Package mf.org.apache.xerces.impl.dv.xs

Source Code of mf.org.apache.xerces.impl.dv.xs.AbstractDateTimeDV$DateTimeData

/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements.  See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License.  You may obtain a copy of the License at
*
*      http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

package mf.org.apache.xerces.impl.dv.xs;

import java.math.BigDecimal;

import mf.javax.xml.datatype.DatatypeFactory;
import mf.javax.xml.datatype.Duration;
import mf.javax.xml.datatype.XMLGregorianCalendar;

import mf.org.apache.xerces.impl.Constants;
import mf.org.apache.xerces.jaxp.datatype.DatatypeFactoryImpl;
import mf.org.apache.xerces.xs.datatypes.XSDateTime;


/**
* This is the base class of all date/time datatype validators.
* It implements common code for parsing, validating and comparing datatypes.
* Classes that extend this class, must implement parse() method.
*
* REVISIT: There are many instance variables, which would cause problems
*          when we support grammar caching. A grammar is possibly used by
*          two parser instances at the same time, then the same simple type
*          decl object can be used to validate two strings at the same time.
*          -SG
*         
* @xerces.internal
*
* @author Elena Litani
* @author Len Berman
* @author Gopal Sharma, SUN Microsystems Inc.
*
* @version $Id: AbstractDateTimeDV.java 965250 2010-07-18 16:04:58Z mrglavas $
*/
public abstract class AbstractDateTimeDV extends TypeValidator {
 
  //debugging
  private static final boolean DEBUG=false;
 
  //define shared variables for date/time
 
 
  //define constants to be used in assigning default values for
  //all date/time excluding duration
  protected final static int YEAR=2000;
  protected final static int MONTH=01;
  protected final static int DAY = 01;
   
    protected static final DatatypeFactory datatypeFactory = new DatatypeFactoryImpl();
 
  public short getAllowedFacets(){
    return ( XSSimpleTypeDecl.FACET_PATTERN | XSSimpleTypeDecl.FACET_WHITESPACE | XSSimpleTypeDecl.FACET_ENUMERATION |XSSimpleTypeDecl.FACET_MAXINCLUSIVE |XSSimpleTypeDecl.FACET_MININCLUSIVE | XSSimpleTypeDecl.FACET_MAXEXCLUSIVE  | XSSimpleTypeDecl.FACET_MINEXCLUSIVE  );
  }//getAllowedFacets()
 
 
  // distinguishes between identity and equality for date/time values
  // ie: two values representing the same "moment in time" but with different
  // remembered timezones are now equal but not identical.
  public boolean isIdentical (Object value1, Object value2) {
    if (!(value1 instanceof DateTimeData) || !(value2 instanceof DateTimeData)) {
      return false;
    }
   
    DateTimeData v1 = (DateTimeData)value1;
    DateTimeData v2 = (DateTimeData)value2;
   
    // original timezones must be the same in addition to date/time values
    // being 'equal'
    if ((v1.timezoneHr == v2.timezoneHr) && (v1.timezoneMin == v2.timezoneMin)) {
      return v1.equals(v2);
    }
   
    return false;
  }//isIdentical()
 
  // the parameters are in compiled form (from getActualValue)
  public int compare (Object value1, Object value2) {
    return compareDates(((DateTimeData)value1),
        ((DateTimeData)value2), true);
  }//compare()
 
  /**
   * Compare algorithm described in dateDime (3.2.7).
   * Duration datatype overwrites this method
   *
   * @param date1  normalized date representation of the first value
   * @param date2  normalized date representation of the second value
   * @param strict
   * @return less, greater, less_equal, greater_equal, equal
   */
  protected short compareDates(DateTimeData date1, DateTimeData date2, boolean strict) {
    if (date1.utc == date2.utc) {
      return compareOrder(date1, date2);
    }
    short c1, c2;
   
    DateTimeData tempDate = new DateTimeData(null, this);
   
    if ( date1.utc=='Z' ) {
     
      //compare date1<=date1<=(date2 with time zone -14)
      //
      cloneDate(date2, tempDate); //clones date1 value to global temporary storage: fTempDate
      tempDate.timezoneHr=14;
      tempDate.timezoneMin = 0;
      tempDate.utc='+';
      normalize(tempDate);
      c1 = compareOrder(date1, tempDate);
      if (c1 == LESS_THAN)
        return c1;
     
