OracleDialect (Geotools modules 12-SNAPSHOT API)

Object
- SQLDialect
- - PreparedStatementSQLDialect
  - - OracleDialect

```
public class OracleDialect
extends PreparedStatementSQLDialect
```
Abstract dialect implementation for Oracle. Subclasses differ on the way used to parse and encode the JTS geoemtries into Oracle MDSYS.SDO_GEOMETRY structures.

Author:

Justin Deoliveira, OpenGEO, Andrea Aime, OpenGEO

Field Summary

Fields
Modifier and Type	Field and Description
`static Map<Class,String>`	`CLASSES_TO_GEOM` A map from JTS Geometry type to Oracle geometry type.
`static String`	`GEODETIC` Marks a geometry column as geodetic

Fields inherited from class SQLDialect
BASE_DBMS_CAPABILITIES, dataStore, LOGGER

Constructor Summary

Constructors
Constructor and Description

OracleDialect(JDBCDataStore dataStore)

Constructors
Constructor and Description
`OracleDialect(JDBCDataStore dataStore)`

Method Summary

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.
`CoordinateReferenceSystem`	`createCRS(int srid, Connection cx)` Turns the specified srid into a `CoordinateReferenceSystem`, or returns `null` if not possible.
`FilterToSQL`	`createFilterToSQL()`
`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)` 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)` Decodes a geometry value from the result of a query.
`void`	`encodeColumnName(String prefix, String raw, StringBuffer sql)` Encodes the name of a column in an SQL statement.
`void`	`encodeGeometryEnvelope(String tableName, String geometryColumn, StringBuffer sql)` Encodes the spatial extent function of a geometry column in a SELECT statement.
`void`	`encodeTableAlias(String raw, StringBuffer sql)` Encodes the alias of a table in an sql query.
`void`	`encodeTableName(String raw, StringBuffer sql)` Encodes the name of a table in an SQL statement.
`int`	`getGeometryDimension(String schemaName, String tableName, String columnName, Connection cx)` Returns the dimension of the coordinates in the geometry.
`String`	`getGeometryMetadataTable()` The geometry metadata table in use, if any
`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.
`Class<?>`	`getMapping(ResultSet columnMetaData, Connection cx)` Determines the class mapping for a particular column of a table.
`String`	`getNameEscape()` Returns the string used to escape names.
`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.
`List<ReferencedEnvelope>`	`getOptimizedBounds(String schema, SimpleFeatureType featureType, Connection cx)` Returns the bounds of all geometry columns in the layer using any approach that proves to be faster than the plain bounds aggregation (e.g., better than the "plain select extent(geom) from table" on PostGIS), or null if none exists or the fast method has not been enabled (e.g., if the fast method is just an estimate of the bounds you probably want the user to enable it manually)
`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.
`boolean`	`includeTable(String schemaName, String tableName, Connection cx)` Determines if the specified table should be included in those published by the datastore.
`boolean`	`isEstimatedExtentsEnabled()`
`protected boolean`	`isGeodeticSrid(Integer srid, Connection cx)` Checks if the specified srid is geodetic or not
`boolean`	`isLimitOffsetSupported()` Returns true if this dialect can encode both Query.getStartIndex() and Query.getMaxFeatures() into native SQL.
`boolean`	`isLooseBBOXEnabled()`
`void`	`postCreateAttribute(AttributeDescriptor att, String tableName, String schemaName, Connection cx)` Callback which executes after an attribute descriptor has been built from a table column.
`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`	`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`	`setEstimatedExtentsEnabled(boolean estimatedExtenstEnabled)`
`void`	`setGeometryMetadataTable(String geometryMetadataTable)` Sets the geometry metadata table
`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
onDelete, onInsert, onSelect, onUpdate, prepareFunctionArgument, prepareGeometryValue, setValue

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

- Field Detail
  - GEODETIC
```
public static final String GEODETIC
```
    Marks a geometry column as geodetic
    
    See Also:
    Constant Field Values
  - CLASSES_TO_GEOM
```
public static final Map<Class,String> CLASSES_TO_GEOM
```
    A map from JTS Geometry type to Oracle geometry type. See Oracle Spatial documentation, Table 2-1, Valid SDO_GTYPE values.
- Constructor Detail
  - OracleDialect
```
public OracleDialect(JDBCDataStore dataStore)
```
- Method Detail
  - isLooseBBOXEnabled
```
public boolean isLooseBBOXEnabled()
```
  - setLooseBBOXEnabled
```
public void setLooseBBOXEnabled(boolean looseBBOXEnabled)
```
  - isEstimatedExtentsEnabled
```
public boolean isEstimatedExtentsEnabled()
```
  - setEstimatedExtentsEnabled
```
public void setEstimatedExtentsEnabled(boolean estimatedExtenstEnabled)
```
  - 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
    
    Returns:
    The class mapped to the to column, or null.
    
