[Snmap-developer] SNMAP/src/net/sf/snmap/property DirectPropertyAccessor.java,NONE,1.1

[arden l. <ar...@us...>]

Update of /cvsroot/snmap/SNMAP/src/net/sf/snmap/property
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv29714/src/net/sf/snmap/property

Added Files:
	DirectPropertyAccessor.java 
Log Message:


--- NEW FILE: DirectPropertyAccessor.java ---
//$Id$
package net.sf.snmap.property;

import java.lang.reflect.Field;
import java.lang.reflect.Method;

import net.sf.snmap.PropertyAccessException;
import net.sf.snmap.PropertyNotFoundException;
import net.sf.snmap.SnmapException;
import net.sf.snmap.util.ReflectHelper;

/**
 * Accesses fields directly.
 * 
 * @author Gavin King
 */
public class DirectPropertyAccessor implements PropertyAccessor {

	public static final class DirectGetter implements Getter {
		private static final long serialVersionUID = -6883616998837775509L;

		private final transient Field field;

		private final Class clazz;

		private final String name;

		DirectGetter(Field field, Class clazz, String name) {
			this.field = field;
			this.clazz = clazz;
			this.name = name;
		}

		public Object get(Object target) throws SnmapException {
			try {
				return field.get(target);
			} catch (Exception e) {
				throw new PropertyAccessException(e,
						"could not get a field value by reflection", false,
						clazz, name);
			}
		}

		public Object getForInsert(Object target) {
			return get(target);
		}

		public Method getMethod() {
			return null;
		}

		public String getMethodName() {
			return null;
		}

		public Class getReturnType() {
			return field.getType();
		}

		Object readResolve() {
			return new DirectGetter(getField(clazz, name), clazz, name);
		}

		public String toString() {
			return "DirectGetter(" + clazz.getName() + '.' + name + ')';
		}
	}

	public static final class DirectSetter implements Setter {
		private static final long serialVersionUID = 3629766642024955521L;

		private final transient Field field;

		private final Class clazz;

		private final String name;

		DirectSetter(Field field, Class clazz, String name) {
			this.field = field;
			this.clazz = clazz;
			this.name = name;
		}

		public Method getMethod() {
			return null;
		}

		public String getMethodName() {
			return null;
		}

		public void set(Object target, Object value) throws SnmapException {
			try {
				field.set(target, value);
			} catch (Exception e) {
				throw new PropertyAccessException(e,
						"could not set a field value by reflection", true,
						clazz, name);
			}
		}

		public String toString() {
			return "DirectSetter(" + clazz.getName() + '.' + name + ')';
		}

		Object readResolve() {
			return new DirectSetter(getField(clazz, name), clazz, name);
		}
	}

	private static Field getField(Class clazz, String name)
			throws PropertyNotFoundException {
		if (clazz == null || clazz == Object.class) {
			// TODO: we should report what class we started searching for the
			// property - right now it will always end on. Object.class.
			throw new PropertyNotFoundException("field not found: " + name);
		}
		Field field;
		try {
			field = clazz.getDeclaredField(name);
		} catch (NoSuchFieldException nsfe) {
			field = getField(clazz.getSuperclass(), name);
		}
		if (!ReflectHelper.isPublic(clazz, field))
			field.setAccessible(true);
		return field;
	}

	public Getter getGetter(Class theClass, String propertyName)
			throws PropertyNotFoundException {
		return new DirectGetter(getField(theClass, propertyName), theClass,
				propertyName);
	}

	public Setter getSetter(Class theClass, String propertyName)
			throws PropertyNotFoundException {
		return new DirectSetter(getField(theClass, propertyName), theClass,
				propertyName);
	}

}