datatable.java

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/*
 *  Copyright (c) 2001 Sun Microsystems, Inc.  All rights
 *  reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *
 *  1. Redistributions of source code must retain the above copyright
 *  notice, this list of conditions and the following disclaimer.
 *
 *  2. 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.
 *
 *  3. The end-user documentation included with the redistribution,
 *  if any, must include the following acknowledgment:
 *  "This product includes software developed by the
 *  Sun Microsystems, Inc. for Project JXTA."
 *  Alternately, this acknowledgment may appear in the software itself,
 *  if and wherever such third-party acknowledgments normally appear.
 *
 *  4. The names "Sun", "Sun Microsystems, Inc.", "JXTA" and "Project JXTA"
 *  must not be used to endorse or promote products derived from this
 *  software without prior written permission. For written
 *  permission, please contact Project JXTA at http://www.jxta.org.
 *
 *  5. Products derived from this software may not be called "JXTA",
 *  nor may "JXTA" appear in their name, without prior written
 *  permission of Sun.
 *
 *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 APACHE SOFTWARE FOUNDATION OR
 *  ITS 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.
 *  ====================================================================
 *
 *  This software consists of voluntary contributions made by many
 *  individuals on behalf of Project JXTA.  For more
 *  information on Project JXTA, please see
 *  <http://www.jxta.org/>.
 *
 *  This license is based on the BSD license adopted by the Apache Foundation.
 *
 *  $Id: DataTable.java,v 1.1 2006/06/13 07:02:30 nano Exp $
 */

package net.jxta.myjxta.misc.beam;
//package net.java.netbeams.store;

import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Properties;

public class DataTable {

    private int rows = 0;
    private int cols = 0;
    private Hashtable table = null;

    /**
     * Constructor - requires
     */
    public DataTable(Hashtable table) {
        this.table = table;
        if (table != null) {
            Enumeration keys = table.keys();
            cols = 0;
            String heading = null;
            while (keys.hasMoreElements()) {
                heading = (String) keys.nextElement();
                cols++;
            }
            rows = ((String[]) table.get(heading)).length;
        }
    }

    /**
     * Method to return the number of rows in the DataTable
     */
    public int getNumberOfRows() {
        return rows;
    }

    /**
     * Method to return the number of columns in the DataTable
     */
    public int getNumberOfColumns() {
        return cols;
    }

    /**
     * Method to return a String array representing the a column of data
     *
     * @param columnheading name of column to retrieve.
     */
    public String[] getColumn(String columnheading) {
        return (String[]) table.get(columnheading);
    }

    /**
     * Method to return a java.util.Properties representing an unordered
     * collection of data in a row with named keys.
     *
     * @param row the integer row to retrieve.
     */
    public Properties getRow(int row) {
        Enumeration e = table.keys();
        Properties p = null;
        while (e.hasMoreElements()) {
            if (p == null) p = new Properties();
            String heading = (String) e.nextElement();
            String[] values = getColumn(heading);
            p.setProperty(heading, values[row]);
        }
        return p;
    }
}