Package org.aksw.r2rml.jena.jdbc.util

Class JdbcUtils

java.lang.Object

org.aksw.r2rml.jena.jdbc.util.JdbcUtils

public class JdbcUtils
extends Object

Constructor Summary

Constructors

Constructor	Description
JdbcUtils()

Method Summary

Modifier and Type	Method	Description
static BindingMapper	createBindingMapper(Map<org.apache.jena.sparql.core.Var,Integer> colNameToIdx, Function<int[],NodeMapper> nodeMapperFactory, Set<org.apache.jena.sparql.core.Var> nullableVars)
static BindingMapper	createDefaultBindingMapper(ResultSetMetaData rsmd, Map<org.apache.jena.sparql.core.Var,String> usedVarToColumnName, Set<org.apache.jena.sparql.core.Var> nullableVars)
static NodeMapper	createNodeMapper(ResultSetMetaData rsmd, int[] usedIdxs, SqlTypeMapper sqlTypeMapper)	Create an array of node mappers whose size matches the number of columns + 1.
static NodeMapper	createNodeMapper(ResultSetMetaData rsmd, SqlTypeMapper sqlTypeMapper)	Creates node mapper for every column
static Map<org.apache.jena.sparql.core.Var,Integer>	createVarMapping(ResultSetMetaData rsmd, Map<org.apache.jena.sparql.core.Var,String> usedVarToColumnName)
static <K, V, M extends Map<K, V>> M	putNew(M map, K k, V v)	Wrapper for Map.put(Object, Object) that raises a RuntimeException upon reassignment of a key.

Methods inherited from class java.lang.Object

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

Constructor Details

JdbcUtils

public JdbcUtils()

Method Details

createNodeMapper

public static NodeMapper createNodeMapper(ResultSetMetaData rsmd,
 int[] usedIdxs,
 SqlTypeMapper sqlTypeMapper)
                                   throws SQLException

Create an array of node mappers whose size matches the number of columns + 1. The first entry is always null because SQL column indices start with 1. Node mappers are only created for columns referred to by usedIdxs. Hence, the resulting array may have additional null entries.

Parameters:

rsmd - ResultSetMetadata

usedIdxs - The indices for which to create node mappers

sqlTypeMapper - SQL-to-RDF type mappings

Returns:

Throws:

SQLException

createNodeMapper

public static NodeMapper createNodeMapper(ResultSetMetaData rsmd,
 SqlTypeMapper sqlTypeMapper)
                                   throws SQLException

Creates node mapper for every column

Throws:

SQLException

putNew

public static <K,
V,
M extends Map<K,
V>> M putNew(M map,
 K k,
 V v)

Wrapper for Map.put(Object, Object) that raises a RuntimeException upon reassignment of a key.

createVarMapping

public static Map<org.apache.jena.sparql.core.Var,Integer> createVarMapping(ResultSetMetaData rsmd,
 Map<org.apache.jena.sparql.core.Var,String> usedVarToColumnName)
                                                                     throws SQLException

Throws:

SQLException

createDefaultBindingMapper

public static BindingMapper createDefaultBindingMapper(ResultSetMetaData rsmd,
 Map<org.apache.jena.sparql.core.Var,String> usedVarToColumnName,
 Set<org.apache.jena.sparql.core.Var> nullableVars)
                                                throws SQLException

Throws:

SQLException

createBindingMapper

public static BindingMapper createBindingMapper(Map<org.apache.jena.sparql.core.Var,Integer> colNameToIdx,
 Function<int[],NodeMapper> nodeMapperFactory,
 Set<org.apache.jena.sparql.core.Var> nullableVars)
                                         throws SQLException

Throws:

SQLException