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package org.openecomp.sdc.asdctool.cli;
import org.apache.commons.cli.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* abstract base class to extend when implementing a cli tool
*/
public abstract class CLITool {
private static final Logger LOGGER = LoggerFactory.getLogger(CLITool.class);
public CLIToolData init(String[] args) {
CommandLine commandLine = initCmdLineOptions(args);
return new CLIToolData(commandLine);
}
private CommandLine initCmdLineOptions(String[] args) {
Options options = buildCmdLineOptions();
CommandLineParser parser = new DefaultParser();
try {
return parser.parse( options, args );
}
catch( ParseException exp ) {
LOGGER.error("Parsing failed. Reason: " + exp.getMessage() );
usageAndExit(options);
return null;
}
}
private void usageAndExit(Options options) {
HelpFormatter formatter = new HelpFormatter();
formatter.printHelp(commandName(), options );
System.exit(1);
}
/**
*
* @return all command line options required by this command line tool
*/
protected abstract Options buildCmdLineOptions();
/**
*
* @return the command name
*/
protected abstract String commandName();
}
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