Examples of org.drools.compiler.lang.Expander.expand()

org.drools.compiler.lang.Expander.expand()
Expands (process) the expression Just-In-Time for the parser. If the source is not meant to be expanded, or if no appropriate match was found for expansion, it will echo back the same expression. @param drl the source code to be pre-processed @return source code after running pre-processors

                              final String source,
                              final Reader dsl) throws DroolsParserException {
        DefaultExpanderResolver resolver = getDefaultResolver(dsl);


        final Expander expander = resolver.get( "*", null );
        final String expanded = expander.expand( source );
        if ( expander.hasErrors() ) {
            this.results.addAll( expander.getErrors() );
        }
        return this.parse(isEditor, expanded);
    }

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    public String getExpandedDRL(final String source,
                                 final DefaultExpanderResolver resolver) throws DroolsParserException {


        final Expander expander = resolver.get("*",
                null);
        final String expanded = expander.expand( source );
        if ( expander.hasErrors() ) {
            String err = "";
            for ( ExpanderException ex : expander.getErrors() ) {
                err = err + "\n Line:[" + ex.getLine() + "] " + ex.getMessage();

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        KObject index = null;
        try {
            final String dslr = ioService.readAllString( path );
            final Expander expander = getDSLExpander( path );
            final String drl = expander.expand( dslr );
            final DrlParser drlParser = new DrlParser();
            final PackageDescr packageDescr = drlParser.parse( true,
                                                               drl );
            if ( packageDescr == null ) {
                logger.error( "Unable to parse DRL for '" + path.toUri().toString() + "'." );

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    @Override
    public String getSource( final Path path,
                             final RuleModel model ) {
        final String dslr = RuleModelDRLPersistenceImpl.getInstance().marshal( model );
        final Expander expander = getDSLExpander( path );
        final String drl = expander.expand( dslr );
        return drl;
    }


    @Override
    public String getSource( final Path path ) {

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    @Test
    public void testMultiLineTemplates() throws Exception {
        final Reader source = new InputStreamReader( getClass().getResourceAsStream( "rule_with_expander_multiline.dslr" ) );
        final Reader dsl = new InputStreamReader( getClass().getResourceAsStream( "test_dsl_multiline.dsl" ) );
        Expander ex =  new DefaultExpanderResolver(dsl).get("*", null);
        String r = ex.expand(source);
        assertEquals("when Car(color==\"Red\") then doSomething();", r.trim());
    }


    @Test
    public void testWithExpanderDSL() throws Exception {

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                              final String source,
                              final Reader dsl) throws DroolsParserException {
        DefaultExpanderResolver resolver = getDefaultResolver(dsl);


        final Expander expander = resolver.get( "*", null );
        final String expanded = expander.expand( source );
        if ( expander.hasErrors() ) {
            this.results.addAll( expander.getErrors() );
        }
        return this.parse(isEditor, expanded);
    }

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    public String getExpandedDRL(final String source,
                                 final DefaultExpanderResolver resolver) throws DroolsParserException {


        final Expander expander = resolver.get("*",
                null);
        final String expanded = expander.expand( source );
        if ( expander.hasErrors() ) {
            String err = "";
            for ( ExpanderException ex : expander.getErrors() ) {
                err = err + "\n Line:[" + ex.getLine() + "] " + ex.getMessage();

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        KObject index = null;
        try {
            final String dslr = ioService.readAllString( path );
            final Expander expander = getDSLExpander( path );
            final String drl = expander.expand( dslr );
            final DrlParser drlParser = new DrlParser();
            final PackageDescr packageDescr = drlParser.parse( true,
                                                               drl );
            if ( packageDescr == null ) {
                logger.error( "Unable to parse DRL for '" + path.toUri().toString() + "'." );

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    @Test
    public void testMultiLineTemplates() throws Exception {
        final Reader source = new InputStreamReader( getClass().getResourceAsStream( "rule_with_expander_multiline.dslr" ) );
        final Reader dsl = new InputStreamReader( getClass().getResourceAsStream( "test_dsl_multiline.dsl" ) );
        Expander ex =  new DefaultExpanderResolver(dsl).get("*", null);
        String r = ex.expand(source);
        assertEquals("when Car(color==\"Red\") then doSomething();", r.trim());
    }


    @Test
    public void testWithExpanderDSL() throws Exception {

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    @Override
    public String getSource( final Path path,
                             final RuleModel model ) {
        final String dslr = RuleModelDRLPersistenceImpl.getInstance().marshal( model );
        final Expander expander = getDSLExpander( path );
        final String drl = expander.expand( dslr );
        return drl;
    }


    @Override
    public String getSource( final Path path ) {

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