Examples of org.drools.lang.dsl.DefaultExpander

org.drools.lang.dsl.DefaultExpander
The default expander uses String templates to provide pseudo natural language, as well as general DSLs. For most people, this should do the job just fine.

    }


    public void testExpanderErrorsAfterExpansion() throws Exception {


        final String name = "expander_post_errors.dslr";
        final Expander expander = new DefaultExpander();
        final String expanded = expander.expand( this.getReader( name ) );


        final DRLParser parser = parse( name,
                                        expanded );
        parser.compilation_unit();
        assertTrue( parser.hasErrors() );

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    public void addPackageFromDslr(final Resource resource) throws DroolsParserException,
                                                             IOException {
        this.resource = resource;


        final DrlParser parser = new DrlParser();
        DefaultExpander expander = getDslExpander();


        try {
            if ( expander == null ) {
                expander = new DefaultExpander();
            }
            String str = expander.expand( resource.getReader() );
            if ( expander.hasErrors() ) {
                this.results.addAll( expander.getErrors() );
            }


            final PackageDescr pkg = parser.parse( str );
            this.results.addAll( parser.getErrors() );
            if ( !parser.hasErrors() ) {

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            Reader knowledge = provider.getKnowledgeReader( resource );


            DrlParser parser = new DrlParser();


            if ( provider.hasDSLSentences() ) {
                DefaultExpander expander = getDslExpander();


                if ( null != expander ) {
                    knowledge = new StringReader( expander.expand( knowledge ) );
                    if ( expander.hasErrors() ) this.results.addAll( expander.getErrors() );
                }
            }


            PackageDescr pkg = parser.parse( knowledge );
            if ( parser.hasErrors() ) {

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    /**
     * Returns an expander for DSLs (only if there is a DSL configured for this
     * package).
     */
    public DefaultExpander getDslExpander() {
        DefaultExpander expander = new DefaultExpander();
        if ( this.dslFiles == null || this.dslFiles.isEmpty() ) {
            return null;
        }
        for ( DSLMappingFile file : this.dslFiles ) {
            expander.addDSLMapping( file.getMapping() );
        }
        return expander;
    }

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    PackageDescr dslrToPackageDescr(Resource resource) throws DroolsParserException {
        boolean hasErrors;
        PackageDescr pkg;


        DrlParser parser = new DrlParser();
        DefaultExpander expander = getDslExpander();


        Reader reader = null;
        try {
            if (expander == null) {
                expander = new DefaultExpander();
            }
            reader = resource.getReader();
            String str = expander.expand( reader );
            if (expander.hasErrors()) {
                this.results.addAll( expander.getErrors() );
            }


            pkg = parser.parse( str );
            this.results.addAll( parser.getErrors() );
            hasErrors = parser.hasErrors();

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        Reader knowledge = provider.getKnowledgeReader( resource );


        DrlParser parser = new DrlParser();


        if (provider.hasDSLSentences()) {
            DefaultExpander expander = getDslExpander();


            if (null != expander) {
                knowledge = new StringReader( expander.expand( knowledge ) );
                if (expander.hasErrors())
                    this.results.addAll( expander.getErrors() );
            }
        }


        PackageDescr pkg = parser.parse( knowledge );
        if (parser.hasErrors()) {

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    /**
     * Returns an expander for DSLs (only if there is a DSL configured for this
     * package).
     */
    public DefaultExpander getDslExpander() {
        DefaultExpander expander = new DefaultExpander();
        if (this.dslFiles == null || this.dslFiles.isEmpty()) {
            return null;
        }
        for (DSLMappingFile file : this.dslFiles) {
            expander.addDSLMapping( file.getMapping() );
        }
        return expander;
    }

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              + this.srcdir.getAbsolutePath());
    }


    for (int index = 0; index < children.length; index++) {
      if (file.parseAndLoad(new StringReader(loadResource(children[index])))) {
        final Expander expander = new DefaultExpander();
        expander.addDSLMapping(file.getMapping());
        resolver.addExpander("*", expander);
      } else {
        throw new RuntimeDroolsException(
            "Error parsing and loading DSL file."
                + file.getErrors());

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                BusinessRuleProvider provider = new BusinessRuleProviderDefaultImpl();


                Reader knowledge = provider.getKnowledgeReader( resource );


                DrlParser parser = new DrlParser();
                DefaultExpander expander = getDslExpander();


                if ( null != expander ) {
                    knowledge = new StringReader( expander.expand( knowledge ) );
                    if ( expander.hasErrors() ) {
                        getErrors().addAll( expander.getErrors() );
                    }
                }


                PackageDescr pkg = parser.parse( knowledge );
                if ( parser.hasErrors() ) {

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    @Test
    public void testExpanderErrorsAfterExpansion() throws Exception {


        final String name = "expander_post_errors.dslr";
        final Expander expander = new DefaultExpander();
        final String expanded = expander.expand( this.getReader( name ) );
        
        final DRLParser parser = parse( name,
                                        expanded );
        parser.compilationUnit();
        assertTrue( parser.hasErrors() );

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