Package org.geotools.data.informix

Class InformixFilterToSQL

Object

FilterToSQL

InformixFilterToSQL

All Implemented Interfaces:

ExpressionVisitor, FilterVisitor

public class InformixFilterToSQL
extends FilterToSQL

Encodes a filter into a SQL WHERE statement using Informix-appropriate syntax.

Author:

George Dewar, Land Information New Zealand, Ines Falcao, Land Information New Zealand

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
InformixFilterToSQL()

Method Summary

Modifier and Type	Method	Description
protected FilterCapabilities	createFilterCapabilities()	Sets the capabilities of this filter.
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 Object	visitBinarySpatialOperatorEnhanced(BinarySpatialOperator filter, Expression e1, Expression e2, boolean swapped, Object extraData)
protected void	visitLiteralGeometry(Literal expression)	Subclasses must implement this method in order to encode geometry filters according to the specific database implementation
protected void	writeLiteral(Object literal)	Writes out a non null, non geometry literal.

Methods inherited from class FilterToSQL

cast, encode, encode, encodeBinaryComparisonOperator, encodeToString, encodeToString, escapeLiteral, escapeName, evaluateLiteral, getCapabilities, getDatabaseSchema, getDistanceInNativeUnits, getExpressionType, getFeatureType, getFunctionName, getFunctionReturnType, getParameter, getPrimaryKey, getSqlNameEscape, isBinaryExpression, isEscapeBackslash, isInEncodingEnabled, 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, visit, visitBinaryComparisonOperator, visitBinarySpatialOperator, visitBinaryTemporalOperator, visitBinaryTemporalOperator, visitBinaryTemporalOperator, visitInFunction, visitLiteralTimePeriod, visitNullFilter, writeBinaryExpression, writeBinaryExpressionMember

Methods inherited from class Object

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

Constructor Detail

InformixFilterToSQL

public InformixFilterToSQL()

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

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

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

visitBinarySpatialOperatorEnhanced

protected Object visitBinarySpatialOperatorEnhanced(BinarySpatialOperator filter,
                                                    Expression e1,
                                                    Expression e2,
                                                    boolean swapped,
                                                    Object extraData)

writeLiteral

protected void writeLiteral(Object literal)
                     throws IOException

Description copied from class: FilterToSQL

Writes out a non null, non geometry literal. The base class properly handles null, numeric and booleans (true|false), and turns everything else into a string. Subclasses are expected to override this shall they need a different treatment (e.g. for dates)

Overrides:

writeLiteral in class FilterToSQL

Throws:

IOException