Groovy SPARQL RDFBuilder DSL

RDFDSL.groovy

@Grab('org.codehaus.groovy.sparql:groovy-sparql:0.2')
import groovy.sparql.*


/**
   Can be constructed with:
      - Outputstream 
      - PrintWriter
      - Model (all statements built will be copied into the input model
        via model.add(List<Statement>)
   
   Can register other output hooks
   builder.registerOutputHook(closure)

   If more than one output hook is registered, they're executed in parallel via GPars 

   First closure in the builder is the output type, here are the format types (mapped to Jena):
   [xml:"RDF/XML", xmlabbrev:"RDF/XML-ABBREV", ntriple:"N-TRIPLE", n3:"N3", turtle:"TURTLE"]
 
   All other root closure names are ignored, and you just get the model returned

   Vocab in the DSL is:
   defaultNamespace "namespace"
   namespace prefix:"namespace"

   subject("uri or fragment) { 
      property "predicate":object"
      property "predicate" {
       subject("uri or fragment") { 
          ....
       }
      }
   }

   You can nest subjects and properties per above, see the JUnit test for example

**/
def builder = new RDFBuilder(System.out)

// model is a Jena Model
def model = builder.n3 {
    defaultNamespace "http://www.example.org"
    namespace foaf:"http://xmlns.com/foaf/0.1"
    
    subject("#clarkkent") { 
        property "foaf:gender":"male"
        property "foaf:title":"Mr"
        property "foaf:givenname":"Clark"
        property "foaf:family_name":"Kent"
    }
}

/** 
As N3

 <http://www.example.org#clarkkent>
      <http://xmlns.com/foaf/0.1/family_name>
              "Kent" ;
      <http://xmlns.com/foaf/0.1/gender>
              "male" ;
      <http://xmlns.com/foaf/0.1/givenname>
              "Clark" ;
      <http://xmlns.com/foaf/0.1/title>
              "Mr" .
**/


model = builder.xml {
    defaultNamespace "http://www.example.org"
    namespace foaf:"http://xmlns.com/foaf/0.1"
    
    subject("#clarkkent") { 
        property "foaf:gender":"male"
        property "foaf:title":"Mr"
        property "foaf:givenname":"Clark"
        property "foaf:family_name":"Kent"
    }
} 

/**

As XML

<rdf:RDF
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:j.0="http://xmlns.com/foaf/0.1/" > 
  <rdf:Description rdf:about="http://www.example.org#clarkkent">
    <j.0:family_name>Kent</j.0:family_name>
    <j.0:givenname>Clark</j.0:givenname>
    <j.0:title>Mr</j.0:title>
    <j.0:gender>male</j.0:gender>
  </rdf:Description>
</rdf:RDF>

**/