ServiceUtils.java

package org.societies.api.services;

import java.net.URI;
import java.net.URISyntaxException;

import org.societies.api.schema.servicelifecycle.model.ServiceResourceIdentifier;


/**
 * Collection of utility methods.
 *
 * @author <a href="mailto:sanchocsa@gmail.com">Sancho Rêgo</a> (PTIN)
 *
 */
public class ServiceUtils {


	public static ServiceResourceIdentifier generateServiceResourceIdentifierFromString(String serviceId){
		
		if(serviceId == null)
			return null;
		
		ServiceResourceIdentifier result = new ServiceResourceIdentifier();
		
		int index = serviceId.indexOf(' ');	
		String instanceExtract = serviceId.substring(0, index);
		String identifierExtract = serviceId.substring(index+1);
				
		result.setServiceInstanceIdentifier(instanceExtract);
		try {
			result.setIdentifier(new URI(identifierExtract));
		} catch (URISyntaxException e1) {
			e1.printStackTrace();
			return null;
		}
		
		return result;
	}
	
	public static String serviceResourceIdentifierToString(ServiceResourceIdentifier serviceId){
		
		if(serviceId == null)
			return null;
		
		StringBuilder builder = new StringBuilder();
		builder.append(serviceId.getServiceInstanceIdentifier()).append(' ').append(serviceId.getIdentifier().toString());
		return builder.toString();
	}
	
	/**
	 *  This method compares to ServiceResourceIdentifiers to determine if they are equal. It is, effectively, an "equals" method
	 *  as the ServiceResourceIdentifier does not have one, since it is a bean.
	 *  
	 * @param serviceId
	 * @param otherServiceId
	 * @return true if they are equal, false otherwise.
	 */
	public static boolean compare(ServiceResourceIdentifier serviceId, ServiceResourceIdentifier otherServiceId){
		
		if(serviceId == null || otherServiceId == null)
			return false;
		
		if(serviceId.getIdentifier().equals(otherServiceId.getIdentifier()) && serviceId.getServiceInstanceIdentifier().equals(otherServiceId.getServiceInstanceIdentifier()))
			return true;
		else
			return false;
			
	}
	
	
	/**
	 * This method returns the Jid of the node where the service exists
	 * 
	 * @param serviceId
	 * @return the requested Jid
	 */
	public static String getJidFromServiceIdentifier(ServiceResourceIdentifier serviceId){
		
		String identifier = serviceId.getIdentifier().toString();
		int lastIndex = identifier.lastIndexOf('/');
		return identifier.substring(0, lastIndex);
	}
	
}