001package com.hfg.math.units;
002
003
004import com.hfg.util.StringUtil;
005
006import java.util.HashMap;
007import java.util.Map;
008
009//------------------------------------------------------------------------------
010/**
011 * Enumeration of angle measurement units.
012 *
013 * @author J. Alex Taylor, hairyfatguy.com
014 */
015//------------------------------------------------------------------------------
016// com.hfg XML/HTML Coding Library
017//
018// This library is free software; you can redistribute it and/or
019// modify it under the terms of the GNU Lesser General Public
020// License as published by the Free Software Foundation; either
021// version 2.1 of the License, or (at your option) any later version.
022//
023// This library is distributed in the hope that it will be useful,
024// but WITHOUT ANY WARRANTY; without even the implied warranty of
025// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
026// Lesser General Public License for more details.
027//
028// You should have received a copy of the GNU Lesser General Public
029// License along with this library; if not, write to the Free Software
030// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
031//
032// J. Alex Taylor, President, Founder, CEO, COO, CFO, OOPS hairyfatguy.com
033// jataylor@hairyfatguy.com
034//------------------------------------------------------------------------------
035
036public class AngleUnits
037{
038   private static Map<String, AngleUnits> sInstanceMap = new HashMap<>();
039
040   public static final AngleUnits degrees     = new AngleUnits("degrees",    "deg");
041   public static final AngleUnits radians     = new AngleUnits("radians",    "rad");
042
043
044   private String mName;
045   private String mAbbrev;
046
047
048   //---------------------------------------------------------------------------
049   private AngleUnits(String inName, String inAbbrev)
050   {
051      mName = inName;
052      mAbbrev = inAbbrev;
053
054      sInstanceMap.put(mName.toLowerCase(), this);
055      sInstanceMap.put(mAbbrev.toLowerCase(), this);
056   }
057
058   //---------------------------------------------------------------------------
059   public String name()
060   {
061      return mName;
062   }
063
064   //---------------------------------------------------------------------------
065   public String abbrev()
066   {
067      return mAbbrev;
068   }
069
070   //---------------------------------------------------------------------------
071   @Override
072   public String toString()
073   {
074      return name();
075   }
076
077
078   //---------------------------------------------------------------------------
079   public static AngleUnits valueOf(String inString)
080   {
081      return StringUtil.isSet(inString) ? sInstanceMap.get(inString.toLowerCase()) : null;
082   }
083
084}