org.aksw.sparqlify.core

Class DatatypeSystemDefault

java.lang.Object

org.aksw.sparqlify.core.DatatypeSystemDefault

All Implemented Interfaces:

DatatypeSystemOld

public class DatatypeSystemDefault
extends Object
implements DatatypeSystemOld

Field Summary

Fields

Modifier and Type	Field and Description
static SqlDatatype	_BOOLEAN
static SqlDatatype	_BYTE
static SqlDatatype	_DATE
static SqlDatatype	_DATE_TIME
static SqlDatatype	_DECIMAL
static SqlDatatype	_DOUBLE
static SqlDatatype	_FLOAT
static SqlDatatype	_GEOGRAPHY
static SqlDatatype	_GEOMETRY
static SqlDatatype	_INT
static SqlDatatype	_INTEGER
static SqlDatatype	_LONG
static SqlDatatype	_NEGATIVE_INTEGER
static SqlDatatype	_NON_NEGATIVE_INTEGER
static SqlDatatype	_NON_POSITIVE_INTEGER
static SqlDatatype	_NUMERIC
static SqlDatatype	_POSITIVE_INTEGER
static SqlDatatype	_SHORT
static SqlDatatype	_STRING
static SqlDatatype	_UNSIGNED_BYTE
static SqlDatatype	_UNSIGNED_INT
static SqlDatatype	_UNSIGNED_LONG
static SqlDatatype	_UNSIGNED_SHORT
static org.aksw.commons.collections.multimaps.IBiSetMultimap<SqlDatatype,SqlDatatype>	childToParent
static org.slf4j.Logger	logger

Constructor Summary

Constructors

Constructor and Description
DatatypeSystemDefault()

Method Summary

Methods

Modifier and Type	Method and Description
Object	cast(Object value, SqlDatatype to)
Factory1<SqlExpr>	cast(SqlDatatype from, SqlDatatype to) Return a factory for creating cast-expressions between the given datatypes Null if no such cast exists.
Integer	compare(SqlDatatype a, SqlDatatype b) Returns -1, 0, 1 if a is more specific, equal, more general the b.
static SqlDatatype	dt(String name)
static SqlDatatype	dt(String name, com.hp.hpl.jena.rdf.model.Resource resource)
static SqlDatatype	dt(String name, com.hp.hpl.jena.rdf.model.Resource resource, Class<?> clazz)
SqlDatatype	getByClass(Class<?> clazz)
SqlDatatype	getByName(String name)
SqlDatatype	getDatatype(String name)
static List<SqlDatatype>	getDefaultDatatypes()
Set<String>	getRegisteredDatatypes() Returns all registered datatype names.
static void	main(String[] args)
SqlDatatype	mostGenericDatatype(SqlDatatype from, SqlDatatype to) Returns the top-most node of the tree of compatible datatypes Hm, how to justify not returning object? so integer and string -> numeric string -> text The rationale is, that all numeric types have similar semantics in regard to comparison and arithmetic operations.
void	registerDatatype(String name, SqlDatatype datatype)
SqlDatatype	requireByName(String name)
Set<SqlDatatype>	supremumDatatypes(SqlDatatype a, SqlDatatype b)

