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/* DynamicPropertyELResolver.java
Purpose:
Description:
History:
2012/11/20 Created by dennis
Copyright (C) 2011 Potix Corporation. All Rights Reserved.
*/
package org.zkoss.bind.xel.zel;
import java.beans.FeatureDescriptor;
import java.util.Iterator;
import org.zkoss.zel.BeanELResolver;
import org.zkoss.zel.ELContext;
import org.zkoss.zel.ELException;
import org.zkoss.zel.PropertyNotFoundException;
import org.zkoss.zel.PropertyNotWritableException;
import org.zkoss.zk.ui.ext.DynamicPropertied;
/**
* A resolver to resolve value base on BeanELResolver and DynamicPropertied.
* It only handle evaluation when a base object's type is DynamicPropertied
* @author dennis
* @since 6.5.1
*/
public class DynamicPropertiedELResolver extends BeanELResolver {
public DynamicPropertiedELResolver() {
super(false);
}
public Object getValue(ELContext context, Object base, Object property)
throws NullPointerException, PropertyNotFoundException, ELException {
if (context == null) {
throw new NullPointerException();
}
Object val = null;
if (base instanceof DynamicPropertied) {
//don't get value before check it types(DynamicPropertied), to prevent call super
//BeanELResolver too early before other resolvers
try {
val = super.getValue(context, base, property);
} catch (PropertyNotFoundException x) {
if (((DynamicPropertied) base).hasDynamicProperty(property.toString())) {
context.setPropertyResolved(true);
val = ((DynamicPropertied) base).getDynamicProperty(property.toString());
} else {
context.setPropertyResolved(false); //super always set resolved to true, reset it
}
}
}
return val;
}
public Class getType(ELContext context, Object base, Object property)
throws NullPointerException, PropertyNotFoundException, ELException {
Class type = null;
if (base instanceof DynamicPropertied) {
//don't get value before check it types, , to prevent call super
//BeanELResolver too early before other resolvers
try {
type = super.getType(context, base, property);
} catch (PropertyNotFoundException x) {
context.setPropertyResolved(true);
type = Object.class;
}
}
return type;
}
public void setValue(ELContext context, Object base, Object property, Object value)
throws NullPointerException, PropertyNotFoundException, PropertyNotWritableException, ELException {
if (base instanceof DynamicPropertied) {
//don't get value before check it types, , to prevent call super
//BeanELResolver too early before other resolvers
try {
super.setValue(context, base, property, value);
} catch (PropertyNotFoundException x) {
context.setPropertyResolved(true);
((DynamicPropertied) base).setDynamicProperty(property.toString(), value);
}
}
}
public boolean isReadOnly(ELContext context, Object base, Object property)
throws NullPointerException, PropertyNotFoundException, ELException {
if (base instanceof DynamicPropertied) {
return super.isReadOnly(context, base, property);
}
return true;
}
public Iterator getFeatureDescriptors(ELContext context, Object base) {
return null;
}
public Class getCommonPropertyType(ELContext context, Object base) {
return null;
}
public Object invoke(ELContext context, Object base, Object method, Class[] paramTypes, Object[] params) {
return null;
}
}
