Package edu.cornell.mannlib.vitro.webapp.dao.jena

Class QueryUtils

java.lang.Object

edu.cornell.mannlib.vitro.webapp.dao.jena.QueryUtils

public class QueryUtils
extends Object

Utilities for executing queries and working with query results.

Method Summary

Modifier and Type	Method	Description
static String	bindVariables(String queryStr, org.apache.jena.query.QuerySolution initialBindings)	The RDFService interface doesn't support initial bindings, so do text substitutions instead.
static org.apache.jena.query.ResultSet	getLanguageNeutralQueryResults(String queryStr, VitroRequest vreq)
static org.apache.jena.query.ResultSet	getQueryResults(String queryStr, VitroRequest vreq)
static org.apache.jena.query.ResultSet	getQueryResults(String queryStr, org.apache.jena.query.QuerySolution initialBindings, RDFService rdfService)
static Object	nodeToObject(org.apache.jena.rdf.model.RDFNode node)
static String	nodeToString(org.apache.jena.rdf.model.RDFNode node)
static Map<String,Object>	querySolutionToObjectValueMap(org.apache.jena.query.QuerySolution soln)
static Map<String,String>	querySolutionToStringValueMap(org.apache.jena.query.QuerySolution soln)
static List<Map<String,String>>	removeDuplicatesMapsFromList(List<Map<String,String>> rawList, String... keys)	If any pair of maps in the list has the same (non-null) value for any of these keys, call the maps duplicates and keep only the first of them.
static String	replaceQueryVar(String queryString, String varName, String newVarName)	Replace one variable name with another
static String	subUriForQueryVar(String queryString, String varName, String uri)	Manually replace a query variable with a uri when prebinding causes the query to fail, probably due to a Jena bug.
static String	subUrisForQueryVars(String queryString, Map<String,String> varsToUris)	Manually replace query variables with uris when prebinding causes the query to fail, probably due to a Jena bug.

Methods inherited from class java.lang.Object

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

Method Detail

querySolutionToObjectValueMap

public static Map<String,Object> querySolutionToObjectValueMap(org.apache.jena.query.QuerySolution soln)

querySolutionToStringValueMap

public static Map<String,String> querySolutionToStringValueMap(org.apache.jena.query.QuerySolution soln)

removeDuplicatesMapsFromList

public static List<Map<String,String>> removeDuplicatesMapsFromList(List<Map<String,String>> rawList,
                                                                          String... keys)

If any pair of maps in the list has the same (non-null) value for any of these keys, call the maps duplicates and keep only the first of them.

nodeToObject

public static Object nodeToObject(org.apache.jena.rdf.model.RDFNode node)

nodeToString

public static String nodeToString(org.apache.jena.rdf.model.RDFNode node)

subUrisForQueryVars

public static String subUrisForQueryVars(String queryString,
                                         Map<String,String> varsToUris)

Manually replace query variables with uris when prebinding causes the query to fail, probably due to a Jena bug.

subUriForQueryVar

public static String subUriForQueryVar(String queryString,
                                       String varName,
                                       String uri)

Manually replace a query variable with a uri when prebinding causes the query to fail, probably due to a Jena bug.

replaceQueryVar

public static String replaceQueryVar(String queryString,
                                     String varName,
                                     String newVarName)

Replace one variable name with another

getQueryResults

public static org.apache.jena.query.ResultSet getQueryResults(String queryStr,
                                                              VitroRequest vreq)

getQueryResults

public static org.apache.jena.query.ResultSet getQueryResults(String queryStr,
                                                              org.apache.jena.query.QuerySolution initialBindings,
                                                              RDFService rdfService)

getLanguageNeutralQueryResults

public static org.apache.jena.query.ResultSet getLanguageNeutralQueryResults(String queryStr,
                                                                             VitroRequest vreq)

bindVariables

public static String bindVariables(String queryStr,
                                   org.apache.jena.query.QuerySolution initialBindings)

The RDFService interface doesn't support initial bindings, so do text substitutions instead.