package org.fog.placement;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class ModuleMapping {
	/**
	 * Mapping from node name to list of <moduleName, numInstances> of instances to be launched on node
	 */
	protected Map<String, List<String>> moduleMapping;
	
	public static ModuleMapping createModuleMapping(){
		return new ModuleMapping();
	}

	public Map<String, List<String>> getModuleMapping() {
		return moduleMapping;
	}
	
	public void setModuleMapping(Map<String, List<String>> moduleMapping) {
		this.moduleMapping = moduleMapping;
	}

	protected ModuleMapping(){
		setModuleMapping(new HashMap<String, List<String>>());
	}
	
	/**
	 * Add <b>instanceCount</b> number of instances of module <b>moduleName</b> to <b>device deviceName</b>
	 * @param moduleName
	 * @param deviceName
	 * @param instanceCount
	 */
	public void addModuleToDevice(String moduleName, String deviceName){
		if(!getModuleMapping().containsKey(deviceName))
			getModuleMapping().put(deviceName, new ArrayList<String>());
		if(!getModuleMapping().get(deviceName).contains(moduleName))
			getModuleMapping().get(deviceName).add(moduleName);
	}
	
}