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• LcNum.java

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com.adobe.xfa.ut.LcNum Maven / Gradle / Ivy

/*
 * ADOBE CONFIDENTIAL
 *
 * Copyright 2005 Adobe Systems Incorporated All Rights Reserved.
 *
 * NOTICE: All information contained herein is, and remains the property of
 * Adobe Systems Incorporated and its suppliers, if any. The intellectual and
 * technical concepts contained herein are proprietary to Adobe Systems
 * Incorporated and its suppliers and may be covered by U.S. and Foreign
 * Patents, patents in process, and are protected by trade secret or copyright
 * law. Dissemination of this information or reproduction of this material
 * is strictly forbidden unless prior written permission is obtained from
 * Adobe Systems Incorporated.
 */

package com.adobe.xfa.ut;

import java.text.*;
import java.util.*;
import java.math.*;

/**
 * LcNum defines numeric objects
 * in support of XFA numeric picture patterns.
 * 
 * 
Numeric picture patterns are used to parse and format
 * numeric strings.  Here are the metasymbols that form valid
 * text picture patterns:
 * 

 * 
 9       
 when output formatting, this is a single digit, or
 *					 a zero digit if the input is a space or empty;

 *					 when input parsing, this is a single digit.
 * 
 Z       
 when output formatting, this is a single digit, or
 *					 a space if the input is a zero digit, a space, or empty;

 *					 when input parsing, this is a single digit or space.
 * 
 z       
 when output formatting, this is a single digit or
 *					 nothing if the input is a zero digit, a space or empty;

 *					 when input parsing, this is a single digit, or nothing.
 * 
 S       
 a minus sign if negative, a plus sign if positive, or
 *                   a space otherwise when input parsing; a minus sign if
 *                   negative and a space otherwise when output formmatting.
 * 
 s       
 a minus sign if negative, a plus sign if positive, or
 *                   nothing otherwise when input parsing; a minus sign if
 *                   negative and nothing otherwise when output formmatting.
 * 
 CR      
 a credit symbol (CR) if negative, or (2) spaces otherwise.
 * 
 cr      
 a credit symbol (CR) if negative, or nothing otherwise.
 * 
 DB      
 a debit symbol (DB) if negative, or (2) spaces otherwise.
 * 
 db      
 a debit symbol (db) if negative, or nothing otherwise.
 * 
 (       
 a left parenthesis symbol if negative, or nothing
 *                   otherwise.
 * 
 )       
 a right parenthesis symbol if negative, or nothing
 *                   otherwise.
 * 
 E       
 an exponent symbol and exponent value.
 * 
 $       
 a currency symbol of the ambient locale.
 * 
 $$      
 an international currency name of the ambient locale.
 * 
 .       
 a decimal radix symbol of the ambient locale.
 * 
 V       
 a decimal radix symbol of the ambient locale,
 *					 which may be implied when input parsing.
 * 
 v       
 a decimal radix symbol of the ambient locale,
 *					 which may be implied
 *                   when input parsing and output formatting.
 * 
 ,       
 a grouping separator symbol of the ambient locale.
 * 
 *
 * Here's a snippet of code illustrating the use of
 * {@link LcNum} to reformat a text string
 * 

 *      import com.adobe.xfa.ut.LcNum; 
 *      ...
 *      LcNum num = new LcNum("007", "en_US");
 *      if (num.isValid())
 *          String s = text.format(".999$");
 * 
 *
 * @author Mike P. Tardif
 *
 * @exclude from published api.
 */
public class LcNum {

	/**
	 * An inner class to represent this object's locale sensitive
	 * numeric symbols.
	 */
	static class Symbols {
		
		public Symbols(
			String radixSymbol,
			String negativeSymbol,
			String positiveSymbol,
			String groupingSymbol,
			String percentSymbol,
			String currencySymbol,
			String currencyName,
			char zeroDigit) {
			this.radixSymbol = radixSymbol;
			this.negativeSymbol = negativeSymbol;
			this.positiveSymbol = positiveSymbol;
			this.groupingSymbol = groupingSymbol;
			this.percentSymbol = percentSymbol;
			this.currencySymbol = currencySymbol;
			this.currencyName = currencyName;
			this.zeroDigit = zeroDigit;
			
		}
		
        final String radixSymbol;
        final String negativeSymbol;
        final String positiveSymbol;
        final String groupingSymbol;
        final String percentSymbol;
        final String currencySymbol;
        final String currencyName;
        final char zeroDigit;
    };         


	/**
	 * An arbitrarily limited maximal decimal precision: 15.
	 */
	public static final int MAX_PRECISION = 15;

    /**
     * LcNum pattern symbols: (%$,.)89BCDERSVZbcdrsvzt.
     */
    public static final String NUMERIC_PICTURE_SYMBOLS
											= "(%$,.)89BCDERSVZbcdrsvzt";

    /**
     * Instantiates an LcNum object from the given text and in the locale given.
     * @param text
	 *         a text string.
     * @param locale
	 *         a locale name.  When empty, it will default
	 *         to the current locale.
     */
	public LcNum(String text, String locale) {
		String sLocale = StringUtils.isEmpty(locale) ? LcLocale.getLocale() : locale;
		LcLocale lcLocale = new LcLocale(sLocale);
		mLocale = lcLocale.isValid() ? lcLocale : new LcLocale(LcLocale.DEFAULT_LOCALE);
		
		LcData oData = new LcData(locale);
		mSymbols = new Symbols(
				oData.getRadixSymbol(),
				oData.getNegativeSymbol(),
				oData.getPositiveSymbol(),
				oData.getGroupingSymbol(),
				oData.getPercentSymbol(),
				oData.getCurrencySymbol(),
				oData.getCurrencyName(),
				oData.getZeroSymbol().charAt(0));
		
		msText = new StringBuilder();
		if (text != null)
			msText.append(text);
		mdValue = 0.0;
		mbValid = true;
	}


    /**
     * Instantiates an LcNum object from the given text and pattern pattern
     * and in the locale given.
     * @param text
	 *         a text string.
     * @param pic
	 *         a numeric pattern pattern.
     * @param locale
	 *         a locale name.  When empty, it will default
	 *         to the current locale.
     */
	public LcNum(String text, String pic, String locale) {
		this(text, locale);
		mbValid = parse(msText.toString(), pic);
	}


    /**
     * Gets the parsed text.
     * @return
	 *         the text associated with this object.
     */
    public String getText() {
		return msText.toString();
	}

    /**
     * Gets the parsed value.
     * @return
	 *         the number associated with this object.
     */
    public double getValue() {
		return mdValue;
	}

    /**
     * Determines if this LcNum object is valid.
     * @return
	 *         boolean true if valid, and false otherwise.
     */
    public boolean isValid() {
		return mbValid;
	}