    Throws:
    
    SQLException
  - 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
  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 getNameEscape public String getNameEscape() Description copied from class: SQLDialect Returns the string used to escape names. This value is used to escape any name in a query. This includes columns, tables, schemas, indexes, etc... If no escape is necessary this method should return the empty string, and never return null. This default implementation returns a single double quote ("), subclasses must override to provide a different espcape. Overrides: getNameEscape in class SQLDialect encodeColumnName public void encodeColumnName(String prefix, String raw, StringBuffer sql) Description copied from class: SQLDialect Encodes the name of a column in an SQL statement. This method wraps raw in the character provided by SQLDialect.getNameEscape(). Subclasses usually don't override this method and instead override SQLDialect.getNameEscape(). The prefix parameter may be null so subclasses that do override must handle that case. Overrides: encodeColumnName in class SQLDialect encodeTableName public void encodeTableName(String raw, StringBuffer sql) Description copied from class: SQLDialect Encodes the name of a table in an SQL statement. This method wraps raw in the character provided by SQLDialect.getNameEscape(). Subclasses usually dont override this method and instead override SQLDialect.getNameEscape(). Overrides: encodeTableName in class SQLDialect 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 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. Throws: SQLException IOException decodeGeometryValue public Geometry decodeGeometryValue(GeometryDescriptor descriptor, ResultSet rs, String column, GeometryFactory factory, Connection cx) 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 decodeGeometryValue public Geometry decodeGeometryValue(GeometryDescriptor descriptor, ResultSet rs, int column, GeometryFactory factory, Connection cx) 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)}. 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 createFilterToSQL public FilterToSQL createFilterToSQL() createPreparedFilterToSQL public PreparedFilterToSQL createPreparedFilterToSQL() Overrides: createPreparedFilterToSQL in class PreparedStatementSQLDialect 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 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 createCRS public CoordinateReferenceSystem createCRS(int srid, Connection cx) throws SQLException Description copied from class: SQLDialect Turns the specified srid into a CoordinateReferenceSystem, or returns null if not possible. The implementation might just use CRS.decode("EPSG:" + srid), but most spatial databases will have their own SRS database that can be queried as well. As a rule of thumb you should override this method if your spatial database uses codes that are not part of the EPSG standard database, of if for some reason you deem it preferable to use your database definition instead of an official EPSG one. Most overrides will try out to decode the official EPSG code first, and fall back on the custom database definition otherwise Overrides: createCRS in class SQLDialect Returns: Throws: SQLException 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 SQLDialect.encodeColumnName(String, StringBuffer) function. Specified by: encodeGeometryEnvelope in class SQLDialect getOptimizedBounds public List<ReferencedEnvelope> getOptimizedBounds(String schema, SimpleFeatureType featureType, Connection cx) throws SQLException, IOException Description copied from class: SQLDialect Returns the bounds of all geometry columns in the layer using any approach that proves to be faster than the plain bounds aggregation (e.g., better than the "plain select extent(geom) from table" on PostGIS), or null if none exists or the fast method has not been enabled (e.g., if the fast method is just an estimate of the bounds you probably want the user to enable it manually) Overrides: getOptimizedBounds in class SQLDialect Parameters: schema - The database schema, if any, or null featureType - The feature type containing the geometry columns whose bounds need to computed. Mind, it may be retyped and thus contain less geometry columns than the table Returns: a list of referenced envelopes (some of which may be null or empty) Throws: SQLException IOException 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 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 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 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 isGeodeticSrid protected boolean isGeodeticSrid(Integer srid, Connection cx) Checks if the specified srid is geodetic or not Throws: SQLException 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 encodeTableAlias public void encodeTableAlias(String raw, StringBuffer sql) Description copied from class: SQLDialect Encodes the alias of a table in an sql query. This default implementation uses the syntax: as "alias". Subclasses should override to provide a different syntax. Overrides: encodeTableAlias 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 postCreateAttribute public void postCreateAttribute(AttributeDescriptor att, String tableName, String schemaName, Connection cx) throws SQLException Description copied from class: SQLDialect Callback which executes after an attribute descriptor has been built from a table column. The result set columnMetadata should not be modified in any way (including scrolling) , it should only be read from. This base implementation does nothing, subclasses should override as need be. Overrides: postCreateAttribute in class SQLDialect Parameters: att - The built attribute descriptor. tableName - The name of the table containing the column schemaName - The name of the database scheam containing the table containing the column cx - The database connection. Throws: SQLException getGeometryMetadataTable public String getGeometryMetadataTable() The geometry metadata table in use, if any Returns: setGeometryMetadataTable public void setGeometryMetadataTable(String geometryMetadataTable) Sets the geometry metadata table Parameters: geometryMetadataTable -

Class OracleDialect

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

Field Detail

GEODETIC

CLASSES_TO_GEOM

Constructor Detail

OracleDialect

Method Detail

isLooseBBOXEnabled

setLooseBBOXEnabled

isEstimatedExtentsEnabled

setEstimatedExtentsEnabled

getMapping

includeTable

registerSqlTypeNameToClassMappings

getNameEscape

encodeColumnName

encodeTableName

getGeometryTypeName

decodeGeometryEnvelope

decodeGeometryValue

decodeGeometryValue

setGeometryValue

createFilterToSQL

createPreparedFilterToSQL

getGeometrySRID

getGeometryDimension

createCRS

encodeGeometryEnvelope

getOptimizedBounds

postCreateTable

getSequenceForColumn

getNextSequenceValue

postDropTable

isGeodeticSrid

isLimitOffsetSupported

applyLimitOffset

encodeTableAlias

registerSqlTypeToSqlTypeNameOverrides

postCreateAttribute

getGeometryMetadataTable

setGeometryMetadataTable