1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
|
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.tuscany.sca.assembly.xml;
import static javax.xml.stream.XMLStreamConstants.END_ELEMENT;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.XMLStreamWriter;
import org.apache.tuscany.sca.assembly.Base;
import org.apache.tuscany.sca.assembly.ComponentType;
import org.apache.tuscany.sca.assembly.Implementation;
import org.apache.tuscany.sca.contribution.processor.ContributionReadException;
import org.apache.tuscany.sca.contribution.processor.ContributionResolveException;
import org.apache.tuscany.sca.contribution.processor.ContributionWriteException;
import org.apache.tuscany.sca.contribution.processor.ProcessorContext;
import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor;
import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
import org.apache.tuscany.sca.core.FactoryExtensionPoint;
import org.apache.tuscany.sca.policy.PolicySubject;
/**
* Default Model Processor for beans.
*
* @version $Rev$ $Date$
*/
public class DefaultBeanModelProcessor<T> extends BaseAssemblyProcessor implements StAXArtifactProcessor<T> {
private QName artifactType;
private Class<T> modelClass;
private Object modelFactory;
private Method factoryMethod;
private Map<String, Method> setterMethods = new HashMap<String, Method>();
private Map<String, Method> getterMethods = new HashMap<String, Method>();
public DefaultBeanModelProcessor(FactoryExtensionPoint modeFactories,
QName artifactType,
Class<T> modelClass,
Object modelFactory) {
super(modeFactories, null);
this.artifactType = artifactType;
this.modelClass = modelClass;
this.modelFactory = modelFactory;
// Introspect the factory class and bean model class
if (modelFactory != null) {
// Find the model create method
for (Method method: modelFactory.getClass().getMethods()) {
if (method.getName().startsWith("create") && method.getReturnType() == modelClass) {
factoryMethod = method;
break;
}
}
}
// Index the bean's setter methods
for (Method method: modelClass.getMethods()) {
Method getter;
String name = method.getName();
if (name.startsWith("set") && name.length() > 3) {
// Get the corresponding getter method
try {
getter = modelClass.getMethod("get" + name.substring(3));
} catch (Exception e) {
getter = null;
continue;
}
// Get the property name
name = name.substring(3);
if (name.length() > 1) {
if (!name.toUpperCase().equals(name)) {
name = name.substring(0, 1).toLowerCase() + name.substring(1);
}
}
} else {
continue;
}
// Map an uppercase property name to a lowercase attribute name
if (name.toUpperCase().equals(name)) {
name = name.toLowerCase();
}
// Trim trailing _ from property names
if (name.endsWith("_")) {
name = name.substring(0, name.length()-1);
}
setterMethods.put(name, method);
getterMethods.put(name, getter);
}
}
public T read(XMLStreamReader reader, ProcessorContext context) throws ContributionReadException, XMLStreamException {
// Read an element
try {
// Create a new instance of the model
Object model;
if (modelFactory != null) {
// Invoke the factory create method
model = factoryMethod.invoke(modelFactory);
} else {
// Invoke the model bean class default constructor
model = modelClass.newInstance();
}
// Initialize the bean properties with the attributes found in the
// XML element
for (int i = 0, n = reader.getAttributeCount(); i < n; i++) {
String attributeName = reader.getAttributeLocalName(i);
Method setter = setterMethods.get(attributeName);
if (setter != null) {
String value = null;
if (attributeName.equals("uri")){
value = getURIString(reader, "uri");
} else {
value = reader.getAttributeValue(i);
}
setter.invoke(model, value);
}
}
// Read policies
policyProcessor.readPolicies(model, reader);
// FIXME read extension elements
// By default mark the model object unresolved
if (model instanceof Base) {
((Base)model).setUnresolved(true);
}
// Skip to end element
while (reader.hasNext()) {
if (reader.next() == END_ELEMENT && artifactType.equals(reader.getName())) {
break;
}
}
return (T) model;
} catch (Exception e) {
ContributionReadException ce = new ContributionReadException(e);
error(context.getMonitor(), "ContributionReadException", reader, ce);
throw ce;
}
}
public void write(T bean, XMLStreamWriter writer, ProcessorContext context) throws ContributionWriteException, XMLStreamException {
try {
// Write the bean properties as attributes
List<XAttr> attrs = new ArrayList<XAttr>();
for (Map.Entry<String, Method> entry: getterMethods.entrySet()) {
if (entry.getValue().getReturnType() == String.class) {
String value = (String)entry.getValue().invoke(bean);
attrs.add(new XAttr(entry.getKey(), value));
}
}
// Write element
writeStart(writer, artifactType.getNamespaceURI(), artifactType.getLocalPart(),
policyProcessor.writePolicies(bean), new XAttr(null, attrs));
writeEnd(writer);
} catch (Exception e) {
ContributionWriteException ce = new ContributionWriteException(e);
error(context.getMonitor(), "ContributionWriteException", writer, ce);
throw ce;
}
}
public void resolve(T bean, ModelResolver resolver, ProcessorContext context) throws ContributionResolveException {
// Resolve and merge the component type associated with an
// implementation model
if (bean instanceof Implementation) {
Implementation implementation = (Implementation)bean;
String uri = implementation.getURI();
if (uri != null) {
int d = uri.lastIndexOf('.');
if (d != -1) {
uri = uri.substring(0, d) + ".componentType";
// Resolve the component type
ComponentType componentType = assemblyFactory.createComponentType();
componentType.setURI(uri);
componentType.setUnresolved(true);
componentType = resolver.resolveModel(ComponentType.class, componentType, context);
if (componentType != null && !componentType.isUnresolved()) {
// We found a component type, merge it into the implementation model
implementation.getServices().addAll(componentType.getServices());
implementation.getReferences().addAll(componentType.getReferences());
implementation.getProperties().addAll(componentType.getProperties());
if (implementation instanceof PolicySubject &&
componentType instanceof PolicySubject ) {
PolicySubject policiedImpl = (PolicySubject)implementation;
PolicySubject policiedCompType = (PolicySubject)componentType;
if ( policiedImpl.getPolicySets() != null) {
policiedImpl.getPolicySets().addAll(policiedCompType.getPolicySets());
}
if (policiedImpl.getRequiredIntents() != null) {
policiedImpl.getRequiredIntents().addAll(policiedCompType.getRequiredIntents());
}
}
}
}
}
}
// Mark the model resolved
if (bean instanceof Base) {
((Base)bean).setUnresolved(false);
}
}
public QName getArtifactType() {
return artifactType;
}
public Class<T> getModelType() {
return modelClass;
}
}
|