      //compare date1>=(date2 with time zone +14)
      //
      cloneDate(date2, tempDate); //clones date1 value to global temporary storage: tempDate
      tempDate.timezoneHr = -14;
      tempDate.timezoneMin = 0;
      tempDate.utc='-';
      normalize(tempDate);
      c2 = compareOrder(date1, tempDate);
      if (c2 == GREATER_THAN)
        return c2;
     
      return INDETERMINATE;
    }
    else if ( date2.utc=='Z' ) {
     
      //compare (date1 with time zone -14)<=date2
      //
      cloneDate(date1, tempDate); //clones date1 value to global temporary storage: tempDate
      tempDate.timezoneHr = -14;
      tempDate.timezoneMin = 0;
      tempDate.utc='-';
      if (DEBUG) {
        System.out.println("tempDate=" + dateToString(tempDate));
      }
      normalize(tempDate);
      c1 = compareOrder(tempDate, date2);
      if (DEBUG) {
        System.out.println("date=" + dateToString(date2));
        System.out.println("tempDate=" + dateToString(tempDate));
      }
      if (c1 == LESS_THAN)
        return c1;
     
      //compare (date1 with time zone +14)<=date2
      //
      cloneDate(date1, tempDate); //clones date1 value to global temporary storage: tempDate
      tempDate.timezoneHr = 14;
      tempDate.timezoneMin = 0;
      tempDate.utc='+';
      normalize(tempDate);
      c2 = compareOrder(tempDate, date2);
      if (DEBUG) {
        System.out.println("tempDate=" + dateToString(tempDate));
      }
      if (c2 == GREATER_THAN)
        return c2;
     
      return INDETERMINATE;
    }
    return INDETERMINATE;
   
  }
 
  /**
   * Given normalized values, determines order-relation
   * between give date/time objects.
   *
   * @param date1  date/time object
   * @param date2  date/time object
   * @return 0 if date1 and date2 are equal, a value less than 0 if date1 is less than date2, a value greater than 0 if date1 is greater than date2
   */
  protected short compareOrder(DateTimeData date1, DateTimeData date2) {
    if(date1.position < 1) {
      if (date1.year < date2.year)
        return -1;
      if (date1.year > date2.year)
        return 1;
    }
    if(date1.position < 2) {
      if (date1.month < date2.month)
        return -1;
      if (date1.month > date2.month)
        return 1;
    }
    if (date1.day < date2.day)
      return -1;
    if (date1.day > date2.day)
      return 1;
    if (date1.hour < date2.hour)
      return -1;
    if (date1.hour > date2.hour)
      return 1;
    if (date1.minute < date2.minute)
      return -1;
    if (date1.minute > date2.minute)
      return 1;
    if (date1.second < date2.second)
      return -1;
    if (date1.second > date2.second)
      return 1;
    if (date1.utc < date2.utc)
      return -1;
    if (date1.utc > date2.utc)
      return 1;
    return 0;
  }
 
  /**
   * Parses time hh:mm:ss.sss and time zone if any
   *
   * @param start
   * @param end
   * @param data
   * @exception RuntimeException
   */
  protected  void getTime (String buffer, int start, int end, DateTimeData data) throws RuntimeException{
   
    int stop = start+2;
   
    //get hours (hh)
    data.hour=parseInt(buffer, start,stop);
   
    //get minutes (mm)
   
    if (buffer.charAt(stop++)!=':') {
      throw new RuntimeException("Error in parsing time zone" );
    }
    start = stop;
    stop = stop+2;
    data.minute=parseInt(buffer, start,stop);
   
    //get seconds (ss)
    if (buffer.charAt(stop++)!=':') {
      throw new RuntimeException("Error in parsing time zone" );
    }
   
    //find UTC sign if any
    int sign = findUTCSign(buffer, start, end);
   
