/* ====================================================================
   Licensed to the Apache Software Foundation (ASF) under one or more
   contributor license agreements.  See the NOTICE file distributed with
   this work for additional information regarding copyright ownership.
   The ASF licenses this file to You under the Apache License, Version 2.0
   (the "License"); you may not use this file except in compliance with
   the License.  You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
==================================================================== */

package org.apache.poi.hssf.record.formula;

import org.apache.poi.hssf.model.Workbook;
import org.apache.poi.hssf.record.RecordInputStream;

/**
 * Ptg class to implement not equal
 *
 * @author fred at stsci dot edu
 */
public class NotEqualPtg
        extends OperationPtg
{
    public final static int SIZE = 1;
    public final static byte sid = 0x0e;

    /**
     * Creates new NotEqualPtg
     */
    public NotEqualPtg()
    {
    }

    public NotEqualPtg( RecordInputStream in )
    {
        // doesn't need anything
    }

    public void writeBytes( byte[] array, int offset )
    {
        array[offset + 0] = sid;
    }

    public int getSize()
    {
        return SIZE;
    }

    public int getType()
    {
        return TYPE_BINARY;
    }

    public int getNumberOfOperands()
    {
        return 2;
    }

    public String toFormulaString( Workbook book )
    {
        return "<>";
    }

    public String toFormulaString( String[] operands )
    {
        StringBuffer buffer = new StringBuffer();

        buffer.append( operands[0] );

        buffer.append( toFormulaString( (Workbook) null ) );
        buffer.append( operands[1] );

        return buffer.toString();
    }

    public Object clone()
    {
        return new NotEqualPtg();
    }

}