    /**
     * Formats this LcNum object given a pattern string.
     * @param pat
	 *         a pattern string.
     * @param radixPos
	 *         the returned radix position within the formatted string
	 *         if specified.
     * @return
	 *         the text string formatted according to the given format
	 *         string, upon success, and the empty string, upon error.
     */
    public String format(String pat, IntegerHolder radixPos /* = null */) {
		int nRadixPos = ~0;
		StringBuilder sRes = new StringBuilder();
		try {
			//
			// Translate numeric pattern to something than can be formatted
			// more easily.  Set state flags and values from pattern to let
			// us anticipate what's coming.
			//
			String pic = xlate(pat);
			//
			// Reset needed state formatting flags.
			//
			mbNegative = false;
			//
			// Convert to text to a numeric value.  Round the value
			// to the number of insignificant digits in the pattern.
			//
			int prec = mnInSignf;
			if (mbExponSeen)
				prec += mnSignf;
			if (mbPercentSeen)
				prec += 2;
			double dbl = strToDbl(msText.toString(), prec);
			//
			// Do normalize +/- zeroes for Unix.
			//
			if (dbl == -0.0)
				dbl = 0.0;
			//
			// Determine the precision of this object's number.
			//
			int nPrec = mnInSignf;
			int nDot = msText.indexOf(".");
			if (nDot >= 0)
				nPrec = msText.length() - nDot - 1; 
			else if (mbOnly8Seen)
				nPrec = -1; 
			mdValue = dbl;
			if (dbl < 0.0) {
				dbl = -dbl;
				mbNegative = true;
			}
			if (dbl != 0.0) {
				mbOnlyZedSeen = false;
			}
			//
			// Normalize the value whenever an exponent was seen in the pattern.
			//
			if (mbExponSeen) {
				//
				// ... no significant digits.
				//
				for (mnExpon = 0; dbl >= 1.0; mnExpon++)
					dbl /= 10;
				for (; 0.0 < dbl && dbl < 1.0; mnExpon--)
					dbl *= 10;
				for (int i = 1; i < mnSignf; i++, mnExpon--) 
					dbl *= 10;
			}
			else if (mbPercentSeen) {
				dbl *= 100;
			}
			//
			// Convert the numeric value back to text in
			// the required width, precision, and format.
			//
			int fmt = 1;
			int width = mnSignf;
			//
			// Watson fix 1226147 -- don't format in a terminating radix if
			// no radix needed or seen only fractional picture '8'.
			//
			if (mbExponSeen || nPrec > mnInSignf || ! mbOnly8Seen) {
				width += mnInSignf;
				if (mbRadixSeen)
					width++;
				else
					fmt = 0;
				nPrec = mnInSignf;
			}
			else /* if (mbOnly8Seen) */ {
				if (nPrec >= 0)
					width += nPrec + 1;
				else
					fmt = 0;
			}
			if (! dblToStr(msText, dbl, width, nPrec, fmt))
				throw new ExFull();
			//
			// Trim leading 0 if only fractional digits seen in the pattern.
			//
			if (mbFracDigitSeen && dbl < 1.)
				msText.deleteCharAt(0);
			//
			// Reset needed state formatting flags.
			//
			mbDigitSeen = false;
			mbRadixSeen = false;
			//
			// Initialize finite state machine that will format the pattern.
			//
			char prevChr = 0;
			int chrCnt = 0;
			boolean inQuoted = false;
			boolean inQuoteQuoted = false;
			boolean bRadixSeen = false;
			//
			// Foreach each character of the pattern Do ...
			//
			int picLen = pic.length();
			int txtLen = msText.length();
			int txtIdx = 0;
			for (int i = 0; i < picLen; ) {
				char chr = pic.charAt(i++);
				//
				// If seen a quote within a quoted string ...
				//
				if (inQuoteQuoted) {
					if (chr == '\'') {     // cases like '...''
						sRes.append(chr);
						chrCnt = 0;
					}
					else {                  // cases like '...'X
						inQuoted = false;
						chrCnt = 1;
						prevChr = chr;
					}
					inQuoteQuoted = false;
				}
				//
				// Elif within a quoted string ...
				//
				else if (inQuoted) {
					if (chr == '\'') {     // cases like '...'
						inQuoteQuoted = true;
					}
					else {                  // cases like '...X
						sRes.append(chr);
					}
					chrCnt++;
				}
				//
				// Elif start of a quoted string ...
				//
				else if (chr == '\'') {
					if (chrCnt > 0) {       // cases like ...X'
						bRadixSeen = mbRadixSeen;
						int nPos = sRes.length();
						txtIdx = subFormat(prevChr, chrCnt, txtIdx, sRes);
						if (! bRadixSeen && mbRadixSeen)
							nRadixPos = nPos;
						chrCnt = 0;
						prevChr = 0;
					}
					inQuoted = true;
				}
				//
				// Elif start of a metacharacter ...
				//
				else if (DateTimeUtil.matchChr(NUMERIC_PICTURE_SYMBOLS, chr)
				|| ('a' <= chr && chr <= 'z' || 'A' <= chr && chr <= 'Z')) {
					if (chr != prevChr) {
						if (chrCnt > 0) {   // cases like AAX
							bRadixSeen = mbRadixSeen;
							int nPos = sRes.length();
							txtIdx = subFormat(prevChr, chrCnt, txtIdx, sRes);
							if (! bRadixSeen && mbRadixSeen)
								nRadixPos = nPos;
							chrCnt = 0;
						}
						prevChr = chr;
					}
					chrCnt++;
				}
				//
				// Elif start of a literal ...
				//
				else {
					if (chrCnt > 0) {      // cases like AA-
						bRadixSeen = mbRadixSeen;
						int nPos = sRes.length();
						txtIdx = subFormat(prevChr, chrCnt, txtIdx, sRes);
						if (! bRadixSeen && mbRadixSeen)
							nRadixPos = nPos;
						chrCnt = 0;
					}
					prevChr = 0;
					if (chr == '?' || chr == '*' || chr == '+')
						sRes.append(' ');
					else
						sRes.append(chr);
				}
			}
			//
			// Ensure quoted string is terminated.
			//
			if (inQuoteQuoted)
				inQuoted = false;
			if (inQuoted)
				throw new ExFull();
			//
			// Format any remaining items in the pattern.
			//
			if (prevChr > 0 && chrCnt > 0) {
				bRadixSeen = mbRadixSeen;
				int nPos = sRes.length();
				txtIdx = subFormat(prevChr, chrCnt, txtIdx, sRes);
				if (! bRadixSeen && mbRadixSeen)
					nRadixPos = nPos;
			}
			//
			// Ensure there's no more source to format. Fix for roach #668479.
			//
			if (txtIdx > 0 && txtIdx < txtLen)
				sRes.setLength(0);
			if (! mbRadixSeen)
				nRadixPos = ~0;
		} catch(ExFull e) {
			sRes.setLength(0);
		}
		//
		// convert radix UTF-8 byte index into a Unicode character index.
		//
		if (radixPos != null) {
			radixPos.value = nRadixPos;
		}
		return sRes.toString();
	}


