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Statistical sampling library for use in virtualdataset libraries, based on apache commons math 4

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/**
 * Logback: the reliable, generic, fast and flexible logging framework.
 * Copyright (C) 1999-2015, QOS.ch. All rights reserved.
 *
 * This program and the accompanying materials are dual-licensed under
 * either the terms of the Eclipse Public License v1.0 as published by
 * the Eclipse Foundation
 *
 *   or (per the licensee's choosing)
 *
 * under the terms of the GNU Lesser General Public License version 2.1
 * as published by the Free Software Foundation.
 */
package ch.qos.logback.classic.spi;

import java.io.Serializable;
import java.util.Map;

import ch.qos.logback.classic.LoggerContext;

/**
 * LoggerContextVO offers a restricted view of LoggerContext intended to be
 * exposed by LoggingEvent to remote systems. This restricted view is optimized
 * for serialization.
 * 
 * 
 * Some of the LoggerContext or Logger attributes MUST not survive
 * serialization, e.g appenders, level values etc, as these attributes may have
 * other values on the remote platform. LoggerContextVO class exposes the
 * minimal and relevant attributes to the remote host, instead of having to deal
 * with an incomplete LoggerContext with many null references.
 * 
 * @author Ceki Gülcü
 * @author Sébastien Pennec
 */
public class LoggerContextVO implements Serializable {

    private static final long serialVersionUID = 5488023392483144387L;

    final String name;
    final Map propertyMap;
    final long birthTime;

    public LoggerContextVO(LoggerContext lc) {
        this.name = lc.getName();
        this.propertyMap = lc.getCopyOfPropertyMap();
        this.birthTime = lc.getBirthTime();
    }

    public LoggerContextVO(String name, Map propertyMap, long birthTime) {
        this.name = name;
        this.propertyMap = propertyMap;
        this.birthTime = birthTime;
    }

    public String getName() {
        return name;
    }

    public Map getPropertyMap() {
        return propertyMap;
    }

    public long getBirthTime() {
        return birthTime;
    }

    @Override
    public String toString() {
        return "LoggerContextVO{" + "name='" + name + '\'' + ", propertyMap=" + propertyMap + ", birthTime=" + birthTime + '}';
    }

    @Override
    public boolean equals(Object o) {
        if (this == o)
            return true;
        if (!(o instanceof LoggerContextVO))
            return false;

        LoggerContextVO that = (LoggerContextVO) o;

        if (birthTime != that.birthTime)
            return false;
        if (name != null ? !name.equals(that.name) : that.name != null)
            return false;
        if (propertyMap != null ? !propertyMap.equals(that.propertyMap) : that.propertyMap != null)
            return false;

        return true;
    }

    @Override
    public int hashCode() {
        int result = name != null ? name.hashCode() : 0;
        result = 31 * result + (propertyMap != null ? propertyMap.hashCode() : 0);
        result = 31 * result + (int) (birthTime ^ (birthTime >>> 32));

        return result;
    }
}