bundles/org.eclipse.uomo.units/src/main/java/org/eclipse/uomo/units/impl/format/LocalUnitFormatParser.java - gerrit/uomo/org.eclipse.uomo - Git at Google

 /*
  * Copyright (c) 2005, 2017, Werner Keil and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  *    Werner Keil - initial API and implementation
  */
 package org.eclipse.uomo.units.impl.format;

 import static org.eclipse.uomo.units.impl.format.UnitTokenConstants.*;

 import javax.measure.Unit;

 import org.eclipse.uomo.units.AbstractUnit;
 import org.eclipse.uomo.units.impl.converter.LogConverter;
 import org.eclipse.uomo.units.impl.system.MetricPrefix;

 /**
  * @deprecated use {@link UnitFormatParser} FIXME there are some details e.g. Exception handling that are different, try to resolve or keep LUFP
  */
 @SuppressWarnings({ "rawtypes", "unchecked" })
 public final class LocalUnitFormatParser {

   private static class Exponent {

     public final int pow;

     public final int root;

     public Exponent(int pow, int root) {
       this.pow = pow;
       this.root = root;
     }
   }

   private SymbolMapImpl symbols;

   public LocalUnitFormatParser(SymbolMapImpl symbols, java.io.Reader in) {
     this(in);
     this.symbols = symbols;
   }

   final public Unit parseUnit() throws TokenException {
     Unit result = CompoundExpr();
     consumeToken(0);
     {
       return result;
     }
   }

   final public Unit CompoundExpr() throws TokenException {
     throw new UnsupportedOperationException("Compound units not supported");
   }

   final public Unit AddExpr() throws TokenException {
     Unit result = AbstractUnit.ONE;
     Number n1 = null;
     Token sign1 = null;
     Number n2 = null;
     Token sign2 = null;
     if (jj_2_1(2147483647)) {
       n1 = NumberExpr();
       sign1 = Sign();
     } else {
     }
     result = MulExpr();
     switch ((nextTokenIndex == -1) ? jj_ntk() : nextTokenIndex) {
       case PLUS:
       case MINUS:
         sign2 = Sign();
         n2 = NumberExpr();
         break;
       default:
         laA[1] = genInt;
     }
     if (n1 != null) {
       if (sign1.image.equals("-")) {
         result = result.multiply(-1);
       }
       result = result.shift(n1.doubleValue());
     }
     if (n2 != null) {
       double offset = n2.doubleValue();
       if (sign2.image.equals("-")) {
         offset = -offset;
       }
       result = result.shift(offset);
     }
     {
       return result;
     }
   }

   final public Unit MulExpr() throws TokenException {
     Unit result = AbstractUnit.ONE;
     Unit temp = AbstractUnit.ONE;
     result = ExponentExpr();
     label_2: while (true) {
       switch ((nextTokenIndex == -1) ? jj_ntk() : nextTokenIndex) {
         case ASTERISK:
         case MIDDLE_DOT:
         case SOLIDUS:
           break;
         default:
           laA[2] = genInt;
           break label_2;
       }
       switch ((nextTokenIndex == -1) ? jj_ntk() : nextTokenIndex) {
         case ASTERISK:
         case MIDDLE_DOT:
           switch ((nextTokenIndex == -1) ? jj_ntk() : nextTokenIndex) {
             case ASTERISK:
               consumeToken(ASTERISK);
               break;
             case MIDDLE_DOT:
               consumeToken(MIDDLE_DOT);
               break;
             default:
               laA[3] = genInt;
               consumeToken(-1);
               throw new TokenException();
           }
           temp = ExponentExpr();
           result = result.multiply(temp);
           break;
         case SOLIDUS:
           consumeToken(SOLIDUS);
           temp = ExponentExpr();
           result = result.divide(temp);
           break;
         default:
           laA[4] = genInt;
           consumeToken(-1);
           throw new TokenException();
       }
     }
     {
       return result;
     }
   }

   final public Unit ExponentExpr() throws TokenException {
     Unit result = AbstractUnit.ONE;
     Exponent exponent = null;
     Token token = null;
     if (jj_2_2(2147483647)) {
       switch ((nextTokenIndex == -1) ? jj_ntk() : nextTokenIndex) {
         case INTEGER:
           token = consumeToken(INTEGER);
           break;
         case E:
           token = consumeToken(E);
           break;
         default:
           laA[5] = genInt;
           consumeToken(-1);
           throw new TokenException();
       }
       consumeToken(CARET);
       result = AtomicExpr();
       double base;
       if (token.kind == INTEGER) {
         base = Integer.parseInt(token.image);
       } else {
         base = StrictMath.E;
       }
       {
         return result.transform(new LogConverter(base).inverse());
       }
     } else {
       switch ((nextTokenIndex == -1) ? jj_ntk() : nextTokenIndex) {
         case OPEN_PAREN:
         case INTEGER:
         case FLOATING_POINT:
         case UNIT_IDENTIFIER:
           result = AtomicExpr();
           switch ((nextTokenIndex == -1) ? jj_ntk() : nextTokenIndex) {
             case CARET:
             case SUPERSCRIPT_INTEGER:
               exponent = Exp();
               break;
             default:
               laA[6] = genInt;
           }
           if (exponent != null) {
             if (exponent.pow != 1) {
               result = result.pow(exponent.pow);
             }
             if (exponent.root != 1) {
               result = result.root(exponent.root);
             }
           }
           {
             return result;
           }
         case LOG:
         case NAT_LOG:
           switch ((nextTokenIndex == -1) ? jj_ntk() : nextTokenIndex) {
             case LOG:
               consumeToken(LOG);
               switch ((nextTokenIndex == -1) ? jj_ntk() : nextTokenIndex) {
                 case INTEGER:
                   token = consumeToken(INTEGER);
                   break;
                 default:
                   laA[7] = genInt;
               }
               break;
             case NAT_LOG:
               token = consumeToken(NAT_LOG);
               break;
             default:
               laA[8] = genInt;
               consumeToken(-1);
               throw new TokenException();
           }
           consumeToken(OPEN_PAREN);
           result = AddExpr();
           consumeToken(CLOSE_PAREN);
           double base = 10;
           if (token != null) {
             if (token.kind == INTEGER) {
               base = Integer.parseInt(token.image);
             } else if (token.kind == NAT_LOG) {
               base = StrictMath.E;
             }
           }
           {
             return result.transform(new LogConverter(base));
           }
         default:
           laA[9] = genInt;
           consumeToken(-1);
           throw new TokenException();
       }
     }
   }

