Examples of org.drools.compiler.Dialect

org.drools.compiler.Dialect
A Dialect implementation handles the building and execution of code expressions and blocks for a rule. This api is considered unstable, and subject to change. Those wishing to implement their own dialects should look ove the MVEL and Java dialect implementations.

      super.build(process, processDescr, context, node);
        ActionNode actionNode = ( ActionNode ) node;
        DroolsConsequenceAction action = (DroolsConsequenceAction) actionNode.getAction();
        ActionDescr actionDescr = new ActionDescr();
        actionDescr.setText( action.getConsequence() );   
        Dialect dialect = context.getDialectRegistry().getDialect( action.getDialect() );            
        dialect.getActionBuilder().build( context, action, actionDescr, (NodeImpl) node );
    }

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    public EvaluatorWrapper wrapEvaluator( Evaluator evaluator, Declaration left, Declaration right ) {
        return new EvaluatorWrapper( evaluator, left, right );
    }


    public MVELCompilationUnit buildCompilationUnit(RuleBuildContext context, Pattern pattern, String expression, Map<String, OperatorDescr> aliases) {
        Dialect dialect = context.getDialect();
        context.setDialect( context.getDialect( "mvel" ) );


        PredicateDescr predicateDescr = new PredicateDescr( context.getRuleDescr().getResource(), expression );
        AnalysisResult analysis = buildAnalysis(context, pattern, predicateDescr, aliases);
        if ( analysis == null ) {

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    protected void createAndBuildPredicate( RuleBuildContext context,
                                          Pattern pattern,
                                          BaseDescr base,
                                          String expr,
                                          Map<String, OperatorDescr> aliases ) {
        Dialect dialect = context.getDialect();
        MVELDialect mvelDialect = (MVELDialect) context.getDialect( "mvel" );
        context.setDialect( mvelDialect );


        PredicateDescr pdescr = new PredicateDescr( context.getRuleDescr().getResource(), expr );
        pdescr.copyParameters( base );

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            if ( target != null ) {
                target.setReadAccessor( reader );
            }
        } else if ( fieldName.indexOf( '.' ) > -1 || fieldName.indexOf( '[' ) > -1 || fieldName.indexOf( '(' ) > -1 ) {
            // we need MVEL extractor for expressions
            Dialect dialect = context.getDialect();
            try {
                MVELDialect mvelDialect = (MVELDialect) context.getDialect( "mvel" );
                context.setDialect( mvelDialect );


                Map<String, Class< ? >> declarations = getDeclarationsMap( descr,

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                splitNode.setConstraint( outgoingConnection, returnValueConstraint );            
                
                ReturnValueDescr returnValueDescr = new ReturnValueDescr();
                returnValueDescr.setText( constraint.getConstraint() );
                
                Dialect dialect = context.getDialectRegistry().getDialect( constraint.getDialect() );                               
                dialect.getReturnValueEvaluatorBuilder().build( context, returnValueConstraint, returnValueDescr );
            }
        }
    }

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    protected void buildAction(DroolsAction droolsAction, ProcessBuildContext context) {
      DroolsConsequenceAction action = (DroolsConsequenceAction) droolsAction;
        ActionDescr actionDescr = new ActionDescr();
        actionDescr.setText( action.getConsequence() );   
        Dialect dialect = context.getDialectRegistry().getDialect( action.getDialect() );            
        dialect.getActionBuilder().build( context, action, actionDescr );
    }

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      super.build(process, processDescr, context, node);
        ActionNode actionNode = ( ActionNode ) node;
        DroolsConsequenceAction action = (DroolsConsequenceAction) actionNode.getAction();
        ActionDescr actionDescr = new ActionDescr();
        actionDescr.setText( action.getConsequence() );   
        Dialect dialect = context.getDialectRegistry().getDialect( action.getDialect() );            
        dialect.getActionBuilder().build( context, action, actionDescr );
    }

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    private void rewriteToEval(final RuleBuildContext context,
                               final Pattern pattern,
                               final FieldConstraintDescr fieldConstraintDescr,
                               final AbstractCompositeConstraint container) {
        // it is a complex expression, so we need to turn it into an MVEL predicate
        Dialect dialect = context.getDialect();
        // switch to MVEL dialect
        MVELDialect mvelDialect = (MVELDialect) context.getDialect( "mvel" );
        boolean strictMode = mvelDialect.isStrictMode();
        mvelDialect.setStrictMode( false );
        context.setDialect( mvelDialect );

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        if ( this.rule.getDialect() == null ) {
            this.rule.setDialect( getDialect().getId() );
        }


        Dialect dialect = getDialect();
        if ( dialect != null ) {
            dialect.init( ruleDescr );
        } 
        
      
    }

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Related Classes of org.drools.compiler.Dialect

org.drools.process.builder.ActionNodeBuilder

org.drools.process.builder.ExtendedNodeBuilder

org.drools.process.builder.SplitNodeBuilder

org.drools.process.builder.StoreNodeBuilder

org.drools.rule.builder.ConstraintBuilder

org.drools.rule.builder.dialect.java.JavaAccumulateBuilderTest

org.drools.rule.builder.dialect.java.RuleBuilderTest

org.drools.rule.builder.dialect.mvel.MVELConsequenceBuilderTest

org.drools.rule.builder.MVELConstraintBuilder

org.drools.rule.builder.PatternBuilder

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