Module org.apache.jena.arq

Package org.apache.jena.sparql.util

Class QueryExecUtils

java.lang.Object

org.apache.jena.sparql.util.QueryExecUtils

public class QueryExecUtils
extends Object

Some utilities for query processing.

Constructor Summary

Constructors

Constructor	Description
QueryExecUtils()

Method Summary

Modifier and Type	Method	Description
static void	exec(Query query, DatasetGraph dsg)
static void	exec(Prologue prologue, QueryExec queryExec)
static void	exec(Prologue prologue, QueryExec queryExec, ResultsFormat outputFormat)
static void	exec(Prologue prologue, QueryExec queryExec, ResultsFormat outputFormat, PrintStream output)
static void	exec(QueryExec queryExec)
static void	execute(Op op, DatasetGraph dsg)
static void	execute(Op op, DatasetGraph dsg, ResultsFormat outputFormat)
static void	execute(Op op, DatasetGraph dsg, ResultsFormat outputFormat, PrintStream output)
static void	executeQuery(QueryExecution queryExecution)
static void	executeQuery(Prologue prologue, QueryExecution queryExecution)
static void	executeQuery(Prologue prologue, QueryExecution queryExecution, ResultsFormat outputFormat)
static void	executeQuery(Prologue prologue, QueryExecution queryExecution, ResultsFormat outputFormat, PrintStream output)
static List<org.apache.jena.rdf.model.RDFNode>	getAll(QueryExecution qExec, String varname)	Execute, returning all matches, which may be zero.
static org.apache.jena.rdf.model.RDFNode	getAtMostOne(QueryExecution qExec, String varname)	Execute, expecting the result to be one row, one column.
static org.apache.jena.rdf.model.RDFNode	getExactlyOne(String qs, Dataset ds)	Execute a query, expecting the result to be one row, one column.
static org.apache.jena.rdf.model.RDFNode	getExactlyOne(String qs, org.apache.jena.rdf.model.Model model)	Execute a query, expecting the result to be one row, one column.
static org.apache.jena.rdf.model.RDFNode	getExactlyOne(QueryExecution qExec, String varname)	Execute, expecting the result to be one row, one column.
static void	outputResultSet(ResultSet results, Prologue prologue, ResultsFormat outputFormat, PrintStream output)

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

QueryExecUtils

public QueryExecUtils()

Method Details

exec

public static void exec(Query query,
 DatasetGraph dsg)

exec

public static void exec(QueryExec queryExec)

exec

public static void exec(Prologue prologue,
 QueryExec queryExec)

exec

public static void exec(Prologue prologue,
 QueryExec queryExec,
 ResultsFormat outputFormat)

exec

public static void exec(Prologue prologue,
 QueryExec queryExec,
 ResultsFormat outputFormat,
 PrintStream output)

executeQuery

public static void executeQuery(QueryExecution queryExecution)

executeQuery

public static void executeQuery(Prologue prologue,
 QueryExecution queryExecution)

executeQuery

public static void executeQuery(Prologue prologue,
 QueryExecution queryExecution,
 ResultsFormat outputFormat)

executeQuery

public static void executeQuery(Prologue prologue,
 QueryExecution queryExecution,
 ResultsFormat outputFormat,
 PrintStream output)

execute

public static void execute(Op op,
 DatasetGraph dsg)

execute

public static void execute(Op op,
 DatasetGraph dsg,
 ResultsFormat outputFormat)

execute

public static void execute(Op op,
 DatasetGraph dsg,
 ResultsFormat outputFormat,
 PrintStream output)

outputResultSet

public static void outputResultSet(ResultSet results,
 Prologue prologue,
 ResultsFormat outputFormat,
 PrintStream output)

getExactlyOne

public static org.apache.jena.rdf.model.RDFNode getExactlyOne(String qs,
 org.apache.jena.rdf.model.Model model)

Execute a query, expecting the result to be one row, one column. Return that one RDFNode

getExactlyOne

public static org.apache.jena.rdf.model.RDFNode getExactlyOne(String qs,
 Dataset ds)

Execute a query, expecting the result to be one row, one column. Return that one RDFNode

getExactlyOne

public static org.apache.jena.rdf.model.RDFNode getExactlyOne(QueryExecution qExec,
 String varname)

Execute, expecting the result to be one row, one column. Return that one. RDFNode or throw an exception. Use with try ( QueryExecution qExec = ....).

getAtMostOne

public static org.apache.jena.rdf.model.RDFNode getAtMostOne(QueryExecution qExec,
 String varname)

Execute, expecting the result to be one row, one column. Return that one RDFNode or null. Throw exception if more than one. Use with try ( QueryExecution qExec = ....).

getAll

public static List<org.apache.jena.rdf.model.RDFNode> getAll(QueryExecution qExec,
 String varname)

Execute, returning all matches, which may be zero.