de.fuberlin.wiwiss.d2rq.sql.types

Class SQLApproximateNumeric

java.lang.Object

de.fuberlin.wiwiss.d2rq.sql.types.DataType

de.fuberlin.wiwiss.d2rq.sql.types.SQLApproximateNumeric

Direct Known Subclasses:

HSQLDB.HSQLDBCompatibilityDoubleDataType

public class SQLApproximateNumeric
extends DataType

Nested Class Summary

Nested classes/interfaces inherited from class de.fuberlin.wiwiss.d2rq.sql.types.DataType

DataType.GenericType

Field Summary

Fields inherited from class de.fuberlin.wiwiss.d2rq.sql.types.DataType

log

Constructor Summary

Constructors

Constructor and Description
SQLApproximateNumeric(Vendor syntax, String name)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	isIRISafe()
String	rdfType() Return the appropriate RDF datatype for a SQL data type.
String	toSQLLiteral(String value) Creates a SQL literal for the given value, suitable for comparison to a column of this indicated type.
String	value(ResultSet resultSet, int column) Retrieves a string value in preferred format (canonical form of the closest XSD type) from a SQL ResultSet.

Methods inherited from class de.fuberlin.wiwiss.d2rq.sql.types.DataType

isUnsupported, name, supportsDistinct, syntax, toString, valueRegex

Methods inherited from class java.lang.Object

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

Constructor Detail

SQLApproximateNumeric

public SQLApproximateNumeric(Vendor syntax,
                     String name)

Method Detail

isIRISafe

public boolean isIRISafe()

Overrides:

isIRISafe in class DataType

rdfType

public String rdfType()

Description copied from class: DataType

Return the appropriate RDF datatype for a SQL data type. null indicates a known SQL type that cannot be mapped to RDF.

Overrides:

rdfType in class DataType

Returns:

RDF datatype as prefixed name: xsd:string etc.

value

public String value(ResultSet resultSet,
           int column)
             throws SQLException

Description copied from class: DataType

Retrieves a string value in preferred format (canonical form of the closest XSD type) from a SQL ResultSet.

Overrides:

value in class DataType

Parameters:

resultSet - Result of a SELECT query

column - The column index to retrieve; leftmost columns is 1

Returns:

String representation, or null if SQL result was null or is not representable in the XSD type

Throws:

SQLException

toSQLLiteral

public String toSQLLiteral(String value)

Description copied from class: DataType

Creates a SQL literal for the given value, suitable for comparison to a column of this indicated type. If the value is not suitable for the column type (e.g., not a number for a SQLExactNumeric), NULL is returned.

Overrides:

toSQLLiteral in class DataType

Parameters:

value - A value

Returns:

A quoted and escaped SQL literal, suitable for comparison to a column