Package org.drools.drl.parser.antlr4

Class ParserHelper

java.lang.Object
org.drools.drl.parser.antlr4.ParserHelper
public class ParserHelper extends Object
This is a class to hold all the helper functions/methods used by the DRL parser

  • Field Details

  • Constructor Details

    • ParserHelper

      public ParserHelper(org.antlr.v4.runtime.TokenStream input, LanguageLevelOption languageLevel)

  • Method Details

    • getEditorInterface

      public LinkedList<DroolsSentence> getEditorInterface()

    • setLeftMostExpr

      public void setLeftMostExpr(String value)

    • getLeftMostExpr

      public String getLeftMostExpr()

    • enableEditorInterface

      public void enableEditorInterface()

    • disableEditorInterface

      public void disableEditorInterface()

    • setHasOperator

      public void setHasOperator(boolean hasOperator)

    • getHasOperator

      public boolean getHasOperator()

    • beginSentence

      public void beginSentence(DroolsSentenceType sentenceType)

    • getActiveSentence

      public DroolsSentence getActiveSentence()

    • emit

      public void emit(List<?> tokens, DroolsEditorType editorType)

    • emit

      public void emit(org.antlr.v4.runtime.Token token, DroolsEditorType editorType)

    • emit

      public void emit(int activeContext)

    • getLastTokenOnList

      public DroolsToken getLastTokenOnList(LinkedList<?> list)

    • retrieveLT

      public String retrieveLT(int LTNumber)

    • validateLT

      public boolean validateLT(int LTNumber, String text)

    • isPluggableEvaluator

      public boolean isPluggableEvaluator(int offset, boolean negated)

    • isPluggableEvaluator

      public boolean isPluggableEvaluator(boolean negated)
      Check if the next token is a registered operator. The registry is dynamic, so we can add custom operators dynamically.
      Parameters:
      negated - true if the operator needs to support negation
      Returns:
      true if the next token is a registered operator
      See Also:

    • validateIdentifierKey

      public boolean validateIdentifierKey(String text)

    • validateCEKeyword

      public boolean validateCEKeyword(int index)

    • validateStatement

      public boolean validateStatement(int index)

    • validateAttribute

      public boolean validateAttribute(int index)

    • reportError

      public void reportError(Object offendingSymbol, int line, int charPositionInLine, String message, org.antlr.v4.runtime.RecognitionException ex)

    • reportError

      public void reportError(Exception e)

    • getErrors

      public List<DroolsParserException> getErrors()
      return the raw DroolsParserException errors

    • getErrorMessages

      public List<String> getErrorMessages()
      Return a list of pretty strings summarising the errors

    • hasErrors

      public boolean hasErrors()
      return true if any parser errors were accumulated

    • pushParaphrases

      public void pushParaphrases(DroolsParaphraseTypes type)
      Method that adds a paraphrase type into paraphrases stack.
      Parameters:
      type - paraphrase type

    • popParaphrases

      public Map<DroolsParaphraseTypes,String> popParaphrases()

    • setParaphrasesValue

      public void setParaphrasesValue(DroolsParaphraseTypes type, String value)
      Method that sets paraphrase value for a type into paraphrases stack.
      Parameters:
      type - paraphrase type
      value - paraphrase value

    • start

      public <T extends DescrBuilder<?, ?>> T start(DescrBuilder<?,?> ctxBuilder, Class<T> clazz, String param)

    • end

      public <T extends DescrBuilder<?, ?>> T end(Class<T> clazz, DescrBuilder<?,?> builder)

    • getStatementKeywords

      public String[] getStatementKeywords()