PostGISPSDialect (Geotools modules 22-SNAPSHOT API)

Object
- SQLDialect
- - PreparedStatementSQLDialect
  - - PostGISPSDialect

public class PostGISPSDialect
extends PreparedStatementSQLDialect

Field Summary
- Fields inherited from class SQLDialect
  BASE_DBMS_CAPABILITIES, dataStore, LOGGER

Constructor Summary

Constructors
Constructor and Description

PostGISPSDialect(JDBCDataStore store, PostGISDialect delegate)

Constructors
Constructor and Description
`PostGISPSDialect(JDBCDataStore store, PostGISDialect delegate)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`applyLimitOffset(StringBuffer sql, int limit, int offset)` Alters the query provided so that limit and offset are natively dealt with.
`PreparedFilterToSQL`	`createPreparedFilterToSQL()`
`Envelope`	`decodeGeometryEnvelope(ResultSet rs, int column, Connection cx)` Decodes the result of a spatial extent function in a SELECT statement.
`Geometry`	`decodeGeometryValue(GeometryDescriptor descriptor, ResultSet rs, int column, GeometryFactory factory, Connection cx, Hints hints)` Decodes a geometry value from the result of a query specifying the column as an index.
`Geometry`	`decodeGeometryValue(GeometryDescriptor descriptor, ResultSet rs, String column, GeometryFactory factory, Connection cx, Hints hints)` Decodes a geometry value from the result of a query.
`void`	`encodeGeometryColumn(GeometryDescriptor gatt, String prefix, int srid, Hints hints, StringBuffer sql)` Encodes the name of a geometry column in a SELECT statement.
`void`	`encodeGeometryEnvelope(String tableName, String geometryColumn, StringBuffer sql)` Encodes the spatial extent function of a geometry column in a SELECT statement.
`void`	`encodeGeometryValue(Geometry value, int dimension, int srid, StringBuffer sql)`
`String`	`encodeNextSequenceValue(String schemaName, String sequenceName)` Encodes how to get the next sequence value from the DB.
`void`	`encodePrimaryKey(String column, StringBuffer sql)` Encodes the primary key definition in a CREATE TABLE statement.
`protected String`	`getArrayComponentTypeName(AttributeDescriptor att)` Given the full information about the attribute being transformed, figure out the native SQL Type Name to use when creating a SQL Array object· The default implementation just scans `JDBCDataStore.getSqlTypeNameToClassMappings()` backwards, and will fail in case there are ambiguities.
`int`	`getGeometryDimension(String schemaName, String tableName, String columnName, Connection cx)` Returns the dimension of the coordinates in the geometry.
`Integer`	`getGeometrySRID(String schemaName, String tableName, String columnName, Connection cx)` Returns the spatial reference system identifier (srid) for a particular geometry column.
`String`	`getGeometryTypeName(Integer type)` Returns the name of a geometric type based on its integer constant.
`Object`	`getLastAutoGeneratedValue(String schemaName, String tableName, String columnName, Connection cx)` Obtains the last value of an auto generated column.
`Class<?>`	`getMapping(ResultSet columnMetaData, Connection cx)` Determines the class mapping for a particular column of a table.
`Object`	`getNextAutoGeneratedValue(String schemaName, String tableName, String columnName, Connection cx)` Obtains the next value of an auto generated column.
`Object`	`getNextSequenceValue(String schemaName, String sequenceName, Connection cx)` Obtains the next value of a sequence, incrementing the sequence to the next state in the process.
`String`	`getSequenceForColumn(String schemaName, String tableName, String columnName, Connection cx)` Determines the name of the sequence (if any) which is used to increment generate values for a table column.
`void`	`handleUserDefinedType(ResultSet columnMetaData, ColumnMetadata metadata, Connection cx)` Handles the mapping for a user defined type.
`boolean`	`includeTable(String schemaName, String tableName, Connection cx)` Determines if the specified table should be included in those published by the datastore.
`boolean`	`isAggregatedSortSupported(String function)` Returns true if this dialect supports sorting together with the given aggregation function.
`boolean`	`isEncodeBBOXFilterAsEnvelope()`
`boolean`	`isFunctionEncodingEnabled()`
`boolean`	`isLimitOffsetSupported()` Returns true if this dialect can encode both Query.getStartIndex() and Query.getMaxFeatures() into native SQL.
`boolean`	`isLooseBBOXEnabled()`
`boolean`	`lookupGeneratedValuesPostInsert()` Controls whether keys are looked up post or pre insert.
`void`	`postCreateTable(String schemaName, SimpleFeatureType featureType, Connection cx)` Callback to execute any additional sql statements post a create table statement.
`void`	`postDropTable(String schemaName, SimpleFeatureType featureType, Connection cx)` Callback which executes after a table has been dropped.
`void`	`preDropTable(String schemaName, SimpleFeatureType featureType, Connection cx)` Callback which executes before a table is about to be dropped.
`void`	`prepareGeometryValue(Class<? extends Geometry> gClass, int dimension, int srid, Class binding, StringBuffer sql)` Prepares the geometry value for a prepared statement.
`void`	`registerClassToSqlMappings(Map<Class<?>,Integer> mappings)` Registers the java type to sql type mappings that the datastore uses when reading and writing objects to and from the database. * Subclasses should extend (not override) this method to provide additional mappings, or to override mappings provided by this implementation.
`void`	`registerSqlTypeNameToClassMappings(Map<String,Class<?>> mappings)` Registers the sql type name to java type mappings that the dialect uses when reading and writing objects to and from the database.
`void`	`registerSqlTypeToSqlTypeNameOverrides(Map<Integer,String> overrides)` Registers any overrides that should occur when mapping an integer sql type value to an underlying sql type name.
`void`	`setEncodeBBOXFilterAsEnvelope(boolean encodeBBOXFilterAsEnvelope)`
`void`	`setFunctionEncodingEnabled(boolean functionEncodingEnabled)`
`void`	`setGeometryValue(Geometry g, int dimension, int srid, Class binding, PreparedStatement ps, int column)` Sets the geometry value into the prepared statement.
`void`	`setLooseBBOXEnabled(boolean looseBBOXEnabled)`

