/* This file is part of the db4o object database http://www.db4o.com
Copyright (C) 2004 - 2011 Versant Corporation http://www.versant.com
db4o is free software; you can redistribute it and/or modify it under
the terms of version 3 of the GNU General Public License as published
by the Free Software Foundation.
db4o 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 General Public License
for more details.
You should have received a copy of the GNU General Public License along
with this program. If not, see http://www.gnu.org/licenses/. */
package com.db4o.internal.query.processor;
import com.db4o.internal.*;
import com.db4o.internal.handlers.*;
/**
* @exclude
*/
public abstract class QEStringCmp extends QEAbstract {
@decaf.Public
private boolean caseSensitive;
/** for C/S messaging only */
public QEStringCmp() {
}
public QEStringCmp(boolean caseSensitive_) {
caseSensitive = caseSensitive_;
}
boolean evaluate(QConObject constraint, InternalCandidate candidate, Object obj){
if(obj != null){
if(obj instanceof ByteArrayBuffer) {
obj = StringHandler.readString(candidate.transaction().context(), (ByteArrayBuffer)obj);
}
String candidateStringValue = obj.toString();
String stringConstraint = constraint.getObject().toString();
if(!caseSensitive) {
candidateStringValue=candidateStringValue.toLowerCase();
stringConstraint=stringConstraint.toLowerCase();
}
return compareStrings(candidateStringValue,stringConstraint);
}
return constraint.getObject()==null;
}
public boolean supportsIndex(){
return false;
}
protected abstract boolean compareStrings(String candidate,String constraint);
}