Class ColumnMetaData

java.lang.Object

org.apache.derby.client.am.ColumnMetaData

All Implemented Interfaces:

ResultSetMetaData, Wrapper

public class ColumnMetaData
extends Object
implements ResultSetMetaData

Field Summary

Fields

Modifier and Type	Field	Description
int[]	clientParamtertype_
private Hashtable<String,Integer>	columnNameToIndexCache_
int	columns_
private LogWriter	logWriter_
boolean[]	nullable_
int[][]	protocolTypesCache_
(package private) int	resultSetConcurrency_
int[]	sqlCcsid_
String[]	sqlComment_
short	sqldFcode_
short	sqldHold_
short	sqldKeytype_
String	sqldRdbnam_
short	sqldReturn_
String	sqldSchema_
short	sqldScroll_
short	sqldSensitive_
String[]	sqlLabel_
long[]	sqlLength_
String[]	sqlName_
int[]	sqlPrecision_
int[]	sqlScale_
int[]	sqlType_
String[]	sqlUDTclassName_
String[]	sqlUDTname_
short[]	sqlUnnamed_
String[]	sqlxBasename_
String[]	sqlxCorname_
short[]	sqlxGenerated_
short[]	sqlxKeymem_
String[]	sqlxName_
short[]	sqlxParmmode_
String[]	sqlxRdbnam_
String[]	sqlxSchema_
int[]	sqlxUpdatable_
private boolean	statementClosed_
int[]	types_

Fields inherited from interface ResultSetMetaData

columnNoNulls, columnNullable, columnNullableUnknown

Constructor Summary

Constructors

Constructor	Description
ColumnMetaData(LogWriter logWriter)
ColumnMetaData(LogWriter logWriter, int upperBound)

Method Summary

Modifier and Type	Method	Description
private void	assignColumnName(int column)
private void	checkForClosedStatement()
(package private) void	checkForValidColumnIndex(int column)
(package private) int	findColumnX(String columnName)
String	getCatalogName(int column)	What's a column's table's catalog name?
String	getColumnClassName(int column)
int	getColumnCount()
int	getColumnDisplaySize(int column)
String	getColumnLabel(int column)
String	getColumnName(int column)
int	getColumnType(int column)
String	getColumnTypeName(int column)
int	getPrecision(int column)
int	getScale(int column)
String	getSchemaName(int column)
String	getTableName(int column)
(package private) boolean	hasLobColumns()
void	initializeCache(int upperBound)
boolean	isAutoIncrement(int column)
boolean	isCaseSensitive(int column)
boolean	isCurrency(int column)
boolean	isDefinitelyWritable(int column)
int	isNullable(int column)
boolean	isReadOnly(int column)
boolean	isSearchable(int column)
boolean	isSigned(int column)
boolean	isWrapperFor(Class<?> iface)	Check whether this instance wraps an object that implements the interface specified by iface.
boolean	isWritable(int column)
(package private) void	markClosed()
private void	nullDataForGC()
void	setLogWriter(LogWriter logWriter)
<T> T	unwrap(Class<T> iface)	Returns this if this class implements the specified interface.

Methods inherited from class Object

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

Field Details

columns_

public int columns_

nullable_

public boolean[] nullable_

sqldHold_

public short sqldHold_

sqldReturn_

public short sqldReturn_

sqldScroll_

public short sqldScroll_

sqldSensitive_

public short sqldSensitive_

sqldFcode_

public short sqldFcode_

sqldKeytype_

public short sqldKeytype_

sqldRdbnam_

public String sqldRdbnam_

sqldSchema_

public String sqldSchema_

sqlPrecision_

public int[] sqlPrecision_

sqlScale_

public int[] sqlScale_

sqlLength_

public long[] sqlLength_

sqlType_

public int[] sqlType_

sqlCcsid_

public int[] sqlCcsid_

sqlName_

public String[] sqlName_

sqlLabel_

public String[] sqlLabel_

sqlUnnamed_

public short[] sqlUnnamed_

sqlComment_

public String[] sqlComment_

sqlUDTname_

public String[] sqlUDTname_

sqlUDTclassName_

public String[] sqlUDTclassName_

sqlxKeymem_

public short[] sqlxKeymem_

sqlxGenerated_

public short[] sqlxGenerated_

sqlxParmmode_

public short[] sqlxParmmode_

sqlxCorname_

public String[] sqlxCorname_

sqlxName_

public String[] sqlxName_

sqlxBasename_

public String[] sqlxBasename_

sqlxUpdatable_

public int[] sqlxUpdatable_

sqlxSchema_

public String[] sqlxSchema_

sqlxRdbnam_

public String[] sqlxRdbnam_

protocolTypesCache_

public transient int[][] protocolTypesCache_

types_

public transient int[] types_

clientParamtertype_

public transient int[] clientParamtertype_

logWriter_

private transient LogWriter logWriter_

resultSetConcurrency_

transient int resultSetConcurrency_

columnNameToIndexCache_

private transient Hashtable<String,Integer> columnNameToIndexCache_

statementClosed_

private transient boolean statementClosed_

Constructor Details

ColumnMetaData

public ColumnMetaData(LogWriter logWriter)