   final public Unit AtomicExpr() throws TokenException {
     Unit result = AbstractUnit.ONE;
     Number n = null;
     Token token = null;
     switch ((nextTokenIndex == -1) ? jj_ntk() : nextTokenIndex) {
       case INTEGER:
       case FLOATING_POINT:
         n = NumberExpr();
         if (n instanceof Integer) {
           {
             return result.multiply(n.intValue());
           }
         } else {
           {
             return result.multiply(n.doubleValue());
           }
         }
       case UNIT_IDENTIFIER:
         token = consumeToken(UNIT_IDENTIFIER);
         Unit unit = symbols.getUnit(token.image);
         if (unit == null) {
           MetricPrefix prefix = symbols.getPrefix(token.image);
           if (prefix != null) {
             String prefixSymbol = symbols.getSymbol(prefix);
             unit = symbols.getUnit(token.image.substring(prefixSymbol.length()));
             if (unit != null) {
               {
                 return unit.transform(prefix.getConverter());
               }
             }
           }
           {
             throw new TokenException();
           }
         } else {
           {
             return unit;
           }
         }
       case OPEN_PAREN:
         consumeToken(OPEN_PAREN);
         result = AddExpr();
         consumeToken(CLOSE_PAREN);
         {
           return result;
         }
       default:
         laA[10] = genInt;
         consumeToken(-1);
         throw new TokenException();
     }
   }

   final public Token Sign() throws TokenException {
     Token result = null;
     switch ((nextTokenIndex == -1) ? jj_ntk() : nextTokenIndex) {
       case PLUS:
         result = consumeToken(PLUS);
         break;
       case MINUS:
         result = consumeToken(MINUS);
         break;
       default:
         laA[11] = genInt;
         consumeToken(-1);
         throw new TokenException();
     }
     {
       return result;
     }
   }

   final public Number NumberExpr() throws TokenException {
     Token token = null;
     switch ((nextTokenIndex == -1) ? jj_ntk() : nextTokenIndex) {
       case INTEGER:
         token = consumeToken(INTEGER);
         {
           return Long.valueOf(token.image);
         }
       case FLOATING_POINT:
         token = consumeToken(FLOATING_POINT);
         {
           return Double.valueOf(token.image);
         }
       default:
         laA[12] = genInt;
         consumeToken(-1);
         throw new TokenException();
     }
   }

   final public Exponent Exp() throws TokenException {
     Token powSign = null;
     Token powToken = null;
     Token rootSign = null;
     Token rootToken = null;
     switch ((nextTokenIndex == -1) ? jj_ntk() : nextTokenIndex) {
       case CARET:
         consumeToken(CARET);
         switch ((nextTokenIndex == -1) ? jj_ntk() : nextTokenIndex) {
           case PLUS:
           case MINUS:
           case INTEGER:
             switch ((nextTokenIndex == -1) ? jj_ntk() : nextTokenIndex) {
               case PLUS:
               case MINUS:
                 powSign = Sign();
                 break;
               default:
                 laA[13] = genInt;
             }
             powToken = consumeToken(INTEGER);
             int pow = Integer.parseInt(powToken.image);
             if ((powSign != null) && powSign.image.equals("-")) {
               pow = -pow;
             }
             {
               return new Exponent(pow, 1);
             }
           case OPEN_PAREN:
             consumeToken(OPEN_PAREN);
             switch ((nextTokenIndex == -1) ? jj_ntk() : nextTokenIndex) {
               case PLUS:
               case MINUS:
                 powSign = Sign();
                 break;
               default:
                 laA[14] = genInt;
             }
             powToken = consumeToken(INTEGER);
             switch ((nextTokenIndex == -1) ? jj_ntk() : nextTokenIndex) {
               case SOLIDUS:
                 consumeToken(SOLIDUS);
                 switch ((nextTokenIndex == -1) ? jj_ntk() : nextTokenIndex) {
                   case PLUS:
                   case MINUS:
                     rootSign = Sign();
                     break;
                   default:
                     laA[15] = genInt;
                 }
                 rootToken = consumeToken(INTEGER);
                 break;
               default:
                 laA[16] = genInt;
             }
             consumeToken(CLOSE_PAREN);
             pow = Integer.parseInt(powToken.image);
             if ((powSign != null) && powSign.image.equals("-")) {
               pow = -pow;
             }
             int root = 1;
             if (rootToken != null) {
               root = Integer.parseInt(rootToken.image);
               if ((rootSign != null) && rootSign.image.equals("-")) {
                 root = -root;
               }
             }
             {
               return new Exponent(pow, root);
             }
           default:
             laA[17] = genInt;
             consumeToken(-1);
             throw new TokenException();
         }
       case SUPERSCRIPT_INTEGER:
         powToken = consumeToken(SUPERSCRIPT_INTEGER);
         int pow = 0;
         for (int i = 0; i < powToken.image.length(); i += 1) {
           pow *= 10;
           switch (powToken.image.charAt(i)) {
             case '\u00b9':
               pow += 1;
               break;
             case '\u00b2':
               pow += 2;
               break;
             case '\u00b3':
               pow += 3;
               break;
             case '\u2074':
               pow += 4;
               break;
             case '\u2075':
               pow += 5;
               break;
             case '\u2076':
               pow += 6;
               break;
             case '\u2077':
               pow += 7;
               break;
             case '\u2078':
               pow += 8;
               break;
             case '\u2079':
               pow += 9;
               break;
           }
         }
         {
           return new Exponent(pow, 1);
         }
       default:
         laA[18] = genInt;
         consumeToken(-1);
         throw new TokenException();
     }
   }

