private static String byteArrayToHex(byte[] bytes) {
   //        final StringBuilder sb = new StringBuilder(bytes.length * 2);
   final FastStringBuffer sb = new FastStringBuffer(bytes.length * 2);
   for (int i = 0; i < bytes.length; i++) {
     sb.append(HEXADECIMAL_DIGITS[(bytes[i] >> 4) & 0xf]);
     sb.append(HEXADECIMAL_DIGITS[bytes[i] & 0xf]);
   }
   return sb.toString();
 }
Beispiel #2
0
 /**
  * Convert a double to a BigDecimal. In general there will be several BigDecimal values that are
  * equal to the supplied value, and the one we want to choose is the one with fewest non-zero
  * digits. The algorithm used is rather pragmatic: look for a string of zeroes or nines, try
  * rounding the number down or up as approriate, then convert the adjusted value to a double to
  * see if it's equal to the original: if not, use the original value unchanged.
  *
  * @param value the double to be converted
  * @param precision 2 for a double, 1 for a float
  * @return the result of conversion to a double
  */
 public static BigDecimal adjustToDecimal(double value, int precision) {
   final String zeros = (precision == 1 ? "00000" : "000000000");
   final String nines = (precision == 1 ? "99999" : "999999999");
   BigDecimal initial = new BigDecimal(value);
   BigDecimal trial = null;
   FastStringBuffer fsb = new FastStringBuffer(20);
   DecimalValue.decimalToString(initial, fsb);
   String s = fsb.toString();
   int start = (s.charAt(0) == '-' ? 1 : 0);
   int p = s.indexOf(".");
   int i = s.lastIndexOf(zeros);
   if (i > 0) {
     if (p < 0 || i < p) {
       // we're in the integer part
       // try replacing all following digits with zeros and seeing if we get the same double back
       FastStringBuffer sb = new FastStringBuffer(s.length());
       sb.append(s.substring(0, i));
       for (int n = i; n < s.length(); n++) {
         sb.append(s.charAt(n) == '.' ? '.' : '0');
       }
       trial = new BigDecimal(sb.toString());
     } else {
       // we're in the fractional part
       // try truncating the number before the zeros and seeing if we get the same double back
       trial = new BigDecimal(s.substring(0, i));
     }
   } else {
     i = s.indexOf(nines);
     if (i >= 0) {
       if (i == start) {
         // number starts with 99999... or -99999. Try rounding up to 100000.. or -100000...
         FastStringBuffer sb = new FastStringBuffer(s.length() + 1);
         if (start == 1) {
           sb.append('-');
         }
         sb.append('1');
         for (int n = start; n < s.length(); n++) {
           sb.append(s.charAt(n) == '.' ? '.' : '0');
         }
         trial = new BigDecimal(sb.toString());
       } else {
         // try rounding up
         while (i >= 0 && (s.charAt(i) == '9' || s.charAt(i) == '.')) {
           i--;
         }
         if (i < 0 || s.charAt(i) == '-') {
           return initial; // can't happen: we've already handled numbers starting 99999..
         } else if (p < 0 || i < p) {
           // we're in the integer part
           FastStringBuffer sb = new FastStringBuffer(s.length());
           sb.append(s.substring(0, i));
           sb.append((char) ((int) s.charAt(i) + 1));
           for (int n = i; n < s.length(); n++) {
             sb.append(s.charAt(n) == '.' ? '.' : '0');
           }
           trial = new BigDecimal(sb.toString());
         } else {
           // we're in the fractional part - can ignore following digits
           String s2 = s.substring(0, i) + (char) ((int) s.charAt(i) + 1);
           trial = new BigDecimal(s2);
         }
       }
     }
   }
   if (trial != null
       && (precision == 1 ? trial.floatValue() == value : trial.doubleValue() == value)) {
     return trial;
   } else {
     return initial;
   }
 }
Beispiel #3
0
  public static PooledXPathExpression getXPathExpression(
      PropertyContext propertyContext,
      List<Item> contextItems,
      int contextPosition,
      String xpathString,
      Map<String, String> prefixToURIMap,
      Map<String, ValueRepresentation> variableToValueMap,
      FunctionLibrary functionLibrary,
      String baseURI,
      boolean isAvt,
      boolean testNoCache,
      LocationData locationData) {

