/*
* Copyright (C) 2000 - 2008 TagServlet Ltd
*
* This file is part of Open BlueDragon (OpenBD) CFML Server Engine.
*
* OpenBD is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* Free Software Foundation,version 3.
*
* OpenBD 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 OpenBD. If not, see http://www.gnu.org/licenses/
*
* Additional permission under GNU GPL version 3 section 7
*
* If you modify this Program, or any covered work, by linking or combining
* it with any of the JARS listed in the README.txt (or a modified version of
* (that library), containing parts covered by the terms of that JAR, the
* licensors of this Program grant you additional permission to convey the
* resulting work.
* README.txt @ http://www.openbluedragon.org/license/README.txt
*
* http://www.openbluedragon.org/
*/
package com.naryx.tagfusion.cfm.queryofqueries;
/**
* This class represents a comparison condition.
* - expression ( <= | >= | != | = | < | > ) expression
*/
import java.util.List;
import java.util.Map;
import com.naryx.tagfusion.cfm.engine.cfData;
import com.naryx.tagfusion.cfm.engine.cfmRunTimeException;
class comparisonCondition extends condition{
expression expr1, expr2;
int operator;
comparisonCondition( expression _expr, expression _expr2, Token _op ){
expr1 = _expr;
expr2 = _expr2;
operator = _op.kind;
}// comparisonCondition()
boolean evaluate( rowContext _rowContext, List<cfData> _pData ) throws cfmRunTimeException{
cfData val1 = expr1.evaluate( _rowContext, _pData );
cfData val2 = expr2.evaluate( _rowContext, _pData );
return compareResult( val1, val2 );
}// evaluate()
boolean evaluate( ResultRow _row, List<cfData> _pData, Map<String, Integer> _indxLookup ) throws cfmRunTimeException {
cfData val1 = expr1.evaluate( _row, _pData, _indxLookup );
cfData val2 = expr2.evaluate( _row, _pData, _indxLookup );
return compareResult( val1, val2 );
}
private boolean compareResult( cfData _val1, cfData _val2 ) throws cfmRunTimeException{
int compareResult = cfData.compare( _val1, _val2 );
switch ( operator ){
case selectSQLParserConstants.LTE:
return compareResult <= 0;
case selectSQLParserConstants.LT:
return compareResult < 0;
case selectSQLParserConstants.GTE:
return compareResult >= 0;
case selectSQLParserConstants.GT:
return compareResult > 0;
case selectSQLParserConstants.NEQ:
case selectSQLParserConstants.NEQ2:
return compareResult != 0;
case selectSQLParserConstants.EQ:
return compareResult == 0;
default:
throw new cfmRunTimeException(); // won't happen
}
}
}// comparisonCondition