content: /*
   * 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 mf.org.apache.xerces.impl.dv.InvalidDatatypeValueException;
  import mf.org.apache.xerces.impl.dv.ValidationContext;
  import mf.org.apache.xerces.xs.XSSimpleTypeDefinition;
  
  /**
   * Validator for <precisionDecimal> datatype (W3C Schema 1.1)
   *
   * @author Ankit Pasricha, IBM
   * @version $Id: PrecisionDecimalDV.java 446745 2006-09-15 21:43:58Z mrglavas $
   * @xerces.experimental
   */
  class PrecisionDecimalDV extends TypeValidator {
  
      /* (non-Javadoc)
       * @see org.apache.xerces.impl.dv.xs.TypeValidator#getAllowedFacets()
       */
      @Override
      public short getAllowedFacets() {
          return (XSSimpleTypeDefinition.FACET_PATTERN | XSSimpleTypeDefinition.FACET_WHITESPACE | XSSimpleTypeDefinition.FACET_ENUMERATION | XSSimpleTypeDefinition.FACET_MAXINCLUSIVE | XSSimpleTypeDefinition.FACET_MININCLUSIVE | XSSimpleTypeDefinition.FACET_MAXEXCLUSIVE | XSSimpleTypeDefinition.FACET_MINEXCLUSIVE | XSSimpleTypeDefinition.FACET_TOTALDIGITS | XSSimpleTypeDefinition.FACET_FRACTIONDIGITS);
      }
  
      /* (non-Javadoc)
       * @see org.apache.xerces.impl.dv.xs.TypeValidator#getActualValue(java.lang.String, org.apache.xerces.impl.dv.ValidationContext)
       */
      @Override
      public Object getActualValue(String content, ValidationContext context)
              throws InvalidDatatypeValueException {
          try {
              return new XPrecisionDecimal(content);
          } catch (NumberFormatException nfe) {
              throw new InvalidDatatypeValueException("cvc-datatype-valid.1.2.1", new Object[]{content, "precisionDecimal"});
          }
      }
  
      @Override
      public int compare(Object value1, Object value2) {
          return ((XPrecisionDecimal) value1).compareTo((XPrecisionDecimal) value2);
      }
  
      @Override
      public int getFractionDigits(Object value) {
          return ((XPrecisionDecimal) value).fracDigits;
      }
  
      @Override
      public int getTotalDigits(Object value) {
          return ((XPrecisionDecimal) value).totalDigits;
      }
  
      @Override
      public boolean isIdentical(Object value1, Object value2) {
          if (!(value2 instanceof XPrecisionDecimal) || !(value1 instanceof XPrecisionDecimal))
              return false;
          return ((XPrecisionDecimal) value1).isIdentical((XPrecisionDecimal) value2);
      }
  
      static class XPrecisionDecimal {
  
          // sign: 0 for absent; 1 for positive values; -1 for negative values (except in case of INF, -INF)
          int sign = 1;
          // total digits. >= 1
          int totalDigits = 0;
          // integer digits when sign != 0
          int intDigits = 0;
          // fraction digits when sign != 0
          int fracDigits = 0;
          //precision
          //int precision = 0;
          // the string representing the integer part
          String ivalue = "";
          // the string representing the fraction part
          String fvalue = "";
  
          int pvalue = 0;
          private String canonical;
  
          XPrecisionDecimal(String content) throws NumberFormatException {
              if (content.equals("NaN")) {
                  ivalue = content;
                  sign = 0;
              }
              if (content.equals("+INF") || content.equals("INF") || content.equals("-INF")) {
                  ivalue = content.charAt(0) == '+' ? content.substring(1) : content;
                  return;
              }
              initD(content);
          }
  
          void initD(String content) throws NumberFormatException {
              int len = content.length();
              if (len == 0)
                  throw new NumberFormatException();
  
              // these 4 variables are used to indicate where the integre/fraction
              // parts start/end.
              int intStart = 0, intEnd = 0, fracStart = 0, fracEnd = 0;
  
