package org.simantics.g3d.objmap.rules.range;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

import org.simantics.objmap.MappingException;
import org.simantics.objmap.rules.range.IRangeAccessor;

/**
 * Accessor for mapped objects. Uses two methods:
 * - Getter: returns the current object.
 * - Setter: sets the current object. The object may be null.
 * 
 * @author Marko Luukkainen <marko.luukkainen@vtt.fi>
 *
 * @param <T>
 */
public class GetSetObjectAccessor<T>  implements IRangeAccessor<T> {
	
	private Method getter;
	private Method setter;
	
	
	public GetSetObjectAccessor(Method getter, Method setter) {
		this.getter = getter;
		this.setter = setter;
		
	}
	
	@SuppressWarnings("unchecked")
	public T get(Object element) throws org.simantics.objmap.MappingException {
		try {
			return (T) getter.invoke(element);
		} catch (IllegalArgumentException e) {
			throw new MappingException(e);
		} catch (IllegalAccessException e) {
			throw new MappingException(e);
		} catch (InvocationTargetException e) {
			throw new MappingException(e);
		}
	};

	@Override
	public boolean set(Object element, T value)
			throws MappingException {	
		try {
			setter.invoke(element, value);
		} catch (IllegalArgumentException e) {
			throw new MappingException(e);
		} catch (IllegalAccessException e) {
			throw new MappingException(e);
		} catch (InvocationTargetException e) {
			throw new MappingException(e);
		}
		return true;
		
	}
}