   private boolean jj_2_1(int xla) {
     laInt = xla;
     lastpos = scanpos = token;
     try {
       return !jj_3_1();
     } catch (LookaheadSuccess ls) {
       return true;
     } finally {
       jj_save(0, xla);
     }
   }

   private boolean jj_2_2(int xla) {
     laInt = xla;
     lastpos = scanpos = token;
     try {
       return !jj_3_2();
     } catch (LookaheadSuccess ls) {
       return true;
     } finally {
       jj_save(1, xla);
     }
   }

   private boolean jj_3R_3() {
     Token xsp;
     xsp = scanpos;
     if (jj_3R_5()) {
       scanpos = xsp;
       if (jj_3R_6())
         return true;
     }
     return false;
   }

   private boolean jj_3R_6() {
     return scanToken(FLOATING_POINT);
   }

   private boolean jj_3_2() {
     Token xsp;
     xsp = scanpos;
     if (scanToken(14)) {
       scanpos = xsp;
       if (scanToken(19))
         return true;
     }
     return scanToken(CARET);
   }

   private boolean jj_3_1() {
     return jj_3R_3() || jj_3R_4();
   }

   private boolean jj_3R_4() {
     Token xsp;
     xsp = scanpos;
     if (scanToken(5)) {
       scanpos = xsp;
       if (scanToken(6))
         return true;
     }
     return false;
   }

   private boolean jj_3R_5() {
     return scanToken(INTEGER);
   }

   /** Generated Token Manager. */
   public UnitTokenManager tokenSource;

   DefaultCharStream inputStream;

   /** Current token. */
   public Token token;

   /** Next token. */
   public Token nextToken;

   private int nextTokenIndex;

   private Token scanpos, lastpos;

   private int laInt;

   private int genInt;

   final private int[] laA = new int[19];

   static private int[] laB;

   static {
     init();
   }

   private static void init() {
     laB = new int[] { 0x800, 0x60, 0x380, 0x180, 0x380, 0x84000, 0x8400, 0x4000, 0x60000, 0x175000, 0x115000, 0x60, 0x14000, 0x60, 0x60, 0x60, 0x200,
         0x5060, 0x8400, };
   }

   final private JJCalls[] rtns = new JJCalls[2];

   private boolean rescan = false;

   private int gcInt = 0;

   /** Constructor with InputStream. */
   public LocalUnitFormatParser(java.io.InputStream stream) {
     this(stream, null);
   }

   /** Constructor with InputStream and supplied encoding */
   public LocalUnitFormatParser(java.io.InputStream stream, String encoding) {
     try {
       inputStream = new DefaultCharStream(stream, encoding, 1, 1);
     } catch (java.io.UnsupportedEncodingException e) {
       throw new RuntimeException(e);
     }
     tokenSource = new UnitTokenManager(inputStream);
     token = new Token();
     nextTokenIndex = -1;
     genInt = 0;
     for (int i = 0; i < 19; i++) {
       laA[i] = -1;
     }
     for (int i = 0; i < rtns.length; i++) {
       rtns[i] = new JJCalls();
     }
   }

   /** Reinitialise. */
   public void ReInit(java.io.InputStream stream) {
     ReInit(stream, null);
   }

   /** Reinitialise. */
   public void ReInit(java.io.InputStream stream, String encoding) {
     try {
       inputStream.ReInit(stream, encoding, 1, 1);
     } catch (java.io.UnsupportedEncodingException e) {
       throw new RuntimeException(e);
     }
     tokenSource.ReInit(inputStream);
     token = new Token();
     nextTokenIndex = -1;
     genInt = 0;
     for (int i = 0; i < 19; i++) {
       laA[i] = -1;
     }
     for (int i = 0; i < rtns.length; i++) {
       rtns[i] = new JJCalls();
     }
   }

   /** Constructor. */
   public LocalUnitFormatParser(java.io.Reader stream) {
     inputStream = new DefaultCharStream(stream, 1, 1);
     tokenSource = new UnitTokenManager(inputStream);
     token = new Token();
     nextTokenIndex = -1;
     genInt = 0;
     for (int i = 0; i < 19; i++) {
       laA[i] = -1;
     }
     for (int i = 0; i < rtns.length; i++) {
       rtns[i] = new JJCalls();
     }
   }

   /** Reinitialise. */
   public void ReInit(java.io.Reader stream) {
     inputStream.ReInit(stream, 1, 1);
     tokenSource.ReInit(inputStream);
     token = new Token();
     nextTokenIndex = -1;
     genInt = 0;
     for (int i = 0; i < 19; i++) {
       laA[i] = -1;
     }
     for (int i = 0; i < rtns.length; i++) {
       rtns[i] = new JJCalls();
     }
   }

   /** Constructor with generated Token Manager. */
   public LocalUnitFormatParser(UnitTokenManager tm) {
     tokenSource = tm;
     token = new Token();
     nextTokenIndex = -1;
     genInt = 0;
     for (int i = 0; i < 19; i++) {
       laA[i] = -1;
     }
     for (int i = 0; i < rtns.length; i++) {
       rtns[i] = new JJCalls();
     }
   }

