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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 java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import net.wotonomy.foundation.NSArray;
import net.wotonomy.foundation.NSDictionary;
import net.wotonomy.foundation.NSMutableArray;
import net.wotonomy.foundation.internal.WotonomyException;
/**
* EOAndQualifier contains other EOQualifiers,
* evaluating as true only if all of the contained
* qualifiers evaluate as true.
*
* @author michael@mpowers.net
* @author yjcheung@intersectsoft.com
* @author $Author: cgruber $
* @version $Revision: 894 $
*/
public class EOAndQualifier extends EOQualifier
implements EOKeyValueArchiving, EOQualifierEvaluation
{
private List qualifiers;
public EOAndQualifier(
List aQualifierList )
{
qualifiers = new LinkedList( aQualifierList );
}
/**
* Returns a List of qualifiers contained by this qualifier.
*/
public NSArray qualifiers()
{
return new NSArray( qualifiers );
}
/**
* Add a new qualifier to the list.
*/
public void addQualifier(EOQualifier qualifier)
{
qualifiers.add(qualifier);
}
/**
* Evaluates this qualifier for the specified object,
* and returns whether the object is qualified.
* selector() is invoked on the value for key() on the
* specified object, with value() as the parameter.
*
* Note: this has the lazy "and" implementation. Ex.
* Qal1 and Qal2. If the Qal1 is evaluated to be false, then it returns
* false without evaluating Qa12.
*/
public boolean evaluateWithObject( Object anObject )
{
boolean retVal = true;
Iterator it = qualifiers.iterator();
while (it.hasNext() && retVal)
{
retVal = ((EOQualifier) it.next()).evaluateWithObject(anObject);
}
return retVal;
}
/**
* Returns a string representation of this qualifier.
*/
public String toString()
{
StringBuffer myBuf = new StringBuffer("(");
Iterator it = qualifiers.iterator();
while (it.hasNext())
{
myBuf = myBuf.append(((EOQualifier) it.next()).toString()).append(" and ");
}
String myStr = myBuf.toString();
myStr = myStr.substring(0, myStr.lastIndexOf(" and")).concat(")");
return myStr;
}
public static Object decodeWithKeyValueUnarchiver(EOKeyValueUnarchiver arch) {
NSArray a = (NSArray)arch.decodeObjectForKey("qualifiers");
if (a == null)
return null;
NSMutableArray l = new NSMutableArray();
for (int i = 0; i < a.count(); i++) {
NSDictionary d = (NSDictionary)a.objectAtIndex(i);
EOKeyValueUnarchiver ua = new EOKeyValueUnarchiver(d);
EOQualifier q = (EOQualifier)EOQualifier.decodeWithKeyValueUnarchiver(ua);
if (q != null)
l.addObject(q);
}
return new EOAndQualifier(l);
}
public void encodeWithKeyValueArchiver(EOKeyValueArchiver arch) {
arch.encodeObject("EOAndQualifier", "class");
NSMutableArray arr = new NSMutableArray(qualifiers.size());
for (int i = 0; i < qualifiers.size(); i++) {
EOQualifier q = (EOQualifier)qualifiers.get(i);
if (q instanceof EOKeyValueArchiving) {
EOKeyValueArchiver ar2 = new EOKeyValueArchiver();
((EOKeyValueArchiving)q).encodeWithKeyValueArchiver(ar2);
arr.addObject(ar2.dictionary());
} else
throw new WotonomyException("Cannot archive instance of " + q.getClass().getName());
}
arch.encodeObject(arr, "qualifiers");
}
}
/*
* $Log$
* 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 1.6 2003/08/12 01:43:04 chochos
* formally implement EOQualifierEvaluation
*
* Revision 1.5 2003/08/09 01:22:51 chochos
* qualifiers implement EOKeyValueArchiving
*
* Revision 1.4 2003/08/06 23:07:52 chochos
* general code cleanup (mostly, removing unused imports)
*
* Revision 1.3 2001/10/31 15:25:14 mpowers
* Cleanup of qualifiers.
*
* Revision 1.2 2001/10/30 22:57:28 mpowers
* EOQualifier framework is now working.
*
* Revision 1.1 2001/09/13 15:25:56 mpowers
* Started implementation of the EOQualifier framework.
*
*
*/
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