org.firebirdsql.jdbc

Class FBParameterMetaData

java.lang.Object

org.firebirdsql.jdbc.AbstractFieldMetaData

org.firebirdsql.jdbc.FBParameterMetaData

All Implemented Interfaces:

ParameterMetaData, Wrapper, FirebirdParameterMetaData

public class FBParameterMetaData
extends AbstractFieldMetaData
implements FirebirdParameterMetaData

An object that can be used to get information about the types and properties for each parameter marker in a PreparedStatement object.

Version:

1.0

Author:

Nickolay Samofatov, Mark Rotteveel

Nested Class Summary

Nested classes/interfaces inherited from class org.firebirdsql.jdbc.AbstractFieldMetaData

AbstractFieldMetaData.ExtendedFieldInfo, AbstractFieldMetaData.FieldKey

Field Summary

Fields inherited from interface java.sql.ParameterMetaData

parameterModeIn, parameterModeInOut, parameterModeOut, parameterModeUnknown, parameterNoNulls, parameterNullable, parameterNullableUnknown

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	FBParameterMetaData(RowDescriptor rowDescriptor, FBConnection connection) Creates a new FBParameterMetaData instance.

Method Summary

Modifier and Type	Method and Description
protected Map<AbstractFieldMetaData.FieldKey,AbstractFieldMetaData.ExtendedFieldInfo>	getExtendedFieldInfo(FBConnection connection) This method retrieves extended information from the system tables in a database.
String	getParameterClassName(int parameter)
int	getParameterCount()
int	getParameterMode(int parameter)
int	getParameterType(int parameter)
String	getParameterTypeName(int parameter)
int	getPrecision(int parameter)
int	getScale(int parameter)
int	isNullable(int parameter)
boolean	isSigned(int parameter)

Methods inherited from class org.firebirdsql.jdbc.AbstractFieldMetaData

estimateFixedPrecision, getExtFieldInfo, getFieldClassName, getFieldCount, getFieldDescriptor, getFieldType, getFieldTypeName, getPrecisionInternal, getRowDescriptor, getScaleInternal, isSignedInternal, isWrapperFor, unwrap

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.sql.Wrapper

isWrapperFor, unwrap

Constructor Detail

FBParameterMetaData

protected FBParameterMetaData(RowDescriptor rowDescriptor,
                              FBConnection connection)
                       throws SQLException

Creates a new FBParameterMetaData instance.

Parameters:

rowDescriptor - a row descriptor

connection - a FBConnection value

Throws:

SQLException - if an error occurs

Method Detail

getParameterCount

public int getParameterCount()
                      throws SQLException

Specified by:

getParameterCount in interface ParameterMetaData

Throws:

SQLException

isNullable

public int isNullable(int parameter)
               throws SQLException

Specified by:

isNullable in interface ParameterMetaData

Throws:

SQLException

isSigned

public boolean isSigned(int parameter)
                 throws SQLException

Specified by:

isSigned in interface ParameterMetaData

Throws:

SQLException

getPrecision

public int getPrecision(int parameter)
                 throws SQLException

NOTE For NUMERIC and DECIMAL the reported precision is the maximum precision allowed by the underlying storage data type, it is not the declared precision.

Specified by:

getPrecision in interface ParameterMetaData

Throws:

SQLException

getScale

public int getScale(int parameter)
             throws SQLException

Specified by:

getScale in interface ParameterMetaData

Throws:

SQLException

getParameterType

public int getParameterType(int parameter)
                     throws SQLException

Specified by:

getParameterType in interface ParameterMetaData

Throws:

SQLException

getParameterTypeName

public String getParameterTypeName(int parameter)
                            throws SQLException

Specified by:

getParameterTypeName in interface ParameterMetaData

Throws:

SQLException

getParameterClassName

public String getParameterClassName(int parameter)
                             throws SQLException

Specified by:

getParameterClassName in interface ParameterMetaData

Throws:

SQLException

getParameterMode

public int getParameterMode(int parameter)
                     throws SQLException

Specified by:

getParameterMode in interface ParameterMetaData

Throws:

SQLException

getExtendedFieldInfo

protected Map<AbstractFieldMetaData.FieldKey,AbstractFieldMetaData.ExtendedFieldInfo> getExtendedFieldInfo(FBConnection connection)
                                                                                                    throws SQLException

This method retrieves extended information from the system tables in a database. Since this method is expensive, use it with care.

FBParameterMetaData does not support extended field info, so it always returns an empty Map.

Specified by:

getExtendedFieldInfo in class AbstractFieldMetaData

Returns:

mapping between AbstractFieldMetaData.FieldKey instances and AbstractFieldMetaData.ExtendedFieldInfo instances, or an empty Map if the metadata implementation does not support extended info.

Throws:

SQLException - if a database error occurs while obtaining extended field information.