   /** Reinitialise. */
   public void ReInit(UnitTokenManager tm) {
     tokenSource = tm;
     token = new Token();
     nextTokenIndex = -1;
     genInt = 0;
     for (int i = 0; i < 19; i++) {
       laA[i] = -1;
     }
     for (int i = 0; i < rtns.length; i++) {
       rtns[i] = new JJCalls();
     }
   }

   private Token consumeToken(int kind) throws TokenException {
     Token oldToken;
     if ((oldToken = token).next != null)
       token = token.next;
     else
       token = token.next = tokenSource.getNextToken();
     nextTokenIndex = -1;
     if (token.kind == kind) {
       genInt++;
       if (++gcInt > 100) {
         gcInt = 0;
         for (JJCalls jj_2_rtn : rtns) {
           JJCalls c = jj_2_rtn;
           while (c != null) {
             if (c.gen < genInt)
               c.first = null;
             c = c.next;
           }
         }
       }
       return token;
     }
     token = oldToken;
     this.kind = kind;
     throw raiseTokenException();
   }

   static private final class LookaheadSuccess extends java.lang.RuntimeException {
     private static final long serialVersionUID = 2205332054119123041L;
   }

   private boolean scanToken(int kind) {
     if (scanpos == lastpos) {
       laInt--;
       if (scanpos.next == null) {
         lastpos = scanpos = scanpos.next = tokenSource.getNextToken();
       } else {
         lastpos = scanpos = scanpos.next;
       }
     } else {
       scanpos = scanpos.next;
     }
     if (rescan) {
       int i = 0;
       Token tok = token;
       while (tok != null && tok != scanpos) {
         i++;
         tok = tok.next;
       }
       if (tok != null)
         jj_add_error_token(kind, i);
     }
     if (scanpos.kind != kind)
       return true;
     if (laInt == 0 && scanpos == lastpos)
       throw new LookaheadSuccess();
     return false;
   }

   /** Get the next Token. */
   final public Token getNextToken() {
     if (token.next != null)
       token = token.next;
     else
       token = token.next = tokenSource.getNextToken();
     nextTokenIndex = -1;
     genInt++;
     return token;
   }

   /** Get the specific Token. */
   final public Token getToken(int index) {
     Token t = token;
     for (int i = 0; i < index; i++) {
       if (t.next != null)
         t = t.next;
       else
         t = t.next = tokenSource.getNextToken();
     }
     return t;
   }

   private int jj_ntk() {
     if ((nextToken = token.next) == null) {
       return (nextTokenIndex = (token.next = tokenSource.getNextToken()).kind);
     } else {
       return (nextTokenIndex = nextToken.kind);
     }
   }

   private final java.util.List<int[]> expentries = new java.util.ArrayList<>();

   private int[] expentry;

   private int kind = -1;

   private final int[] lastTokens = new int[100];

   private int endpos;

   private void jj_add_error_token(int kind, int pos) {
     if (pos >= 100)
       return;
     if (pos == endpos + 1) {
       lastTokens[endpos++] = kind;
     } else if (endpos != 0) {
       expentry = new int[endpos];
       System.arraycopy(lastTokens, 0, expentry, 0, endpos);
       entriesLoop: for (int[] jj_expentry1 : expentries) {
         if (jj_expentry1.length == expentry.length) {
           for (int i = 0; i < expentry.length; i++) {
             if (jj_expentry1[i] != expentry[i]) {
               continue entriesLoop;
             }
           }
           expentries.add(expentry);
           break;
         }
       }
       if (pos != 0)
         lastTokens[(endpos = pos) - 1] = kind;
     }
   }

   /** Generate TokenException. */
   TokenException raiseTokenException() {
     expentries.clear();
     boolean[] la1tokens = new boolean[21];
     if (kind >= 0) {
       la1tokens[kind] = true;
       kind = -1;
     }
     for (int i = 0; i < 19; i++) {
       if (laA[i] == genInt) {
         for (int j = 0; j < 32; j++) {
           if ((laB[i] & (1 << j)) != 0) {
             la1tokens[j] = true;
           }
         }
       }
     }
     for (int i = 0; i < 21; i++) {
       if (la1tokens[i]) {
         expentry = new int[1];
         expentry[0] = i;
         expentries.add(expentry);
       }
     }
     endpos = 0;
     jj_rescan_token();
     jj_add_error_token(0, 0);
     int[][] exptokseq = new int[expentries.size()][];
     for (int i = 0; i < expentries.size(); i++) {
       exptokseq[i] = expentries.get(i);
     }
     return new TokenException(token, exptokseq, tokenImage);
   }

   /** Enable tracing. */
   final public void enable_tracing() {
   }

   /** Disable tracing. */
   final public void disable_tracing() {
   }

   private void jj_rescan_token() {
     rescan = true;
     for (int i = 0; i < 2; i++) {
       try {
         JJCalls p = rtns[i];
         do {
           if (p.gen > genInt) {
             laInt = p.arg;
             lastpos = scanpos = p.first;
             switch (i) {
               case 0:
                 jj_3_1();
                 break;
               case 1:
                 jj_3_2();
                 break;
             }
           }
           p = p.next;
         } while (p != null);
       } catch (LookaheadSuccess ls) {
       }
     }
     rescan = false;
   }

   private void jj_save(int index, int xla) {
     JJCalls p = rtns[index];
     while (p.gen > genInt) {
       if (p.next == null) {
         p = p.next = new JJCalls();
         break;
       }
       p = p.next;
     }
     p.gen = genInt + xla - laInt;
     p.first = token;
     p.arg = xla;
   }

   static final class JJCalls {

     int gen;

