/*
	StatCvs - CVS statistics generation 
	Copyright (C) 2002  Lukasz Pekacki <lukasz@pekacki.de>
	http://statcvs.sf.net/
    
	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
    
	$RCSfile: IntegerColumn.java,v $
	$Date: 2003/04/19 13:16:22 $
*/
package net.sf.statcvs.reportmodel;

import java.util.ArrayList;
import java.util.List;

import net.sf.statcvs.renderer.TableCellRenderer;

/**
 * A column of integer values. The column's total is the sum of all values. 
 * 
 * @author Richard Cyganiak <rcyg@gmx.de>
 * @version $Id: IntegerColumn.java,v 1.1 2003/04/19 13:16:22 cyganiak Exp $
 */
public class IntegerColumn extends Column {

	private String title;
	private List values = new ArrayList();
	private int sum = 0;
	private boolean showValues = true;
	private boolean showPercentages = true;

	/**
	 * Creates a new <tt>SimpleTextColumn</tt> with the given head
	 * @param title the head of the column
	 */
	public IntegerColumn(String title) {
		this.title = title;
	}

	/**
	 * Set if the actual integer values should be shown
	 * @param enable show values?
	 */
	public void setShowValues(boolean enable) {
		showValues = enable;
	}

	/**
	 * Set if the values should be shown as percentages
	 * @param enable show percentages?
	 */
	public void setShowPercentages(boolean enable) {
		showPercentages = enable;
	}

	/**
	 * Adds a value to this column (in a new row)
	 * @param value the new value
	 */
	public void addValue(int value) {
		values.add(new Integer(value));
		sum += value;
	}

	/**
	 * Returns a value in the column
	 * @param rowIndex the row to get, starting at 0
	 * @return the value of this row
	 */
	public int getValue(int rowIndex) {
		return ((Integer) values.get(rowIndex)).intValue();
	}

	/**
	 * Returns the sum of all values in the column
	 * @return sum
	 */
	public int getSum() {
		return sum;
	}

	/**
	 * Sets the sum of the column. Useful if, for example, the
	 * column contains only the top 10 values of more values, but
	 * the column total should reflect all values.
	 * @param sum the column's total
	 */
	public void setSum(int sum) {
		this.sum = sum;
	}

	/**
	 * @see net.sf.statcvs.reportmodel.Column#getRows()
	 */
	public int getRows() {
		return values.size();
	}

	/**
	 * @see net.sf.statcvs.reportmodel.Column#renderHead(net.sf.statcvs.renderer.TableCellRenderer)
	 */
	public void renderHead(TableCellRenderer renderer) {
		renderer.renderCell(title);
	}

	/**
	 * @see net.sf.statcvs.reportmodel.Column#renderCell
	 */
	public void renderCell(int rowIndex, TableCellRenderer renderer) {
		callRenderer(renderer, getValue(rowIndex));
	}

	/**
	 * @see net.sf.statcvs.reportmodel.Column#renderTotal(net.sf.statcvs.renderer.TableCellRenderer)
	 */
	public void renderTotal(TableCellRenderer renderer) {
		callRenderer(renderer, sum);
	}
	
	private void callRenderer(TableCellRenderer renderer, int value) {
		if (showValues && showPercentages) {
			renderer.renderIntegerCell(value, sum);
		} else if (showValues) {
			renderer.renderIntegerCell(value);
		} else if (showPercentages) {
			renderer.renderPercentageCell((double) value / (double) sum);
		} else {
			renderer.renderEmptyCell();
		}
	}
}