jdraft metaprogramming example following the JavaParser Example presented by Luca Molteni

test.othertools.JavaParserLucaAccumulateTest.java

package test.othertools;

import junit.framework.TestCase;
import org.jdraft._method;
import org.jdraft.pattern.$typeRef;

/**
 * Luca Molteni presented an example at the Voxxed Days Ticino 2019  
 * https://youtu.be/1pSj6OQsq9k?list=PLRsbF2sD7JVorYibvQrrG34UQ6YE3PaVP&t=2214
 * replaced using jdraft API
 */
public class JavaParserLucaAccumulateTest extends TestCase {

    public void testAcc() {
        System.out.println ( generateAccumulate(int.class) );
        System.out.println ( generateAccumulate(float.class) );
        System.out.println ( generateAccumulate(double.class) );
        System.out.println ( generateAccumulate(String.class) );
    }

    public _method generateAccumulate( Class primitiveType ){
        _method _m = _method.of(new Object(){
            public int accumulate( int[] nums){
                int acc = 0;
                for( int n : nums ) {
                    acc = acc + n;
                }
                return acc;
            }
        });
        $typeRef.as(int[].class).replaceIn(_m, primitiveType.getCanonicalName()+"[]");
        $typeRef.as(int.class).replaceIn(_m, primitiveType);
        return _m;
    }
}