    //get seconds (ms)
    start = stop;
    stop = sign < 0 ? end : sign;
    data.second = parseSecond(buffer, start, stop);
   
    //parse UTC time zone (hh:mm)
    if (sign > 0) {
      getTimeZone(buffer, data, sign, end);
    }
  }
 
  /**
   * Parses date CCYY-MM-DD
   *
   * @param buffer
   * @param start start position
   * @param end end position
   * @param date
   * @exception RuntimeException
   */
  protected int getDate (String buffer, int start, int end, DateTimeData date) throws RuntimeException{
   
    start = getYearMonth(buffer, start, end, date);
   
    if (buffer.charAt(start++) !='-') {
      throw new RuntimeException("CCYY-MM must be followed by '-' sign");
    }
    int stop = start + 2;
    date.day=parseInt(buffer, start, stop);
    return stop;
  }
 
  /**
   * Parses date CCYY-MM
   *
   * @param buffer
   * @param start start position
   * @param end end position
   * @param date
   * @exception RuntimeException
   */
  protected int getYearMonth (String buffer, int start, int end, DateTimeData date) throws RuntimeException{
   
    if ( buffer.charAt(0)=='-' ) {
      // REVISIT: date starts with preceding '-' sign
      //          do we have to do anything with it?
      //
      start++;
    }
    int i = indexOf(buffer, start, end, '-');
    if ( i==-1 ) throw new RuntimeException("Year separator is missing or misplaced");
    int length = i-start;
    if (length<4) {
      throw new RuntimeException("Year must have 'CCYY' format");
    }
    else if (length > 4 && buffer.charAt(start)=='0'){
      throw new RuntimeException("Leading zeros are required if the year value would otherwise have fewer than four digits; otherwise they are forbidden");
    }
    date.year= parseIntYear(buffer, i);
    if (buffer.charAt(i)!='-') {
      throw new RuntimeException("CCYY must be followed by '-' sign");
    }
    start = ++i;
    i = start +2;
    date.month=parseInt(buffer, start, i);
    return i; //fStart points right after the MONTH
  }
 
  /**
   * Shared code from Date and YearMonth datatypes.
   * Finds if time zone sign is present
   *
   * @param end
   * @param date
   * @exception RuntimeException
   */
  protected void parseTimeZone (String buffer, int start, int end, DateTimeData date) throws RuntimeException{
   
    //fStart points right after the date
   
    if ( start < end ) {
      if (!isNextCharUTCSign(buffer, start, end)) {
        throw new RuntimeException ("Error in month parsing");
      }
      else {
        getTimeZone(buffer, date, start, end);
      }
    }
  }
 
  /**
   * Parses time zone: 'Z' or {+,-} followed by  hh:mm
   *
   * @param data
   * @param sign
   * @exception RuntimeException
   */
  protected void getTimeZone (String buffer, DateTimeData data, int sign, int end) throws RuntimeException{
    data.utc=buffer.charAt(sign);
   
    if ( buffer.charAt(sign) == 'Z' ) {
      if (end>(++sign)) {
        throw new RuntimeException("Error in parsing time zone");
      }
      return;
    }
    if ( sign<=(end-6) ) {
     
      int negate = buffer.charAt(sign) == '-'?-1:1;
      //parse hr
      int stop = ++sign+2;
      data.timezoneHr = negate*parseInt(buffer, sign, stop);
      if (buffer.charAt(stop++)!=':') {
        throw new RuntimeException("Error in parsing time zone" );
      }
     
      //parse min
      data.timezoneMin = negate*parseInt(buffer, stop, stop+2);
     
      if ( stop+2!=end ) {
        throw new RuntimeException("Error in parsing time zone");
      }
            if(data.timezoneHr != 0 || data.timezoneMin != 0)
                data.normalized = false;
    }
    else {
      throw new RuntimeException("Error in parsing time zone");
    }
    if ( DEBUG ) {
      System.out.println("time[hh]="+data.timezoneHr + " time[mm]=" +data.timezoneMin);
    }
  }
 
  /**
   * Computes index of given char within StringBuffer
   *
   * @param start
   * @param end
   * @param ch     character to look for in StringBuffer
   * @return index of ch within StringBuffer
   */
  protected  int indexOf (String buffer, int start, int end, char ch) {
    for ( int i=start;i<end;i++ ) {
      if ( buffer.charAt(i) == ch ) {
        return i;
      }
    }
    return -1;
  }
 
  /**
   * Validates given date/time object accoring to W3C PR Schema
   * [D.1 ISO 8601 Conventions]
   *
   * @param data
   */
  protected void validateDateTime (DateTimeData data) {
   
    //REVISIT: should we throw an exception for not valid dates
    //          or reporting an error message should be sufficient?
   
