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TSL2 Framework Descriptor (currency-handling, generic formatter, descriptors for beans, collections, actions and values)
/*
* File: $HeadURL$
* Id : $Id$
*
* created by: Tom
* created on: 16.02.2014
*
* Copyright: (c) Thomas Schneider 2014, all rights reserved
*/
package de.tsl2.nano.bean.def;
import java.lang.reflect.Method;
import org.simpleframework.xml.Default;
import org.simpleframework.xml.DefaultType;
import de.tsl2.nano.bean.IValueAccess;
import de.tsl2.nano.core.ManagedException;
import de.tsl2.nano.core.cls.BeanAttribute;
import de.tsl2.nano.core.cls.BeanClass;
import de.tsl2.nano.core.messaging.EventController;
import de.tsl2.nano.core.util.CollectionUtil;
/**
* resolves relations through a path to several beans/attributes
*
* @author Tom
* @version $Revision$
*/
@SuppressWarnings("unchecked")
@Default(value = DefaultType.FIELD, required = false)
public class ValuePath extends PathExpression implements IValueAccess {
/** serialVersionUID */
private static final long serialVersionUID = 1L;
transient B instance;
transient EventController eventController;
protected ValuePath() {
}
public ValuePath(B instance, String attributeChain) {
this((Class) instance.getClass(), instance,
(Class) Object.class, splitChain(attributeChain));
}
/**
* constructor
*
* @param declaringClass
* @param attributePath
* @param instance
*/
protected ValuePath(Class declaringClass, B instance, Class type, String... attributeChain) {
super(declaringClass, type, attributeChain);
this.instance = instance;
}
/**
* {@inheritDoc}
*/
@Override
public T getValue() {
return (T) BeanClass.getValue(instance, attributePath);
}
/**
* {@inheritDoc}
*/
@Override
public void setValue(T object) {
Object lastInstance;
if (attributePath.length > 1) {
lastInstance =
BeanClass.getValue(instance,
CollectionUtil.copyOfRange(attributePath, 0, attributePath.length - 2, String[].class));
} else {
lastInstance = instance;
}
BeanAttribute.getBeanAttribute(BeanClass.getDefiningClass(lastInstance.getClass()),
attributePath[attributePath.length - 1]).setValue(lastInstance, object);
}
/**
* @param instance The instance to set.
*/
protected void setInstance(B instance) {
this.instance = instance;
}
/**
* {@inheritDoc}
*/
@Override
public EventController changeHandler() {
if (eventController == null) {
eventController = new EventController();
}
return eventController;
}
static Method getReadAccessMethod() {
try {
return ValuePath.class.getMethod(ATTR_VALUE, new Class[0]);
} catch (Exception e) {
ManagedException.forward(e);
return null;
}
}
}