Methods inherited from class PreparedStatementSQLDialect
convert, convertArrayElement, convertToArray, onDelete, onInsert, onSelect, onUpdate, prepareFunctionArgument, prepareGeometryValue, setArrayValue, setValue

Methods inherited from class Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - PostGISPSDialect
```
public PostGISPSDialect(JDBCDataStore store,
                        PostGISDialect delegate)
```
- Method Detail
  - isAggregatedSortSupported
```
public boolean isAggregatedSortSupported(String function)
```
    Description copied from class: SQLDialect
    
    Returns true if this dialect supports sorting together with the given aggregation function.
    
    Overrides:
    
    isAggregatedSortSupported in class SQLDialect
    
    Returns:
  - includeTable
```
public boolean includeTable(String schemaName,
                            String tableName,
                            Connection cx)
                     throws SQLException
```
    Description copied from class: SQLDialect
    
    Determines if the specified table should be included in those published by the datastore.
    This method returns true if the table should be published as a feature type, otherwise it returns false. Subclasses should override this method, this default implementation returns true.
    A database connection is provided to the dialect but it should not be closed. However any statements objects or result sets that are instantiated from it must be closed.
    Overrides: includeTable in class SQLDialect Parameters: schemaName - The schema of the table, might be null.. tableName - The name of the table. cx - Database connection. Throws: SQLException
  decodeGeometryEnvelope public Envelope decodeGeometryEnvelope(ResultSet rs, int column, Connection cx) throws SQLException, IOException Description copied from class: SQLDialect Decodes the result of a spatial extent function in a SELECT statement. This method is given direct access to a result set. The column parameter is the index into the result set which contains the spatial extent value. The query for this value is build with the SQLDialect.encodeGeometryEnvelope(String, String, StringBuffer) method. This method must not read any other objects from the result set other then the one referenced by column. Specified by: decodeGeometryEnvelope in class SQLDialect Parameters: rs - A result set column - Index into the result set which points at the spatial extent value. cx - The database connection. Throws: SQLException IOException decodeGeometryValue public Geometry decodeGeometryValue(GeometryDescriptor descriptor, ResultSet rs, int column, GeometryFactory factory, Connection cx, Hints hints) throws IOException, SQLException Description copied from class: SQLDialect Decodes a geometry value from the result of a query specifying the column as an index. See #decodeGeometryValue(GeometryDescriptor, ResultSet, String, GeometryFactory) for a more in depth description. Overrides: decodeGeometryValue in class SQLDialect Throws: IOException SQLException See Also: #decodeGeometryValue(GeometryDescriptor, ResultSet, String, GeometryFactory)}. decodeGeometryValue public Geometry decodeGeometryValue(GeometryDescriptor descriptor, ResultSet rs, String column, GeometryFactory factory, Connection cx, Hints hints) throws IOException, SQLException Description copied from class: SQLDialect Decodes a geometry value from the result of a query. This method is given direct access to a result set. The column parameter is the index into the result set which contains the geometric value. An implementation should deserialize the value provided by the result set into Geometry object. For example, consider an implementation which deserializes from well known text: String wkt = rs.getString( column ); if ( wkt == null ) { return null; } return new WKTReader(factory).read( wkt ); Note that implementations must handle null values. The factory parameter should be used to instantiate any geometry objects. Specified by: decodeGeometryValue in class SQLDialect Throws: IOException SQLException encodeGeometryColumn public void encodeGeometryColumn(GeometryDescriptor gatt, String prefix, int srid, Hints hints, StringBuffer sql) Description copied from class: SQLDialect Encodes the name of a geometry column in a SELECT statement. This method should wrap the column name in any functions that are used to retrieve its value. For instance, often it is necessary to use the function asText, or asWKB when fetching a geometry. This method must also be sure to properly encode the name of the column with the SQLDialect.encodeColumnName(String, String, StringBuffer) function. Example: sql.append( "asText(" ); column( gatt.getLocalName(), sql ); sql.append( ")" ); Overrides: encodeGeometryColumn in class SQLDialect encodeGeometryEnvelope public void encodeGeometryEnvelope(String tableName, String geometryColumn, StringBuffer sql) Description copied from class: SQLDialect Encodes the spatial extent function of a geometry column in a SELECT statement. This method must also be sure to properly encode the name of the column with the #encodeColumnName(String, StringBuffer) function. Specified by: encodeGeometryEnvelope in class SQLDialect encodePrimaryKey public void encodePrimaryKey(String column, StringBuffer sql) Description copied from class: SQLDialect Encodes the