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The CRaSH cmdline module
There is a newer version: 1.2.0-cr6
/*
 * Copyright (C) 2010 eXo Platform SAS.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.crsh.cmdline;

import org.crsh.cmdline.binding.TypeBinding;
import org.crsh.cmdline.matcher.CmdSyntaxException;
import org.crsh.cmdline.spi.Completer;

import java.io.IOException;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

/**
 * @author Julien Viet
 * @version $Revision$
 */
public class OptionDescriptor extends ParameterDescriptor {

  /** . */
  private final int arity;

  /** . */
  private final List names;

  public OptionDescriptor(
    B binding,
    Type javaType,
    List names,
    Description info,
    boolean required,
    boolean password,
    boolean unquote,
    Class completerType,
    Annotation annotation) throws IllegalValueTypeException, IllegalParameterException {
    super(
      binding,
      javaType,
      info,
      required,
      password,
      unquote,
      completerType,
      annotation);

    //
    if (getMultiplicity() == Multiplicity.MULTI && getType() == SimpleValueType.BOOLEAN) {
      throw new IllegalParameterException();
    }

    //
    names = new ArrayList(names);
    for (String name : names) {
      if (name == null) {
        throw new IllegalParameterException("Option name must not be null");
      }
      if (name.length() == 0) {
        throw new IllegalParameterException("Option name cannot be empty");
      }
      if (name.contains("-")) {
        throw new IllegalParameterException("Option name must not contain the hyphen character");
      }
    }

    //
    if (getType() == SimpleValueType.BOOLEAN) {
      arity = 0;
    } else {
      arity = 1;
    }

    //
    this.names = Collections.unmodifiableList(names);
  }

  public int getArity() {
    return arity;
  }

  public List getNames() {
    return names;
  }

  @Override
  public Object parse(List values) throws CmdSyntaxException {
    if (arity == 0) {
      if (values.size() > 0) {
        throw new CmdSyntaxException("Too many option values: " + values);
      }
      // It's a boolean and it is true
      return Boolean.TRUE;
    } else {
      if (getMultiplicity() == Multiplicity.SINGLE) {
        if (values.size() > 1) {
          throw new CmdSyntaxException("Too many option values: " + values);
        }
        String value = values.get(0);
        try {
          return parse(value);
        } catch (Exception e) {
          throw new CmdSyntaxException("Could not parse value: <" + value + ">");
        }
      } else {
        List