    /**
     * XML Schema 1.1 - RQ-123: Allow year 0000 in date related types.
     */
    if (!Constants.SCHEMA_1_1_SUPPORT && data.year==0 ) {
      throw new RuntimeException("The year \"0000\" is an illegal year value");
     
    }
   
    if ( data.month<1 || data.month>12 ) {
      throw new RuntimeException("The month must have values 1 to 12");
     
    }
   
    //validate days
    if ( data.day>maxDayInMonthFor(data.year, data.month) || data.day<1 ) {
      throw new RuntimeException("The day must have values 1 to 31");
    }
   
    //validate hours
    if ( data.hour>23 || data.hour<0 ) {
      if (data.hour == 24 && data.minute == 0 && data.second == 0) {
        data.hour = 0;
        if (++data.day > maxDayInMonthFor(data.year, data.month)) {
          data.day = 1;
          if (++data.month > 12) {
            data.month = 1;
            if (Constants.SCHEMA_1_1_SUPPORT) {
              ++data.year;
            }
            else if (++data.year == 0) {
              data.year = 1;
            }
          }
        }
      }
      else {
        throw new RuntimeException("Hour must have values 0-23, unless 24:00:00");
      }
    }
   
    //validate
    if ( data.minute>59 || data.minute<0 ) {
      throw new RuntimeException("Minute must have values 0-59");
    }
   
    //validate
    if ( data.second>=60 || data.second<0 ) {
      throw new RuntimeException("Second must have values 0-59");
     
    }
   
    //validate
    if ( data.timezoneHr>14 || data.timezoneHr<-14 ) {
      throw new RuntimeException("Time zone should have range -14:00 to +14:00");
    }
    else {
      if((data.timezoneHr == 14 || data.timezoneHr == -14) && data.timezoneMin != 0)
        throw new RuntimeException("Time zone should have range -14:00 to +14:00");
      else if(data.timezoneMin > 59 || data.timezoneMin < -59)
        throw new RuntimeException("Minute must have values 0-59");
    }
   
  }
 
  /**
   * Return index of UTC char: 'Z', '+', '-'
   *
   * @param start
   * @param end
   * @return index of the UTC character that was found
   */
  protected int findUTCSign (String buffer, int start, int end) {
    int c;
    for ( int i=start;i<end;i++ ) {
      c=buffer.charAt(i);
      if ( c == 'Z' || c=='+' || c=='-' ) {
        return i;
      }
     
    }
    return -1;
  }
   
    /**
     * Returns <code>true</code> if the character at start is 'Z', '+' or '-'.
     */
    protected final boolean isNextCharUTCSign(String buffer, int start, int end) {
        if (start < end) {
            char c = buffer.charAt(start);
            return (c == 'Z' || c == '+' || c == '-');
        }
        return false;
    }
 
  /**
   * Given start and end position, parses string value
   *
   * @param buffer string to parse
   * @param start  start position
   * @param end    end position
   * @return  return integer representation of characters
   */
  protected  int parseInt (String buffer, int start, int end)
  throws NumberFormatException{
    //REVISIT: more testing on this parsing needs to be done.
    int radix=10;
    int result = 0;
    int digit=0;
    int limit = -Integer.MAX_VALUE;
    int multmin = limit / radix;
    int i = start;
    do {
      digit = getDigit(buffer.charAt(i));
      if ( digit < 0 ) throw new NumberFormatException("'" + buffer + "' has wrong format");
      if ( result < multmin ) throw new NumberFormatException("'" + buffer + "' has wrong format");
      result *= radix;
      if ( result < limit + digit ) throw new NumberFormatException("'" + buffer + "' has wrong format");
      result -= digit;
     