     Token first;

     int arg;

     JJCalls next;
   }
 }
	/*
	* Copyright (c) 2005, 2017, Werner Keil and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/epl-v10.html
	*
	* Contributors:
	* Werner Keil - initial API and implementation
	*/
	package org.eclipse.uomo.units.impl.format;

	import static org.eclipse.uomo.units.impl.format.UnitTokenConstants.*;

	import javax.measure.Unit;

	import org.eclipse.uomo.units.AbstractUnit;
	import org.eclipse.uomo.units.impl.converter.LogConverter;
	import org.eclipse.uomo.units.impl.system.MetricPrefix;

	/**
	* @deprecated use {@link UnitFormatParser} FIXME there are some details e.g. Exception handling that are different, try to resolve or keep LUFP
	*/
	@SuppressWarnings({ "rawtypes", "unchecked" })
	public final class LocalUnitFormatParser {

	private static class Exponent {

	public final int pow;

	public final int root;

	public Exponent(int pow, int root) {
	this.pow = pow;
	this.root = root;
	}
	}

	private SymbolMapImpl symbols;

	public LocalUnitFormatParser(SymbolMapImpl symbols, java.io.Reader in) {
	this(in);
	this.symbols = symbols;
	}

	final public Unit parseUnit() throws TokenException {
	Unit result = CompoundExpr();
	consumeToken(0);
	{
	return result;
	}
	}

	final public Unit CompoundExpr() throws TokenException {
	throw new UnsupportedOperationException("Compound units not supported");
	}

	final public Unit AddExpr() throws TokenException {
	Unit result = AbstractUnit.ONE;
	Number n1 = null;
	Token sign1 = null;
	Number n2 = null;
	Token sign2 = null;
	if (jj_2_1(2147483647)) {
	n1 = NumberExpr();
	sign1 = Sign();
	} else {
	}
	result = MulExpr();
	switch ((nextTokenIndex == -1) ? jj_ntk() : nextTokenIndex) {
	case PLUS:
	case MINUS:
	sign2 = Sign();
	n2 = NumberExpr();
	break;
	default:
	laA[1] = genInt;
	}
	if (n1 != null) {
	if (sign1.image.equals("-")) {
	result = result.multiply(-1);
	}
	result = result.shift(n1.doubleValue());
	}
	if (n2 != null) {
	double offset = n2.doubleValue();
	if (sign2.image.equals("-")) {
	offset = -offset;
	}
	result = result.shift(offset);
	}
	{
	return result;
	}
	}

	final public Unit MulExpr() throws TokenException {
	Unit result = AbstractUnit.ONE;
	Unit temp = AbstractUnit.ONE;
	result = ExponentExpr();
	label_2: while (true) {
	switch ((nextTokenIndex == -1) ? jj_ntk() : nextTokenIndex) {
	case ASTERISK:
	case MIDDLE_DOT:
	case SOLIDUS:
	break;
	default:
	laA[2] = genInt;
	break label_2;
	}
	switch ((nextTokenIndex == -1) ? jj_ntk() : nextTokenIndex) {
	case ASTERISK:
	case MIDDLE_DOT:
	switch ((nextTokenIndex == -1) ? jj_ntk() : nextTokenIndex) {
	case ASTERISK:
	consumeToken(ASTERISK);
	break;
	case MIDDLE_DOT:
	consumeToken(MIDDLE_DOT);
	break;
	default:
	laA[3] = genInt;
	consumeToken(-1);
	throw new TokenException();
	}
	temp = ExponentExpr();
	result = result.multiply(temp);
	break;
	case SOLIDUS:
	consumeToken(SOLIDUS);
	temp = ExponentExpr();
	result = result.divide(temp);
	break;
	default:
	laA[4] = genInt;
	consumeToken(-1);
	throw new TokenException();
	}
	}
	{
	return result;
	}
	}

	final public Unit ExponentExpr() throws TokenException {
	Unit result = AbstractUnit.ONE;
	Exponent exponent = null;
	Token token = null;
	if (jj_2_2(2147483647)) {
	switch ((nextTokenIndex == -1) ? jj_ntk() : nextTokenIndex) {
	case INTEGER:
	token = consumeToken(INTEGER);
	break;
	case E:
	token = consumeToken(E);
	break;
	default:
	laA[5] = genInt;
	consumeToken(-1);
	throw new TokenException();
	}
	consumeToken(CARET);
	result = AtomicExpr();
	double base;
	if (token.kind == INTEGER) {
	base = Integer.parseInt(token.image);
	} else {
	base = StrictMath.E;
	}
	{
	return result.transform(new LogConverter(base).inverse());
	}
	} else {
	switch ((nextTokenIndex == -1) ? jj_ntk() : nextTokenIndex) {
	case OPEN_PAREN:
	case INTEGER:
	case FLOATING_POINT:
	case UNIT_IDENTIFIER:
	result = AtomicExpr();
	switch ((nextTokenIndex == -1) ? jj_ntk() : nextTokenIndex) {
	case CARET:
	case SUPERSCRIPT_INTEGER:
	exponent = Exp();
	break;
	default:
	laA[6] = genInt;
	}
	if (exponent != null) {
	if (exponent.pow != 1) {
	result = result.pow(exponent.pow);
	}
	if (exponent.root != 1) {
	result = result.root(exponent.root);
	}
	}
	{
	return result;
	}
	case LOG:
	case NAT_LOG:
	switch ((nextTokenIndex == -1) ? jj_ntk() : nextTokenIndex) {
	case LOG:
	consumeToken(LOG);
	switch ((nextTokenIndex == -1) ? jj_ntk() : nextTokenIndex) {
	case INTEGER:
	token = consumeToken(INTEGER);
	break;
	default:
	laA[7] = genInt;
	}
	break;
	case NAT_LOG:
	token = consumeToken(NAT_LOG);
	break;
	default:
	laA[8] = genInt;
	consumeToken(-1);
	throw new TokenException();
	}
	consumeToken(OPEN_PAREN);
	result = AddExpr();
	consumeToken(CLOSE_PAREN);
	double base = 10;
	if (token != null) {
	if (token.kind == INTEGER) {
	base = Integer.parseInt(token.image);
	} else if (token.kind == NAT_LOG) {
	base = StrictMath.E;
	}
	}
	{
	return result.transform(new LogConverter(base));
	}
	default:
	laA[9] = genInt;
	consumeToken(-1);
	throw new TokenException();
	}
	}
	}

