/***************************************************************************
* Copyright 2009 (C) by Fabrizio Montesi *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU Library General Public License as *
* published by the Free Software Foundation; either version 2 of the *
* License, or (at your option) any later version. *
* *
* This program 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 Library General Public *
* License along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
* *
* For details about the authors of this software, see the AUTHORS file. *
***************************************************************************/
package jolie.runtime;
/**
* A CompareOperator performs some kind of boolean comparison between two values.
* @author Fabrizio Montesi
*/
public enum CompareOperator
{
EQUAL {
public final boolean evaluate( Value left, Value right ) {
return left.equals( right );
}
}, NOT_EQUAL {
public final boolean evaluate( Value left, Value right ) {
return EQUAL.evaluate( left, right ) == false;
}
}, MINOR {
public final boolean evaluate( Value left, Value right ) {
if ( left.isDouble() ) {
return ( left.doubleValue() < right.doubleValue() );
} else {
return ( left.intValue() < right.intValue() );
}
}
}, MAJOR {
public final boolean evaluate( Value left, Value right ) {
if ( left.isDouble() ) {
return ( left.doubleValue() > right.doubleValue() );
} else {
return ( left.intValue() > right.intValue() );
}
}
}, MINOR_OR_EQUAL {
public final boolean evaluate( Value left, Value right ) {
if ( left.isDouble() ) {
return ( left.doubleValue() <= right.doubleValue() );
} else {
return ( left.intValue() <= right.intValue() );
}
}
}, MAJOR_OR_EQUAL {
public final boolean evaluate( Value left, Value right ) {
if ( left.isDouble() ) {
return ( left.doubleValue() >= right.doubleValue() );
} else {
return ( left.intValue() >= right.intValue() );
}
}
};
public abstract boolean evaluate( Value left, Value right );
}