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5827 amar.kumar 1 
/*
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 *	Copyright 2005 stat4j.org
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 *
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 *   Licensed under the Apache License, Version 2.0 (the "License");
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 *   you may not use this file except in compliance with the License.
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 *	You may obtain a copy of the License at
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 *
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 *       http://www.apache.org/licenses/LICENSE-2.0
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 *
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 *   Unless required by applicable law or agreed to in writing, software
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 *   distributed under the License is distributed on an "AS IS" BASIS,
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 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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 *   See the License for the specific language governing permissions and
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 *   limitations under the License.
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 */
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package net.sourceforge.stat4j;
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import java.io.Serializable;
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/**
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 * Name:		Reading.java
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 * Date:		Aug 29, 2004
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 * Description:
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 *
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 * A reading captured from the log at a point in time.
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 *
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 * The reading value is derived from the log message itself
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 * using a scrap expression. If no scrap expression is supplied
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 * the value defaults to 1.0.
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 *
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 *
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 * @author Lara D'Abreo
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 */
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public class Reading implements Serializable{
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	protected	long	timestamp;
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	protected	long	freeMemory;
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	protected	double	value;
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	public Reading() {
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		this.timestamp = System.currentTimeMillis();
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		this.freeMemory = Runtime.getRuntime().freeMemory();
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		this.value = 1.0;
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	}
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	public Reading(double value) {
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		this();
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		this.value = value;
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	}
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	public double getReading(Unit unit) {
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		if (unit == Unit.MEMORY) {
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			return freeMemory;
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		}else if (unit == Unit.TIME) {
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			return timestamp;
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		}else {
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			return value;
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		}
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	}
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	/**
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	 * @return
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	 */
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	public long getFreeMemory() {
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		return freeMemory;
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	}
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	/**
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	 * @return
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	 */
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	public long getTimestamp() {
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		return timestamp;
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	}
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	/**
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	 * @return
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	 */
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	public double getValue() {
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		return value;
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	}
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}