primary key definition in a CREATE TABLE statement. Subclasses should override this method if need be, the default implementation does the following: encodeColumnName( column, sql ); sql.append( " int PRIMARY KEY" ); Overrides: encodePrimaryKey in class SQLDialect getGeometrySRID public Integer getGeometrySRID(String schemaName, String tableName, String columnName, Connection cx) throws SQLException Description copied from class: SQLDialect Returns the spatial reference system identifier (srid) for a particular geometry column. This method is given a direct connection to the database. The connection must not be closed. However any statements or result sets instantiated from the connection must be closed. In the event that the srid cannot be determined, this method should return null . Overrides: getGeometrySRID in class SQLDialect Parameters: schemaName - The database schema, could be null. tableName - The table, never null. columnName - The column name, never null cx - The database connection. Throws: SQLException getGeometryTypeName public String getGeometryTypeName(Integer type) Description copied from class: SQLDialect Returns the name of a geometric type based on its integer constant. The constant, type, is registered in SQLDialect.registerSqlTypeNameToClassMappings(Map). This default implementation returns null, subclasses should override. Overrides: getGeometryTypeName in class SQLDialect getMapping public Class<?> getMapping(ResultSet columnMetaData, Connection cx) throws SQLException Description copied from class: SQLDialect Determines the class mapping for a particular column of a table. Implementing this method is optional. It is used to allow database to perform custom type mappings based on various column metadata. It is called before the mappings registered in SQLDialect.registerSqlTypeToClassMappings(Map) and #registerSqlTypeNameToClassMappings(Map) are used to determine the mapping. Subclasses should implement as needed, this default implementation returns null. The columnMetaData argument is provided from {@link DatabaseMetaData#getColumns(String, String, String, String)}. Overrides: getMapping in class SQLDialect Parameters: columnMetaData - The column metadata cx - The connection used to retrieve the metadata Returns: The class mapped to the to column, or null. Throws: SQLException lookupGeneratedValuesPostInsert public boolean lookupGeneratedValuesPostInsert() Description copied from class: SQLDialect Controls whether keys are looked up post or pre insert. When a row is inserted into a table, and a key is automatically generated it can be looked up before the insert occurs, or after the insert has been made. Returning false will cause the lookup to occur before the insert via SQLDialect.getNextAutoGeneratedValue(String, String, String, Connection). Returning true will cause the lookup to occur after the insert via SQLDialect.getLastAutoGeneratedValue(String, String, String, Connection). Subclasses returning false should implement: SQLDialect.getNextAutoGeneratedValue(String, String, String, Connection) Subclasses returning true should implement: SQLDialect.getLastAutoGeneratedValue(String, String, String, Connection) Overrides: lookupGeneratedValuesPostInsert in class SQLDialect getNextAutoGeneratedValue public Object getNextAutoGeneratedValue(String schemaName, String tableName, String columnName, Connection cx) throws SQLException Description copied from class: SQLDialect Obtains the next value of an auto generated column. Implementations should determine the next value of a column for which values are automatically generated by the database. This method is given a direct connection to the database, but this connection should never be closed. However any statements or result sets instantiated from the connection must be closed. Implementations should handle the case where schemaName is null. Overrides: getNextAutoGeneratedValue in class SQLDialect Parameters: schemaName - The schema name, this might be null. tableName - The name of the table. columnName - The column. cx - The database connection. Returns: The next value of the column, or null. Throws: SQLException getLastAutoGeneratedValue public Object getLastAutoGeneratedValue(String schemaName, String tableName, String columnName, Connection cx) throws SQLException Description copied from class: SQLDialect Obtains the last value of an auto generated column. This method is only called when SQLDialect.lookupGeneratedValuesPostInsert() returns true. Implementations should determine the previous value of a column for which was automatically generated by the database. This method is given a direct connection to the database, but this connection should never be closed. However any statements or result sets instantiated from the connection must be closed. Implementations should handle the case where schemaName is null. Overrides: getLastAutoGeneratedValue in class SQLDialect Parameters: schemaName - The schema name, this might be null. tableName - The name of the table. columnName - The column. cx - The database connection. Returns: The previous value of the column, or null. Throws: SQLException getNextSequenceValue public Object getNextSequenceValue(String schemaName, String sequenceName, Connection cx) throws SQLException Description copied from class: SQLDialect Obtains the next value of a