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1   /*
2    * Copyright 2001-2004 The Apache Software Foundation.
3    * 
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    * 
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    * 
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  
17  
18  package org.apache.commons.modeler.modules;
19  
20  import java.io.InputStream;
21  import java.net.URL;
22  import java.util.ArrayList;
23  import java.util.List;
24  
25  import org.apache.commons.digester.Digester;
26  import org.apache.commons.logging.Log;
27  import org.apache.commons.logging.LogFactory;
28  import org.apache.commons.modeler.Registry;
29  
30  public class MbeansDescriptorsDigesterSource extends ModelerSource
31  {
32      private static Log log =
33              LogFactory.getLog(MbeansDescriptorsDigesterSource.class);
34  
35      Registry registry;
36      String location;
37      String type;
38      Object source;
39      List mbeans=new ArrayList();
40  
41      public void setRegistry(Registry reg) {
42          this.registry=reg;
43      }
44  
45      public void setLocation( String loc ) {
46          this.location=loc;
47      }
48  
49      /*** Used if a single component is loaded
50       *
51       * @param type
52       */
53      public void setType( String type ) {
54         this.type=type;
55      }
56  
57      public void setSource( Object source ) {
58          this.source=source;
59      }
60  
61      public List loadDescriptors( Registry registry, String location,
62                                   String type, Object source)
63              throws Exception
64      {
65          setRegistry(registry);
66          setLocation(location);
67          setType(type);
68          setSource(source);
69          execute();
70          return mbeans;
71      }
72  
73      public void execute() throws Exception {
74          if( registry==null ) registry=Registry.getRegistry();
75  
76          InputStream stream=(InputStream)source;
77  
78          long t1=System.currentTimeMillis();
79  
80          Digester digester = new Digester();
81          digester.setNamespaceAware(false);
82          digester.setValidating(false);
83          URL url = registry.getClass().getResource
84                  ("/org/apache/commons/modeler/mbeans-descriptors.dtd");
85          digester.register
86                  ("-//Apache Software Foundation//DTD Model MBeans Configuration File",
87                          url.toString());
88  
89          // Push our registry object onto the stack
90          digester.push(mbeans);
91  
92          // Configure the parsing rules
93          digester.addObjectCreate
94                  ("mbeans-descriptors/mbean",
95                          "org.apache.commons.modeler.ManagedBean");
96          digester.addSetProperties
97                  ("mbeans-descriptors/mbean");
98          digester.addSetNext
99                  ("mbeans-descriptors/mbean",
100                         "add",
101                         "java.lang.Object");
102 
103         digester.addObjectCreate
104                 ("mbeans-descriptors/mbean/attribute",
105                         "org.apache.commons.modeler.AttributeInfo");
106         digester.addSetProperties
107                 ("mbeans-descriptors/mbean/attribute");
108         digester.addSetNext
109                 ("mbeans-descriptors/mbean/attribute",
110                         "addAttribute",
111                         "org.apache.commons.modeler.AttributeInfo");
112 
113         digester.addObjectCreate
114             ("mbeans-descriptors/mbean/attribute/descriptor/field",
115              "org.apache.commons.modeler.FieldInfo");
116         digester.addSetProperties
117             ("mbeans-descriptors/mbean/attribute/descriptor/field");
118         digester.addSetNext
119             ("mbeans-descriptors/mbean/attribute/descriptor/field",
120              "addField",
121              "org.apache.commons.modeler.FieldInfo");
122 
123         digester.addObjectCreate
124                 ("mbeans-descriptors/mbean/constructor",
125                         "org.apache.commons.modeler.ConstructorInfo");
126         digester.addSetProperties
127                 ("mbeans-descriptors/mbean/constructor");
128         digester.addSetNext
129                 ("mbeans-descriptors/mbean/constructor",
130                         "addConstructor",
131                         "org.apache.commons.modeler.ConstructorInfo");
