/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 list;
import java.io.File;
import java.util.Collection;
import java.util.Iterator;
import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.CommandLineParser;
import org.apache.commons.cli.GnuParser;
import org.apache.commons.cli.HelpFormatter;
import org.apache.commons.cli.Option;
import org.apache.commons.cli.OptionBuilder;
import org.apache.commons.cli.Options;
import org.apache.commons.cli.ParseException;
public class Main {
private static Options getOptions() {
Option dir = OptionBuilder.withArgName( "dir" )
.hasArg()
.withDescription( "list files in given dir" )
.create( "dir" );
Options options = new Options();
options.addOption(dir);
return options;
}
public static void main(String[] args) throws Exception {
Options options = getOptions();
try {
CommandLineParser parser = new GnuParser();
CommandLine line = parser.parse( options, args );
File dir = new File(line.getOptionValue("dir", "."));
Collection files = ListFile.list(dir);
System.out.println("listing files in "+dir);
for (Iterator it = files.iterator(); it.hasNext(); ) {
System.out.println("\t"+it.next()+"\n");
}
} catch( ParseException exp ) {
// oops, something went wrong
System.err.println( "Parsing failed. Reason: " + exp.getMessage() );
HelpFormatter formatter = new HelpFormatter();
formatter.printHelp( "list", options );
}
}
}