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Library for managing configuration of CIAO CIPs

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/*
   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

     http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/
package uk.nhs.ciao.configuration;

import java.util.Properties;

import uk.nhs.ciao.exceptions.CIAOConfigurationException;
import joptsimple.OptionParser;
import joptsimple.OptionSet;

/**
 * This class handles the parsing of command line parameters for initialising config path or location.
 * @author Adam Hatherly
 *
 */
public class CommandLineParser {
	private static String ETCDURLPARAM = "etcdURL";
	private static String CONFIGPATHPARAM = "configPath";
	private static String CLASSIFIERPARAM = "classifier";
	
	
	protected static void initialiseFromCLIArguments(CIAOConfig config,
					String args[], String cipName, String version, Properties defaultConfig) throws CIAOConfigurationException {
		// --etcdURL=http://127.0.0.1:4001
		// --configPath=/etc/ciao
		// --classifier=uat_cluster
		OptionParser parser = new OptionParser();
        parser.accepts( ETCDURLPARAM ).withRequiredArg();
        parser.accepts( CONFIGPATHPARAM ).withRequiredArg();
        parser.accepts( CLASSIFIERPARAM ).withRequiredArg();
        parser.allowsUnrecognizedOptions();
        OptionSet options = parser.parse( args );
        
        String etcdURL = null;
        String configFilePath = null;
        String classifier = null;
        
        if (options.has( ETCDURLPARAM )) {
        	etcdURL = options.valueOf(ETCDURLPARAM).toString();
        }
        if (options.has( CONFIGPATHPARAM )) {
        	configFilePath = options.valueOf(CONFIGPATHPARAM).toString();
        }
        if (options.has( CLASSIFIERPARAM )) {
        	classifier = options.valueOf(CLASSIFIERPARAM).toString();
        }
        
        config.initialise(etcdURL, configFilePath, cipName, version, defaultConfig, classifier);
	}
}