132 
133         digester.addObjectCreate
134             ("mbeans-descriptors/mbean/constructor/descriptor/field",
135              "org.apache.commons.modeler.FieldInfo");
136         digester.addSetProperties
137             ("mbeans-descriptors/mbean/constructor/descriptor/field");
138         digester.addSetNext
139             ("mbeans-descriptors/mbean/constructor/descriptor/field",
140              "addField",
141              "org.apache.commons.modeler.FieldInfo");
142 
143         digester.addObjectCreate
144                 ("mbeans-descriptors/mbean/constructor/parameter",
145                         "org.apache.commons.modeler.ParameterInfo");
146         digester.addSetProperties
147                 ("mbeans-descriptors/mbean/constructor/parameter");
148         digester.addSetNext
149                 ("mbeans-descriptors/mbean/constructor/parameter",
150                         "addParameter",
151                         "org.apache.commons.modeler.ParameterInfo");
152 
153         digester.addObjectCreate
154             ("mbeans-descriptors/mbean/descriptor/field",
155              "org.apache.commons.modeler.FieldInfo");
156         digester.addSetProperties
157             ("mbeans-descriptors/mbean/descriptor/field");
158         digester.addSetNext
159             ("mbeans-descriptors/mbean/descriptor/field",
160              "addField",
161              "org.apache.commons.modeler.FieldInfo");
162 
163         digester.addObjectCreate
164                 ("mbeans-descriptors/mbean/notification",
165                         "org.apache.commons.modeler.NotificationInfo");
166         digester.addSetProperties
167                 ("mbeans-descriptors/mbean/notification");
168         digester.addSetNext
169                 ("mbeans-descriptors/mbean/notification",
170                         "addNotification",
171                         "org.apache.commons.modeler.NotificationInfo");
172 
173         digester.addObjectCreate
174             ("mbeans-descriptors/mbean/notification/descriptor/field",
175              "org.apache.commons.modeler.FieldInfo");
176         digester.addSetProperties
177             ("mbeans-descriptors/mbean/notification/descriptor/field");
178         digester.addSetNext
179             ("mbeans-descriptors/mbean/notification/descriptor/field",
180              "addField",
181              "org.apache.commons.modeler.FieldInfo");
182 
183         digester.addCallMethod
184                 ("mbeans-descriptors/mbean/notification/notification-type",
185                         "addNotifType", 0);
186 
187         digester.addObjectCreate
188                 ("mbeans-descriptors/mbean/operation",
189                         "org.apache.commons.modeler.OperationInfo");
190         digester.addSetProperties
191                 ("mbeans-descriptors/mbean/operation");
192         digester.addSetNext
193                 ("mbeans-descriptors/mbean/operation",
194                         "addOperation",
195                         "org.apache.commons.modeler.OperationInfo");
196 
197         digester.addObjectCreate
198             ("mbeans-descriptors/mbean/operation/descriptor/field",
199              "org.apache.commons.modeler.FieldInfo");
200         digester.addSetProperties
201             ("mbeans-descriptors/mbean/operation/descriptor/field");
202         digester.addSetNext
203             ("mbeans-descriptors/mbean/operation/descriptor/field",
204              "addField",
205              "org.apache.commons.modeler.FieldInfo");
206 
207         digester.addObjectCreate
208                 ("mbeans-descriptors/mbean/operation/parameter",
209                         "org.apache.commons.modeler.ParameterInfo");
210         digester.addSetProperties
211                 ("mbeans-descriptors/mbean/operation/parameter");
212         digester.addSetNext
213                 ("mbeans-descriptors/mbean/operation/parameter",
214                         "addParameter",
215                         "org.apache.commons.modeler.ParameterInfo");
216 
217         // Process the input file to configure our registry
218         try {
219             digester.parse(stream);
220         } catch (Exception e) {
221             log.error("Error digesting Registry data", e);
222             throw e;
223         }
224         long t2=System.currentTimeMillis();
225 //        if( t2-t1 > 500 )
226         log.info("Loaded registry information (digester) " + ( t2 - t1 ) + " ms");
227     }
228 }