	final public Unit AtomicExpr() throws TokenException {
	Unit result = AbstractUnit.ONE;
	Number n = null;
	Token token = null;
	switch ((nextTokenIndex == -1) ? jj_ntk() : nextTokenIndex) {
	case INTEGER:
	case FLOATING_POINT:
	n = NumberExpr();
	if (n instanceof Integer) {
	{
	return result.multiply(n.intValue());
	}
	} else {
	{
	return result.multiply(n.doubleValue());
	}
	}
	case UNIT_IDENTIFIER:
	token = consumeToken(UNIT_IDENTIFIER);
	Unit unit = symbols.getUnit(token.image);
	if (unit == null) {
	MetricPrefix prefix = symbols.getPrefix(token.image);
	if (prefix != null) {
	String prefixSymbol = symbols.getSymbol(prefix);
	unit = symbols.getUnit(token.image.substring(prefixSymbol.length()));
	if (unit != null) {
	{
	return unit.transform(prefix.getConverter());
	}
	}
	}
	{
	throw new TokenException();
	}
	} else {
	{
	return unit;
	}
	}
	case OPEN_PAREN:
	consumeToken(OPEN_PAREN);
	result = AddExpr();
	consumeToken(CLOSE_PAREN);
	{
	return result;
	}
	default:
	laA[10] = genInt;
	consumeToken(-1);
	throw new TokenException();
	}
	}

	final public Token Sign() throws TokenException {
	Token result = null;
	switch ((nextTokenIndex == -1) ? jj_ntk() : nextTokenIndex) {
	case PLUS:
	result = consumeToken(PLUS);
	break;
	case MINUS:
	result = consumeToken(MINUS);
	break;
	default:
	laA[11] = genInt;
	consumeToken(-1);
	throw new TokenException();
	}
	{
	return result;
	}
	}

	final public Number NumberExpr() throws TokenException {
	Token token = null;
	switch ((nextTokenIndex == -1) ? jj_ntk() : nextTokenIndex) {
	case INTEGER:
	token = consumeToken(INTEGER);
	{
	return Long.valueOf(token.image);
	}
	case FLOATING_POINT:
	token = consumeToken(FLOATING_POINT);
	{
	return Double.valueOf(token.image);
	}
	default:
	laA[12] = genInt;
	consumeToken(-1);
	throw new TokenException();
	}
	}

	final public Exponent Exp() throws TokenException {
	Token powSign = null;
	Token powToken = null;
	Token rootSign = null;
	Token rootToken = null;
	switch ((nextTokenIndex == -1) ? jj_ntk() : nextTokenIndex) {
	case CARET:
	consumeToken(CARET);
	switch ((nextTokenIndex == -1) ? jj_ntk() : nextTokenIndex) {
	case PLUS:
	case MINUS:
	case INTEGER:
	switch ((nextTokenIndex == -1) ? jj_ntk() : nextTokenIndex) {
	case PLUS:
	case MINUS:
	powSign = Sign();
	break;
	default:
	laA[13] = genInt;
	}
	powToken = consumeToken(INTEGER);
	int pow = Integer.parseInt(powToken.image);
	if ((powSign != null) && powSign.image.equals("-")) {
	pow = -pow;
	}
	{
	return new Exponent(pow, 1);
	}
	case OPEN_PAREN:
	consumeToken(OPEN_PAREN);
	switch ((nextTokenIndex == -1) ? jj_ntk() : nextTokenIndex) {
	case PLUS:
	case MINUS:
	powSign = Sign();
	break;
	default:
	laA[14] = genInt;
	}
	powToken = consumeToken(INTEGER);
	switch ((nextTokenIndex == -1) ? jj_ntk() : nextTokenIndex) {
	case SOLIDUS:
	consumeToken(SOLIDUS);
	switch ((nextTokenIndex == -1) ? jj_ntk() : nextTokenIndex) {
	case PLUS:
	case MINUS:
	rootSign = Sign();
	break;
	default:
	laA[15] = genInt;
	}
	rootToken = consumeToken(INTEGER);
	break;
	default:
	laA[16] = genInt;
	}
	consumeToken(CLOSE_PAREN);
	pow = Integer.parseInt(powToken.image);
	if ((powSign != null) && powSign.image.equals("-")) {
	pow = -pow;
	}
	int root = 1;
	if (rootToken != null) {
	root = Integer.parseInt(rootToken.image);
	if ((rootSign != null) && rootSign.image.equals("-")) {
	root = -root;
	}
	}
	{
	return new Exponent(pow, root);
	}
	default:
	laA[17] = genInt;
	consumeToken(-1);
	throw new TokenException();
	}
	case SUPERSCRIPT_INTEGER:
	powToken = consumeToken(SUPERSCRIPT_INTEGER);
	int pow = 0;
	for (int i = 0; i < powToken.image.length(); i += 1) {
	pow *= 10;
	switch (powToken.image.charAt(i)) {
	case '\u00b9':
	pow += 1;
	break;
	case '\u00b2':
	pow += 2;
	break;
	case '\u00b3':
	pow += 3;
	break;
	case '\u2074':
	pow += 4;
	break;
	case '\u2075':
	pow += 5;
	break;
	case '\u2076':
	pow += 6;
	break;
	case '\u2077':
	pow += 7;
	break;
	case '\u2078':
	pow += 8;
	break;
	case '\u2079':
	pow += 9;
	break;
	}
	}
	{
	return new Exponent(pow, 1);
	}
	default:
	laA[18] = genInt;
	consumeToken(-1);
	throw new TokenException();
	}
	}