    try {
      // Find pool from cache
      final Long validity = (long) 0;
      final Cache cache = ObjectCache.instance(XPATH_CACHE_NAME, XPATH_CACHE_DEFAULT_SIZE);
      final FastStringBuffer cacheKeyString = new FastStringBuffer(xpathString);
      {
        if (functionLibrary != null) { // This is ok
          cacheKeyString.append('|');
          cacheKeyString.append(Integer.toString(functionLibrary.hashCode()));
        }
      }
      {
        // NOTE: Mike Kay confirms on 2007-07-04 that compilation depends on the namespace context,
        // so we need
        // to use it as part of the cache key.

        // TODO: PERF: It turns out that this takes a lot of time. Now that the namespace
        // information is computed statically, we can do better.
        if (DEBUG_TEST_KEY_OPTIMIZATION) {
          // PERF TEST ONLY
          cacheKeyString.append("|DUMMYNSVAR|");
        } else {

          if (prefixToURIMap != null) {
            final Map<String, String> sortedMap =
                (prefixToURIMap instanceof TreeMap)
                    ? prefixToURIMap
                    : new TreeMap<String, String>(
                        prefixToURIMap); // this should make sure we always get the keys in the same
                                         // order
            for (Map.Entry<String, String> currentEntry : sortedMap.entrySet()) {
              cacheKeyString.append('|');
              cacheKeyString.append(currentEntry.getKey());
              cacheKeyString.append('=');
              cacheKeyString.append(currentEntry.getValue());
            }
          }
        }
      }
      if (DEBUG_TEST_KEY_OPTIMIZATION) {
        // PERF TEST ONLY
        // NOP
      } else {

        if (variableToValueMap != null && variableToValueMap.size() > 0) {
          // There are some variables in scope. They must be part of the key
          // TODO: Put this in static state as this can be determined statically once and for all
          for (final String variableName : variableToValueMap.keySet()) {
            cacheKeyString.append('|');
            cacheKeyString.append(variableName);
          }
        }
      }
      {
        // Add this to the key as evaluating "name" as XPath or as AVT is very different!
        cacheKeyString.append('|');
        cacheKeyString.append(Boolean.toString(isAvt));
      }

      // TODO: Add baseURI to cache key (currently, baseURI is pretty much unused)

      final Set<String> variableNames =
          (variableToValueMap != null) ? variableToValueMap.keySet() : null;
      final PooledXPathExpression expr;
      if (testNoCache) {
        // For testing only: don't get expression from cache
        final Object o =
            new XFormsCachePoolableObjetFactory(
                    null,
                    xpathString,
                    prefixToURIMap,
                    variableNames,
                    functionLibrary,
                    baseURI,
                    isAvt,
                    false,
                    locationData)
                .makeObject();
        expr = (PooledXPathExpression) o;
      } else {
        // Get or create pool
        final InternalCacheKey cacheKey =
            new InternalCacheKey("XPath Expression2", cacheKeyString.toString());
        ObjectPool pool = (ObjectPool) cache.findValid(propertyContext, cacheKey, validity);
        if (pool == null) {
          pool =
              createXPathPool(
                  xpathString,
                  prefixToURIMap,
                  variableNames,
                  functionLibrary,
                  baseURI,
                  isAvt,
                  locationData);
          cache.add(propertyContext, cacheKey, validity, pool);
        }

        // Get object from pool
        final Object o = pool.borrowObject();
        expr = (PooledXPathExpression) o;
      }

      // Set context items and position
      expr.setContextItems(contextItems, contextPosition);

      // Set variables
      expr.setVariables(variableToValueMap);

      return expr;
    } catch (Exception e) {
      throw handleXPathException(e, xpathString, "preparing XPath expression", locationData);
    }
  }