OGNL Part 8: Lambda without closures

The part 7 is a tutorial on Selection. Here I explain the very easy example from the OGNL language guide. This is factorial function as shown in the following example.

package au.com.ojitha.ongl;

import ognl.Ognl;
import ognl.OgnlException;

public class Lambda {

	/**
	 * @param args
	 * @throws OgnlException
	 */
	public static void main(String[] args) throws OgnlException {
		System.out.println(Ognl.getValue(
				"#fact = :[#this <=1 ? 1 : #this*#fact(#this-1)], #fact(4)",
				null));

	}

}

 

The output is 4*3*2*1=24.