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/*
Wotonomy: OpenStep design patterns for pure Java applications.
Copyright (C) 2001 Intersect Software Corporation
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;
import net.wotonomy.foundation.internal.WotonomyException;
/**
* EONotQualifiier negates a specified qualifier,
* evaluating to the opposite of the specified qualifier.
*
* @author michael@mpowers.net
* @author yjcheung@intersectsoft.com
* @author $Author: cgruber $
* @version $Revision: 894 $
*/
public class EONotQualifier extends EOQualifier
implements EOKeyValueArchiving, EOQualifierEvaluation
{
private EOQualifier qualifier;
public EONotQualifier(
EOQualifier aQualifier )
{
qualifier = aQualifier;
}
/**
* Returns the qualifier that this qualifier negates.
*/
public EOQualifier qualifier()
{
return qualifier;
}
/**
* Evaluates this qualifier for the specified object,
* and returns whether the object is qualified.
* evaluateWithObject is invoked on qualifier
* and the result is negated and returned.
*/
public boolean evaluateWithObject( Object anObject )
{
return !(qualifier.evaluateWithObject(anObject));
}
/**
* Returns a string representation of this qualifier.
*/
public String toString()
{
return (new StringBuffer("Not ").append(qualifier.toString()).toString());
}
public static Object decodeWithKeyValueUnarchiver(EOKeyValueUnarchiver arch) {
EOQualifier q = (EOQualifier)arch.decodeObjectForKey("qualifier");
if (q == null)
return null;
return new EONotQualifier(q);
}
public void encodeWithKeyValueArchiver(EOKeyValueArchiver arch) {
arch.encodeObject("EONotQualifier", "class");
if (qualifier instanceof EOKeyValueArchiving) {
EOKeyValueArchiver ar2 = new EOKeyValueArchiver();
((EOKeyValueArchiving)qualifier).encodeWithKeyValueArchiver(ar2);
arch.encodeObject(ar2.dictionary(), "qualifiers");
} else
throw new WotonomyException("Cannot archive instance of " + qualifier.getClass().getName());
}
}
/*
* $Log$
* Revision 1.2 2006/02/16 16:47:14 cgruber
* Move some classes in to "internal" packages and re-work imports, etc.
*
* Also use UnsupportedOperationExceptions where appropriate, instead of WotonomyExceptions.
*
* Revision 1.1 2006/02/16 13:19:57 cgruber
* Check in all sources in eclipse-friendly maven-enabled packages.
*
* Revision 1.9 2003/08/12 01:43:04 chochos
* formally implement EOQualifierEvaluation
*
* Revision 1.8 2003/08/11 19:39:30 chochos
* special conditions for NSKeyValueCoding.NullValue -> EONull
*
* Revision 1.7 2003/08/09 01:24:19 chochos
* implements EOKeyValueArchiving
*
* Revision 1.6 2003/08/06 23:07:52 chochos
* general code cleanup (mostly, removing unused imports)
*
* Revision 1.5 2001/10/31 15:25:14 mpowers
* Cleanup of qualifiers.
*
* Revision 1.4 2001/10/30 22:57:28 mpowers
* EOQualifier framework is now working.
*
* Revision 1.3 2001/09/13 15:42:20 mpowers
* Fixed another cut/paste typo.
*
* Revision 1.2 2001/09/13 15:41:34 mpowers
* Fixed typo.
*
* Revision 1.1 2001/09/13 15:38:19 mpowers
* Started implementation of the EOQualifier framework.
*
*
*/
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