commenttext.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;

class CommentText implements RrdGraphConstants {
	private final String text;		// original text

	String resolvedText;	// resolved text
	String marker; // end-of-text marker
	boolean enabled; // hrule and vrule comments can be disabled at runtime
	int x, y; // coordinates, evaluated later

	CommentText(String text) {
		this.text = text;
	}

	void resolveText(DataProcessor dproc, ValueScaler valueScaler) throws RrdException {
		resolvedText = text;
		marker = "";
		if (resolvedText != null) {
			for (String mark : MARKERS) {
				if (resolvedText.endsWith(mark)) {
					marker = mark;
					resolvedText = resolvedText.substring(0, resolvedText.length() - marker.length());
					trimIfGlue();
					break;
				}
			}
		}
		enabled = resolvedText != null;
	}


	void trimIfGlue() {
		if (marker.equals(GLUE_MARKER)) {
			resolvedText = resolvedText.trim();
		}
	}

	boolean isPrint() {
		return false;
	}

	boolean isValidGraphElement() {
		return !isPrint() && enabled;
	}
}