[jira] [Created] (JENA-2242) Include VALUES clause in string when stringifying a WhereBuilder

[Kelvin Qian (Jira)]

Kelvin Qian created JENA-2242:
---------------------------------

             Summary: Include VALUES clause in string when stringifying a 
WhereBuilder
                 Key: JENA-2242
                 URL: https://issues.apache.org/jira/browse/JENA-2242
             Project: Apache Jena
          Issue Type: Improvement
          Components: QueryBuilder
    Affects Versions: Jena 4.3.2
            Reporter: Kelvin Qian
            Assignee: Claude Warren


Currently when stringifying a WhereBuilder (e.g. for debugging), any VALUES 
clause is not included in the output of .toString:
{code:java}
import java.util.HashMap;

import org.apache.jena.graph.Node;
import org.apache.jena.grpah.Triple;
import org.apache.jena.arq.querybuilder.Converters;

import org.apache.jena.arq.querybuilder.WhereBuilder;
 
// Node creation
Node svarNode = Converters.checkVar(NodeFactory.createVariable("s"));
Node pvarNode = Converters.checkVar(NodeFactory.createVariable("p"));
Node ovarNode = Converters.checkVar(NodeFactory.createVariable("o"));

// Values map creation
ArrayList<Node> subjColl = new ArrayList<>();
subjColl.add(NodeFactory.createURI("http://example.org#subject";));

HashMap<Node, ArrayList<Node>> valMap = new HashMap<>();
valMap.put(svarNode, subjColl);

// WhereBuilder creation
WhereBuilder wb = new WhereBuilder();
wb.addWhere(svarNode, pvarNode, ovarNode);
wb.addWhereValueVars(valMap);

wb.toString();

// WHERE { ?s ?p ?o }
{code}
It is only when you add the WhereBuilder to another builder, e.g. a 
ConstructBuilder, when you are able to visualize the VALUES clause:
{code:java}
import org.apache.jena.arq.querybuilder.ConstructBuilder;

ConstructBuilder cb = new ConstructBuilder();
cb.addConstruct(new Triple(svarNode, pvarNode, ovarNode));
cb.addWhere(wb);

cb.toString();

// CONSTRUCT 
//   { 
//     ?s ?p ?o .
//   }
// WHERE
//   { ?s  ?p  ?o
//    VALUES ( ?s ) { ( <http://example.org#subject> ) }
//   }
{code}
Ideally we would like to visualize the VALUES clause by including it in the 
result string while stringifying the WhereBuilder, not just with the 
ConstructBuilder.



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