com/ohrasys/app/AppOption.java

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/* Copyright (C) 2004 Thomas N. Valine
 * tvaline@users.sourceforge.net
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA. */

package com.ohrasys.app;
import java.util.*;

public class AppOption {
  public static final int FLAG_TYPE = 0;

  public static final int OPTION_TYPE = 1;

  public static final int LIST_TYPE = 2;

  public static final int UNKNOWN = -1;

  public static final int UNLIMITED_LENGTH = -1;

  private int len;

  private String name;

  private int type;

  private String value;

  private AppOption(int type, String name, int numvalues) {
    if((type > LIST_TYPE) || (type < FLAG_TYPE)) {
      throw new IllegalArgumentException();
    }
    this.type  = type;
    this.name  = name;
    this.len   = numvalues;
    this.value = new String();
  }

  public static AppOption findListOption(AppOption options[]) {
    for(int i = 0;i < options.length;i++) {
      if(options[i].getType() == LIST_TYPE){return options[i];}
    }

    return null;
  }

  public static AppOption findOption(String name, AppOption options[]) {
    for(int i = 0;i < options.length;i++) {
      if(options[i].getName() == name){return options[i];}
    }

    return null;
  }

  public static AppOption getFlag(String name) {
    return new AppOption(FLAG_TYPE, name, 0);
  }

  public static AppOption getList() {
    return new AppOption(LIST_TYPE, new String(), UNLIMITED_LENGTH);
  }

  public static AppOption getOption(String name) {
    return new AppOption(OPTION_TYPE, name, 1);
  }

  public static AppOption getOption(String name, int numvalues) {
    return new AppOption(OPTION_TYPE, name, numvalues);
  }

  public static AppOption[] parseCLArgs(String args[], AppOption templates[])
    throws AppException {
    int             i       = 0;
    List<AppOption> options = new ArrayList<AppOption>(args.length);
    try {
      while(i < args.length) {
        String    name     = args[i++];
        AppOption template = findTemplate(name, templates);
        if(template == null){throw new AppException();}
        if(template.getType() == AppOption.LIST_TYPE) {
          if(hasMoreFlags(args, --i, templates)){throw new AppException();}
          else {
            String values = new String();
            while(i < args.length) {
              values += (args[i++] + " " /*NOI18N*/);
            }
            template.setValue(values.trim());
            AppOption result[] = new AppOption[options.size() + 1];
            result                    = ((AppOption[])options.toArray(result));
            result[result.length - 1] = template;

            return result;
          }
        } else {
          String values = new String();
          for(int j = 0;j < template.getLen();j++) {
            values += (args[i++] + " " /*NOI18N*/);
          }
          template.setValue(values.trim());
          options.add(template);
        }
      } // end while
    } catch(Exception e) {
      throw new AppException();
    }

    return ((AppOption[])options.toArray(new AppOption[options.size()]));
  } // end method parseCLArgs

  public int getLen(){return this.len;}

  public String getName(){return this.name;}

  public int getType(){return this.type;}

  public String getValue(){return this.value;}

  public void setValue(String value){this.value = value;}

  public String toString() {
    if(this.type == LIST_TYPE) {
      return ("INT_LIST" /*NOI18N*/ +
          ((value.length() != 0) ? (":" /*NOI18N*/ + value) : ("" /*NOI18N*/)));
    } else {
      return (name +
          ((value.length() != 0) ? (":" /*NOI18N*/ + value) : ("" /*NOI18N*/)));
    }
  }

  private static AppOption findTemplate(String name, AppOption templates[]) {
    boolean   listAllowed = false;
    AppOption listOption  = null;
    for(int i = 0;i < templates.length;i++) {
      if(templates[i].getName().equals(name)){return templates[i];}
      if(templates[i].getType() == AppOption.LIST_TYPE) {
        listAllowed = true;
        listOption  = templates[i];
      }
    }
    if(listAllowed){return listOption;}

    return null;
  }

  private static boolean hasMoreFlags(
      String args[], int start,
      AppOption templates[]) {
    for(int i = start;i < args.length;i++) {
      AppOption template = findTemplate(args[i], templates);
      if(((template == null) || (template.getType() != AppOption.LIST_TYPE))) {
        return true;
      } else {
        if(i == (args.length - 1)){return false;}
        else {
          continue;
        }
      }
    }

    return true;
  }
} // end class AppOption


/* This material is distributed under the GNU General Public License.
 * For more information please go to http://www.gnu.org/copyleft/gpl.html */

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