Package org.drools.compiler

Examples of org.drools.compiler.DrlExprParser

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    @SuppressWarnings("unchecked")
    private ConstraintConnectiveDescr parseExpression( final RuleBuildContext context,
                                                       final PatternDescr patternDescr,
                                                       final String expression ) {
        DrlExprParser parser = new DrlExprParser();
        ConstraintConnectiveDescr result = parser.parse( expression );
        if ( result == null || parser.hasErrors() ) {
            for ( DroolsParserException error : parser.getErrors() ) {
                context.getErrors().add( new DescrBuildError( context.getParentDescr(),
                                                              patternDescr,
                                                              null,
                                                              "Unable to parser pattern expression:\n" + error.getMessage() ) );
            }
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    @SuppressWarnings("unchecked")
    private ConstraintConnectiveDescr parseExpression( final RuleBuildContext context,
                                                       final PatternDescr patternDescr,
                                                       final String expression ) {
        DrlExprParser parser = new DrlExprParser();
        ConstraintConnectiveDescr result = parser.parse( expression );
        if ( result == null || parser.hasErrors() ) {
            for ( DroolsParserException error : parser.getErrors() ) {
                context.getErrors().add( new DescrBuildError( context.getParentDescr(),
                                                              patternDescr,
                                                              null,
                                                              "Unable to parser pattern expression:\n" + error.getMessage() ) );
            }
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    @SuppressWarnings("unchecked")
    private ConstraintConnectiveDescr parseExpression( final RuleBuildContext context,
                                                       final PatternDescr patternDescr,
                                                       final BaseDescr original,
                                                       final String expression ) {
        DrlExprParser parser = new DrlExprParser();
        ConstraintConnectiveDescr result = parser.parse( expression );
        result.copyLocation( original );
        if ( parser.hasErrors() ) {
            for ( DroolsParserException error : parser.getErrors() ) {
                context.addError(new DescrBuildError(context.getParentDescr(),
                        patternDescr,
                        null,
                        "Unable to parser pattern expression:\n" + error.getMessage()));
            }
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                declrIndexes.add( pos );
                requiredDeclarations.add( declr );
            } else {
                // it must be a literal/expression
                // it's an expression and thus an input
                DrlExprParser parser = new DrlExprParser();
                ConstraintConnectiveDescr bresult = parser.parse( bind.getExpression() );
                if ( parser.hasErrors() ) {
                    for ( DroolsParserException error : parser.getErrors() ) {
                        context.addError( new DescrBuildError( context.getParentDescr(),
                                                                      descr,
                                                                      null,
                                                                      "Unable to parser pattern expression:\n" + error.getMessage() ) );
                    }
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    @SuppressWarnings("unchecked")
    private ConstraintConnectiveDescr parseExpression( final RuleBuildContext context,
                                                       final PatternDescr patternDescr,
                                                       final String expression ) {
        DrlExprParser parser = new DrlExprParser();
        ConstraintConnectiveDescr result = parser.parse( expression );
        if ( result == null || parser.hasErrors() ) {
            for ( DroolsParserException error : parser.getErrors() ) {
                context.addError( new DescrBuildError( context.getParentDescr(),
                                                              patternDescr,
                                                              null,
                                                              "Unable to parser pattern expression:\n" + error.getMessage() ) );
            }
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    @SuppressWarnings("unchecked")
    protected ConstraintConnectiveDescr parseExpression( final RuleBuildContext context,
                                                         final PatternDescr patternDescr,
                                                         final BaseDescr original,
                                                         final String expression ) {
        DrlExprParser parser = new DrlExprParser();
        ConstraintConnectiveDescr result = parser.parse( expression );
        result.copyLocation( original );
        if ( parser.hasErrors() ) {
            for ( DroolsParserException error : parser.getErrors() ) {
                context.addError(new DescrBuildError(context.getParentDescr(),
                        patternDescr,
                        null,
                        "Unable to parser pattern expression:\n" + error.getMessage()));
            }
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                                sbuilder,
                                left.toString(),
                                red.getOperatorDescr(),
                                right.toString() );// maximum precedence, so wrap any child connective in parenthesis
        } else if ( base instanceof ExprConstraintDescr ) {
            DrlExprParser expr = new DrlExprParser();
            ConstraintConnectiveDescr result = expr.parse( ((ExprConstraintDescr) base).getExpression() );
            if ( result.getDescrs().size() == 1 ) {
                dump( sbuilder,
                      result.getDescrs().get( 0 ),
                      0,
                      isInsideRelCons,
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    @SuppressWarnings("unchecked")
    private ConstraintConnectiveDescr parseExpression( final RuleBuildContext context,
                                                       final PatternDescr patternDescr,
                                                       final BaseDescr original,
                                                       final String expression ) {
        DrlExprParser parser = new DrlExprParser();
        ConstraintConnectiveDescr result = parser.parse( expression );
        result.copyLocation( original );
        if ( result == null || parser.hasErrors() ) {
            for ( DroolsParserException error : parser.getErrors() ) {
                context.getErrors().add( new DescrBuildError( context.getParentDescr(),
                                                              patternDescr,
                                                              null,
                                                              "Unable to parser pattern expression:\n" + error.getMessage() ) );
            }
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        }
        return sbuilder;
    }

    private void processConstraint(StringBuilder sbuilder, ExprConstraintDescr base, boolean isInsideRelCons, MVELDumperContext context) {
        DrlExprParser expr = new DrlExprParser();
        ConstraintConnectiveDescr result = expr.parse( base.getExpression() );
        if ( result.getDescrs().size() == 1 ) {
            dump( sbuilder,
                  result.getDescrs().get( 0 ),
                  0,
                  isInsideRelCons,
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        this.solvers = solvers;
    }

    public void visit(ExprConstraintDescr descr) {

        DrlExprParser drlExprParser = new DrlExprParser(LanguageLevelOption.DRL5);
        ConstraintConnectiveDescr constraintConnectiveDescr = drlExprParser.parse(descr.getExpression());

        visit(constraintConnectiveDescr.getDescrs());
    }
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Related Classes of org.drools.compiler.DrlExprParser

  • org.antlr.runtime.ANTLRStringStream
  • org.antlr.runtime.CommonTokenStream
  • org.antlr.runtime.RecognizerSharedState
  • org.drools.lang.descr.BaseDescr
  • org.drools.lang.descr.ConstraintConnectiveDescr
  • org.drools.lang.DRLExpressions
  • org.drools.lang.DRLExprParserTest
  • org.drools.lang.DRLExprTreeTest
  • org.drools.lang.DRLLexer
  • org.drools.lang.MVELDumper
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