//----------------------------------------------------------------------------
// Copyright (C) 2011 Ingrid Nunes
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// To contact the authors:
// http://inf.ufrgs.br/prosoft/bdi4jade/
//
//----------------------------------------------------------------------------
package bdi4jade.belief;
import java.lang.reflect.Field;
import bdi4jade.core.Capability;
/**
* This class extends the {@link AbstractBelief} class and represents a belief
* stored in an attribute of a capability.
*
* @author Ingrid Nunes
*
* @param <V>
* the type of the belief value.
*/
public class AttributeBelief<V> extends AbstractBelief<String, V> {
private static final long serialVersionUID = 6600374179600475835L;
private final Field field;
private final Capability object;
/**
* Initializes an attribute belief with the field that represents the belief
* and the capability it belongs to.
*
* @param object
* the capability to which this belief belongs to.
* @param field
* the field that represents this belief.
*/
public AttributeBelief(Capability object, Field field) {
super(field.getName());
this.object = object;
this.field = field;
}
/**
* Gets the value from the field that represents this belief.
*
* @see bdi4jade.belief.Belief#getValue()
*/
@SuppressWarnings("unchecked")
@Override
public V getValue() {
field.setAccessible(true);
V value = null;
try {
value = (V) field.get(object);
} catch (IllegalAccessException iae) {
}
field.setAccessible(false);
return value;
}
/**
* Sets the value given as parameter in the field that represents this
* belief.
*
* @see bdi4jade.belief.AbstractBelief#updateValue(java.lang.Object)
*/
@Override
protected void updateValue(V value) {
field.setAccessible(true);
try {
field.set(object, value);
} catch (IllegalAccessException iae) {
}
field.setAccessible(false);
}
}