    /**
     * Parses the given string according to the text pattern given.
	 * @param sStr
	 *         the text string to parse.
	 * @param pat
	 *         a pattern string.
	 * @return
	 *         boolean true if successfully parsed, and false otherwise.
     */
    public boolean parse(String sStr, String pat) {
		boolean bRes = true;
		try {
			//
			// Translate numeric pattern to something than can be formatted
			// more easily.  Set state flags and values from the pattern to let
			// us anticipate what's coming.
			//
			String pic = xlate(pat);
			//
			// Reverse both picture pattern and source data.  This way
			// picture patterns with leading zzz,zzz.99 now become trailing
			// 99.zzz,zzz and can be handled more easily.
			//
			pic = reverse(pic);
			StringBuilder sBuf = new StringBuilder(sStr).reverse();
			String sRadix = mSymbols.radixSymbol;
			int nRadix = sBuf.indexOf(sRadix);
			//
			// If picture pattern contains a radix symbol (but not a vee),
			// and the value doesn't have a radix, then insert one.
			// Clearly, this is a hack, but I know no other way to get around
			// this problem -- accepting integral values in patterns with radix
			// pictures -- without re-architecting large chunks of this.
			//
			if (mbRadixSeen && ! mbVeeSeen && nRadix < 0) {
				char cZero = mSymbols.zeroDigit;
				for (int i = 0, n = sBuf.length(); i < n; ) {
					int j = i;
					char chr = sBuf.charAt(i++);
					if (cZero <= chr && chr <= cZero + 9) {
						sBuf.insert(j, sRadix);
						break;
					}
				}
			}
			String str = sBuf.toString();
			//
			// Reset the state of parsing flags.
			//
			mbDigitSeen = false;
			mbRadixSeen = false;
			mbExponSeen = false;
			mbLeftParenSeen = false;
			mbRightParenSeen = false;
			mbVeeSeen = false;
			mbCommaSeen = false;
			mbSignSeen = false;
			mbPercentSeen = false;
			mbNegative = false;
			//
			// Initialize finite state machine that will parse the pattern.
			//
			char prevChr = 0;
			int chrCnt = 0;
			boolean inQuoted = false;
			boolean inQuoteQuoted = false;
			StringBuilder sRes = new StringBuilder();
			//
			// Foreach each character of the pattern Do ...
			//
			int strPos = 0;
			int picLen = pic.length();
			int strLen = str.length();
			for (int i = 0; i < picLen; ) {
				char chr = pic.charAt(i++);
				boolean fw = (0xFF01 <= chr && chr <= 0xFF5E);
				//
				// If seen a quote within a quoted string ...
				//
				if (inQuoteQuoted) {
					if (chr == '\'') {     // cases like '...''
						if (! DateTimeUtil.matchChr(str, strPos, chr, fw))
							throw new ExFull();
						strPos += 1;
						chrCnt = 0;
					}
					else {                  // cases like '...'9
						inQuoted = false;
						chrCnt = 1;
						prevChr = chr;
					}
					inQuoteQuoted = false;
				}
				//
				// Elif within a quoted string ...
				//
				else if (inQuoted) {
					if (chr == '\'') {     // cases like '...'
						inQuoteQuoted = true;
					}
					else {                  // cases like '...9
						if (! DateTimeUtil.matchChr(str, strPos, chr, fw))
							throw new ExFull();
						strPos += 1;
					}
					chrCnt++;
				}
				//
				// Elif start of a quoted string ...
				//
				else if (chr == '\'') {
					if (chrCnt > 0) { // cases like 99'
						if (strPos >= strLen && isNonIgnorable(prevChr))
							throw new ExFull();
						if (chrCnt >= strLen - strPos)
							chrCnt = strLen - strPos;
						if (chrCnt > 0)
							strPos = subParse(str, strPos, prevChr,
																chrCnt, sRes);
						chrCnt = 0;
						prevChr = 0;
					}
					inQuoted = true;
				}
				//
				// Elif start of a metacharacter ...
				//
				else if (DateTimeUtil.matchChr(NUMERIC_PICTURE_SYMBOLS, chr)
				|| ('a' <= chr && chr <= 'z' || 'A' <= chr && chr <= 'Z')) {
					if (chr != prevChr) {
						if (chrCnt > 0) { // cases like 99Z
							if (strPos >= strLen && isNonIgnorable(prevChr))
								throw new ExFull();
							if (chrCnt >= strLen - strPos)
								chrCnt = strLen - strPos;
							if (chrCnt > 0)
								strPos = subParse(str, strPos, prevChr,
																chrCnt, sRes);
							chrCnt = 0;
						}
						prevChr = chr;
					}
					chrCnt++;
				}
				//
				// Elif start of a literal ...
				//
				else {
					if (chrCnt > 0) { // cases like 99-
						if (strPos >= strLen && isNonIgnorable(prevChr))
							throw new ExFull();
						if (chrCnt >= strLen - strPos)
							chrCnt = strLen - strPos;
						if (chrCnt > 0)
							strPos = subParse(str, strPos, prevChr,
																chrCnt, sRes);
						chrCnt = 0;
						prevChr = 0;
					}
					if (chr == '?') {
						if (strPos < strLen
								&& Character.isDefined(str.charAt(strPos)))
							strPos += 1;
					}
					else if (chr == '+') {
						if (strPos >= strLen
								|| ! Character.isWhitespace(str.charAt(strPos)))
							throw new ExFull();
						strPos += 1;
						while (strPos < strLen
								&& Character.isWhitespace(str.charAt(strPos)))
							strPos += 1;
					}
					else if (chr == '*') {
						while (strPos < strLen
								&& Character.isWhitespace(str.charAt(strPos)))
							strPos += 1;
					}
					else if (strPos < strLen && str.charAt(strPos) == chr) {
						strPos += 1;
					}
					else {
						throw new ExFull();
					}
				}
			}
			//
			// Ensure quoted string is terminated.
			//
			if (inQuoteQuoted)
				inQuoted = false;
			if (inQuoted)
				throw new ExFull();
			//
			// Parse any remaining items in the pattern.
			//
			if (prevChr > 0 && chrCnt > 0) {
				if (strPos >= strLen && isNonIgnorable(prevChr))
					throw new ExFull();
				if (chrCnt >= strLen - strPos)
					chrCnt = strLen - strPos;
				if (chrCnt > 0)
					strPos = subParse(str, strPos, prevChr, chrCnt, sRes);
				prevChr = 0;
			}
			//
			// Parse any remaining signs in the text.
			//
			if (! mbSignSeen) {
				if (strPos >= strLen && isNonIgnorable(prevChr))
					throw new ExFull();
				strPos = subParse(str, strPos, 's', 1, sRes);
			}
			//
			// Ensure there's no more source to parse.
			//
			if (strPos != strLen)
				throw new ExFull();
			//
			// Re-vert result.
			//
			sRes.reverse();
			//
			// Trim leading zeros.
			//
			int resLen = sRes.length();
			int i = 0;
			for (; i < resLen; i++) {
				if (sRes.charAt(i) != '0')
					break;
			}
			//
			// Watson fix 0670279: avoid prematurely trimming all leading zeros.
			//
			if (i < resLen)
				sRes.delete(0, i);
			else if (i > 0)
				sRes.delete(0, i - 1);
			//
			// Trim trailing zeros.
			//
			if (! mbExponSeen && mbRadixSeen && ! mbOnly8Seen) {
				i = sRes.length();
				while (i > 0 && sRes.charAt(i - 1) == '0') {
					i--;
				}
				sRes.setLength(i);
			}
			if (sRes.toString().equals("."))
				sRes.append('0');
			msText.setLength(0);
			if (sRes.length() != 0) {
				if (mbNegative)
					msText.append('-');
				msText.append(sRes);
			}
			mdValue = strToDbl(msText.toString(), 11);
			if (mbPercentSeen) {
				int nWidth = msText.length();
				int nPrec = 2;
				int nDot = msText.indexOf(".");
				if (nDot >= 0)
					nPrec += nWidth - nDot - 1;
				dblToStr(msText, mdValue / 100.0, nWidth, nPrec, 0);
			}
		} catch(ExFull e) {
			bRes = false;
		}
		return bRes;
	}

	/**
     * Parse the picture and return the number of leading and fractional digits 
	 * the picture implies.
	 * @param pic - a picture pattern string.
	 * @param lead - the number of lead digits.
	 * @param frac - the number of fractional digits.
     */
    public static void getSymbolCount(String pic, IntegerHolder lead, IntegerHolder frac) {
    	String sLoc = LcLocale.English_US;
    	String sZero = "0.0";
        LcNum oNum = new LcNum(sZero, sLoc);
        oNum.xlate(pic);
        lead.value = oNum.mnSignf;
        frac.value = oNum.mnInSignf;
    }


    final StringBuilder msText;	// The source text.

    final LcLocale mLocale;		// The locale.

    boolean mbValid;		// The validity of this object.

