/**
* 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.sqoop.shell;
import java.util.Iterator;
import java.util.List;
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.Options;
import org.apache.commons.cli.ParseException;
import org.apache.sqoop.common.SqoopException;
import org.apache.sqoop.shell.core.ShellError;
import static org.apache.sqoop.shell.ShellEnvironment.*;
@SuppressWarnings("serial")
abstract public class SqoopFunction extends Options {
public void printHelp() {
HelpFormatter formatter = new HelpFormatter();
formatter.printOptions(getIo().out, formatter.getWidth(), this, 0, 4);
}
public abstract Object executeFunction(CommandLine line);
public Object execute(List<String> args) {
CommandLine line = parseOptions(this, 1, args);
return executeFunction(line);
}
protected CommandLine parseOptions(Options options, int start, List<String> arglist) {
Iterator<String> iterator = arglist.iterator();
int i = 0;
for (; i < start; i ++) {
iterator.next();
}
String[] args = new String[arglist.size() - start];
for (; i < arglist.size(); i ++) {
args[i - start] = iterator.next();
}
CommandLineParser parser = new GnuParser();
CommandLine line;
try {
line = parser.parse(options, args);
} catch (ParseException e) {
throw new SqoopException(ShellError.SHELL_0003, e.getMessage(), e);
}
return line;
}
protected long getLong(CommandLine line, String parameterName) {
return Long.parseLong(line.getOptionValue(parameterName));
}
}