Package org.geotools.geopkg

Class GeoPkgFilterToSQL

Object

FilterToSQL

PreparedFilterToSQL

GeoPkgFilterToSQL

All Implemented Interfaces:

ExpressionVisitor, FilterVisitor

public class GeoPkgFilterToSQL
extends PreparedFilterToSQL

Author:

ian

Nested Class Summary

Nested classes/interfaces inherited from class FilterToSQL

FilterToSQL.FieldEncoder

Field Summary

Fields inherited from class PreparedFilterToSQL

descriptors, dimensions, literalTypes, literalValues, SRIDs

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
GeoPkgFilterToSQL(Writer out)
GeoPkgFilterToSQL(GeoPkgDialect dialect)

Method Summary

Modifier and Type	Method	Description
void	encode(Filter filter)	Override done to ensure we don't complain if there is a BBOX filter, even if we claim not to support it
String	escapeName(String name)	cf. visit(Literal expression,...)
Object	visit(Literal expression, Object context)	Export the contents of a Literal Expresion
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.

Methods inherited from class PreparedFilterToSQL

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

Methods inherited from class FilterToSQL

cast, createFilterCapabilities, encode, encodeBinaryComparisonOperator, encodeToString, encodeToString, escapeLiteral, 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, visitBinaryComparisonOperator, visitBinarySpatialOperator, visitBinarySpatialOperator, visitBinaryTemporalOperator, visitBinaryTemporalOperator, visitBinaryTemporalOperator, visitInFunction, visitLiteralGeometry, visitLiteralTimePeriod, visitNullFilter, writeBinaryExpression, writeBinaryExpressionMember, writeLiteral

Methods inherited from class Object

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

Constructor Detail

GeoPkgFilterToSQL

public GeoPkgFilterToSQL(GeoPkgDialect dialect)

Parameters:

dialect -

GeoPkgFilterToSQL

public GeoPkgFilterToSQL(Writer out)

Parameters:

out -

Method Detail

escapeName

public String escapeName(String name)

cf. visit(Literal expression,...) When doing temporal queries (like "time BETWEEN t1 AND t2")

The encoding of the column name ("time") and the literals must be the same!

There is different handling for Date (DATE) and Timestamp (DATETIME).

For Timestamp (DATETIME), we use the datetime(XYZ, 'utc'):

datetime("Time",'utc') BETWEEN datetime(?,'utc') AND datetime(?,'utc')

For Date (DATE), we do no conversion in the sql lite:

datetime("Date") BETWEEN datetime(?) AND datetime(?)

For non-time columns, this just relegates to the superclass

For GeoPKG, the time column is actually stored as a STRING.

Overrides:

escapeName in class FilterToSQL

encode

public void encode(Filter filter)
            throws FilterToSQLException

Override done to ensure we don't complain if there is a BBOX filter, even if we claim not to support it

Overrides:

encode in class FilterToSQL

Parameters:

filter - the Filter to be encoded.

Throws:

FilterToSQLException - If filter type not supported, or if there were io problems.

visit

public Object visit(Literal expression,
                    Object context)
             throws RuntimeException

Description copied from class: FilterToSQL

Export the contents of a Literal Expresion

Specified by:

visit in interface ExpressionVisitor

Overrides:

visit in class PreparedFilterToSQL

Parameters:

expression - the Literal to export

Throws:

RuntimeException - for io exception with writer

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