CharafeddineMechalikh/PureEdgeSim

/**
 *     PureEdgeSim:  A Simulation Framework for Performance Evaluation of Cloud, Edge and Mist Computing Environments 
 *
 *     This file is part of PureEdgeSim Project.
 *
 *     PureEdgeSim is free software: you can redistribute it and/or modify
 *     it under the terms of the GNU General Public License as published by
 *     the Free Software Foundation, either version 3 of the License, or
 *     (at your option) any later version.
 *
 *     PureEdgeSim 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 General Public License for more details.
 *
 *     You should have received a copy of the GNU General Public License
 *     along with PureEdgeSim. If not, see <http://www.gnu.org/licenses/>.
 *     
 *     @author Charafeddine Mechalikh
 **/
package com.mechalikh.pureedgesim.energy;


/**
 * A class that implements the Null Object Design Pattern for the
 * {@link EnergyModelComputingNode} class. Needed to avoid
 * {@link NullPointerException} when using the NULL object instead of
 * attributing null to EnergyModelComputingNode variables.
 */
public class EnergyModelComputingNodeNull extends EnergyModelComputingNode {

    /**
     * 
     * Represents a null energy model, used as a placeholder when a energy model
     * is expected but none is available or applicable.
     */
    private static final EnergyModelComputingNodeNull instance = new EnergyModelComputingNodeNull();
    

    /**
     * Returns the singleton instance of the ComputingNodeNullObject.
     * 
     * @return the singleton instance of the ComputingNodeNullObject
     */
    public static EnergyModelComputingNodeNull getInstance() {
        return instance;
    }
    
    /**
     * 
     * Private constructor to prevent instantiation from outside the class.
     */
    private EnergyModelComputingNodeNull() {
        super(0, 0);
    }

    @Override
    public double getTotalEnergyConsumption() {
        return 0;
    }

    @Override
    public double getMaxActiveConsumption() {
        return 0;
    }

    @Override
    public double getIdleConsumption() {
        return 0;
    }

    @Override
    public double getBatteryCapacity() {
        return 0;
    }

    @Override
    public double getBatteryLevelWattHour() {
        return 0;
    }

    @Override
    public double getBatteryLevelPercentage() {
        return 0;
    }

    @Override
    public boolean isBatteryPowered() {
        return false;
    }

    @Override
    public String getConnectivityType() {
        return "";
    }

    

}