Package org.drools.compiler.lang.descr

Examples of org.drools.compiler.lang.descr.BindingDescr

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        final PatternDescr pattern = new PatternDescr( Cheese.class.getName(),
                                                       "stilton" );
        lhs.addDescr( pattern );

        BindingDescr fieldBindingDescr = new BindingDescr( "x",
                                                           "price" );
        pattern.addConstraint( fieldBindingDescr );
        fieldBindingDescr = new BindingDescr( "y",
                                              "price" );
        pattern.addConstraint( fieldBindingDescr );

        packageDescr.addGlobal( new GlobalDescr( "map",
                                                 "java.util.Map" ) );
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        final PatternDescr pattern = new PatternDescr( Cheese.class.getName(),
                                                       "stilton" );
        lhs.addDescr( pattern );

        final BindingDescr fieldBindingDescr = new BindingDescr( "x",
                                                                 "price" );
        pattern.addConstraint( fieldBindingDescr );

        final BindingDescr fieldBindingDescr2 = new BindingDescr( "y",
                                                                  "price" );
        pattern.addConstraint( fieldBindingDescr2 );

        packageDescr.addGlobal( new GlobalDescr( "map",
                                                 "java.util.Map" ) );
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        packageDescr.addRule( queryDescr );
        AndDescr lhs = new AndDescr();
        queryDescr.setLhs( lhs );
        PatternDescr pattern = new PatternDescr( Person.class.getName() );
        lhs.addDescr( pattern );
        pattern.addConstraint( new BindingDescr( "$name", "name", true ) );
        pattern.addConstraint( new BindingDescr( "$age", "age", true ) );
        pattern.addConstraint( new BindingDescr( "$likes", "likes", true ) );

        RuleDescr ruleDescr = new RuleDescr( "rule-1" );
        packageDescr.addRule( ruleDescr );
        lhs = new AndDescr();
        ruleDescr.setLhs( lhs );

        pattern = new PatternDescr( Cheese.class.getName() );
        lhs.addDescr( pattern );
        pattern.addConstraint( new BindingDescr( "$type",
                                              "type" ) );

        pattern = new PatternDescr( "query1" );
        pattern.setQuery( true );
        lhs.addDescr( pattern );
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    @Test
    public void testBuildRuleBuildContextBaseDescr() {
        // $total : Integer() from accumulate( Cheese( $price : price ) init( int x = 0; ) action( x += $price ) result( new Integer( x ) ) )
        AccumulateDescr accumDescr = new AccumulateDescr();
       
        BindingDescr price = new BindingDescr( "$price", "price" );
        PatternDescr cheeseDescr = new PatternDescr( "org.drools.compiler.Cheese" );
        cheeseDescr.addConstraint( price );
        accumDescr.setInputPattern( cheeseDescr );
       
        accumDescr.setInitCode( "int x = 0; int y = 0;" );
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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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            boolean isSimpleIdentifier = !expr.equals("true") && !expr.equals("false") &&
                                         !expr.equals("null") && expr.matches("[a-zA-Z_\\$][a-zA-Z_\\$0-9]*");

            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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        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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        DRL5Expressions.expression_return e1 = null;

        DRL5Expressions.expression_return e2 = null;


         ConstraintConnectiveDescr descr = null; BaseDescr leftDescr = null; BindingDescr binding = null;
        try {
            // src/main/resources/org/drools/lang/DRL5Expressions.g:313:3: (left= relationalExpression ( ( not_key in_key )=> not_key in= in_key LEFT_PAREN e1= expression ( COMMA e2= expression )* RIGHT_PAREN | in= in_key LEFT_PAREN e1= expression ( COMMA e2= expression )* RIGHT_PAREN )? )
            // src/main/resources/org/drools/lang/DRL5Expressions.g:313:5: left= relationalExpression ( ( not_key in_key )=> not_key in= in_key LEFT_PAREN e1= expression ( COMMA e2= expression )* RIGHT_PAREN | in= in_key LEFT_PAREN e1= expression ( COMMA e2= expression )* RIGHT_PAREN )?
            {
            pushFollow(FOLLOW_relationalExpression_in_inExpression1501);
            left=relationalExpression();

            state._fsp--;
            if (state.failed) return result;
            if ( state.backtracking==0 ) {
               if( buildDescr  ) { result = left; }
                    if( left instanceof BindingDescr ) {
                        binding = (BindingDescr)left;
                        leftDescr = new AtomicExprDescr( binding.getExpression() );
                    } else {
                        leftDescr = left;
                    }
                 
            }
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Related Classes of org.drools.compiler.lang.descr.BindingDescr

  • org.drools.compiler.builder.impl.KnowledgeBuilderTest
  • org.drools.compiler.compiler.PackageBuilderTest
  • org.drools.compiler.compiler.QueryBuilderTest
  • org.drools.compiler.compiler.xml.rules.FieldBindingHandler
  • org.drools.compiler.lang.api.impl.PatternDescrBuilderImpl
  • org.drools.compiler.lang.DRL5Expressions
  • org.drools.compiler.lang.DRL6Expressions
  • org.drools.compiler.lang.DRLExprParserTest
  • org.drools.compiler.lang.MVELDumperTest
  • org.drools.compiler.rule.builder.dialect.java.JavaAccumulateBuilderTest
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