org.geotools.data.hana

Class HanaFilterToSQL

Object

FilterToSQL

PreparedFilterToSQL

HanaFilterToSQL

All Implemented Interfaces:

ExpressionVisitor, FilterVisitor

public class HanaFilterToSQL
extends PreparedFilterToSQL

A filter-to-SQL converter for SAP HANA.

Author:

Stefan Uhrig, SAP SE

Nested Class Summary

Nested classes/interfaces inherited from class FilterToSQL

FilterToSQL.FieldEncoder

Field Summary

Fields inherited from class PreparedFilterToSQL

descriptors, dialect, dimensions, literalTypes, literalValues, SRIDs

Fields inherited from class FilterToSQL

capabilities, currentDimension, currentGeometry, currentSRID, databaseSchema, encodingFunction, featureType, fieldEncoder, filterFactory, inEncodingEnabled, inline, IO_ERROR, LOGGER, out, primaryKey

Constructor Summary

Constructors

Constructor and Description
HanaFilterToSQL(PreparedStatementSQLDialect dialect, boolean functionEncodingEnabled, HanaVersion hanaVersion)

Method Summary

Modifier and Type	Method and Description
protected FilterCapabilities	createFilterCapabilities() Sets the capabilities of this filter.
Object	visit(Function function, Object extraData) Writes sql for a function expression.
protected Object	visitBinarySpatialOperator(BinarySpatialOperator filter, Expression e1, Expression e2, Object extraData) Handles the more general case of two generic expressions.
protected Object	visitBinarySpatialOperator(BinarySpatialOperator filter, PropertyName property, Literal geometry, boolean swapped, Object extraData) Handles the common case of a PropertyName,Literal geometry binary spatial operator.
protected void	visitLiteralGeometry(Literal expression) Subclasses must implement this method in order to encode geometry filters according to the specific database implementation

Methods inherited from class PreparedFilterToSQL

convertEnvelopeToPolygon, getDescriptors, getDimensions, getLiteralTypes, getLiteralValues, getSRIDs, isPrepareEnabled, setPrepareEnabled, visit, visit

Methods inherited from class FilterToSQL

cast, encode, encode, encodeBinaryComparisonOperator, encodeToString, encodeToString, escapeName, evaluateLiteral, getCapabilities, getDatabaseSchema, getDistanceInMeters, getDistanceInNativeUnits, getExpressionType, getFeatureType, getFunctionName, getFunctionReturnType, getParameter, getPrimaryKey, getReferenceGeometryCentroid, isBinaryExpression, isInEncodingEnabled, setCapabilities, setDatabaseSchema, setFeatureType, setFieldEncoder, setInEncodingEnabled, setInline, setPrimaryKey, setSqlNameEscape, setWriter, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visitBinaryComparisonOperator, visitBinarySpatialOperator, visitBinaryTemporalOperator, visitBinaryTemporalOperator, visitBinaryTemporalOperator, visitInFunction, visitLiteralTimePeriod, visitNullFilter, writeBinaryExpression, writeBinaryExpressionMember, writeLiteral

Methods inherited from class Object

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

Constructor Detail

HanaFilterToSQL

public HanaFilterToSQL(PreparedStatementSQLDialect dialect,
                       boolean functionEncodingEnabled,
                       HanaVersion hanaVersion)

Method Detail

createFilterCapabilities

protected FilterCapabilities createFilterCapabilities()

Description copied from class: FilterToSQL

Sets the capabilities of this filter.

Overrides:

createFilterCapabilities in class FilterToSQL

Returns:

FilterCapabilities for this Filter

visitBinarySpatialOperator

protected Object visitBinarySpatialOperator(BinarySpatialOperator filter,
                                            PropertyName property,
                                            Literal geometry,
                                            boolean swapped,
                                            Object extraData)

Description copied from class: FilterToSQL

Handles the common case of a PropertyName,Literal geometry binary spatial operator.

Overrides:

visitBinarySpatialOperator in class FilterToSQL

visitBinarySpatialOperator

protected Object visitBinarySpatialOperator(BinarySpatialOperator filter,
                                            Expression e1,
                                            Expression e2,
                                            Object extraData)

Description copied from class: FilterToSQL

Handles the more general case of two generic expressions.

The most common case is two PropertyName expressions, which happens during a spatial join.

Overrides:

visitBinarySpatialOperator in class FilterToSQL

visitLiteralGeometry

protected void visitLiteralGeometry(Literal expression)
                             throws IOException

Description copied from class: FilterToSQL

Subclasses must implement this method in order to encode geometry filters according to the specific database implementation

Overrides:

visitLiteralGeometry in class FilterToSQL

Throws:

IOException

visit

public Object visit(Function function,
                    Object extraData)
             throws RuntimeException

Description copied from class: FilterToSQL

Writes sql for a function expression. By default it will write the call by using the same arguments provided to the GeoTools function, subclasses should override on a case by case basis if this behavior is not the desired one.

Specified by:

visit in interface ExpressionVisitor

Overrides:

visit in class FilterToSQL

Parameters:

function - a function expression

Throws:

RuntimeException - If an IO error occurs.

See Also:

FilterToSQL.getFunctionName(Function)