Examples of de.susebox.jtopas.spi.DataProvider

de.susebox.jtopas.spi.DataProvider

This interface supplies the nessecary methods for a {@link DataMapper} or itssubinterfaces ( {@link WhitespaceHandler}, {@link SeparatorHandler}, {@link PatternHandler}{@link KeywordHandler} and {@link SequenceHandler}) to perform its operations like checking for whitespaces, special sequences etc. Instances of the interface are created by {@link de.susebox.jtopas.Tokenizer} implementations.
A {@link de.susebox.jtopas.Tokenizer} implementation will either implement theDataProvider interface itself or has an associated - probably non-public - implementing class.
Note:: Each implementation of this interface should also override the method {@link java.lang.Object#toString}. The implementation of toString should return a string composed of all characters of a DataProvider between {@link #getStartPosition} (including) and {@link #getStartPosition} + {@link #getLength} (excluding).
Note:: This interface will eventually be deprecated in favour of the new JDK 1.4 interface {@link java.lang.CharSequence}.
@see de.susebox.jtopas.Tokenizer @see de.susebox.jtopas.TokenizerProperties @see DataMapper @author Heiko Blau

   * @return  number of whitespace characters starting from the given offset
   * @throws  TokenizerException failure while reading data from the input stream
   */
  protected int readWhitespaces(int startingAtPos, int maxChars) throws TokenizerException {
    if (_whitespaceHandler != null) {
      DataProvider dataProvider = getBaseDataProvider(startingAtPos, maxChars);
      return _whitespaceHandler.countLeadingWhitespaces(dataProvider);
    } else {
      return 0;
    }
  }

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   * @throws  TokenizerException routed exception from the active {@link de.susebox.jtopas.spi.KeywordHandler}
   * @return  {@link TokenizerProperty} describing the keyword or <code>null</code>
   */
  protected TokenizerProperty isKeyword(int startingAtPos, int length) throws TokenizerException {
    if (_keywordHandler != null) {
      DataProvider dataProvider = getBaseDataProvider(startingAtPos, length);
      return _keywordHandler.isKeyword(dataProvider);
    } else {
      return null;
    }
  }

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          break;
        }
      }


      // try pattern matching
      DataProvider          dataProvider  = getBaseDataProvider(startingAtPos, _currentWritePos - startingAtPos);
      PatternHandler.Result result        = _patternHandler.matches(dataProvider);
      boolean               isFree        = (result != null) ? isFlagSet(result.getProperty(), Flags.F_FREE_PATTERN) : false;
      
      if (result != null && (isFree || ! freePatternOnly)) {
        if ( ! isFree) {

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          break;
        }
      }
      
      // invoke the sequence handler
      DataProvider      dataProvider = getBaseDataProvider(startingAtPos, _currentWritePos - startingAtPos);
      TokenizerProperty prop         = _sequenceHandler.startsWithSequenceCommentOrString(dataProvider);
    
      if (prop != null) {
        _scannedToken[1] = new Token(prop.getType(), null, prop);
        return true;

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Related Classes of de.susebox.jtopas.spi.DataProvider

de.susebox.jtopas.AbstractTokenizer

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