D-Net

package eu.dnetlib.utils;

import java.io.IOException;

import java.util.Properties;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

import org.apache.log4j.Logger;

import eu.dnetlib.domain.ServiceIdentity;

public class ServiceIdentityFactory {

	private static Logger logger = Logger.getLogger(ServiceIdentityFactory.class);

	/**

	 * Reads a properties file with the name <serviceName>.properties from the

	 * classpath and returns a ServiceIdentity object that describes a service's

	 * version.

	 * @param serviceName the serviceName

	 * @return the service version.

	 */

	public static ServiceIdentity createIdentity(String serviceName) {

		try {

			Properties properties = new Properties();

			properties.load(ServiceIdentityFactory.class.getClassLoader()

					.getResourceAsStream(serviceName + ".properties"));

			String name = properties.getProperty("name");

			String label = properties.getProperty("label");

			String version[] = properties.getProperty("version").split("\\.");

			String major = version.length > 0?version[0]:null;

			String minor = version.length > 1?version[1]:null;

			String micro = version.length > 2?version[2]:null;

			return new ServiceIdentity(name, major, minor, micro, label);

		} catch (IOException e) {

			logger.error("Error creating service identity", e);

			return null;

		}

	}

	/**

	 * Parse a service version. Version syntax:

	 * ${NAME}-${MAJOR}.${MINOR}.${MICRO}[-${LABEL}]

	 * @param identity The string representation

	 * @return the ServiceIdentity object

	 */

	public static ServiceIdentity parseIdentity(String identity) {

		Pattern p = Pattern.compile("(.+)-(\\d)\\.(\\d)\\.(\\d)(-(.*))?");	

		Matcher m = p.matcher(identity);

		if (m.find()) {

			String name = m.group(1);

			String major = m.group(2);

			String minor = m.group(3);

			String micro = m.group(4);

			String label = m.group(6);

			return new ServiceIdentity(name, major, minor, micro, label);

		} else {

			return null;

		}

	}

}