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/*
Wotonomy: OpenStep design patterns for pure Java applications.
Copyright (C) 2001 Michael Powers
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, see http://www.gnu.org
*/
package net.wotonomy.control;
/**
* EOFaultHandler defines the contract for objects that can
* create and populate faults. In wotonomy, this interface is
* currently only a marker interface.
*
* @author michael@mpowers.net
* @author $Author: cgruber $
* @version $Revision: 893 $
*/
public abstract class EOFaultHandler {
protected Class _targetClass;
public EOFaultHandler() {
super();
}
public static EOFaultHandler handlerForFault(Object obj) {
if (!(obj instanceof EOFaulting))
throw new IllegalArgumentException("Object must implement EOFaulting");
return ((EOFaulting)obj).faultHandler();
}
public static boolean isFault(Object obj) {
if (obj == null)
return false;
boolean isit = (obj instanceof EOFaulting);
if (isit)
isit = ((EOFaulting)obj).isFault();
return isit;
}
public static void makeObjectIntoFault(Object obj, EOFaultHandler handler) {
if (!(obj instanceof EOFaulting))
throw new IllegalArgumentException("Object must implement EOFaulting");
((EOFaulting)obj).turnIntoFault(handler);
}
public static void clearFault(Object obj) {
if (!(obj instanceof EOFaulting))
throw new IllegalArgumentException("Object must implement EOFaulting");
((EOFaulting)obj).clearFault();
}
public Class targetClass() {
return _targetClass;
}
public Object createFaultForDeferredFault(Object fault, EOEnterpriseObject source) {
return fault;
}
public String descriptionForObject(Object obj) {
if (obj == null)
return "<null>";
return obj.toString();
}
public String eoShallowDescription(Object obj) {
return null;
}
public abstract void completeInitializationOfObject(Object obj);
public abstract void faultWillFire(Object obj);
}
/*
* $Log$
* Revision 1.1 2006/02/16 13:19:57 cgruber
* Check in all sources in eclipse-friendly maven-enabled packages.
*
* Revision 1.2 2003/08/19 01:53:12 chochos
* EOObjectStore had some incompatible return types (Object instead of EOEnterpriseObject, in fault methods mostly). It's internally consistent but I hope it doesn't break anything based on this, even though fault methods mostly throw exceptions for now.
*
* Revision 1.1 2001/11/13 04:13:59 mpowers
* Added interfaces needed to begin work on EOCustomObject.
*
*/
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