What is the best way to get all parameters in process action

[ravisha andar]

Hi All,

The JSp if I have input input parameters.

What is the best way to get all the parameters in process action , set in a bean and make the bean accessable in render.

Right now i have used getParamerMap, but i dont know how to set the values in the bean

Can anybody help me

I have posted this query in another forum
https://www.ibm.com/developerworks/forums/thread.jspa?threadID=388787
Thanks

[Philip Thamaravelil]

Ravisha,
There are lot's of ways to accomplish this, but here is a sample of how to call your bean setters in a way that is reusable across all beans.

import java.lang.reflect.Method;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;

.....
public class BindHelper {
....
	public static Object bind( Object bean, Map parameterMap) throws Exception{
		
		Method[] methods = bean.getClass().getMethods();

		//traverse you parameter Map here..
		Iterator entries = parameterMap.entrySet().iterator();
		while (entries.hasNext()) {
			Entry e = (Entry) entries.next();
			Object key = e.getKey();
			String value = String.valueOf(e.getValue());
			
			for( Method m : methods){
				//determine if it's a setter method in your bean.
				if( m.getName().indexOf("set") > 0 && m.getName().toLowerCase().indexOf(value.toLowerCase()) >= 0){
					
					//build your argument object using reflection. 
					Object a = m.getParameterTypes()[0].getConstructor().newInstance(new Object[]{value});
					
					//call the setter method
					m.invoke(bean, a);
					
				}
			}
		}
		
		return bean;
	}

So in your servlet or portlet, you do something like...

      Object myBean = BindHelper.bind( myBean, request.getParameterMap());

In order for this to work...you'll need to set the name attribute on your input elements to the corresponding name of your bean..

For example, your JSP might look like...

<input name="firstName" value="" /> <input name="lastName" value="" />



Hope these few examples will give you some idea of what to do. Good luck!
Philip Thamaravelil

[Philip Thamaravelil]

If your using a ORM solution, you might look through the API's of your specific ORM vendor. They often have solutions for your question. Hibernate works well in this scenario, and IMO it's also good to understand what's happining under the hood.