Package org.drools.lang.descr

Examples of org.drools.lang.descr.BindingDescr

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        assertEquals( expected,
                      result );
        assertEquals( 1,
                      ctx.getBindings().size() );
        BindingDescr bind = ctx.getBindings().get( 0 );
        assertEquals( "$x",
                      bind.getVariable() );
        assertEquals( "age",
                      bind.getExpression() );
    }
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        assertEquals( expected,
                      result );
        assertEquals( 1,
                      ctx.getBindings().size() );
        BindingDescr bind = ctx.getBindings().get( 0 );
        assertEquals( "$x",
                      bind.getVariable() );
        assertEquals( "age",
                      bind.getExpression() );
    }
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        assertEquals( expected,
                      result );
        assertEquals( 1,
                      ctx.getBindings().size() );
        BindingDescr bind = ctx.getBindings().get( 0 );
        assertEquals( "$x",
                      bind.getVariable() );
        assertEquals( "age",
                      bind.getExpression() );
    }
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        List colList = personPattern.getDescrs();
        assertEquals( 3,
                      colList.size() );
       
        // first, we have a field binding
        BindingDescr fbd = (BindingDescr) colList.get( 0 );
        assertEquals( "$bf",
                      fbd.getVariable() );
        assertEquals( "name",
                      fbd.getExpression() );
       
        // then, we have a field constraint
        FieldConstraintDescr fieldConstraintDescr = (FieldConstraintDescr) colList.get( 1 );
        assertEquals( "name",
                      fieldConstraintDescr.getFieldName() );
        RestrictionConnectiveDescr root = (RestrictionConnectiveDescr) fieldConstraintDescr.getRestriction();
        assertEquals( 1,
                      root.getRestrictions().size() );
        RestrictionConnectiveDescr or = (RestrictionConnectiveDescr) root.getRestrictions().get( 0 );
        assertEquals( RestrictionConnectiveDescr.OR,
                      or.getConnective() );
       
        List restrictionList = or.getRestrictions();

        assertEquals( 3,
                      restrictionList.size() );

        // first we have a literal restriction
        LiteralRestrictionDescr litDescr = (LiteralRestrictionDescr) restrictionList.get( 0 );
        assertEquals( "==",
                      litDescr.getEvaluator() );
        assertEquals( "yyy",
                      litDescr.getText() );

        // second, we have another literal restriction
        litDescr = (LiteralRestrictionDescr) restrictionList.get( 1 );
        assertEquals( "!=",
                      litDescr.getEvaluator() );
        assertEquals( "zzz",
                      litDescr.getText() );
       
        ReturnValueRestrictionDescr retDescr = (ReturnValueRestrictionDescr) restrictionList.get( 2 );
        assertEquals( "!=",
                      retDescr.getEvaluator() );
       
        LispForm lispForm = ( LispForm ) retDescr.getContent();
        assertEquals("(+ 2 3)", lispForm.toString() );

        // ----------------
        // this is how it would be compatible to our core engine
        PredicateDescr predicateDescr = (PredicateDescr) colList.get( 2 );
       
        lispForm = ( LispForm ) predicateDescr.getContent();
        assertEquals("(< 1 2)", lispForm.toString() );

        // -----------------
        // Parse the second column
        PatternDescr hobbyPattern = (PatternDescr) lhsList.get( 1 );
        assertEquals( "$c",
                      hobbyPattern.getIdentifier() );
        assertEquals( "hobby",
                      hobbyPattern.getObjectType() );

        colList = hobbyPattern.getDescrs();
        assertEquals( 3,
                      colList.size() );

        fbd = (BindingDescr) colList.get( 0 );
        assertEquals( "$bf2",
                      fbd.getVariable() );
        assertEquals( "type",
                      fbd.getExpression() );
       
        fieldConstraintDescr = (FieldConstraintDescr) colList.get( 1 );
        restrictionList = fieldConstraintDescr.getRestrictions();

        assertEquals( "type",
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        Declaration declr = p.addDeclaration( "age" );

        final InternalReadAccessor extractor = PatternBuilder.getFieldReadAccessor( context,
                                                                                    new BindingDescr("age", "age"),
                                                                                    p.getObjectType(),
                                                                                    "age",
                                                                                    declr,
                                                                                    true );
       
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            BaseDescr base = args.get( i );

            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();
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        MVELDumper.MVELDumperContext mvelCtx = new MVELDumper.MVELDumperContext().setRuleContext(context);
        for ( BaseDescr b : patternDescr.getDescrs() ) {
            String expression;
            boolean isPositional = false;
            if ( b instanceof BindingDescr ) {
                BindingDescr bind = (BindingDescr) b;
                expression = bind.getVariable() + (bind.isUnification() ? " := " : " : ") + bind.getExpression();
            } else if ( b instanceof ExprConstraintDescr ) {
                ExprConstraintDescr descr = (ExprConstraintDescr) b;
                expression = descr.getExpression();
                isPositional = descr.getType() == ExprConstraintDescr.Type.POSITIONAL;
            } else {
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            }

            if ( isSimpleIdentifier ) {
                // create a binding
                BindingDescr binder = new BindingDescr();
                binder.setUnification( true );
                binder.setExpression( field.getName() );
                binder.setVariable( descr.getExpression() );
                buildRuleBindings( context,
                                   patternDescr,
                                   pattern,
                                   binder );
            } else {
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        if ( relDescr.getRight() instanceof AtomicExprDescr ) {
            AtomicExprDescr rdescr = ((AtomicExprDescr) relDescr.getRight());
            value2 = rdescr.getRewrittenExpression().trim();
            usesThisRef = "this".equals( value2 ) || value2.startsWith( "this." );
        } else {
            BindingDescr rdescr = ((BindingDescr) relDescr.getRight());
            value2 = rdescr.getExpression().trim();
            usesThisRef = "this".equals( value2 ) || value2.startsWith( "this." );
        }
        if ( relDescr.getLeft() instanceof AtomicExprDescr ) {
            AtomicExprDescr ldescr = (AtomicExprDescr) relDescr.getLeft();
            value1 = ldescr.getRewrittenExpression();
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    protected static Declaration createDeclarationObject( final RuleBuildContext context,
                                                 final String identifier,
                                                 final String expr,
                                                 final Pattern pattern ) {
        final BindingDescr implicitBinding = new BindingDescr( identifier,
                                                               expr );

        final Declaration declaration = new Declaration( identifier,
                                                         null,
                                                         pattern,
                                                         true );

        InternalReadAccessor extractor = getFieldReadAccessor( context,
                                                               implicitBinding,
                                                               pattern.getObjectType(),
                                                               implicitBinding.getExpression(),
                                                               declaration,
                                                               false );

        if ( extractor == null ) {
            return null;
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  • org.drools.lang.api.impl.PatternDescrBuilderImpl
  • org.drools.lang.api.PatternDescrBuilderImpl
  • org.drools.lang.DRL5Expressions
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  • org.drools.lang.DRLExpressions
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