	private boolean jj_2_1(int xla) {
	laInt = xla;
	lastpos = scanpos = token;
	try {
	return !jj_3_1();
	} catch (LookaheadSuccess ls) {
	return true;
	} finally {
	jj_save(0, xla);
	}
	}

	private boolean jj_2_2(int xla) {
	laInt = xla;
	lastpos = scanpos = token;
	try {
	return !jj_3_2();
	} catch (LookaheadSuccess ls) {
	return true;
	} finally {
	jj_save(1, xla);
	}
	}

	private boolean jj_3R_3() {
	Token xsp;
	xsp = scanpos;
	if (jj_3R_5()) {
	scanpos = xsp;
	if (jj_3R_6())
	return true;
	}
	return false;
	}

	private boolean jj_3R_6() {
	return scanToken(FLOATING_POINT);
	}

	private boolean jj_3_2() {
	Token xsp;
	xsp = scanpos;
	if (scanToken(14)) {
	scanpos = xsp;
	if (scanToken(19))
	return true;
	}
	return scanToken(CARET);
	}

	private boolean jj_3_1() {
	return jj_3R_3() \|\| jj_3R_4();
	}

	private boolean jj_3R_4() {
	Token xsp;
	xsp = scanpos;
	if (scanToken(5)) {
	scanpos = xsp;
	if (scanToken(6))
	return true;
	}
	return false;
	}

	private boolean jj_3R_5() {
	return scanToken(INTEGER);
	}

	/** Generated Token Manager. */
	public UnitTokenManager tokenSource;

	DefaultCharStream inputStream;

	/** Current token. */
	public Token token;

	/** Next token. */
	public Token nextToken;

	private int nextTokenIndex;

	private Token scanpos, lastpos;

	private int laInt;

	private int genInt;

	final private int[] laA = new int[19];

	static private int[] laB;

	static {
	init();
	}

	private static void init() {
	laB = new int[] { 0x800, 0x60, 0x380, 0x180, 0x380, 0x84000, 0x8400, 0x4000, 0x60000, 0x175000, 0x115000, 0x60, 0x14000, 0x60, 0x60, 0x60, 0x200,
	0x5060, 0x8400, };
	}

	final private JJCalls[] rtns = new JJCalls[2];

	private boolean rescan = false;

	private int gcInt = 0;

	/** Constructor with InputStream. */
	public LocalUnitFormatParser(java.io.InputStream stream) {
	this(stream, null);
	}

	/** Constructor with InputStream and supplied encoding */
	public LocalUnitFormatParser(java.io.InputStream stream, String encoding) {
	try {
	inputStream = new DefaultCharStream(stream, encoding, 1, 1);
	} catch (java.io.UnsupportedEncodingException e) {
	throw new RuntimeException(e);
	}
	tokenSource = new UnitTokenManager(inputStream);
	token = new Token();
	nextTokenIndex = -1;
	genInt = 0;
	for (int i = 0; i < 19; i++) {
	laA[i] = -1;
	}
	for (int i = 0; i < rtns.length; i++) {
	rtns[i] = new JJCalls();
	}
	}

	/** Reinitialise. */
	public void ReInit(java.io.InputStream stream) {
	ReInit(stream, null);
	}

	/** Reinitialise. */
	public void ReInit(java.io.InputStream stream, String encoding) {
	try {
	inputStream.ReInit(stream, encoding, 1, 1);
	} catch (java.io.UnsupportedEncodingException e) {
	throw new RuntimeException(e);
	}
	tokenSource.ReInit(inputStream);
	token = new Token();
	nextTokenIndex = -1;
	genInt = 0;
	for (int i = 0; i < 19; i++) {
	laA[i] = -1;
	}
	for (int i = 0; i < rtns.length; i++) {
	rtns[i] = new JJCalls();
	}
	}

	/** Constructor. */
	public LocalUnitFormatParser(java.io.Reader stream) {
	inputStream = new DefaultCharStream(stream, 1, 1);
	tokenSource = new UnitTokenManager(inputStream);
	token = new Token();
	nextTokenIndex = -1;
	genInt = 0;
	for (int i = 0; i < 19; i++) {
	laA[i] = -1;
	}
	for (int i = 0; i < rtns.length; i++) {
	rtns[i] = new JJCalls();
	}
	}

	/** Reinitialise. */
	public void ReInit(java.io.Reader stream) {
	inputStream.ReInit(stream, 1, 1);
	tokenSource.ReInit(inputStream);
	token = new Token();
	nextTokenIndex = -1;
	genInt = 0;
	for (int i = 0; i < 19; i++) {
	laA[i] = -1;
	}
	for (int i = 0; i < rtns.length; i++) {
	rtns[i] = new JJCalls();
	}
	}

	/** Constructor with generated Token Manager. */
	public LocalUnitFormatParser(UnitTokenManager tm) {
	tokenSource = tm;
	token = new Token();
	nextTokenIndex = -1;
	genInt = 0;
	for (int i = 0; i < 19; i++) {
	laA[i] = -1;
	}
	for (int i = 0; i < rtns.length; i++) {
	rtns[i] = new JJCalls();
	}
	}