              // Deal with leading sign symbol if present
              if (content.charAt(0) == '+') {
                  // skip '+', so intStart should be 1
                  intStart = 1;
              } else if (content.charAt(0) == '-') {
                  intStart = 1;
                  sign = -1;
              }
  
              // skip leading zeroes in integer part
              int actualIntStart = intStart;
              while (actualIntStart < len && content.charAt(actualIntStart) == '0') {
                  actualIntStart++;
              }
  
              // Find the ending position of the integer part
              for (intEnd = actualIntStart; intEnd < len && TypeValidator.isDigit(content.charAt(intEnd)); intEnd++)
                  ;
  
              // Not reached the end yet
              if (intEnd < len) {
                  // the remaining part is not ".DDD" or "EDDD" or "eDDD", error
                  if (content.charAt(intEnd) != '.' && content.charAt(intEnd) != 'E' && content.charAt(intEnd) != 'e')
                      throw new NumberFormatException();
  
                  if (content.charAt(intEnd) == '.') {
                      // fraction part starts after '.', and ends at the end of the input
                      fracStart = intEnd + 1;
  
                      // find location of E or e (if present)
                      // Find the ending position of the fracion part
                      for (fracEnd = fracStart;
                           fracEnd < len && TypeValidator.isDigit(content.charAt(fracEnd));
                           fracEnd++)
                          ;
                  } else {
                      pvalue = Integer.parseInt(content.substring(intEnd + 1, len));
                  }
              }
  
              // no integer part, no fraction part, error.
              if (intStart == intEnd && fracStart == fracEnd)
                  throw new NumberFormatException();
  
              // ignore trailing zeroes in fraction part
              /*while (fracEnd > fracStart && content.charAt(fracEnd-1) == '0') {
               fracEnd--;
               }*/
  
              // check whether there is non-digit characters in the fraction part
              for (int fracPos = fracStart; fracPos < fracEnd; fracPos++) {
                  if (!TypeValidator.isDigit(content.charAt(fracPos)))
                      throw new NumberFormatException();
              }
  
              intDigits = intEnd - actualIntStart;
              fracDigits = fracEnd - fracStart;
  
              if (intDigits > 0) {
                  ivalue = content.substring(actualIntStart, intEnd);
              }
  
              if (fracDigits > 0) {
                  fvalue = content.substring(fracStart, fracEnd);
                  if (fracEnd < len) {
                      pvalue = Integer.parseInt(content.substring(fracEnd + 1, len));
                  }
              }
              totalDigits = intDigits + fracDigits;
          }
  
          @Override
          public boolean equals(Object val) {
              if (val == this)
                  return true;
  
              if (!(val instanceof XPrecisionDecimal))
                  return false;
              XPrecisionDecimal oval = (XPrecisionDecimal) val;
  
              return this.compareTo(oval) == EQUAL;
          }
  
          /**
           * @return
           */
          private int compareFractionalPart(XPrecisionDecimal oval) {
              if (fvalue.equals(oval.fvalue))
                  return EQUAL;
  
              StringBuffer temp1 = new StringBuffer(fvalue);
              StringBuffer temp2 = new StringBuffer(oval.fvalue);
  
              truncateTrailingZeros(temp1, temp2);
              return temp1.toString().compareTo(temp2.toString());
          }
  
          private void truncateTrailingZeros(StringBuffer fValue, StringBuffer otherFValue) {
              for (int i = fValue.length() - 1; i >= 0; i--)
                  if (fValue.charAt(i) == '0')
                      fValue.deleteCharAt(i);
                  else
                      break;
  
              for (int i = otherFValue.length() - 1; i >= 0; i--)
                  if (otherFValue.charAt(i) == '0')
                      otherFValue.deleteCharAt(i);
                  else
                      break;
          }
  
          public int compareTo(XPrecisionDecimal val) {
  
              // seen NaN
              if (sign == 0)
                  return INDETERMINATE;
  
              //INF is greater than everything and equal to itself
              if (ivalue.equals("INF") || val.ivalue.equals("INF")) {
                  if (ivalue.equals(val.ivalue))
                      return EQUAL;
                  else if (ivalue.equals("INF"))
                      return GREATER_THAN;
                  return LESS_THAN;
              }
  