    }while ( ++i < end );
    return -result;
  }
 
  // parse Year differently to support negative value.
  protected int parseIntYear (String buffer, int end){
    int radix=10;
    int result = 0;
    boolean negative = false;
    int i=0;
    int limit;
    int multmin;
    int digit=0;
   
    if (buffer.charAt(0) == '-'){
      negative = true;
      limit = Integer.MIN_VALUE;
      i++;
     
    }
    else{
      limit = -Integer.MAX_VALUE;
    }
    multmin = limit / radix;
    while (i < end)
    {
      digit = getDigit(buffer.charAt(i++));
      if (digit < 0) throw new NumberFormatException("'" + buffer + "' has wrong format");
      if (result < multmin) throw new NumberFormatException("'" + buffer + "' has wrong format");
      result *= radix;
      if (result < limit + digit) throw new NumberFormatException("'" + buffer + "' has wrong format");
      result -= digit;
    }
   
    if (negative)
    {
      if (i > 1) return result;
      else throw new NumberFormatException("'" + buffer + "' has wrong format");
    }
    return -result;
   
  }
 
  /**
   * If timezone present - normalize dateTime  [E Adding durations to dateTimes]
   *
   * @param date   CCYY-MM-DDThh:mm:ss+03
   */
  protected void normalize(DateTimeData date) {
   
    // REVISIT: we have common code in addDuration() for durations
    //          should consider reorganizing it.
    //
   
    //add minutes (from time zone)
    int negate = -1;
   
    if ( DEBUG ) {
      System.out.println("==>date.minute"+date.minute);
      System.out.println("==>date.timezoneMin" +date.timezoneMin);
    }
    int temp = date.minute + negate * date.timezoneMin;
    int carry = fQuotient (temp, 60);
    date.minute= mod(temp, 60, carry);
   
    if ( DEBUG ) {
      System.out.println("==>carry: " + carry);
    }
    //add hours
    temp = date.hour + negate * date.timezoneHr + carry;
    carry = fQuotient(temp, 24);
    date.hour=mod(temp, 24, carry);
    if ( DEBUG ) {
      System.out.println("==>date.hour"+date.hour);
      System.out.println("==>carry: " + carry);
    }
   
    date.day=date.day+carry;
   
    while ( true ) {
      temp=maxDayInMonthFor(date.year, date.month);
      if (date.day<1) {
        date.day = date.day + maxDayInMonthFor(date.year, date.month-1);
        carry=-1;
      }
      else if ( date.day>temp ) {
        date.day=date.day-temp;
        carry=1;
      }
      else {
        break;
      }
      temp=date.month+carry;
      date.month=modulo(temp, 1, 13);
      date.year=date.year+fQuotient(temp, 1, 13);
            if(date.year == 0 && !Constants.SCHEMA_1_1_SUPPORT) {
                date.year = (date.timezoneHr < 0 || date.timezoneMin < 0)?1:-1;
            }
    }
    date.utc='Z';
  }
 
 
  /**
     * @param date
     */
    protected void saveUnnormalized(DateTimeData date) {
        date.unNormYear = date.year;
        date.unNormMonth = date.month;
        date.unNormDay = date.day;
        date.unNormHour = date.hour;
        date.unNormMinute = date.minute;
        date.unNormSecond = date.second;
    }

    /**
   * Resets object representation of date/time
   *
   * @param data   date/time object
   */
  protected void resetDateObj(DateTimeData data) {
    data.year = 0;
    data.month = 0;
    data.day = 0;
    data.hour = 0;
    data.minute = 0;
    data.second = 0;
    data.utc = 0;
    data.timezoneHr = 0;
    data.timezoneMin = 0;
  }
 
