package org.hibernate.test.dynamicentity;
import java.io.Serializable;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.util.HashMap;
/**
* A simple {@link InvocationHandler} to act as the handler for our generated
* {@link java.lang.reflect.Proxy}-based entity instances.
* <p/>
* This is a trivial impl which simply keeps the property values into
* a Map.
*
* @author <a href="mailto:steve@hibernate.org">Steve Ebersole </a>
*/
public final class DataProxyHandler implements InvocationHandler {
private String entityName;
private HashMap data = new HashMap();
public DataProxyHandler(String entityName, Serializable id) {
this.entityName = entityName;
data.put( "Id", id );
}
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
String methodName = method.getName();
if ( methodName.startsWith( "set" ) ) {
String propertyName = methodName.substring( 3 );
data.put( propertyName, args[0] );
}
else if ( methodName.startsWith( "get" ) ) {
String propertyName = methodName.substring( 3 );
return data.get( propertyName );
}
else if ( "toString".equals( methodName ) ) {
return entityName + "#" + data.get( "Id" );
}
else if ( "hashCode".equals( methodName ) ) {
return new Integer( this.hashCode() );
}
return null;
}
public String getEntityName() {
return entityName;
}
public HashMap getData() {
return data;
}
}