	double mdValue;			// The numeric value of this object.
	
	int mnExpon;
	
	int mnSignf;
	
	int mnInSignf;
	
	boolean mbNegative;
	
	boolean mbSignSeen;
	
	boolean mbLeftParenSeen;
	
	boolean mbRightParenSeen;
	
	boolean mbDigitSeen;
	
	boolean mbRadixSeen;
	
	boolean mbExponSeen;
	
	boolean mbVeeSeen;
	
	boolean mbCommaSeen;
	
	boolean mbOnlyZedSeen;
	
	boolean mbFracZedSeen;
	
	boolean mbOnly8Seen;
	
	boolean mbFracDigitSeen;
	
	boolean mbPercentSeen;
	
	boolean mbFracStartSeen;

	Symbols mSymbols;

	/*
	 * DecimalFormat objects are not thread-safe.  But
	 * to minimize the overhead of creating a new instance each
	 * time we format a number, keep a partially initialized
	 * instance that can be cloned each time its used.
	 */
	static final DecimalFormat gNumberFormat
			= (DecimalFormat) NumberFormat.getInstance(Locale.US);

    static final String gsNonIgnorable = "(%$.)BCDERSZ89";

    static final String gsCondIgnorable = "(%$.)BCDERS";

	static final String gsDB = "DB";

	static final String gsCR = "CR";

	static final String gsLP = "(";

	static final String gsRP = ")";

	static final String gsE = "E";

	static final String gsDSP = "  ";

	static final String gsSSP = " ";

	/*
	 * Translates a num(eric) pattern into something more easily
	 * handled, making the passing and formatting easier: turn multi-different
	 * character patterns like (DB, and CR) into single character patterns
	 * Ensure the pattern is well formed:
	 * 

	 *	
 	( ) are paired,
	 *	
	( ) enclosing all digits,
	 *	
	E is preceeded with digits,
	 *	
	there's but a single radix, and
	 *	
	literals are properly quoted.
	 * 
	 * In the process, flag:
	 * 

	 *	
	the number of significant digits,
	 *	
	LI>	the number of insignificant digits,
	 *	
	if the exponent pattern was seen,
	 *	
	if the VEE pattern was seen,
	 *	
	if any sign patterns were seen.
	 * 

	 * 
	 * @param pic
	 *         a numeric pattern.
	 * @return
	 *         the translated pattern.
	 * @throws
	 *         ExFull if the pattern is not valid.
	 */
	private String xlate(String pic) {
		//
		// Reset the state formatting flags.
		//
		mbFracStartSeen = false;
		mbFracDigitSeen = false;
		mbOnly8Seen = false;
		mbFracZedSeen = false;
		mbOnlyZedSeen = true;
		mbDigitSeen = false;
		mbRadixSeen = false;
		mbExponSeen = false;
		mbLeftParenSeen = false;
		mbRightParenSeen = false;
		mbVeeSeen = false;
		mbCommaSeen = false;
		mbSignSeen = false;
		mbPercentSeen = false;
		mnInSignf = 0;
		mnSignf = 0;
		//
		// Initialize finite state scanner. Only operate on previous
		// character when there's a "state" change triggered by the
		// current pattern character.
		//
		StringBuilder sRes = new StringBuilder();
		char prevChr = 0;
		int chrCnt = 0;
		boolean inQuoted = false;
		boolean inQuoteQuoted = false;
		//
		// Foreach each character of the pattern Do ...
		//
		int picLen = pic.length();
		for (int i = 0; i < picLen; ) {
			char chr = pic.charAt(i++);
			//
			// If seen a quote within a quoted string ...
			//
			if (inQuoteQuoted) {
				if (chr == '\'') {      // cases like '...''
					sRes.append(chr);
					chrCnt = 0;
				}
				else {                  // cases like '...'9
					inQuoted = false;
					chrCnt = 1;
					prevChr = chr;
				}
				inQuoteQuoted = false;
			}
			//
			// Elif within a quoted string ...
			//
			else if (inQuoted) {
				if (chr == '\'')        // cases like '...'
					inQuoteQuoted = true;
				sRes.append(chr);
				chrCnt = 0;
				prevChr = chr;
			}
			//
			// Elif start of a quoted string ...
			//
			else if (chr == '\'') {
				if (chrCnt > 0) {       // cases like ...9'
					sRes.append(subXlate(prevChr, chrCnt));
					chrCnt = 0;
					prevChr = 0;
				}
				sRes.append(chr);
				inQuoted = true;
			}
			//
			// Elif its a metacharacter ...
			//
			else if (DateTimeUtil.matchChr(NUMERIC_PICTURE_SYMBOLS, chr)
			|| ('a' <= chr && chr <= 'z' || 'A' <= chr && chr <= 'Z')) {
				if (prevChr != chr) {
					if (chrCnt == 1 && prevChr == 'D' && chr == 'B') {
						sRes.append('D');
						prevChr = 0;
						chrCnt = 0;
						mbSignSeen = true;
					}
					else if (chrCnt == 1 && prevChr == 'd' && chr == 'b') {
						sRes.append('d');
						prevChr = 0;
						chrCnt = 0;
						mbSignSeen = true;
					}
					else if (chrCnt == 1 && prevChr == 'C' && chr == 'R') {
						sRes.append('C');
						prevChr = 0;
						chrCnt = 0;
						mbSignSeen = true;
					}
					else if (chrCnt == 1 && prevChr == 'c' && chr == 'r') {
						sRes.append('c');
						prevChr = 0;
						chrCnt = 0;
						mbSignSeen = true;
					}
					else if (chrCnt > 0) {   // cases like ZZ9 or :9
						sRes.append(subXlate(prevChr, chrCnt));
						prevChr = chr;
						chrCnt = 1;
					}
					else {
						prevChr = chr;
						chrCnt++;
					}
				}
				else {
					chrCnt++;
				}
			}
			//
			// Elif start of a literal ...
			//
			else {
				if (chrCnt > 0) {      // cases like 99-
					sRes.append(subXlate(prevChr, chrCnt));
					chrCnt = 0;
				}
				prevChr = 0;
				sRes.append(chr);
			}
		}
		//
		// Ensure quoted string is terminated.
		//
		if (inQuoteQuoted)
			inQuoted = false;
		if (inQuoted)
			throw new ExFull();
		//
		// Format any remaining items in the pattern.
		//
		if (prevChr > 0 && chrCnt > 0)
			sRes.append(subXlate(prevChr, chrCnt));
		if (mbLeftParenSeen && mbDigitSeen && mbRightParenSeen)
			mbSignSeen = true;
		return sRes.toString();
	}