  /**
   * Given {year,month} computes maximum
   * number of days for given month
   *
   * @param year
   * @param month
   * @return integer containg the number of days in a given month
   */
  protected int maxDayInMonthFor(int year, int month) {
    //validate days
    if ( month==4 || month==6 || month==9 || month==11 ) {
      return 30;
    }
    else if ( month==2 ) {
      if ( isLeapYear(year) ) {
        return 29;
      }
      else {
        return 28;
      }
    }
    else {
      return 31;
    }
  }
 
  private boolean isLeapYear(int year) {
   
    //REVISIT: should we take care about Julian calendar?
    return((year%4 == 0) && ((year%100 != 0) || (year%400 == 0)));
  }
 
  //
  // help function described in W3C PR Schema [E Adding durations to dateTimes]
  //
  protected int mod (int a, int b, int quotient) {
    //modulo(a, b) = a - fQuotient(a,b)*b
    return (a - quotient*b) ;
  }
 
  //
  // help function described in W3C PR Schema [E Adding durations to dateTimes]
  //
  protected int fQuotient (int a, int b) {
   
    //fQuotient(a, b) = the greatest integer less than or equal to a/b
    return (int)Math.floor((float)a/b);
  }
 
  //
  // help function described in W3C PR Schema [E Adding durations to dateTimes]
  //
  protected int modulo (int temp, int low, int high) {
    //modulo(a - low, high - low) + low
    int a = temp - low;
    int b = high - low;
    return (mod (a, b, fQuotient(a, b)) + low) ;
  }
 
  //
  // help function described in W3C PR Schema [E Adding durations to dateTimes]
  //
  protected int fQuotient (int temp, int low, int high) {
    //fQuotient(a - low, high - low)
   
    return fQuotient(temp - low, high - low);
  }
 
 
  protected String dateToString(DateTimeData date) {
    StringBuffer message = new StringBuffer(25);
    append(message, date.year, 4);
    message.append('-');
    append(message, date.month, 2);
    message.append('-');
    append(message, date.day, 2);
    message.append('T');
    append(message, date.hour, 2);
    message.append(':');
    append(message, date.minute, 2);
    message.append(':');
    append(message, date.second);
    append(message, (char)date.utc, 0);
    return message.toString();
  }
 
  protected final void append(StringBuffer message, int value, int nch) {
        if (value == Integer.MIN_VALUE) {
            message.append(value);
            return;
        }
    if (value < 0) {
      message.append('-');
      value = -value;
    }
    if (nch == 4) {
      if (value < 10)
        message.append("000");
      else if (value < 100)
        message.append("00");
      else if (value < 1000)
        message.append('0');
      message.append(value);
    }
    else if (nch == 2) {
      if (value < 10)
        message.append('0');
      message.append(value);
    }
    else {
      if (value != 0)
        message.append((char)value);
    }
  }
 
  protected final void append(StringBuffer message, double value) {
      if (value < 0) {
          message.append('-');
          value = -value;
      }
      if (value < 10) {
          message.append('0');
      }
      append2(message, value);
  }
   
    protected final void append2(StringBuffer message, double value) {
        final int intValue = (int) value;
        if (value == intValue) {
            message.append(intValue);
        }
        else {
            append3(message, value);
        }
    }
   
    private void append3(StringBuffer message, double value) {
        String d = String.valueOf(value);
        int eIndex = d.indexOf('E');
        if (eIndex == -1) {
            message.append(d);
            return;
        }
        int exp;
        if (value < 1) {
            // Need to convert from scientific notation of the form
            // n.nnn...E-N (N >= 4) to a normal decimal value.
            try {
                exp = parseInt(d, eIndex+2, d.length());
            }
            // This should never happen.
            // It's only possible if String.valueOf(double) is broken.
            catch (Exception e) {
                message.append(d);
                return;
            }
            message.append("0.");
            for (int i = 1; i < exp; ++i) {
                message.append('0');
            }
            // Remove trailing zeros.
            int end = eIndex - 1;
            while (end > 0) {
                char c = d.charAt(end);
                if (c != '0') {
                    break;
                }
                --end;
            }
            // Now append the digits to the end. Skip over the decimal point.
            for (int i = 0; i <= end; ++i) {
                char c = d.charAt(i);
                if (c != '.') {
                    message.append(c);
                }
            }
        }
        else {
            // Need to convert from scientific notation of the form
            // n.nnn...EN (N >= 7) to a normal decimal value.
            try {
                exp = parseInt(d, eIndex+1, d.length());
            }
            // This should never happen.
            // It's only possible if String.valueOf(double) is broken.
            catch (Exception e) {
                message.append(d);
                return;
            }
            final int integerEnd = exp + 2;
            for (int i = 0; i < eIndex; ++i) {
                char c = d.charAt(i);
                if (c != '.') {
                    if (i == integerEnd) {
                        message.append('.');
                    }
                    message.append(c);
                }
            }
            // Append trailing zeroes if necessary.
            for (int i = integerEnd - eIndex; i > 0; --i) {
                message.append('0');
            }
        }
    }
 
