14.16. Stringing DSL Transformation Functions

Expand

Name Description Example

.dsl

Table 14.6. Stringing DSL Transformation Functions
Name	Description	Example
.dsl	A file containing a DSL definition is customarily given the extension `.dsl`. It is passed to the Knowledge Builder with `ResourceType.DSL`. For a file using DSL definition, the extension `.dslr` should be used. The Knowledge Builder expects `ResourceType.DSLR`. The IDE, however, relies on file extensions to correctly recognize and work with your rules file.	`# definitions for conditions [when][]There is an? {entity}=${entity!lc}: {entity!ucfirst}() [when][]- with an? {attr} greater than {amount}={attr} <= {amount!num} [when][]- with a {what} {attr}={attr} {what!positive?>0/negative?%lt;0/zero?==0/ERROR}` Copy to Clipboard Toggle word wrap
DSL passing	The DSL must be passed to the Knowledge Builder ahead of any rules file using the DSL. For parsing and expanding a DSLR file the DSL configuration is read and supplied to the parser. Thus, the parser can "recognize" the DSL expressions and transform them into native rule language expressions.	`KnowledgeBuilder kBuilder = new KnowledgeBuilder(); Resource dsl = ResourceFactory.newClassPathResource( dslPath, getClass() ); kBuilder.add( dsl, ResourceType.DSL ); Resource dslr = ResourceFactory.newClassPathResource( dslrPath, getClass() ); kBuilder.add( dslr, ResourceType.DSLR );` Copy to Clipboard Toggle word wrap

A file containing a DSL definition is customarily given the extension .dsl. It is passed to the Knowledge Builder with ResourceType.DSL. For a file using DSL definition, the extension .dslr should be used. The Knowledge Builder expects ResourceType.DSLR. The IDE, however, relies on file extensions to correctly recognize and work with your rules file.

definitions for conditions

# definitions for conditions
[when][]There is an? {entity}=${entity!lc}: {entity!ucfirst}()
[when][]- with an? {attr} greater than {amount}={attr} <= {amount!num}
[when][]- with a {what} {attr}={attr} {what!positive?>0/negative?%lt;0/zero?==0/ERROR}

Copy to Clipboard

Toggle word wrap

DSL passing

The DSL must be passed to the Knowledge Builder ahead of any rules file using the DSL.

For parsing and expanding a DSLR file the DSL configuration is read and supplied to the parser. Thus, the parser can "recognize" the DSL expressions and transform them into native rule language expressions.

KnowledgeBuilder kBuilder = new KnowledgeBuilder();
Resource dsl = ResourceFactory.newClassPathResource( dslPath, getClass() );
kBuilder.add( dsl, ResourceType.DSL );
Resource dslr = ResourceFactory.newClassPathResource( dslrPath, getClass() );
kBuilder.add( dslr, ResourceType.DSLR );

KnowledgeBuilder kBuilder = new KnowledgeBuilder();
Resource dsl = ResourceFactory.newClassPathResource( dslPath, getClass() );
kBuilder.add( dsl, ResourceType.DSL );
Resource dslr = ResourceFactory.newClassPathResource( dslrPath, getClass() );
kBuilder.add( dslr, ResourceType.DSLR );

Copy to Clipboard

Toggle word wrap

Report a bug

Nach oben

Dieser Inhalt ist in der von Ihnen ausgewählten Sprache nicht verfügbar.

14.16. Stringing DSL Transformation Functions

Lernen

Testen, kaufen und verkaufen

Communitys

Über Red Hat Dokumentation

Mehr Inklusion in Open Source

Über Red Hat

Theme

Red Hat legal and privacy links

Red Hat legal and privacy links