ColumnMetaData

public ColumnMetaData(LogWriter logWriter,
 int upperBound)

Method Details

markClosed

void markClosed()

checkForClosedStatement

private void checkForClosedStatement()
                              throws SqlException

Throws:

SqlException

initializeCache

public void initializeCache(int upperBound)

getColumnCount

public int getColumnCount()
                   throws SQLException

Specified by:

getColumnCount in interface ResultSetMetaData

Throws:

SQLException

isAutoIncrement

public boolean isAutoIncrement(int column)
                        throws SQLException

Specified by:

isAutoIncrement in interface ResultSetMetaData

Throws:

SQLException

isCaseSensitive

public boolean isCaseSensitive(int column)
                        throws SQLException

Specified by:

isCaseSensitive in interface ResultSetMetaData

Throws:

SQLException

isSearchable

public boolean isSearchable(int column)
                     throws SQLException

Specified by:

isSearchable in interface ResultSetMetaData

Throws:

SQLException

isCurrency

public boolean isCurrency(int column)
                   throws SQLException

Specified by:

isCurrency in interface ResultSetMetaData

Throws:

SQLException

isNullable

public int isNullable(int column)
               throws SQLException

Specified by:

isNullable in interface ResultSetMetaData

Throws:

SQLException

isSigned

public boolean isSigned(int column)
                 throws SQLException

Specified by:

isSigned in interface ResultSetMetaData

Throws:

SQLException

getColumnDisplaySize

public int getColumnDisplaySize(int column)
                         throws SQLException

Specified by:

getColumnDisplaySize in interface ResultSetMetaData

Throws:

SQLException

getColumnLabel

public String getColumnLabel(int column)
                      throws SQLException

Specified by:

getColumnLabel in interface ResultSetMetaData

Throws:

SQLException

getColumnName

public String getColumnName(int column)
                     throws SQLException

Specified by:

getColumnName in interface ResultSetMetaData

Throws:

SQLException

getSchemaName

public String getSchemaName(int column)
                     throws SQLException

Specified by:

getSchemaName in interface ResultSetMetaData

Throws:

SQLException

getPrecision

public int getPrecision(int column)
                 throws SQLException

Specified by:

getPrecision in interface ResultSetMetaData

Throws:

SQLException

getScale

public int getScale(int column)
             throws SQLException

Specified by:

getScale in interface ResultSetMetaData

Throws:

SQLException

getTableName

public String getTableName(int column)
                    throws SQLException

Specified by:

getTableName in interface ResultSetMetaData

Throws:

SQLException

getCatalogName

public String getCatalogName(int column)
                      throws SQLException

What's a column's table's catalog name?

Specified by:

getCatalogName in interface ResultSetMetaData

Parameters:

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

Returns:

column name or "" if not applicable.

Throws:

SQLException - thrown on failure

getColumnType

public int getColumnType(int column)
                  throws SQLException

Specified by:

getColumnType in interface ResultSetMetaData

Throws:

SQLException

getColumnTypeName

public String getColumnTypeName(int column)
                         throws SQLException

Specified by:

getColumnTypeName in interface ResultSetMetaData

Throws:

SQLException

isReadOnly

public boolean isReadOnly(int column)
                   throws SQLException

Specified by:

isReadOnly in interface ResultSetMetaData

Throws:

SQLException

isWritable

public boolean isWritable(int column)
                   throws SQLException

Specified by:

isWritable in interface ResultSetMetaData

Throws:

SQLException

isDefinitelyWritable

public boolean isDefinitelyWritable(int column)
                             throws SQLException

Specified by:

isDefinitelyWritable in interface ResultSetMetaData

Throws:

SQLException

getColumnClassName

public String getColumnClassName(int column)
                          throws SQLException

Specified by:

getColumnClassName in interface ResultSetMetaData

Throws:

SQLException

checkForValidColumnIndex

void checkForValidColumnIndex(int column)
                       throws SqlException

Throws:

SqlException

setLogWriter

public void setLogWriter(LogWriter logWriter)

nullDataForGC

private void nullDataForGC()

hasLobColumns

boolean hasLobColumns()

findColumnX

int findColumnX(String columnName)
         throws SqlException

Throws:

SqlException

assignColumnName

private void assignColumnName(int column)

isWrapperFor

public boolean isWrapperFor(Class<?> iface)
                     throws SQLException

Check whether this instance wraps an object that implements the interface specified by iface.

Specified by:

isWrapperFor in interface Wrapper

Parameters:

iface - a class defining an interface

Returns:

true if this instance implements iface, or false otherwise

Throws:

SQLException - if an error occurs while determining if this instance implements iface

unwrap

public <T> T unwrap(Class<T> iface)
             throws SQLException

Returns this if this class implements the specified interface.

Specified by:

unwrap in interface Wrapper

Parameters:

iface - a class defining an interface

Returns:

an object that implements the interface

Throws:

SQLException - if no object is found that implements the interface