sequence, incrementing the sequence to the next state in the process. Implementations should determine the next value of a column for which values are automatically generated by the database. This method is given a direct connection to the database, but this connection should never be closed. However any statements or result sets instantiated from the connection must be closed. Implementations should handle the case where schemaName is null. Overrides: getNextSequenceValue in class SQLDialect Parameters: schemaName - The schema name, this might be null. sequenceName - The name of the sequence. cx - The database connection. Returns: The next value of the sequence, or null. Throws: SQLException encodeNextSequenceValue public String encodeNextSequenceValue(String schemaName, String sequenceName) Description copied from class: SQLDialect Encodes how to get the next sequence value from the DB. Implementations should handle the case where schemaName is null. Overrides: encodeNextSequenceValue in class SQLDialect getSequenceForColumn public String getSequenceForColumn(String schemaName, String tableName, String columnName, Connection cx) throws SQLException Description copied from class: SQLDialect Determines the name of the sequence (if any) which is used to increment generate values for a table column. This method should return null if no such sequence exists. This method is given a direct connection to the database, but this connection should never be closed. However any statements or result sets instantiated from the connection must be closed. Overrides: getSequenceForColumn in class SQLDialect Parameters: schemaName - The schema name, this might be null. tableName - The table name. columnName - The column name. cx - The database connection. Throws: SQLException isLooseBBOXEnabled public boolean isLooseBBOXEnabled() postCreateTable public void postCreateTable(String schemaName, SimpleFeatureType featureType, Connection cx) throws SQLException Description copied from class: SQLDialect Callback to execute any additional sql statements post a create table statement. This method should be implemented by subclasses that need to do some post processing on the database after a table has been created. Examples might include: Creating a sequence for a primary key Registering geometry column metadata Creating a spatial index A common case is creating an auto incrementing sequence for the primary key of a table. It should be noted that all tables created through the datastore use the column "fid" as the primary key. A direct connection to the database is provided (cx). This connection must not be closed, however any statements or result sets instantiated from the connection must be closed. Overrides: postCreateTable in class SQLDialect Parameters: schemaName - The name of the schema, may be null. featureType - The feature type that has just been created on the database. cx - Database connection. Throws: SQLException preDropTable public void preDropTable(String schemaName, SimpleFeatureType featureType, Connection cx) throws SQLException Description copied from class: SQLDialect Callback which executes before a table is about to be dropped. This base implementation does nothing, subclasses should override as need be. Overrides: preDropTable in class SQLDialect Parameters: schemaName - The database schema containing the table. featureType - The featureType/table being dropped. cx - The database connection. Throws: SQLException postDropTable public void postDropTable(String schemaName, SimpleFeatureType featureType, Connection cx) throws SQLException Description copied from class: SQLDialect Callback which executes after a table has been dropped. This base implementation does nothing, subclasses should override as need be. Overrides: postDropTable in class SQLDialect Parameters: schemaName - The database schema containing the table. featureType - The featureType/table being dropped. cx - The database connection. Throws: SQLException registerClassToSqlMappings public void registerClassToSqlMappings(Map<Class<?>,Integer> mappings) Description copied from class: SQLDialect Registers the java type to sql type mappings that the datastore uses when reading and writing objects to and from the database. * Subclasses should extend (not override) this method to provide additional mappings, or to override mappings provided by this implementation. This implementation provides the following mappings: Overrides: registerClassToSqlMappings in class SQLDialect registerSqlTypeNameToClassMappings public void registerSqlTypeNameToClassMappings(Map<String,Class<?