BeanInstantiator


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 BeanInstantiator extends FieldInstantiator implements Instantiator {
8     
9     protected void setPropertyValue(Class   clazz, Object   newInstance, String   propertyName, Element propertyElement) {
10      try {
11        // create the setter method name from the property name
12        String   setterMethodName = "set"+propertyName.substring(0,1).toUpperCase()+propertyName.substring(1);
13        
14        // find the setter method
15        Method[] methods = clazz.getDeclaredMethods();
16        Method method = null;
17        Class   propertyType = null;
18        for( int i=0; ( (i<methods.length)
19                        && (method==null) ); i++) {
20          if ( (setterMethodName.equals(methods[i].getName()))
21               && (methods[i].getParameterTypes()!=null)
22               && (methods[i].getParameterTypes().length==1) ) {
23            method = methods[i];
24            propertyType = methods[i].getParameterTypes()[0];
25          }
26        }
27        
28        // if the setter method was found
29        if (method!=null) {
30          // make it accessible
31          method.setAccessible(true);
32          // invoke it
33          method.invoke(newInstance, new Object  []{ getValue(propertyType, propertyElement) });
34        } else {
35          log.error( "couldn't set property '"+propertyName+"' to value '"+propertyElement.asXML()+"'" );
36        }
37      } catch (Exception   e) {
38        log.error( "couldn't parse property '"+propertyName+"' to value '"+propertyElement.asXML()+"'", e );
39      }
40    }
41    
42    private static final Log log = LogFactory.getLog(BeanInstantiator.class);
43  }
44  
45
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