/*
* Copyright (C) NetStruxr, Inc. All rights reserved.
*
* This software is published under the terms of the NetStruxr
* Public Software License version 0.5, a copy of which has been
* included with this distribution in the LICENSE.NPL file. */
package er.extensions.components.conditionals;
import com.webobjects.appserver.WOAssociation;
import com.webobjects.appserver.WOComponent;
import com.webobjects.appserver.WOElement;
import com.webobjects.appserver._private.WODynamicElementCreationException;
import com.webobjects.foundation.NSDictionary;
import com.webobjects.foundation.NSForwardException;
import er.extensions.foundation.ERXPatcher;
/**
* Conditional component that tests if an object can be cast to the given class or interface without causing a ClassCastException.
*
* <p>
* Synopsis:
* <blockquote>object=<i>anObject</i>;className=<i>aClassName2</i>;[negate=<i>aBoolean</i>;]</blockquote>
* </p>
*
* @binding object object to test
* @binding className class or interface name
* @binding negate Inverts the sense of the conditional.
*/
public class ERXInstanceOfConditional extends ERXWOConditional {
protected WOAssociation _object;
protected WOAssociation _className;
public ERXInstanceOfConditional(String aName, NSDictionary aDict, WOElement aElement) {
super(aName, aDict, aElement);
}
@Override
protected void pullAssociations(NSDictionary<String, ? extends WOAssociation> dict) {
_object = dict.objectForKey("object");
_className = dict.objectForKey("className");
if (_object == null || _className == null) {
throw new WODynamicElementCreationException("className and object must be bound");
}
}
/**
* Tests if the bound object is an instance of the class. Note: If the class
* is not found a ClassNotFoundException will be thrown via an
* NSForwardException.
*/
@Override
protected boolean conditionInComponent(WOComponent component) {
Object o = _object.valueInComponent(component);
String className = (String) _className.valueInComponent(component);
Class c = ERXPatcher.classForName(className);
if (c == null) {
throw new NSForwardException(new ClassNotFoundException(className));
}
return c.isInstance(o);
}
}