  protected double parseSecond(String buffer, int start, int end)
  throws NumberFormatException {
    int dot = -1;
    for (int i = start; i < end; i++) {
      char ch = buffer.charAt(i);
      if (ch == '.')
        dot = i;
      else if (ch > '9' || ch < '0')
        throw new NumberFormatException("'" + buffer + "' has wrong format");
    }
    if (dot == -1) {
      if (start+2 != end)
        throw new NumberFormatException("'" + buffer + "' has wrong format");
    }
    else if (start+2 != dot || dot+1 == end) {
      throw new NumberFormatException("'" + buffer + "' has wrong format");
    }
    return Double.parseDouble(buffer.substring(start, end));
  }
 
  //
  //Private help functions
  //
 
  private void cloneDate (DateTimeData finalValue, DateTimeData tempDate) {
    tempDate.year = finalValue.year;
    tempDate.month = finalValue.month;
    tempDate.day = finalValue.day;
    tempDate.hour = finalValue.hour;
    tempDate.minute = finalValue.minute;
    tempDate.second = finalValue.second;
    tempDate.utc = finalValue.utc;
    tempDate.timezoneHr = finalValue.timezoneHr;
    tempDate.timezoneMin = finalValue.timezoneMin;
  }
 
  /**
   * Represents date time data
   */
  static final class DateTimeData implements XSDateTime {
    int year, month, day, hour, minute, utc;
    double second;
    int timezoneHr, timezoneMin;
        private String originalValue;
        boolean normalized = true;
       
        int unNormYear;
        int unNormMonth;
        int unNormDay;
        int unNormHour;
        int unNormMinute;
        double unNormSecond;
   
