Package org.drools.drl.parser.antlr4

Class DRL10ParserHelper

java.lang.Object

org.drools.drl.parser.antlr4.DRL10ParserHelper

public class DRL10ParserHelper
extends Object

Collection of static helper methods for DRL10Parser

Method Summary

Modifier and Type	Method	Description
static PackageDescr	compilationUnitContext2PackageDescr(DRL10Parser.CompilationUnitContext ctx, org.antlr.v4.runtime.TokenStream tokenStream, Resource resource)	DRLVisitorImpl visits a parse tree and creates a PackageDescr
static Integer	computeTokenIndex(DRL10Parser parser, int row, int col)	Given a row and column of the input DRL, return the index of the matched token
static DRL10Parser	createDrlParser(InputStream is, String encoding)
static DRL10Parser	createDrlParser(Reader reader)
static DRL10Parser	createDrlParser(String drl)
static String	getTextWithoutErrorNode(org.antlr.v4.runtime.tree.ParseTree tree)	RuleContext.getText() connects all nodes including ErrorNode.
static PackageDescr	parse(String drl)	Entry point for parsing DRL.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

parse

public static PackageDescr parse(String drl)

Entry point for parsing DRL. Unlike DRL10ParserWrapper.parse(), this method does not collect errors.

createDrlParser

public static DRL10Parser createDrlParser(String drl)

createDrlParser

public static DRL10Parser createDrlParser(InputStream is,
 String encoding)

createDrlParser

public static DRL10Parser createDrlParser(Reader reader)

compilationUnitContext2PackageDescr

public static PackageDescr compilationUnitContext2PackageDescr(DRL10Parser.CompilationUnitContext ctx,
 org.antlr.v4.runtime.TokenStream tokenStream,
 Resource resource)

DRLVisitorImpl visits a parse tree and creates a PackageDescr

computeTokenIndex

public static Integer computeTokenIndex(DRL10Parser parser,
 int row,
 int col)

Given a row and column of the input DRL, return the index of the matched token

getTextWithoutErrorNode

public static String getTextWithoutErrorNode(org.antlr.v4.runtime.tree.ParseTree tree)

RuleContext.getText() connects all nodes including ErrorNode. This method appends texts only from valid nodes