	/*
	 * Translates a sub-element of a numeric pattern given the number of
	 * occurances of a numeric pattern metacharacter.
	 *
	 * @param chr
	 *         a numeric pattern metacharacter.
	 * @param chrCnt
	 *         the number of consecutive occurances of the metacharacter.
	 * @return
	 *         the translated sub-element, or the empty string upon error.
	 * @throws
	 *         ExFull if sub-elements aren't translated in the proper
	 *         sequence.
	 */
	private String subXlate(char chr, int chrCnt) {
		StringBuilder sRes = new StringBuilder();
		for (int i = 0; i < chrCnt; i++)
			sRes.append(chr);
		//
		// Remap any fullwidth metasymbol back to ASCII.
		//
		if (0xFF01 <= chr && chr <= 0xFF5E) {
			chr -= 0xFFE0;
			chr &= 0x00FF;
		}
		if (chr == 'E') {
			if (chrCnt > 1 || mbExponSeen || ! mbDigitSeen)
				throw new ExFull();
			mbExponSeen = true;
		}
		else if (chr == '(') {
			if (chrCnt > 1 || mbLeftParenSeen
										|| mbDigitSeen || mbRightParenSeen)
				throw new ExFull();
			mbLeftParenSeen = true;
		}
		else if (chr == 'S' || chr == 's') {
			mbSignSeen = true;
		}
		else if (chr == '%') {
			mbPercentSeen = true;
		}
		else if (chr == '.' || chr == 'V' || chr == 'v') {
			if (chr == 'v' || chr == 'V') {
				if (chrCnt > 1 || mbVeeSeen)
					throw new ExFull();
				mbVeeSeen = true;
			}
			if (chrCnt > 1 || mbRadixSeen)
				throw new ExFull();
			mbRadixSeen = true;
			mbFracStartSeen = true;
			if (! mbDigitSeen)
				mbFracDigitSeen = true;
		}
		else if (chr == '8' || chr == '9' || chr == 'Z' || chr == 'z') {
			//
			// Watson fix 1226147 -- only presume we've seen only fractional
			// picture 'z' or only fractional picture '8' after we've seen a
			// radix picture -- the prior implementation presumed prematurely.
			//
			if (mbFracStartSeen) {
				mbFracStartSeen = false;
				mbFracZedSeen = true;
				mbOnly8Seen = true;
			}
			if (mbRightParenSeen)
				throw new ExFull();
			if (chr != 'z') {
				mbOnlyZedSeen = false;
				if (mbRadixSeen)
					mbFracZedSeen = false;
			}
			if (chr != '8')
				mbOnly8Seen = false;
			mbDigitSeen = true;
			if (mbRadixSeen)
				mnInSignf += chrCnt;
			else
				mnSignf += chrCnt;
		}
		else if (chr == ')') {
			if (chrCnt > 1 || ! mbLeftParenSeen
										|| ! mbDigitSeen || mbRightParenSeen)
				throw new ExFull();
			mbRightParenSeen = true;
		}
		return sRes.toString();
	}


	/*
	 * Formats a sub-element of a numeric pattern given the number of
	 * occurances of a numeric pattern metacharacter.
	 *
	 * @param chr
	 *         a numeric pattern metacharacter.
	 * @param chrCnt
	 *         the number of consecutive occurances of the metacharacter.
	 * @param txtIdx
	 *         an index into this object's text string.
	 * @param sRes
	 *         the formatted sub-element, or the empty upon error.
	 * @return
	 *         the index into this object's text string.
	 * @throws
	 *         ExFull if the numeric value overflowed the field.
	 */
	private int subFormat(char chr, int chrCnt, int txtIdx, StringBuilder sRes) {
		boolean fw = (0xFF01 <= chr && chr <= 0xFF5E);
		switch (chr) {
		case 0xFF19: // Fullwidth '9'.
		case '9': // Digit or zero if zero.
			if (mbNegative && ! mbDigitSeen && ! mbSignSeen) {
				sRes.append(DateTimeUtil.fmtStr(mSymbols.negativeSymbol, fw));
				mbSignSeen = true;
			}
			while (chrCnt-- > 0 && txtIdx < msText.length()) {
				char cValue = msText.charAt(txtIdx++);
				if ('0' > cValue || cValue > '9')
					throw new ExFull();
				int value = cValue - '0';
				sRes.append(DateTimeUtil.fmtNum(1, value,
													fw, mSymbols.zeroDigit));
				mbDigitSeen = true;
			}
			break;
		case 0xFF18: // Fullwidth '8'.
		case '8': // Digit or zero if zero.
			if (mbNegative && ! mbDigitSeen && ! mbSignSeen) {
				sRes.append(DateTimeUtil.fmtStr(mSymbols.negativeSymbol, fw));
				mbSignSeen = true;
			}
			while (chrCnt-- > 0 && txtIdx < msText.length()) {
				char cValue = msText.charAt(txtIdx++);
				if ('0' > cValue || cValue > '9')
					throw new ExFull();
				int value = cValue - '0';
				sRes.append(DateTimeUtil.fmtNum(1, value,
													fw, mSymbols.zeroDigit));
				mbDigitSeen = true;
			}
			break;
		case 0xFF3A: // Fullwidth 'Z'.
		case 'Z': // Digit or space if zero.
			if (mbNegative && ! mbDigitSeen && ! mbSignSeen) {
				sRes.append(DateTimeUtil.fmtStr(mSymbols.negativeSymbol, fw));
				mbSignSeen = true;
			}
			while (chrCnt-- > 0 && txtIdx < msText.length()) {
				char cValue = msText.charAt(txtIdx++);
				if ('0' > cValue || cValue > '9')
					throw new ExFull();
				int value = cValue - '0';
				if (mbDigitSeen || mbRadixSeen || value > 0) {
					sRes.append(DateTimeUtil.fmtNum(1, value,
													fw, mSymbols.zeroDigit));
					mbDigitSeen = true;
				}	
				else {
					sRes.append(DateTimeUtil.matchChr(' ', fw));
				}
			}
			break;
		case 0xFF5A: // Fullwidth 'z'.
		case 'z': // Digit or nothing if zero.
			if (mbNegative && ! mbDigitSeen && ! mbSignSeen) {
				sRes.append(DateTimeUtil.fmtStr(mSymbols.negativeSymbol, fw));
				mbSignSeen = true;
			}
			while (chrCnt-- > 0 && txtIdx < msText.length()) {
				char cValue = msText.charAt(txtIdx++);
				if ('0' > cValue || cValue > '9')
					throw new ExFull();
				int value = cValue - '0';
				boolean bFormatIt = false;
				if (mbRadixSeen) {
					int nSigf = StringUtils.skipUntil(msText.toString(),
														"123456789", txtIdx);
					if (nSigf + txtIdx < msText.length()) {
						bFormatIt = true;
					}
					else if (! mbDigitSeen && ! mbFracZedSeen) {
						bFormatIt = true;
					}
					else if (! mbFracZedSeen && value > 0) {
						bFormatIt = true;
					}
					else if (value > 0) {
						bFormatIt = true;
					}
				}
				else if (mbDigitSeen || value > 0) {
					if (! mbFracZedSeen || ! mbRadixSeen)
						bFormatIt = true;
				}	
				if (bFormatIt) {
					sRes.append(DateTimeUtil.fmtNum(1, value,
													fw, mSymbols.zeroDigit));
					mbDigitSeen = true;
				}
			}
			break;
		case 0xFF25: // Fullwidth 'E'.
		case 'E': // Exponent.
			if (! mbOnlyZedSeen) {
				sRes.append(DateTimeUtil.fmtStr(gsE, fw));
				int value = mnExpon;
				if (value < 0) {
					sRes.append(DateTimeUtil.matchChr('-', fw));
					value = - value;
				}
				else if (value > 0) {
					sRes.append(DateTimeUtil.matchChr('+', fw));
				}
				sRes.append(DateTimeUtil.fmtPlainNum(3, value,
													fw, mSymbols.zeroDigit));
			}
			break;
		case 'C': // CR symbol if negative and spaces if positive.
			while (chrCnt-- > 0) {
				if (! mbOnlyZedSeen)
					sRes.append((mbNegative) ? gsCR : gsDSP);
			}
			break;
		case 'c': // CR symbol if negative and nothing if positive.
			while (chrCnt-- > 0) {
				if (! mbOnlyZedSeen  && mbNegative)
					sRes.append(gsCR);
			}
			break;
		case 'D': // DB symbol if negative and spaces if positive.
			while (chrCnt-- > 0) {
				if (! mbOnlyZedSeen)
					sRes.append((mbNegative) ? gsDB : gsDSP);
			}
			break;
		case 'd': // DB symbol if negative and nothing if positive.
			while (chrCnt-- > 0) {
				if (! mbOnlyZedSeen && mbNegative)
					sRes.append(gsDB);
			}
			break;
		case 0xFF33: // Fullwidth 'S'.
		case 'S': // Minus sign if negative and a space if positive.
			while (chrCnt-- > 0) {
				if (! mbOnlyZedSeen)
					if (mbNegative)
						sRes.append(DateTimeUtil.fmtStr(
												mSymbols.negativeSymbol, fw));
					else
						sRes.append(DateTimeUtil.matchChr(' ', fw));
			}
			break;
		case 0xFF53: // Fullwidth 's'.
		case 's': // Minus sign if negative and nothing if positive.
			while (chrCnt-- > 0) {
				if (! mbOnlyZedSeen && mbNegative)
					sRes.append(DateTimeUtil.fmtStr(
												mSymbols.negativeSymbol, fw));
			}
			break;
		case 0xFF36: // Fullwidth 'V'.
		case 'V': // Implied decimal sign if parsing.
			while (chrCnt-- > 0) {
					if (msText.charAt(txtIdx++) != '.')
						throw new ExFull();
				if (! mbOnlyZedSeen)
					sRes.append(DateTimeUtil.fmtStr(mSymbols.radixSymbol, fw));
				mbRadixSeen = true;
			}
			break;
		case 0xFF56: // Fullwidth 'v'.
		case 'v': // Implied decimal sign.
			while (chrCnt-- > 0) {
				if (msText.charAt(txtIdx++) != '.')
					throw new ExFull();
				if (! mbOnlyZedSeen && mbExponSeen)
					sRes.append(DateTimeUtil.fmtStr(mSymbols.radixSymbol, fw));
				mbRadixSeen = true;
			}
			break;
		case 0xFF0E: // Fullwidth '.'.
		case '.': // Decimal radix.
			while (chrCnt-- > 0) {
				if (mbOnly8Seen) {
					char cValue = (txtIdx < msText.length()) ? msText.charAt(txtIdx++) : 0;
					if (cValue == '.')
						sRes.append(DateTimeUtil.fmtStr(
													mSymbols.radixSymbol, fw));
					//
					// Fixed Watson 1252639.  Ensure no other digits are
					// present in the absence of the radix.
					//
					else if ('0' <= cValue && cValue <= '9')
						throw new ExFull();
				}
				else {
					if (msText.charAt(txtIdx++) != '.')
						throw new ExFull();
					int nSigf = StringUtils.skipUntil(msText.toString(),
														"123456789", txtIdx);
					if (! mbFracZedSeen || nSigf + txtIdx < msText.length())
						sRes.append(DateTimeUtil.fmtStr(
													mSymbols.radixSymbol, fw));
				}
				mbRadixSeen = true;
			}
			break;
		case 0xFF0C: // Fullwidth ','.
		case ',': // Grouping separator.
			while (chrCnt-- > 0) {
				if (! mbOnlyZedSeen && mbDigitSeen)
					sRes.append(DateTimeUtil.fmtStr(
												mSymbols.groupingSymbol, fw));
				mbCommaSeen = true;
			}
			break;
		case 0xFF04: // Fullwidth '$'.
		case '$': // Currency name or symbol.
			while (chrCnt-- > 0) {
				if (! mbOnlyZedSeen) {
					if (chrCnt > 0) {
						chrCnt--;
						sRes.append(DateTimeUtil.fmtStr(
												mSymbols.currencyName, fw));
					}
					else
						sRes.append(DateTimeUtil.fmtStr(
												mSymbols.currencySymbol, fw));
				}
			}
			break;
		case 0xFF05: // Fullwidth '%'.
		case '%': // Percent symbol.
			while (chrCnt-- > 0) {
				if (! mbOnlyZedSeen)
					sRes.append(DateTimeUtil.fmtStr(
												mSymbols.percentSymbol, fw));
			}
			break;
		case 0xFF08: // Fullwidth '('.
		case 0xFF09: // Fullwidth ')'.
		case '(': // Left parenthesis.
		case ')': // Right parenthesis.
			while (chrCnt-- > 0) {
				if (! mbOnlyZedSeen)
					sRes.append(DateTimeUtil.matchChr((mbNegative)
															? chr : ' ', fw));
			}
			break;
		case 't': // tab.
			while (chrCnt-- > 0) {
				if (! mbOnlyZedSeen)
					sRes.append('\t');
			}
			break;
		default:
			if (! mbOnlyZedSeen)
				sRes.append(DateTimeUtil.matchChr(chr, fw));
			break;
		}
		return txtIdx;
	}

