parquet-tools-deprecated/src/main/java/org/apache/parquet/tools/command/ArgsOnlyCommand.java

/* 
 * 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.parquet.tools.command;

import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.MissingArgumentException;
import org.apache.commons.cli.Options;
import org.apache.commons.cli.UnrecognizedOptionException;

public abstract class ArgsOnlyCommand implements Command {
  private final int min;
  private final int max;

  public ArgsOnlyCommand(int min, int max) {
    this.min = min;
    this.max = max;
  }

  @Override
  public Options getOptions() {
    return null;
  }

  @Override
  public boolean supportsExtraArgs() {
    return true;
  }

  @Override
  public void execute(CommandLine options) throws Exception {
    String[] args = options.getArgs();
    if (args.length < min) {
      throw new MissingArgumentException("missing required arguments");
    }

    if (args.length > max) {
      throw new UnrecognizedOptionException("unknown extra argument \"" + args[max] + "\"");
    }
  }
}