>> mappings) Description copied from class: SQLDialect Registers the sql type name to java type mappings that the dialect uses when reading and writing objects to and from the database. Subclasses should extend (not override) this method to provide additional mappings, or to override mappings provided by this implementation. This implementation provides the following mappings: Overrides: registerSqlTypeNameToClassMappings in class SQLDialect registerSqlTypeToSqlTypeNameOverrides public void registerSqlTypeToSqlTypeNameOverrides(Map<Integer,String> overrides) Description copied from class: SQLDialect Registers any overrides that should occur when mapping an integer sql type value to an underlying sql type name. The default implementation of this method does nothing. Subclasses should override in cases where: database type metadata does not provide enough information to properly map to support custom types (those not in Types) Overrides: registerSqlTypeToSqlTypeNameOverrides in class SQLDialect handleUserDefinedType public void handleUserDefinedType(ResultSet columnMetaData, ColumnMetadata metadata, Connection cx) throws SQLException Description copied from class: SQLDialect Handles the mapping for a user defined type. This method is called after SQLDialect.getMapping(ResultSet, Connection) but before the rest of the type mapping heuristics are applied. Implementing this method is optional. It is used to allow for handling user defined types or "DOMAINS". Dialects that implement this method should set the appropriate information on the metadata object to allow the column to be mapped via teh regular type mapping heuristics. Overrides: handleUserDefinedType in class SQLDialect Parameters: columnMetaData - The column metdata. metadata - The column metadata object that collections mapping information. cx - The database connection, not to be closed. Throws: SQLException setLooseBBOXEnabled public void setLooseBBOXEnabled(boolean looseBBOXEnabled) isEncodeBBOXFilterAsEnvelope public boolean isEncodeBBOXFilterAsEnvelope() setEncodeBBOXFilterAsEnvelope public void setEncodeBBOXFilterAsEnvelope(boolean encodeBBOXFilterAsEnvelope) prepareGeometryValue public void prepareGeometryValue(Class<? extends Geometry> gClass, int dimension, int srid, Class binding, StringBuffer sql) Description copied from class: PreparedStatementSQLDialect Prepares the geometry value for a prepared statement. This method should be overridden if the implementation needs to wrap the geometry placeholder in the function. The default implementationg just appends the default placeholder: '?'. Overrides: prepareGeometryValue in class PreparedStatementSQLDialect Parameters: gClass - The geometry class. dimension - The dimensions (2,3,4) of the coordinates, or -1 if unknown srid - The spatial reference system of the geometry, or -1 if unknown binding - The class of the geometry. sql - The prepared sql statement buffer. setGeometryValue public void setGeometryValue(Geometry g, int dimension, int srid, Class binding, PreparedStatement ps, int column) throws SQLException Description copied from class: PreparedStatementSQLDialect Sets the geometry value into the prepared statement. Specified by: setGeometryValue in class PreparedStatementSQLDialect Parameters: g - The geometry srid - the geometry native srid (should be forced into the encoded geometry) binding - the geometry type ps - the prepared statement column - the column index where the geometry is to be set Throws: SQLException createPreparedFilterToSQL public PreparedFilterToSQL createPreparedFilterToSQL() Overrides: createPreparedFilterToSQL in class PreparedStatementSQLDialect isLimitOffsetSupported public boolean isLimitOffsetSupported() Description copied from class: SQLDialect Returns true if this dialect can encode both Query.getStartIndex() and Query.getMaxFeatures() into native SQL. Overrides: isLimitOffsetSupported in class SQLDialect Returns: applyLimitOffset public void applyLimitOffset(StringBuffer sql, int limit, int offset) Description copied from class: SQLDialect Alters the query provided so that limit and offset are natively dealt with. This might mean simply appending some extra directive to the query, or wrapping it into a bigger one. Overrides: applyLimitOffset in class SQLDialect getGeometryDimension public int getGeometryDimension(String schemaName, String tableName, String columnName, Connection cx) throws SQLException Description copied from class: SQLDialect Returns the dimension of the coordinates in the geometry. Defaults to 2, subclasses can override it. This method is given a direct connection to the database. The connection must not be closed. However any statements or result sets instantiated from the connection must be closed. In the event that the dimension cannot be determined, this method should return 2 Overrides: getGeometryDimension in class SQLDialect Parameters: schemaName - The database schema, could be null. tableName - The table, never null. columnName - The column name, never null cx - The database connection. Throws: SQLException isFunctionEncodingEnabled public boolean isFunctionEncodingEnabled() setFunctionEncodingEnabled public void setFunctionEncodingEnabled(boolean functionEncodingEnabled) getArrayComponentTypeName protected String getArrayComponentTypeName(AttributeDescriptor att) throws SQLException Description copied from class: PreparedStatementSQLDialect Given the full information about the attribute being transformed, figure out the native SQL Type Name to use when creating a SQL Array object· The default implementation just scans JDBCDataStore.getSqlTypeNameToClassMappings() backwards, and will fail in case there are ambiguities. Subclasses can implement their own logic and eventually use information contained in the attribute's PropertyDescriptor.getUserData(), stored at attribute creation time. Overrides: getArrayComponentTypeName in class PreparedStatementSQLDialect Returns: Throws: SQLException encodeGeometryValue public void encodeGeometryValue(Geometry value, int dimension, int srid, StringBuffer sql) throws IOException Throws: IOException

