/*
* 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 org.apache.oodt.commons.option.parser;
//JDK imports
import java.io.IOException;
import java.io.PrintStream;
import java.util.LinkedList;
import java.util.List;
//OODT imports
import org.apache.oodt.commons.option.CmdLineOption;
import org.apache.oodt.commons.option.CmdLineOptionInstance;
import org.apache.oodt.commons.option.OptionHelpException;
import org.apache.oodt.commons.option.util.CmdLineOptionUtils;
import org.apache.oodt.commons.option.util.CmdLineOptionsUsagePrinter;
/**
*
* @author bfoster
* @version $Revision$
*
* <p>Describe your class here</p>.
*/
public class CmdLineOptionParser {
private List<CmdLineOption> validOptions;
public List<CmdLineOption> getValidOptions() {
return validOptions;
}
public void setValidOptions(List<CmdLineOption> validOptions) {
this.validOptions = validOptions;
}
public List<CmdLineOptionInstance> parse(String[] args) throws IOException {
List<CmdLineOptionInstance> optionInstances = new LinkedList<CmdLineOptionInstance>();
if (args.length < 1)
throw new OptionHelpException(
"Must specify options : type -h or --help for info");
for (int j = 0; j < args.length; j++) {
String curArg = args[j];
// print usage and quit if -h or --help is given
if (curArg.equals("-h") || curArg.equals("--help")) {
if (args.length > j+1) {
String[] helpArgs = new String[args.length - j - 1];
System.arraycopy(args, j + 1, helpArgs, 0, helpArgs.length);
CmdLineOptionsUsagePrinter.printUsage(new PrintStream(
System.out), this.validOptions, this.parse(helpArgs).get(0));
}else {
CmdLineOptionsUsagePrinter.printUsage(new PrintStream(
System.out), this.validOptions);
}
System.exit(0);
}
if (curArg.startsWith("-")) {
// check if long or short version was used
if (curArg.startsWith("--"))
curArg = curArg.substring(2);
else
curArg = curArg.substring(1);
// check if option is a valid one
CmdLineOption curOption = CmdLineOptionUtils.getOptionByName(
curArg, validOptions);
if (curOption == null)
throw new IOException("Invalid option '" + curArg + "'");
// check if option has arguments
List<String> values = new LinkedList<String>();
if (curOption.hasArgs()) {
while (j + 1 < args.length && !args[j + 1].startsWith("-"))
values.add(args[++j]);
if (values.size() < 1)
throw new IOException("Option " + curArg
+ " should have at least one argument");
}
//check if is a perform and quit option
if (curOption.isPerformAndQuit()) {
curOption.getHandler().handleOption(curOption, values);
System.exit(0);
}
// add to list of option instances
optionInstances
.add(new CmdLineOptionInstance(curOption, values));
} else {
throw new IOException("Argument with no option flag '" + curArg
+ "'");
}
}
return optionInstances;
}
}