getopt.java

来自「CmisJavaApi」· Java 代码 · 共 125 行

/*
 * The contents of this file are subject to the Dyade Public License, 
 * as defined by the file DYADE_PUBLIC_LICENSE.TXT
 *
 * You may not use this file except in compliance with the License. You may
 * obtain a copy of the License on the Dyade web site (www.dyade.fr).
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
 * the specific terms governing rights and limitations under the License.
 *
 * The Original Code is CmisJava API, including the java package 
 * fr.dyade.cmis, released September 5, 2000.
 *
 * The Initial Developer of the Original Code is Dyade. The Original Code and
 * portions created by Dyade are Copyright Bull and Copyright INRIA. 
 * All Rights Reserved.
 */

/*      Copyright 1996-2000 by Institut National de Recherche en Informatique 
 *                             et en Automatique (INRIA)
 *          All rights reserved.  See COPYRIGHT in top-level directory.
 *
 *      Authors: Laurent Andrey, Eric Dillon, Olivier Festor
 */

//  $Id: GetOpt.java,v 1.2 2000/09/05 14:43:08 festor Exp $
//  $Source: /local/resedas/CVS-Repository/CmisJavaApi/src/fr/dyade/cmis/util/getopt/GetOpt.java,v $
//
package fr.dyade.cmis.util.getopt;

import java.util.Vector;
import java.util.Enumeration;

public abstract class GetOpt {
  public void scan( String[] args ) {
    fArgs=args;
    fNextArgIdx=0;
    short state=ON_OPTION;
    shiftArg();
    while (fLastArgType!=NO_MORE_ARGS_TYPE) {
      if (state==ON_PARAM) {
	fParams.addElement(fLastArg);
      } else {
	switch(fLastArgType) {
	case OPTION_TYPE:
	  scanOption();
	  break;
	case END_OPTION_TYPE:
	  state=ON_PARAM;
	default:
	  fParams.addElement(fLastArg);
	  break;
	}
      }
      shiftArg();
    }
  }
  
  public abstract void usage();
 
  private void scanOption()  {
    OptionDescriptor optDesc;
    try {
      optDesc= (OptionDescriptor)getClass().getField(fLastArg.substring(1)).get(this);
    } catch (Exception e) {
            System.err.println(fLastArg+ ": illegal option");
	    usage();
	    return;
    }
    switch (optDesc.type()) {
    case OptionDescriptor.EXACT_COUNT_CODE:
      optDesc.optionSeen();
      for (int i=0; i<optDesc.specifiedCount(); i++) {
	shiftArg();
	optDesc.processOptionParam(fLastArg);
      }
      break;
    }
  }
  public Enumeration enumParams() {
    return fParams.elements();
  }
  public String[] arrayParams () {
    //    return (String[])fParams.toArray(); //JDK 1.2
    String[] res=new String[fParams.size()];
    fParams.copyInto(res);
    return res;
  }
  public int getParamCount() {
    return fParams.size();
  }
  private void shiftArg() {
    if (fNextArgIdx<fArgs.length) {
      fLastArg=fArgs[fNextArgIdx];
      if ("--".compareTo(fLastArg)==0) {
	  fLastArgType=END_OPTION_TYPE;
	} else {
	  if (fLastArg.charAt(0)=='-') {
	    fLastArgType=OPTION_TYPE;
	  } else {
	    fLastArgType=PARAM_TYPE;
	  }
	}
    } else {
      fLastArgType=NO_MORE_ARGS_TYPE;
    }
    fNextArgIdx++;
  }
  private final static short ON_OPTION=0;
  private final static short ON_PARAM=1;

  private static final short OPTION_TYPE=0;
  private static final short PARAM_TYPE=1;
  private static final short END_OPTION_TYPE=2;
  private static final short NO_MORE_ARGS_TYPE=3;

  private String[] fArgs;
  private Vector fParams=new Vector();
  private int fNextArgIdx=0;
  private String fLastArg;
  private int fLastArgType=OPTION_TYPE;
  
}