Class PostGISPSDialect

Field Summary

Fields inherited from class SQLDialect

Constructor Summary

Method Summary

Methods inherited from class PreparedStatementSQLDialect

Methods inherited from class SQLDialect

Methods inherited from class Object

Constructor Detail

PostGISPSDialect

Method Detail

isAggregatedSortSupported

includeTable

decodeGeometryEnvelope

decodeGeometryValue

decodeGeometryValue

encodeGeometryColumn

encodeGeometryEnvelope

encodePrimaryKey

getGeometrySRID

getGeometryTypeName

getMapping

lookupGeneratedValuesPostInsert

getNextAutoGeneratedValue

getLastAutoGeneratedValue

getNextSequenceValue

encodeNextSequenceValue

getSequenceForColumn

isLooseBBOXEnabled

postCreateTable

preDropTable

postDropTable

registerClassToSqlMappings

registerSqlTypeNameToClassMappings

registerSqlTypeToSqlTypeNameOverrides

handleUserDefinedType

setLooseBBOXEnabled

isEncodeBBOXFilterAsEnvelope

setEncodeBBOXFilterAsEnvelope

prepareGeometryValue

setGeometryValue

createPreparedFilterToSQL

isLimitOffsetSupported

applyLimitOffset

getGeometryDimension

isFunctionEncodingEnabled

setFunctionEncodingEnabled

getArrayComponentTypeName

encodeGeometryValue