Package org.openquark.cal.internal.machine.g.functions

Source Code of org.openquark.cal.internal.machine.g.functions.NOrdinalValue

/*
* Copyright (c) 2007 BUSINESS OBJECTS SOFTWARE LIMITED
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
*     * Redistributions of source code must retain the above copyright notice,
*       this list of conditions and the following disclaimer.
*     * Redistributions in binary form must reproduce the above copyright
*       notice, this list of conditions and the following disclaimer in the
*       documentation and/or other materials provided with the distribution.
*     * Neither the name of Business Objects nor the names of its contributors
*       may be used to endorse or promote products derived from this software
*       without specific prior written permission.
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/


/*
* NOrdinalValue.java
* Created: July 28, 2005
* By: Raymond Cypher
*/
package org.openquark.cal.internal.machine.g.functions;

import org.openquark.cal.compiler.QualifiedName;
import org.openquark.cal.internal.machine.g.Executor;
import org.openquark.cal.internal.machine.g.NPrimitiveFunc;
import org.openquark.cal.internal.machine.g.NValInt;
import org.openquark.cal.internal.machine.g.Node;
import org.openquark.cal.internal.module.Cal.Core.CAL_Prelude_internal;
import org.openquark.cal.runtime.CALExecutorException;


/**
* Implementation of the primitive function Prelude.ordinalValue.
*/
public class NOrdinalValue extends NPrimitiveFunc {

    public static final NOrdinalValue instance = new NOrdinalValue();
    public static final QualifiedName name = CAL_Prelude_internal.Functions.ordinalValue;
   
    private NOrdinalValue () {/* constructor made private for singleton */ }
       
    @Override
    protected int getArity () {
        return 1;
    }
  
    @Override
    protected QualifiedName getName () {
        return name;
    }

    /**
     * Evaluate the argument and get the ordinal value.
     */
    @Override
    public Node doEvaluation (Node[] arguments, Executor executor)
            throws CALExecutorException {
       
        // Evaluate the argument and call getOrdinalValue.
        return new NValInt (executor.internalEvaluate(arguments[0]).getOrdinalValue());
    }


}
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