	/** Reinitialise. */
	public void ReInit(UnitTokenManager tm) {
	tokenSource = tm;
	token = new Token();
	nextTokenIndex = -1;
	genInt = 0;
	for (int i = 0; i < 19; i++) {
	laA[i] = -1;
	}
	for (int i = 0; i < rtns.length; i++) {
	rtns[i] = new JJCalls();
	}
	}

	private Token consumeToken(int kind) throws TokenException {
	Token oldToken;
	if ((oldToken = token).next != null)
	token = token.next;
	else
	token = token.next = tokenSource.getNextToken();
	nextTokenIndex = -1;
	if (token.kind == kind) {
	genInt++;
	if (++gcInt > 100) {
	gcInt = 0;
	for (JJCalls jj_2_rtn : rtns) {
	JJCalls c = jj_2_rtn;
	while (c != null) {
	if (c.gen < genInt)
	c.first = null;
	c = c.next;
	}
	}
	}
	return token;
	}
	token = oldToken;
	this.kind = kind;
	throw raiseTokenException();
	}

	static private final class LookaheadSuccess extends java.lang.RuntimeException {
	private static final long serialVersionUID = 2205332054119123041L;
	}

	private boolean scanToken(int kind) {
	if (scanpos == lastpos) {
	laInt--;
	if (scanpos.next == null) {
	lastpos = scanpos = scanpos.next = tokenSource.getNextToken();
	} else {
	lastpos = scanpos = scanpos.next;
	}
	} else {
	scanpos = scanpos.next;
	}
	if (rescan) {
	int i = 0;
	Token tok = token;
	while (tok != null && tok != scanpos) {
	i++;
	tok = tok.next;
	}
	if (tok != null)
	jj_add_error_token(kind, i);
	}
	if (scanpos.kind != kind)
	return true;
	if (laInt == 0 && scanpos == lastpos)
	throw new LookaheadSuccess();
	return false;
	}

	/** Get the next Token. */
	final public Token getNextToken() {
	if (token.next != null)
	token = token.next;
	else
	token = token.next = tokenSource.getNextToken();
	nextTokenIndex = -1;
	genInt++;
	return token;
	}

	/** Get the specific Token. */
	final public Token getToken(int index) {
	Token t = token;
	for (int i = 0; i < index; i++) {
	if (t.next != null)
	t = t.next;
	else
	t = t.next = tokenSource.getNextToken();
	}
	return t;
	}

	private int jj_ntk() {
	if ((nextToken = token.next) == null) {
	return (nextTokenIndex = (token.next = tokenSource.getNextToken()).kind);
	} else {
	return (nextTokenIndex = nextToken.kind);
	}
	}

	private final java.util.List<int[]> expentries = new java.util.ArrayList<>();

	private int[] expentry;

	private int kind = -1;

	private final int[] lastTokens = new int[100];

	private int endpos;

	private void jj_add_error_token(int kind, int pos) {
	if (pos >= 100)
	return;
	if (pos == endpos + 1) {
	lastTokens[endpos++] = kind;
	} else if (endpos != 0) {
	expentry = new int[endpos];
	System.arraycopy(lastTokens, 0, expentry, 0, endpos);
	entriesLoop: for (int[] jj_expentry1 : expentries) {
	if (jj_expentry1.length == expentry.length) {
	for (int i = 0; i < expentry.length; i++) {
	if (jj_expentry1[i] != expentry[i]) {
	continue entriesLoop;
	}
	}
	expentries.add(expentry);
	break;
	}
	}
	if (pos != 0)
	lastTokens[(endpos = pos) - 1] = kind;
	}
	}

	/** Generate TokenException. */
	TokenException raiseTokenException() {
	expentries.clear();
	boolean[] la1tokens = new boolean[21];
	if (kind >= 0) {
	la1tokens[kind] = true;
	kind = -1;
	}
	for (int i = 0; i < 19; i++) {
	if (laA[i] == genInt) {
	for (int j = 0; j < 32; j++) {
	if ((laB[i] & (1 << j)) != 0) {
	la1tokens[j] = true;
	}
	}
	}
	}
	for (int i = 0; i < 21; i++) {
	if (la1tokens[i]) {
	expentry = new int[1];
	expentry[0] = i;
	expentries.add(expentry);
	}
	}
	endpos = 0;
	jj_rescan_token();
	jj_add_error_token(0, 0);
	int[][] exptokseq = new int[expentries.size()][];
	for (int i = 0; i < expentries.size(); i++) {
	exptokseq[i] = expentries.get(i);
	}
	return new TokenException(token, exptokseq, tokenImage);
	}

	/** Enable tracing. */
	final public void enable_tracing() {
	}

	/** Disable tracing. */
	final public void disable_tracing() {
	}

	private void jj_rescan_token() {
	rescan = true;
	for (int i = 0; i < 2; i++) {
	try {
	JJCalls p = rtns[i];
	do {
	if (p.gen > genInt) {
	laInt = p.arg;
	lastpos = scanpos = p.first;
	switch (i) {
	case 0:
	jj_3_1();
	break;
	case 1:
	jj_3_2();
	break;
	}
	}
	p = p.next;
	} while (p != null);
	} catch (LookaheadSuccess ls) {
	}
	}
	rescan = false;
	}

	private void jj_save(int index, int xla) {
	JJCalls p = rtns[index];
	while (p.gen > genInt) {
	if (p.next == null) {
	p = p.next = new JJCalls();
	break;
	}
	p = p.next;
	}
	p.gen = genInt + xla - laInt;
	p.first = token;
	p.arg = xla;
	}

	static final class JJCalls {

	int gen;

	Token first;

	int arg;

	JJCalls next;
	}
	}