stack.java

jrobin,使用纯java实现的RRD数据库,使用RRD数据库来统计数据.

/* ============================================================
 * JRobin : Pure java implementation of RRDTool's functionality
 * ============================================================
 *
 * Project Info:  http://www.jrobin.org
 * Project Lead:  Sasa Markovic ([e-mail])
 *
 * Developers:    Sasa Markovic ([e-mail])
 *
 *
 * (C) Copyright 2003-2005, by Sasa Markovic.
 *
 * 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.
 */
package org.jrobin.graph;

import org.jrobin.core.RrdException;
import org.jrobin.data.DataProcessor;

import java.awt.*;

class Stack extends SourcedPlotElement {
	private final SourcedPlotElement parent;

	Stack(SourcedPlotElement parent, String srcName, Paint color) {
		super(srcName, color);
		this.parent = parent;
	}

	void assignValues(DataProcessor dproc) throws RrdException {
		double[] parentValues = parent.getValues();
		double[] procValues = dproc.getValues(srcName);
		values = new double[procValues.length];
		for (int i = 0; i < values.length; i++) {
			values[i] = parentValues[i] + procValues[i];
		}
	}

	float getParentLineWidth() {
		if (parent instanceof Line) {
			return ((Line) parent).width;
		}
		else if (parent instanceof Area) {
			return -1F;
		}
		else /* if(parent instanceof Stack) */ {
			return ((Stack) parent).getParentLineWidth();
		}
	}

	Paint getParentColor() {
		return parent.color;
	}
}