              //-INF is smaller than everything and equal itself
              if (ivalue.equals("-INF") || val.ivalue.equals("-INF")) {
                  if (ivalue.equals(val.ivalue))
                      return EQUAL;
                  else if (ivalue.equals("-INF"))
                      return LESS_THAN;
                  return GREATER_THAN;
              }
  
              if (sign != val.sign)
                  return sign > val.sign ? GREATER_THAN : LESS_THAN;
  
              return sign * compare(val);
          }
  
          // To enable comparison - the exponent part of the decimal will be limited
          // to the max value of int.
          private int compare(XPrecisionDecimal val) {
  
              if (pvalue != 0 || val.pvalue != 0) {
                  if (pvalue == val.pvalue)
                      return intComp(val);
                  else {
  
                      if (intDigits + pvalue != val.intDigits + val.pvalue)
                          return intDigits + pvalue > val.intDigits + val.pvalue ? GREATER_THAN : LESS_THAN;
  
                      //otherwise the 2 combined values are the same
                      if (pvalue > val.pvalue) {
                          int expDiff = pvalue - val.pvalue;
                          StringBuffer buffer = new StringBuffer(ivalue);
                          StringBuffer fbuffer = new StringBuffer(fvalue);
                          for (int i = 0; i < expDiff; i++) {
                              if (i < fracDigits) {
                                  buffer.append(fvalue.charAt(i));
                                  fbuffer.deleteCharAt(i);
                              } else
                                  buffer.append('0');
                          }
                          return compareDecimal(buffer.toString(), val.ivalue, fbuffer.toString(), val.fvalue);
                      } else {
                          int expDiff = val.pvalue - pvalue;
                          StringBuffer buffer = new StringBuffer(val.ivalue);
                          StringBuffer fbuffer = new StringBuffer(val.fvalue);
                          for (int i = 0; i < expDiff; i++) {
                              if (i < val.fracDigits) {
                                  buffer.append(val.fvalue.charAt(i));
                                  fbuffer.deleteCharAt(i);
                              } else
                                  buffer.append('0');
                          }
                          return compareDecimal(ivalue, buffer.toString(), fvalue, fbuffer.toString());
                      }
                  }
              } else {
                  return intComp(val);
              }
          }
  
          /**
           * @param val
           * @return
           */
          private int intComp(XPrecisionDecimal val) {
              if (intDigits != val.intDigits)
                  return intDigits > val.intDigits ? GREATER_THAN : LESS_THAN;
  
              return compareDecimal(ivalue, val.ivalue, fvalue, val.fvalue);
          }
  
          /**
           * @param val
           * @return
           */
          private int compareDecimal(String iValue, String fValue, String otherIValue, String otherFValue) {
              int ret = iValue.compareTo(otherIValue);
              if (ret != 0)
                  return ret > 0 ? GREATER_THAN : LESS_THAN;
  
              if (fValue.equals(otherFValue))
                  return EQUAL;
  
              StringBuffer temp1 = new StringBuffer(fValue);
              StringBuffer temp2 = new StringBuffer(otherFValue);
  
              truncateTrailingZeros(temp1, temp2);
              ret = temp1.toString().compareTo(temp2.toString());
              return ret == 0 ? EQUAL : (ret > 0 ? GREATER_THAN : LESS_THAN);
          }
  
          @Override
          public synchronized String toString() {
              if (canonical == null) {
                  makeCanonical();
              }
              return canonical;
          }
  
          private void makeCanonical() {
              // REVISIT: to be determined by working group
              canonical = "TBD by Working Group";
          }
  
          /**
           * @param decimal
           * @return
           */
          public boolean isIdentical(XPrecisionDecimal decimal) {
              if (ivalue.equals(decimal.ivalue) && (ivalue.equals("INF") || ivalue.equals("-INF") || ivalue.equals("NaN")))
                  return true;
  
              return sign == decimal.sign && intDigits == decimal.intDigits && fracDigits == decimal.fracDigits && pvalue == decimal.pvalue
                      && ivalue.equals(decimal.ivalue) && fvalue.equals(decimal.fvalue);
          }
  
      }
  }
  