Package org.h2gis.geotools

Class H2GISFilterToSQL

Object

FilterToSQL

H2GISFilterToSQL

All Implemented Interfaces:

ExpressionVisitor, FilterVisitor

public class H2GISFilterToSQL
extends FilterToSQL

jdbc-h2gis is an extension to connect H2GIS a spatial library that brings spatial support to the H2 Java database.

H2GIS filter wrapper for H2GIS database.

Author:

Erwan Bocher

Nested Class Summary

Nested classes/interfaces inherited from class FilterToSQL

FilterToSQL.FieldEncoder

Field Summary

Fields inherited from class FilterToSQL

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

Constructor Summary

Constructors

Constructor	Description
H2GISFilterToSQL()

Method Summary

Modifier and Type	Method	Description
protected String	cast(String encodedProperty, Class target)	Gives the opportunity to subclasses to force the property to the desired type.
protected FilterCapabilities	createFilterCapabilities()	Sets the capabilities of this filter.
protected String	getFunctionName(Function function)	Maps the function to the native database function name
void	setFunctionEncodingEnabled(boolean functionEncodingEnabled)
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 FilterToSQL

encode, encode, encodeBinaryComparisonOperator, encodeToString, encodeToString, escapeLiteral, escapeName, evaluateLiteral, getCapabilities, getDatabaseSchema, getDistanceInNativeUnits, getExpressionType, getFeatureType, getFunctionReturnType, getParameter, getPrimaryKey, getSqlNameEscape, isBinaryExpression, isEscapeBackslash, isInEncodingEnabled, processLikeLeftOperand, setCapabilities, setDatabaseSchema, setEscapeBackslash, 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, 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 Details

H2GISFilterToSQL

public H2GISFilterToSQL()

Method Details

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

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

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)

getFunctionName

protected String getFunctionName(Function function)

Description copied from class: FilterToSQL

Maps the function to the native database function name

Overrides:

getFunctionName in class FilterToSQL

cast

protected String cast(String encodedProperty,
 Class target)

Description copied from class: FilterToSQL

Gives the opportunity to subclasses to force the property to the desired type. By default it simply writes out the property as-is (the property must be already escaped).

Overrides:

cast in class FilterToSQL

setFunctionEncodingEnabled

public void setFunctionEncodingEnabled(boolean functionEncodingEnabled)

Parameters:

functionEncodingEnabled -