/*
* 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 );
}
}
}