Methods inherited from class java.lang.Object

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

Field Detail

logger

public static final org.slf4j.Logger logger

_BYTE

public static final SqlDatatype _BYTE

_SHORT

public static final SqlDatatype _SHORT

_INT

public static final SqlDatatype _INT

_LONG

public static final SqlDatatype _LONG

_INTEGER

public static final SqlDatatype _INTEGER

_DECIMAL

public static final SqlDatatype _DECIMAL

_UNSIGNED_BYTE

public static final SqlDatatype _UNSIGNED_BYTE

_UNSIGNED_SHORT

public static final SqlDatatype _UNSIGNED_SHORT

_UNSIGNED_INT

public static final SqlDatatype _UNSIGNED_INT

_UNSIGNED_LONG

public static final SqlDatatype _UNSIGNED_LONG

_POSITIVE_INTEGER

public static final SqlDatatype _POSITIVE_INTEGER

_NON_NEGATIVE_INTEGER

public static final SqlDatatype _NON_NEGATIVE_INTEGER

_NON_POSITIVE_INTEGER

public static final SqlDatatype _NON_POSITIVE_INTEGER

_NEGATIVE_INTEGER

public static final SqlDatatype _NEGATIVE_INTEGER

_FLOAT

public static final SqlDatatype _FLOAT

_DOUBLE

public static final SqlDatatype _DOUBLE

_NUMERIC

public static final SqlDatatype _NUMERIC

_BOOLEAN

public static final SqlDatatype _BOOLEAN

_DATE

public static final SqlDatatype _DATE

_DATE_TIME

public static final SqlDatatype _DATE_TIME

_STRING

public static final SqlDatatype _STRING

_GEOMETRY

public static final SqlDatatype _GEOMETRY

_GEOGRAPHY

public static final SqlDatatype _GEOGRAPHY

childToParent

public static final org.aksw.commons.collections.multimaps.IBiSetMultimap<SqlDatatype,SqlDatatype> childToParent

Constructor Detail

DatatypeSystemDefault

public DatatypeSystemDefault()

Method Detail

dt

public static SqlDatatype dt(String name)

dt

public static SqlDatatype dt(String name,
             com.hp.hpl.jena.rdf.model.Resource resource)

dt

public static SqlDatatype dt(String name,
             com.hp.hpl.jena.rdf.model.Resource resource,
             Class<?> clazz)

getDefaultDatatypes

public static List<SqlDatatype> getDefaultDatatypes()

getByName

public SqlDatatype getByName(String name)

Specified by:

getByName in interface DatatypeSystemOld

requireByName

public SqlDatatype requireByName(String name)

Specified by:

requireByName in interface DatatypeSystemOld

getRegisteredDatatypes

public Set<String> getRegisteredDatatypes()

Returns all registered datatype names. This can be used to check whether in an external mapping a proper vendor specific name exists for each of them.

Returns:

registerDatatype

public void registerDatatype(String name,
                    SqlDatatype datatype)

getDatatype

public SqlDatatype getDatatype(String name)

cast

public Object cast(Object value,
          SqlDatatype to)

Specified by:

cast in interface DatatypeSystemOld

cast

public Factory1<SqlExpr> cast(SqlDatatype from,
                     SqlDatatype to)

Description copied from interface: DatatypeSystemOld

Return a factory for creating cast-expressions between the given datatypes Null if no such cast exists. Constant folding may be performed, but do not rely on it. So cast(string, int).create(NodeValue.makeString('666')) may return Cast((string, int), NodeValue('666')) rather than NodeValue.makeInteger(666)

Specified by:

cast in interface DatatypeSystemOld

mostGenericDatatype

public SqlDatatype mostGenericDatatype(SqlDatatype from,
                              SqlDatatype to)

Description copied from interface: DatatypeSystemOld

Returns the top-most node of the tree of compatible datatypes Hm, how to justify not returning object? so integer and string -> numeric string -> text The rationale is, that all numeric types have similar semantics in regard to comparison and arithmetic operations. However mixing string and numeric is invalid.

Specified by:

mostGenericDatatype in interface DatatypeSystemOld

Returns:

supremumDatatypes

public Set<SqlDatatype> supremumDatatypes(SqlDatatype a,
                                 SqlDatatype b)

Specified by:

supremumDatatypes in interface DatatypeSystemOld

compare

public Integer compare(SqlDatatype a,
              SqlDatatype b)

Description copied from interface: DatatypeSystemOld

Returns -1, 0, 1 if a is more specific, equal, more general the b. null if no subsumption relation exists

Specified by:

compare in interface DatatypeSystemOld

Returns:

main

public static void main(String[] args)

getByClass

public SqlDatatype getByClass(Class<?> clazz)

Specified by:

getByClass in interface DatatypeSystemOld