Module org.postgresql.pljava.internal

Package org.postgresql.pljava.jdbc

Class SPIResultSetMetaData

java.lang.Object

org.postgresql.pljava.jdbc.AbstractResultSetMetaData

org.postgresql.pljava.jdbc.SPIResultSetMetaData

All Implemented Interfaces:

ResultSetMetaData, Wrapper

public class SPIResultSetMetaData
extends AbstractResultSetMetaData

Implementation of ResultSetMetaData for SPIResultSet

Author:

Filip Hrbek

Field Summary

Fields inherited from interface java.sql.ResultSetMetaData

columnNoNulls, columnNullable, columnNullableUnknown

Constructor Summary

Constructors

Constructor	Description
SPIResultSetMetaData(TupleDesc tupleDesc)	Constructor.

Method Summary

Modifier and Type	Method	Description
protected void	checkColumnIndex(int column)	Checks if the column index is valid.
String	getColumnClassName(int column)	Returns the fully-qualified name of the Java class whose instances are manufactured if the method ResultSet.getObject is called to retrieve a value from the column.
int	getColumnCount()	Returns the number of columns in this ResultSet object.
String	getColumnLabel(int column)	Gets the designated column's suggested title for use in printouts and displays.
protected int	getFieldLength(int column)	Gets column length.
protected Oid	getOid(int column)	Gets column OID
boolean	isAutoIncrement(int column)	Indicates whether the designated column is automatically numbered, thus read-only.

Methods inherited from class org.postgresql.pljava.jdbc.AbstractResultSetMetaData

getCatalogName, getColumnDisplaySize, getColumnName, getColumnType, getColumnTypeName, getPrecision, getScale, getSchemaName, getTableName, isCaseSensitive, isCurrency, isDefinitelyWritable, isNullable, isReadOnly, isSearchable, isSigned, isWrapperFor, isWritable, unwrap

Methods inherited from class java.lang.Object

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

Constructor Detail

SPIResultSetMetaData

public SPIResultSetMetaData(TupleDesc tupleDesc)

Constructor.

Parameters:

tupleDesc - The descriptor for the ResultSet tuples

Method Detail

getColumnCount

public final int getColumnCount()
                         throws SQLException

Returns the number of columns in this ResultSet object.

Specified by:

getColumnCount in interface ResultSetMetaData

Specified by:

getColumnCount in class AbstractResultSetMetaData

Returns:

the number of columns

Throws:

SQLException - if a database access error occurs

isAutoIncrement

public final boolean isAutoIncrement(int column)
                              throws SQLException

Indicates whether the designated column is automatically numbered, thus read-only.

Specified by:

isAutoIncrement in interface ResultSetMetaData

Specified by:

isAutoIncrement in class AbstractResultSetMetaData

Parameters:

column - the first column is 1, the second is 2, ...

Returns:

true if so; false otherwise

Throws:

SQLException - if a database access error occurs

getColumnLabel

public final String getColumnLabel(int column)
                            throws SQLException

Gets the designated column's suggested title for use in printouts and displays.

Specified by:

getColumnLabel in interface ResultSetMetaData

Specified by:

getColumnLabel in class AbstractResultSetMetaData

Parameters:

column - the first column is 1, the second is 2, ...

Returns:

the suggested column title

Throws:

SQLException - if a database access error occurs

getColumnClassName

public final String getColumnClassName(int column)
                                throws SQLException

Returns the fully-qualified name of the Java class whose instances are manufactured if the method ResultSet.getObject is called to retrieve a value from the column. ResultSet.getObject may return a subclass of the class returned by this method.

Specified by:

getColumnClassName in interface ResultSetMetaData

Specified by:

getColumnClassName in class AbstractResultSetMetaData

Parameters:

column - the first column is 1, the second is 2, ...

Returns:

the fully-qualified name of the class in the Java programming language that would be used by the method ResultSet.getObject to retrieve the value in the specified column. This is the class name used for custom mapping.

Throws:

SQLException - if a database access error occurs

Since:

1.2

checkColumnIndex

protected final void checkColumnIndex(int column)
                               throws SQLException

Checks if the column index is valid.

Specified by:

checkColumnIndex in class AbstractResultSetMetaData

Parameters:

column - the first column is 1, the second is 2, ...

Throws:

SQLException - if the column is out of index bounds

getOid

protected final Oid getOid(int column)
                    throws SQLException

Gets column OID

Specified by:

getOid in class AbstractResultSetMetaData

Parameters:

column - Column index

Returns:

column OID

Throws:

SQLException - if an error occurs

getFieldLength

protected final int getFieldLength(int column)
                            throws SQLException

Gets column length. This method is called if the AbstractResultSet does not know how to get column length according to type OID. We retutn 0 because we don't know the proper length either.

Specified by:

getFieldLength in class AbstractResultSetMetaData

Parameters:

column - Column index

Returns:

column length

Throws:

SQLException - if an error occurs