PointFields.java

package jvstm.test.point.core;

import java.lang.reflect.Field;

/**
 * This is an utility class to read transactional object fields in-place
 * and avoiding the STM Barriers.
 * Typically the transactional classes properties use barriers, but for
 * unit tests purpose we may want to access the fields in-place.
 */
public class PointFields<T extends Number> {

    private final Field fieldX, fieldY;

    public PointFields(Class c) {
        try {
            this.fieldX = c.getDeclaredField("x");
            this.fieldY = c.getDeclaredField("y");
            this.fieldX.setAccessible(true);
            this.fieldY.setAccessible(true);
        } catch (NoSuchFieldException e) {
            throw new RuntimeException(e);
        } catch (SecurityException e) {
            throw new RuntimeException(e);
        }
    }

    public T getX(Point<T> p){
        try {
            return (T) fieldX.get(p);
        } catch (IllegalArgumentException e) {
            throw new RuntimeException(e);
        } catch (IllegalAccessException e) {
            throw new RuntimeException(e);
        }
    }

    public T getY(Point<T> p){
        try {
            return (T) fieldY.get(p);
        } catch (IllegalArgumentException e) {
            throw new RuntimeException(e);
        } catch (IllegalAccessException e) {
            throw new RuntimeException(e);
        }
    }

    public void setX(Point<T> p, Number val){
        try {
            fieldX.set(p, val);
        } catch (IllegalArgumentException e) {
            throw new RuntimeException(e);
        } catch (IllegalAccessException e) {
            throw new RuntimeException(e);
        }
    }

    public void setY(Point<T> p, Number val){
        try {
            fieldY.set(p, val);
        } catch (IllegalArgumentException e) {
            throw new RuntimeException(e);
        } catch (IllegalAccessException e) {
            throw new RuntimeException(e);
        }
    }

}