IndexRowPrefixSelector.java

/**
 * Copyright (C) 2009-2013 FoundationDB, LLC
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.foundationdb.server.api.dml;

// For selecting a prefix of an index row

public class IndexRowPrefixSelector implements ColumnSelector
{
    @Override
    public String toString()
    {
        return String.format("columns(0-%s)", nColumns - 1);
    }

    @Override
    public boolean includesColumn(int columnPosition)
    {
        return columnPosition < nColumns;
    }

    public IndexRowPrefixSelector(int nColumns)
    {
        this.nColumns = nColumns;
    }

    private final int nColumns;
}