Крейн Д., Паскарелло Э., Джеймс Д,. AJAX в действии / Ajax в действии / Исходники примеров / ajaxinactioncode_03nov2005 / ch11 / server_src / src / com / manning / ajaxinaction / planets / PlanetUpdateCommandProcessor

package com.manning.ajaxinaction.planets;

import java.beans.Statement;

import org.jdom.Element;

import com.manning.ajaxinaction.command.XMLCommandProcessor;

/**
* @author crane
*/
public class PlanetUpdateCommandProcessor implements XMLCommandProcessor {

public PlanetUpdateCommandProcessor() {
super();
}

public Element processXML(Element el) {
Element result=new Element("command");
String id=el.getAttributeValue("id");
result.setAttribute("id",id);
String status=null;
String reason=null;
String planetId=el.getAttributeValue("planetId");
String field=el.getAttributeValue("field");
String value=el.getAttributeValue("value");
Planet planet=findPlanet(planetId);
if (planet==null){
status="failed";
reason="no planet found for id "+planetId;
}else{
Double numValue=new Double(value);
Object[] args=new Object[]{ numValue };
String method="set"+field.substring(0,1).toUpperCase()+field.substring(1);
Statement statement=new Statement(planet,method,args);
try {
statement.execute();
status="ok";
} catch (Exception e) {
status="failed";
reason="unable to set value "+value+" for field "+field;
}
}
result.setAttribute("status",status);
if (reason!=null){
result.setAttribute("reason",reason);
}
return result;
}

/**
* @param planetId
* @return
*/
private Planet findPlanet(String planetId) {
// TODO use hibernate
return null;
}

}