue(String propertyId, Object newValue) {
86 PropertyInfo info = new PropertyInfo(newValue, true);
87
88 values.put(propertyId, info);
89 }
90
91 public void addMap(IPropertyMap toAdd) {
92 Set keySet = toAdd.keySet();
93
94 for (Iterator iter = keySet().iterator(); iter.hasNext();) {
96 String key = (String ) iter.next();
97
98 PropertyInfo localInfo = (PropertyInfo)values.get(key);
99 if (localInfo != null) {
101 if (toAdd.propertyExists(key)) {
103 Object value = toAdd.getValue(key, Object .class);
105
106 if (!Util.equals(value, toAdd.getValue(key, Object .class))) {
107 localInfo.value = null;
109 }
110
111 localInfo.commonAttribute = localInfo.commonAttribute && toAdd.isCommonProperty(key);
114 } else {
115 localInfo.commonAttribute = false;
117 }
118 }
119 }
120
121 for (Iterator iter = keySet.iterator(); iter.hasNext();) {
123 String element = (String ) iter.next();
124
125 PropertyInfo localInfo = (PropertyInfo)values.get(element);
126 if (localInfo == null) {
127 Object value = toAdd.getValue(element, Object .class);
128
129 boolean isCommon = toAdd.isCommonProperty(element);
130
131 localInfo = new PropertyInfo(value, isCommon);
132 values.put(element, localInfo);
133 }
134 }
135 }
136
137 public void removeValue(String propertyId) {
138 values.remove(propertyId);
139 }
140 }
141 |
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