|
1 package org.jbpm.instantiation;
2
3 import java.lang.reflect.*;
4 import org.apache.commons.logging.*;
5 import org.dom4j.*;
6
7 public class XmlInstantiator implements Instantiator {
8
9 private static final Class  [] parameterTypes = new Class [] {Element.class};
10
11 public Object instantiate(Class clazz, String configuration) {
12 Object newInstance = null;
13 try {
14 Element configurationElement = parseConfiguration(configuration);
16
17 Constructor constructor = clazz.getDeclaredConstructor( parameterTypes );
18 constructor.setAccessible(true);
19 newInstance = constructor.newInstance( new Object [] { configurationElement } );
20 } catch (Exception e) {
21 log.error( "couldn't instantiate '" + clazz.getName() + "'", e );
22 throw new RuntimeException ( e );
23 }
24 return newInstance;
25 }
26
27 protected Element parseConfiguration(String configuration) {
28 Element element = null;
29 try {
30 element = DocumentHelper.parseText( "<action>"+configuration+"</action>" ).getRootElement();
31 } catch (DocumentException e) {
32 log.error( "couldn't parse bean configuration : " + configuration, e );
33 throw new RuntimeException (e);
34 }
35 return element;
36 }
37
38 private static final Log log = LogFactory.getLog(XmlInstantiator.class);
39 }
40 |
Popular Tags |
Java API By Example, From Geeks To Geeks.