Examples with CommandAssemblerException org.apache.jena.sdb.assembler.CommandAssemblerException used on opensource projects

Example 1 with CommandAssemblerException

use of org.apache.jena.sdb.assembler.CommandAssemblerException in project jena by apache.

the class CmdDescAssembler method open.

/* This SPARQL query will process arguments 
PREFIX acmd:     <http://jena.hpl.hp.com/2007/sdb#>
PREFIX rdf:      <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX list:    <http://jena.apache.org/ARQ/list#>

SELECT ?name ?value
{ ?x rdf:type acmd:Cmd ;
     acmd:args ?args .

  { ?args list:member [ acmd:name ?name  ; acmd:value  ?value ] }
UNION
  { ?args list:member ?e .
    OPTIONAL { ?e acmd:name ?name }
    FILTER (!bound(?name)) .
    ?e acmd:value ?value .
  }
UNION
  { ?args list:member ?value . FILTER isLiteral(?value) }
}     
     */
@Override
public Object open(Assembler a, Resource root, Mode mode) {
    CmdDesc cd = new CmdDesc();
    String main = GraphUtils.getStringValue(root, AssemblerVocab.pMain);
    if (main == null)
        main = GraphUtils.getStringValue(root, AssemblerVocab.pClassname);
    cd.setCmd(main);
    Resource x = GraphUtils.getResourceValue(root, AssemblerVocab.pArgs);
    if (x != null) {
        for (; !x.equals(RDF.nil); ) {
            RDFNode e = x.getRequiredProperty(RDF.first).getObject();
            // Move to next list item
            x = x.getRequiredProperty(RDF.rest).getResource();
            // Either : a literal or a named pair.
            if (e.isLiteral()) {
                cd.addPosn(((Literal) e).getString());
                continue;
            }
            Resource entry = (Resource) e;
            String name = GraphUtils.getStringValue(entry, AssemblerVocab.pArgName);
            String value = GraphUtils.getStringValue(entry, AssemblerVocab.pArgValue);
            if (value == null)
                throw new CommandAssemblerException(entry, "Strange entry: " + entry);
            if (name != null)
                cd.addNamedArg(name, value);
            else
                cd.addPosn(value);
        }
    }
    return cd;
}