Package org.hibernate.spatial.dialect.postgis

Class PostgisSupport

java.lang.Object

org.hibernate.spatial.dialect.postgis.PostgisSupport

All Implemented Interfaces:

Serializable, SpatialDialect

public class PostgisSupport
extends Object
implements SpatialDialect, Serializable

Created by Karel Maesen, Geovise BVBA on 29/10/16.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
PostgisSupport()

Method Summary

Modifier and Type	Method	Description
org.hibernate.spatial.dialect.postgis.PostgisFunctions	functionsToRegister()
String	getDWithinSQL(String columnName)	Returns The SQL fragment when parsing a DWithinExpression.
String	getHavingSridSQL(String columnName)	Returns the SQL fragment when parsing a HavingSridExpression.
String	getIsEmptySQL(String columnName, boolean isEmpty)	Returns the SQL fragment when parsing a IsEmptyExpression or IsNotEmpty expression.
String	getSpatialAggregateSQL(String columnName, int aggregation)	Returns the SQL fragment for the specfied Spatial aggregate expression.
String	getSpatialFilterExpression(String columnName)	Returns the SQL fragment for the SQL WHERE-expression when parsing org.hibernate.spatial.criterion.SpatialFilterExpressions into prepared statements.
String	getSpatialRelateSQL(String columnName, int spatialRelation)	Returns the SQL fragment for the SQL WHERE-clause when parsing org.hibernatespatial.criterion.SpatialRelateExpressions into prepared statements.
boolean	supports(SpatialFunction function)	Does this dialect supports the specified SpatialFunction.
boolean	supportsFiltering()	Returns true if this SpatialDialect supports a specific filtering function.

Methods inherited from class java.lang.Object

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

Constructor Detail

PostgisSupport

public PostgisSupport()

Method Detail

functionsToRegister

public org.hibernate.spatial.dialect.postgis.PostgisFunctions functionsToRegister()

getSpatialRelateSQL

public String getSpatialRelateSQL(String columnName,
                                  int spatialRelation)

Returns the SQL fragment for the SQL WHERE-clause when parsing org.hibernatespatial.criterion.SpatialRelateExpressions into prepared statements.

Specified by:

getSpatialRelateSQL in interface SpatialDialect

Parameters:

columnName - The name of the geometry-typed column to which the relation is applied

spatialRelation - The type of spatial relation (as defined in SpatialRelation).

Returns:

SQL fragment SpatialRelateExpression

getSpatialFilterExpression

public String getSpatialFilterExpression(String columnName)

Returns the SQL fragment for the SQL WHERE-expression when parsing org.hibernate.spatial.criterion.SpatialFilterExpressions into prepared statements.

Specified by:

getSpatialFilterExpression in interface SpatialDialect

Parameters:

columnName - The name of the geometry-typed column to which the filter is be applied

Returns:

Rhe SQL fragment for the SpatialFilterExpression

getSpatialAggregateSQL

public String getSpatialAggregateSQL(String columnName,
                                     int aggregation)

Returns the SQL fragment for the specfied Spatial aggregate expression.

Specified by:

getSpatialAggregateSQL in interface SpatialDialect

Parameters:

columnName - The name of the Geometry property

aggregation - The type of SpatialAggregate

Returns:

The SQL fragment for the projection

getDWithinSQL

public String getDWithinSQL(String columnName)

Returns The SQL fragment when parsing a DWithinExpression.

Specified by:

getDWithinSQL in interface SpatialDialect

Parameters:

columnName - The geometry column to test against

Returns:

The SQL fragment when parsing a DWithinExpression.

getHavingSridSQL

public String getHavingSridSQL(String columnName)

Returns the SQL fragment when parsing a HavingSridExpression.

Specified by:

getHavingSridSQL in interface SpatialDialect

Parameters:

columnName - The geometry column to test against

Returns:

The SQL fragment for a HavingSridExpression.

getIsEmptySQL

public String getIsEmptySQL(String columnName,
                            boolean isEmpty)

Returns the SQL fragment when parsing a IsEmptyExpression or IsNotEmpty expression.

Specified by:

getIsEmptySQL in interface SpatialDialect

Parameters:

columnName - The geometry column

isEmpty - Whether the geometry is tested for empty or non-empty

Returns:

The SQL fragment for the isempty function

supportsFiltering

public boolean supportsFiltering()

Returns true if this SpatialDialect supports a specific filtering function.

This is intended to signal DB-support for fast window queries, or MBR-overlap queries.

Specified by:

supportsFiltering in interface SpatialDialect

Returns:

True if filtering is supported

supports

public boolean supports(SpatialFunction function)

Does this dialect supports the specified SpatialFunction.

Specified by:

supports in interface SpatialDialect

Parameters:

function - SpatialFunction

Returns:

True if this SpatialDialect supports the spatial function specified by the function parameter.