    // used for comparisons - to decide the 'interesting' portions of
    // a date/time based data type.
    int position;
    // a pointer to the type that was used go generate this data
    // note that this is not the actual simple type, but one of the
    // statically created XXXDV objects, so this won't cause any GC problem.
    final AbstractDateTimeDV type;
    private String canonical;
    public DateTimeData(String originalValue, AbstractDateTimeDV type) {
            this.originalValue = originalValue;
      this.type = type;
    }
    public DateTimeData(int year, int month, int day, int hour, int minute,
        double second, int utc, String originalValue, boolean normalized, AbstractDateTimeDV type) {
      this.year = year;
      this.month = month;
      this.day = day;
      this.hour = hour;
      this.minute = minute;
      this.second = second;
      this.utc = utc;
      this.type = type;
            this.originalValue = originalValue;
    }
    public boolean equals(Object obj) {
      if (!(obj instanceof DateTimeData))
        return false;
      return type.compareDates(this, (DateTimeData)obj, true)==0;
    }
    public synchronized String toString() {
      if (canonical == null) {
        canonical = type.dateToString(this);
      }
      return canonical;
    }
    /* (non-Javadoc)
     * @see org.apache.xerces.xs.datatypes.XSDateTime#getYear()
     */
    public int getYears() {
            if(type instanceof DurationDV)
                return 0;
      return normalized?year:unNormYear;
    }
    /* (non-Javadoc)
     * @see org.apache.xerces.xs.datatypes.XSDateTime#getMonth()
     */
    public int getMonths() {
            if(type instanceof DurationDV) {
                return year*12 + month;
            }
      return normalized?month:unNormMonth;
    }
    /* (non-Javadoc)
     * @see org.apache.xerces.xs.datatypes.XSDateTime#getDay()
     */
    public int getDays() {
            if(type instanceof DurationDV)
                return 0;
      return normalized?day:unNormDay;
    }
    /* (non-Javadoc)
     * @see org.apache.xerces.xs.datatypes.XSDateTime#getHour()
     */
    public int getHours() {
            if(type instanceof DurationDV)
                return 0;
      return normalized?hour:unNormHour;
    }
    /* (non-Javadoc)
     * @see org.apache.xerces.xs.datatypes.XSDateTime#getMinutes()
     */
    public int getMinutes() {
            if(type instanceof DurationDV)
                return 0;
      return normalized?minute:unNormMinute;
    }
    /* (non-Javadoc)
     * @see org.apache.xerces.xs.datatypes.XSDateTime#getSeconds()
     */
    public double getSeconds() {
            if(type instanceof DurationDV) {
                return day*24*60*60 + hour*60*60 + minute*60 + second;
            }
      return normalized?second:unNormSecond;
    }
    /* (non-Javadoc)
     * @see org.apache.xerces.xs.datatypes.XSDateTime#hasTimeZone()
     */
    public boolean hasTimeZone() {
      return utc != 0;
    }
    /* (non-Javadoc)
     * @see org.apache.xerces.xs.datatypes.XSDateTime#getTimeZoneHours()
     */
    public int getTimeZoneHours() {
      return timezoneHr;
    }
    /* (non-Javadoc)
     * @see org.apache.xerces.xs.datatypes.XSDateTime#getTimeZoneMinutes()
     */
    public int getTimeZoneMinutes() {
      return timezoneMin;
    }
        /* (non-Javadoc)
         * @see org.apache.xerces.xs.datatypes.XSDateTime#getLexicalValue()
         */
        public String getLexicalValue() {
            return originalValue;
        }
        /* (non-Javadoc)
         * @see org.apache.xerces.xs.datatypes.XSDateTime#normalize()
         */
        public XSDateTime normalize() {
            if(!normalized) {
                DateTimeData dt = (DateTimeData)this.clone();
                dt.normalized = true;
                return dt;
            }
            return this;
        }
        /* (non-Javadoc)
         * @see org.apache.xerces.xs.datatypes.XSDateTime#isNormalized()
         */
        public boolean isNormalized() {
            return normalized;
        }
       
        public Object clone() {
            DateTimeData dt = new DateTimeData(this.year, this.month, this.day, this.hour,
                        this.minute, this.second, this.utc, this.originalValue, this.normalized, this.type);
            dt.canonical = this.canonical;
            dt.position = position;
            dt.timezoneHr = this.timezoneHr;
            dt.timezoneMin = this.timezoneMin;
            dt.unNormYear = this.unNormYear;
            dt.unNormMonth = this.unNormMonth;
            dt.unNormDay = this.unNormDay;
            dt.unNormHour = this.unNormHour;
            dt.unNormMinute = this.unNormMinute;
            dt.unNormSecond = this.unNormSecond;
            return dt;
        }
       
        /* (non-Javadoc)
         * @see org.apache.xerces.xs.datatypes.XSDateTime#getXMLGregorianCalendar()
         */
        public XMLGregorianCalendar getXMLGregorianCalendar() {
            return type.getXMLGregorianCalendar(this);
        }
        /* (non-Javadoc)
         * @see org.apache.xerces.xs.datatypes.XSDateTime#getDuration()
         */
        public Duration getDuration() {
            return type.getDuration(this);
        }
  }

    protected XMLGregorianCalendar getXMLGregorianCalendar(DateTimeData data) {
        return null;
    }

    protected Duration getDuration(DateTimeData data) {
        return null;
    }
   
    protected final BigDecimal getFractionalSecondsAsBigDecimal(DateTimeData data) {
        final StringBuffer buf = new StringBuffer();
        append3(buf, data.unNormSecond);
        String value = buf.toString();
        final int index = value.indexOf('.');
        if (index == -1) {
            return null;
        }
        value = value.substring(index);
        final BigDecimal _val = new BigDecimal(value);
        if (_val.compareTo(BigDecimal.valueOf(0)) == 0) {
            return null;
        }
        return _val;
    }
}
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