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1
15 package org.apache.tapestry.services.impl;
16
17 import java.util.ArrayList  ;
18 import java.util.HashMap ;
19 import java.util.List ;
20 import java.util.Locale ;
21 import java.util.Map ;
22
23 import org.apache.hivemind.Resource;
24 import org.apache.hivemind.lib.chain.ChainBuilder;
25 import org.apache.tapestry.IComponent;
26 import org.apache.tapestry.INamespace;
27 import org.apache.tapestry.engine.IPropertySource;
28 import org.apache.tapestry.event.ResetEventListener;
29 import org.apache.tapestry.services.ComponentPropertySource;
30 import org.apache.tapestry.spec.IComponentSpecification;
31 import org.apache.tapestry.util.PropertyHolderPropertySource;
32
33
39 public class ComponentPropertySourceImpl implements ComponentPropertySource, ResetEventListener
40 {
41 private IPropertySource _globalProperties;
42
43 private ChainBuilder _chainBuilder;
44
45 private Map _componentSources = new HashMap ();
46
47 private Map _localizedComponentSources = new HashMap ();
48
49 private Map _namespaceSources = new HashMap ();
50
51 private Map _localizedNamespaceSources = new HashMap ();
52
53 public synchronized void resetEventDidOccur()
54 {
55 _componentSources.clear();
56 _localizedComponentSources.clear();
57 _namespaceSources.clear();
58 _localizedNamespaceSources.clear();
59 }
60
61 private synchronized IPropertySource getSourceForNamespace(INamespace namespace)
62 {
63 Resource key = namespace.getSpecificationLocation();
64
65 IPropertySource result = (IPropertySource) _namespaceSources.get(key);
66
67 if (result == null)
68 {
69 result = createSourceForNamespace(namespace);
70 _namespaceSources.put(key, result);
71 }
72
73 return result;
74 }
75
76 private synchronized IPropertySource getSourceForComponent(IComponent component)
77 {
78 Resource key = component.getSpecification().getSpecificationLocation();
79
80 IPropertySource result = (IPropertySource) _componentSources.get(key);
81
82 if (result == null)
83 {
84 result = createSourceForComponent(component);
85 _componentSources.put(key, result);
86 }
87
88 return result;
89 }
90
91 private synchronized LocalizedPropertySource getLocalizedSourceForComponent(IComponent component)
92 {
93 Resource key = component.getSpecification().getSpecificationLocation();
94
95 LocalizedPropertySource result = (LocalizedPropertySource) _localizedComponentSources
96 .get(key);
97
98 if (result == null)
99 {
100 result = new LocalizedPropertySource(getSourceForComponent(component));
101
102 _localizedComponentSources.put(key, result);
103 }
104
105 return result;
106 }
107
108 private synchronized LocalizedPropertySource getLocalizedSourceForNamespace(INamespace namespace)
109 {
110 Resource key = namespace.getSpecificationLocation();
111
112 LocalizedPropertySource result = (LocalizedPropertySource) _localizedNamespaceSources
113 .get(key);
114
115 if (result == null)
116 {
117 result = new LocalizedPropertySource(getSourceForNamespace(namespace));
118
119 _localizedNamespaceSources.put(key, result);
120 }
121
122 return result;
123 }
124
125 private IPropertySource createSourceForComponent(IComponent component)
126 {
127 IComponentSpecification specification = component.getSpecification();
128
129 List sources = new ArrayList ();
130
131 sources.add(new PropertyHolderPropertySource(specification));
132 sources.add(getSourceForNamespace(component.getNamespace()));
133
134 return (IPropertySource) _chainBuilder.buildImplementation(
135 IPropertySource.class,
136 sources,
137 ImplMessages.componentPropertySourceDescription(specification));
138 }
139
140 private IPropertySource createSourceForNamespace(INamespace namespace)
141 {
142 List sources = new ArrayList ();
143
144 sources.add(new PropertyHolderPropertySource(namespace.getSpecification()));
145 sources.add(_globalProperties);
146
147 return (IPropertySource) _chainBuilder.buildImplementation(
148 IPropertySource.class,
149 sources,
150 ImplMessages.namespacePropertySourceDescription(namespace));
151 }
152
153 public String getComponentProperty(IComponent component, String propertyName)
154 {
155 return getSourceForComponent(component).getPropertyValue(propertyName);
156 }
157
158 public String getLocalizedComponentProperty(IComponent component, Locale locale,
159 String propertyName)
160 {
161 return getLocalizedSourceForComponent(component).getPropertyValue(propertyName, locale);
162 }
163
164 public String getNamespaceProperty(INamespace namespace, String propertyName)
165 {
166 return getSourceForNamespace(namespace).getPropertyValue(propertyName);
167 }
168
169 public String getLocalizedNamespaceProperty(INamespace namespace, Locale locale,
170 String propertyName)
171 {
172 return getLocalizedSourceForNamespace(namespace).getPropertyValue(propertyName, locale);
173 }
174
175 public void setChainBuilder(ChainBuilder chainBuilder)
176 {
177 _chainBuilder = chainBuilder;
178 }
179
180 public void setGlobalProperties(IPropertySource globalProperties)
181 {
182 _globalProperties = globalProperties;
183 }
184 } |
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