	/*
	 * Parses sa sub-element at a given position of the given string,
	 * given the number of occurances of a numeric pattern metacharacter.
	 *
	 * @param src
	 *         the text string to parse.
	 * @param srcPos
	 *         the starting parsing position within the text string.
	 * @param chr
	 *         a numeric pattern metacharacter.
	 * @param chrCnt
	 *         the number of consecutive occurances of the metacharacter.
	 * @param sRes
	 *         a string containing the text that was successfully parsed.
	 * @return
	 *         the ending parsing position within the text string
	 *         if successfully parsed.
	 * @throws
	 *         an ExFull if the text fails to parse.
	 */
	private int subParse(String src, int srcPos, char chr,
											int chrCnt, StringBuilder sRes) {
		assert(sRes != null);
		int n;
		int curPos = srcPos;
		String sSym;
		String sPos;
		String sNeg;
		boolean fw = (0xFF01 <= chr && chr <= 0xFF5E);
		switch (chr) {
		case 0xFF19: // Fullwidth '9'.
		case '9': // Digit or zero if empty or space.
			while (chrCnt-- > 0) {
				n = DateTimeUtil.matchNum(src, srcPos, srcPos + 1,
													fw, mSymbols.zeroDigit);
				if (n <= 0)
					throw new ExFull();
				if (mbCommaSeen)
					throw new ExFull();
				curPos = DateTimeUtil.incPos(src, srcPos, n);
				n =  DateTimeUtil.getNum(src, srcPos, curPos,
													fw, mSymbols.zeroDigit);
				sRes.append((char) ('0' + n));
				srcPos = curPos;
				mbDigitSeen = true;
			}
			break;
		case 0xFF3A: // Fullwidth 'Z'.
		case 'Z': // Digit or space if empty, a space or zero.
			sSym = gsSSP;
			if (sSym.length() > 1)
				sSym = reverse(sSym);
			while (chrCnt-- > 0) {
				n = DateTimeUtil.matchNum(src, srcPos, srcPos + 1,
													fw, mSymbols.zeroDigit);
				if (n == 1) {
					if (mbCommaSeen)
						throw new ExFull();
					curPos = DateTimeUtil.incPos(src, srcPos, n);
					n = DateTimeUtil.getNum(src, srcPos, curPos,
													fw, mSymbols.zeroDigit);
					sRes.append((char) ('0' + n));
					srcPos = curPos;
				}
				else if ((n = DateTimeUtil.matchStr(src, srcPos,
															sSym, fw)) > 0) {
					if (! mbRadixSeen)
						sRes.append('0');
					srcPos = n;
				}
				mbDigitSeen = true;
			}
			break;
		case 0xFF18: // Fullwidth '8'.
		case 0xFF5A: // Fullwidth 'z'.
		case '8':
		case 'z': // Digit or nothing if empty, a space or zero.
			while (chrCnt-- > 0) {
				n = DateTimeUtil.matchNum(src, srcPos, srcPos + 1,
													fw, mSymbols.zeroDigit);
				if (n == 1) {
					if (mbCommaSeen)
						throw new ExFull();
					curPos = DateTimeUtil.incPos(src, srcPos, n);
					n = DateTimeUtil.getNum(src, srcPos, curPos,
													fw, mSymbols.zeroDigit);
					sRes.append((char) ('0' + n));
					srcPos = curPos;
					mbDigitSeen = true;
				}
			}
			break;
		case 0xFF25: // Fullwidth 'E'.
		case 'E': // Exponent.
			while (chrCnt-- > 0) {
				if (mbExponSeen)
					throw new ExFull();
				//
				// Scan up to 3 decimal digit max for the exponent.
				//
				n = DateTimeUtil.matchNum(src, srcPos, srcPos + 3,
													fw, mSymbols.zeroDigit);
				if (n < 1 || 3 < n)
					throw new ExFull();
				for (int i = 0; i < n; i++) {	
					curPos = DateTimeUtil.incPos(src, srcPos, 1);
					int num = DateTimeUtil.getNum(src, srcPos, curPos,
													fw, mSymbols.zeroDigit);
					sRes.append((char) ('0' + num));
					srcPos = curPos;
				}
				if (DateTimeUtil.matchChr(src, srcPos, '+', fw)) {
					sRes.append('+');
					srcPos += 1;
				}
				else {
					if (DateTimeUtil.matchChr(src, srcPos, '-', fw)) {
						sRes.append('-');
						srcPos += 1;
					}
				}
				if (DateTimeUtil.matchChr(src, srcPos, 'E', fw)) {
					sRes.append('E'); 
					srcPos += 1;
				}
				else {
					if (DateTimeUtil.matchChr(src, srcPos, 'e', fw)) {
						sRes.append('E'); 
						srcPos += 1;
					}
					else 
						throw new ExFull();
				}
				mbExponSeen = true;
			}
			break;
		case 'C': // CR symbol if negative and spaces if positive.
			sNeg = gsCR;
			if (sNeg.length() > 1)
				sNeg = reverse(sNeg);
			sPos = gsDSP;
			if (sPos.length() > 1)
				sPos = reverse(sPos);
			while (chrCnt-- > 0) {
				if (mbSignSeen)
					throw new ExFull();
				if ((n = DateTimeUtil.matchStr(src, srcPos, sNeg, fw)) > 0) {
					srcPos = n;
					mbNegative = true;
				}
				else if ((n = DateTimeUtil.matchStr(src, srcPos,
															sPos, fw)) > 0) {
					srcPos = n;
				}
				mbSignSeen = true;
			}
			break;
		case 'c': // CR symbol if negative and nothing if positive.
			sPos = gsCR;
			if (sPos.length() > 1)
				sPos = reverse(sPos);
			while (chrCnt-- > 0) {
				if (mbSignSeen)
					throw new ExFull();
				if ((n = DateTimeUtil.matchStr(src, srcPos, sPos, fw)) > 0) {
					srcPos = n;
					mbNegative = true;
				}
				mbSignSeen = true;
			}
			break;
		case 'D': // DB symbol if negative and spaces if positive.
			sNeg = gsDB;
			if (sNeg.length() > 1)
				sNeg = reverse(sNeg);
			sPos = gsDSP;
			if (sPos.length() > 1)
				sPos = reverse(sPos);
			while (chrCnt-- > 0) {
				if (mbSignSeen)
					throw new ExFull();
				if ((n = DateTimeUtil.matchStr(src, srcPos, sNeg, fw)) > 0) {
					srcPos = n;
					mbNegative = true;
				}
				else if ((n = DateTimeUtil.matchStr(src, srcPos,
															sPos, fw)) > 0) {
					srcPos = n;
				}
				mbSignSeen = true;
			}
			break;
		case 'd': // DB symbol if negative and nothing if positive.
			sNeg = gsDB;
			if (sNeg.length() > 1)
				sNeg = reverse(sNeg);
			while (chrCnt-- > 0) {
				if (mbSignSeen)
					throw new ExFull();
				if ((n = DateTimeUtil.matchStr(src, srcPos, sNeg, fw)) > 0) {
					srcPos = n;
					mbNegative = true;
				}
				mbSignSeen = true;
