Package org.drools.lang.descr

Examples of org.drools.lang.descr.ConstraintConnectiveDescr

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    @Test
    public void testDumpBindingsComplexOp2() throws Exception {
        String input = "$x : age not in (10, 20, $someVal)";
        String expected = "age != 10 && age != 20 && age != $someVal";

        ConstraintConnectiveDescr descr = parse( input );
        MVELDumperContext ctx = new MVELDumperContext();
        String result = dumper.dump( descr,
                                     ctx );

        assertEquals( expected,
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                      bind.getExpression() );
    }

    public ConstraintConnectiveDescr parse( final String constraint ) {
        DrlExprParser parser = new DrlExprParser();
        ConstraintConnectiveDescr result = parser.parse( constraint );
        assertFalse( parser.getErrors().toString(),
                     parser.hasErrors() );

        return result;
    }
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        this.languageLevel = languageLevel;
    }

    /** Parse an expression from text */
    public ConstraintConnectiveDescr parse( final String text ) {
        ConstraintConnectiveDescr constraint = null;
        try {
            DRLLexer lexer = getDRLLexer(new ANTLRStringStream(text), languageLevel);
            CommonTokenStream input = new CommonTokenStream( lexer );
            RecognizerSharedState state = new RecognizerSharedState();
            helper = new ParserHelper( input, state, languageLevel );
            DRLExpressions parser = getDRLExpressions( input, state, helper, languageLevel );
            parser.setBuildDescr( true );
            parser.setLeftMostExpr( null ); // setting initial value just in case
            BaseDescr expr = parser.conditionalOrExpression();
            if ( expr != null && !parser.hasErrors() ) {
                constraint = ConstraintConnectiveDescr.newAnd();
                constraint.addOrMerge( expr );
            }
        } catch ( RecognitionException e ) {
            helper.reportError( e );
        }
        return constraint;
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            String expression = null;
            boolean isPositional = false;
            boolean isBinding = false;
            BindingDescr bind = null;
            ConstraintConnectiveDescr result = null;
            if ( base instanceof BindingDescr ) {
                bind = (BindingDescr) base;
                expression = bind.getVariable() + (bind.isUnification() ? " := " : " : ") + bind.getExpression();
                isBinding = true;
            } else {
                if ( base instanceof ExprConstraintDescr ) {
                    ExprConstraintDescr ecd = (ExprConstraintDescr) base;
                    expression = ecd.getExpression();
                    isPositional = ecd.getType() == ExprConstraintDescr.Type.POSITIONAL;

                } else {
                    expression = base.getText();
                }

                result = parseExpression( context,
                                          patternDescr,
                                          expression );
                if ( result == null ) {
                    // error, can't parse expression.
                    context.addError( new DescrBuildError( context.getParentDescr(),
                                                                  descr,
                                                                  null,
                                                                  "Unable to parse constraint: \n" + expression ) );
                    continue;
                }
                isBinding = result.getDescrs().size() == 1 && result.getDescrs().get( 0 ) instanceof BindingDescr;
                if ( isBinding ) {
                    bind = (BindingDescr) result.getDescrs().get( 0 );
                }
            }

            if ( (!isPositional) && (!isBinding) ) {
                // error, can't have non binding slots.
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                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,
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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,
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                isPositional = descr.getType() == ExprConstraintDescr.Type.POSITIONAL;
            } else {
                expression = b.getText();
            }

            ConstraintConnectiveDescr result = parseExpression( context,
                                                                patternDescr,
                                                                b,
                                                                expression );
            if ( result == null ) {
                return;
            }

            isPositional &= !( result.getDescrs().size() == 1 && result.getDescrs().get( 0 ) instanceof BindingDescr );

            if ( isPositional ) {
                processPositional(context,
                        patternDescr,
                        pattern,
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    protected void build( final RuleBuildContext context,
                        final PatternDescr patternDescr,
                        final Pattern pattern,
                        final BaseDescr original,
                        final String expr ) {
        ConstraintConnectiveDescr result = parseExpression( context,
                                                            patternDescr,
                                                            original,
                                                            expr );
        if ( result == null ) {
            return;
        }
        result.copyLocation( original );
        MVELDumper.MVELDumperContext mvelCtx = new MVELDumper.MVELDumperContext().setRuleContext(context);
        build( context,
               patternDescr,
               pattern,
               result,
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    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,
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                  state._fsp--;
                  if (state.failed) return result;
                  if ( state.backtracking==0 ) {
                     if( buildDescr  ) {
                                   ConstraintConnectiveDescr descr = ConstraintConnectiveDescr.newXor();
                                   descr.addOrMerge( result ); 
                                   descr.addOrMerge( right );
                                   result = descr;
                               }
                            
                  }
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Related Classes of org.drools.lang.descr.ConstraintConnectiveDescr

  • org.drools.compiler.DrlExprParser
  • org.drools.lang.DRL5Expressions
  • org.drools.lang.DRL6Expressions
  • org.drools.lang.DRLExpressions
  • org.drools.lang.DRLExprParserTest
  • org.drools.lang.DRLExprTreeTest
  • org.drools.lang.MVELDumper
  • org.drools.lang.MVELDumperTest
  • org.drools.rule.builder.PatternBuilder
  • org.drools.rule.builder.QueryElementBuilder
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