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com.hfg xml, html, svg, and bioinformatics utility library

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package com.hfg.sql.table;

import java.util.Comparator;

import com.hfg.util.CompareUtil;

//------------------------------------------------------------------------------
/**
 Simple DatabaseRow Comparator that uses the id column.
 
 @author J. Alex Taylor, hairyfatguy.com
 
 */
//------------------------------------------------------------------------------
// com.hfg XML/HTML Coding Library
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//
// J. Alex Taylor, President, Founder, CEO, COO, CFO, OOPS hairyfatguy.com
// [email protected]
//------------------------------------------------------------------------------

public class DatabaseRowIdComparator implements Comparator
{
    //---------------------------------------------------------------------------
    @Override
    public int compare(DatabaseRow inRow1, DatabaseRow inRow2)
    {
        int result = -1;

        // Compare qualified tablenames
        result = CompareUtil.compare(inRow1.getDatabaseTable().getQualifiedName(), inRow2.getDatabaseTable().getQualifiedName());
        if (0 == result)
        {
            // Rows are from the same table. Compare row ids if the table has an id column
            DatabaseCol idCol = inRow1.getIdCol();
            if (idCol != null)
            {
                // Compare row ids
                result = CompareUtil.compareValues(inRow1.getField(idCol).getValue(), inRow2.getField(idCol).getValue());
            }
        }

        return result;
    }
}