			}
			break;
		case 0xFF33: // Fullwidth 'S'.
		case 'S': // Minus sign if negative and a space if positive.
			sSym = gsSSP;
			if (sSym.length() > 1)
				sSym = reverse(sSym);
			sNeg = mSymbols.negativeSymbol;
			if (sNeg.length() > 1)
				sNeg = reverse(sNeg);
			sPos = mSymbols.positiveSymbol;
			if (sPos.length() > 1)
				sPos = reverse(sPos);
			while (chrCnt-- > 0) {
				if (mbSignSeen)
					throw new ExFull();
				if ((n = DateTimeUtil.matchStr(src, srcPos, sNeg, fw)) > 0) {
					srcPos = n;
					mbNegative = true;
				}
				else if ((n = DateTimeUtil.matchStr(src, srcPos,
															sPos, fw)) > 0) {
					srcPos = n;
				}
				else if ((n = DateTimeUtil.matchStr(src, srcPos,
															sSym, fw)) > 0) {
					srcPos = n;
				}
				mbSignSeen = true;
			}
			break;
		case 0xFF53: // Fullwidth 's'.
		case 's': // Minus sign if negative and nothing if positive.
			sNeg = mSymbols.negativeSymbol;
			if (sNeg.length() > 1)
				sNeg = reverse(sNeg);
			sPos = mSymbols.positiveSymbol;
			if (sPos.length() > 1)
				sPos = reverse(sPos);
			while (chrCnt-- > 0) {
				if (mbSignSeen)
					throw new ExFull();
				if ((n = DateTimeUtil.matchStr(src, srcPos, sNeg, fw)) > 0) {
					srcPos = n;
					mbNegative = true;
				}
				else if ((n = DateTimeUtil.matchStr(src, srcPos,
															sPos, fw)) > 0) {
					srcPos = n;
				}
				mbSignSeen = true;
			}
			break;
		case 0xFF36: // Fullwidth 'V'.
		case 'V': // Implied decimal sign when parsing.
			sSym = mSymbols.radixSymbol;
			if (sSym.length() > 1)
				sSym = reverse(sSym);
			while (chrCnt-- > 0) {
				if (mbVeeSeen || mbRadixSeen)
					throw new ExFull();
				if ((n = DateTimeUtil.matchStr(src, srcPos, sSym, fw)) > 0)
					srcPos = n;
				sRes.append('.');
				mbVeeSeen = true;
				mbRadixSeen = true;
			}
			break;
		case 0xFF56: // Fullwidth 'v'.
		case 'v': // Implied decimal sign when parsing.
			sSym = mSymbols.radixSymbol;
			if (sSym.length() > 1)
				sSym = reverse(sSym);
			while (chrCnt-- > 0) {
				if (mbVeeSeen || mbRadixSeen)
					throw new ExFull();
				if ((n = DateTimeUtil.matchStr(src, srcPos, sSym, fw)) > 0)
					srcPos = n;
				sRes.append('.');
				mbVeeSeen = true;
				mbRadixSeen = true;
			}
			break;
		case 0xFF0E: // Fullwidth '.'.
		case '.': // Decimal radix.
			sSym = mSymbols.radixSymbol;
			if (sSym.length() > 1)
				sSym = reverse(sSym);
			while (chrCnt-- > 0) {
				if (mbRadixSeen)
					throw new ExFull();
				if ((n = DateTimeUtil.matchStr(src, srcPos, sSym, fw)) <= 0)
					throw new ExFull();
				srcPos = n;
				sRes.append('.');
				mbRadixSeen = true;
			}
			break;
		case 0xFF0C: // Fullwidth ','.
		case ',': // Grouping separator.
			sSym = mSymbols.groupingSymbol;
			if (sSym.length() > 1)
				sSym = reverse(sSym);
			sPos = gsSSP;
			if (sPos.length() > 1)
				sPos = reverse(sPos);
			while (chrCnt-- > 0) {
				if ((n = DateTimeUtil.matchStr(src, srcPos, sSym, fw)) > 0) {
					srcPos = n;
				}
				//
				// When parsing allow the equivalence of SP with NBSP,
				// but only when followed by a digit.  Watson fix 0670279.
				//
				else if (mSymbols.groupingSymbol.equals("\u00a0")) {
					if ((n = DateTimeUtil.matchStr(src, srcPos, sPos, fw)) > 0
					&& (n == src.length()
					|| DateTimeUtil.matchNum(src, n, n + 1,
												fw, mSymbols.zeroDigit) > 0))
						srcPos = n;
				}
				else
					mbCommaSeen = true;
			}
			break;
		case 0xFF04: // Fullwidth '$'.
		case '$': // Currency name or symbol.
			while (chrCnt-- > 0) {
				if (chrCnt > 0) {
					chrCnt--;
					sSym = mSymbols.currencyName;
				}
				else
					sSym = mSymbols.currencySymbol;
				if (sSym.length() > 1)
					sSym = reverse(sSym);
				if ((n = DateTimeUtil.matchStr(src, srcPos, sSym, fw)) <= 0)
					throw new ExFull();
				srcPos = n;
			}
			break;
		case 0xFF05: // Fullwidth '%'.
		case '%': // Percent symbol.
			sSym = mSymbols.percentSymbol;
			if (sSym.length() > 1)
				sSym = reverse(sSym);
			while (chrCnt-- > 0) {
				if ((n = DateTimeUtil.matchStr(src, srcPos, sSym, fw)) <= 0)
					throw new ExFull();
				srcPos = n;
				mbPercentSeen = true;
			}
			break;
		case 0xFF08: // Fullwidth '('.
		case '(': // Left parenthesis.
			sNeg = gsLP;
			if (sNeg.length() > 1)
				sNeg = reverse(sNeg);
			sPos = gsSSP;
			if (sPos.length() > 1)
				sPos = reverse(sPos);
			while (chrCnt-- > 0) {
				if (! mbRightParenSeen || ! mbDigitSeen || mbLeftParenSeen)
					throw new ExFull();
				if ((n = DateTimeUtil.matchStr(src, srcPos, sNeg, fw)) > 0) {
					srcPos = n;
					mbLeftParenSeen = true;
					mbNegative = true;
				}
				else {
					if ((n = DateTimeUtil.matchStr(src, srcPos, sPos, fw)) <= 0)
						throw new ExFull();
					srcPos = n;
					mbLeftParenSeen = true;
				}
			}
			break;
		case 0xFF09: // Fullwidth ')'.
		case ')': // Right parenthesis.
			sNeg = gsRP;
			if (sNeg.length() > 1)
				sNeg = reverse(sNeg);
			sPos = gsSSP;
			if (sPos.length() > 1)
				sPos = reverse(sPos);
			while (chrCnt-- > 0) {
				if (mbLeftParenSeen || mbDigitSeen || mbRightParenSeen)
					throw new ExFull();
				if ((n = DateTimeUtil.matchStr(src, srcPos, sNeg, fw)) > 0) {
					srcPos = n;
					mbRightParenSeen = true;
					mbNegative = true;
				}
				else {
					if ((n = DateTimeUtil.matchStr(src, srcPos, sPos, fw)) <= 0)
						throw new ExFull();
					srcPos = n;
					mbRightParenSeen = true;
				}
			}
			break;
		case 't': // tab
			while (chrCnt-- != 0) {
				if (src.charAt(srcPos) != '\t')
					throw new ExFull();
				srcPos += 1;
			}
			break;
		default:
			if (! DateTimeUtil.matchChr(src, srcPos, chr, fw))
				throw new ExFull();
			srcPos += 1;
			break;
		}
		return srcPos;
	}

	/*
	 * Determines if the given numeric pattern metacharacter
	 * is not ignorable in the current parsing context.
	 *
	 * @param chr
	 *         a numeric pattern metacharacter.
	 * @return
	 *         boolean true if its not, and false otherwise.
	 *
	 */
	private boolean isNonIgnorable(char chr) {
		if (mbCommaSeen)
			return DateTimeUtil.matchChr(gsNonIgnorable, chr);
		else
			return DateTimeUtil.matchChr(gsCondIgnorable, chr);
	}

	/*
	 * Reverses the given string's contents.
	 *
	 * @param str
	 *         a string.
	 * @return
	 *         the given string with every character reversed.
	 */
	private static String reverse(String str) {
		return  new StringBuilder(str).reverse().toString();
	}

	/*
	 * Converts a given double to a numeric string of the width and precision
	 * given.
	 *
	 * @param text
	 *         the string equivalent of the given double.
	 * @param dbl
	 *         a double.
	 * @param width
	 *         the required width.
	 * @param prec
	 *         the required precision.
	 * @param fmt
	 *         the required format where fmt == 0 requests zero padding, and,
	 *         fmt == 1 requests zero padding and radix termination.
	 * @return
	 *         Boolean true if the double can be converted to the given width
	 *         and precision, and false otherwise.
	 *         The numeric string returned in the text parameter.
	 */
	private static boolean dblToStr(StringBuilder text,
								double dbl, int width, int prec, int fmt) {
		assert(text != null);
		//
		// Convert the double to the required width and precision.
		//
		StringBuilder s = new StringBuilder();
		if (prec > MAX_PRECISION)
			prec = MAX_PRECISION;
		//
		// Emulate the
		//     sprintf(text, fmt == 1 ? "%0#*.*f" : "%0*.*f", width, prec, dbl)
		// behaviour using DecimalFormat class.
		//
		if (prec > 0) {
			for (int i = 2; i < width - prec; i++)
				s.append('0');
			s.append('0');
			s.append('.');
			for (int i = 0; i < prec; i++)
				s.append('0');
		}
		else {
			for (int i = 1; i < width; i++)
				s.append('0');
			s.append((fmt == 1) ? '.' : '0');
		}
		DecimalFormat oNumberFormat = (DecimalFormat) gNumberFormat.clone();
		oNumberFormat.applyPattern(s.toString());
		oNumberFormat.setDecimalSeparatorAlwaysShown(fmt == 1);
		text.setLength(0);
		text.append(oNumberFormat.format(dbl));
		return true;
	}

	/*
	 * Converts a given numeric string to a double in the precision given.
	 *
	 * @param text
	 *         a (locale-independent) numeric string.
	 * @param dbl
	 *         the numeric equivalent of the given numeric string.
	 * @param prec
	 *         the required precision.
	 * @return
	 *         the double value in the required precision.
	 * @throws
	 *         ExFull if the string is not numeric, exclusive of leading
	 *         and trailing whitespace.
	 */
	private static double strToDbl(String text, int prec) {
	    double dbl = 0.0;
		if (prec > MAX_PRECISION)
			prec = MAX_PRECISION;
		try {
			//
			// avoid ROUND_HALF_EVEN mode.
			//
			dbl = new BigDecimal(text).setScale(prec, BigDecimal.ROUND_HALF_UP).doubleValue();
		} catch (NumberFormatException e) {
			if (text.length() != 0)
				throw new ExFull();
		}
		return dbl;
	}

}