org.apache.derby.impl.jdbc

Class EmbedParameterMetaData30

java.lang.Object

org.apache.derby.impl.jdbc.EmbedParameterSetMetaData

org.apache.derby.impl.jdbc.EmbedParameterMetaData30

All Implemented Interfaces:

java.sql.ParameterMetaData, java.sql.Wrapper, EngineParameterMetaData

class EmbedParameterMetaData30
extends EmbedParameterSetMetaData
implements java.sql.ParameterMetaData

This class implements the ParameterMetaData interface from JDBC 3.0 and 4.0. It provides the parameter meta data for callable & prepared statements But note that the bulk of it resides in its parent class. The reason is we want to provide the functionality to the JDKs before JDBC3.0.

Supports

• JDBC 3.0 - java.sql.ParameterMetaData introduced in JDBC3
• JDBC 4.0 - extra methods from java.sql.Wrapper introduced in JDBC 4.0

See Also:

ParameterMetaData

Field Summary

Fields inherited from interface java.sql.ParameterMetaData

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

Constructor Summary

Constructors

Constructor and Description
EmbedParameterMetaData30(ParameterValueSet pvs, DataTypeDescriptor[] types)

Method Summary

Modifier and Type	Method and Description
boolean	isWrapperFor(java.lang.Class<?> iface) Returns false unless iface is implemented.
<T> T	unwrap(java.lang.Class<T> iface) Returns this if this class implements the specified interface.

Methods inherited from class org.apache.derby.impl.jdbc.EmbedParameterSetMetaData

getParameterClassName, getParameterCount, getParameterMode, getParameterType, getParameterTypeName, getPrecision, getScale, isNullable, isSigned

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.sql.ParameterMetaData

getParameterClassName, getParameterCount, getParameterMode, getParameterType, getParameterTypeName, getPrecision, getScale, isNullable, isSigned

Constructor Detail

EmbedParameterMetaData30

EmbedParameterMetaData30(ParameterValueSet pvs,
                         DataTypeDescriptor[] types)

Method Detail

isWrapperFor

public boolean isWrapperFor(java.lang.Class<?> iface)
                     throws java.sql.SQLException

Returns false unless iface is implemented.

Specified by:

isWrapperFor in interface java.sql.Wrapper

Parameters:

iface - a class defining an interface

Returns:

true if this implements the interface or directly or indirectly wraps an object that does

Throws:

java.sql.SQLException - if an error occurs while determining whether this is a wrapper for an object with the given interface.

unwrap

public <T> T unwrap(java.lang.Class<T> iface)
             throws java.sql.SQLException

Returns this if this class implements the specified interface.

Specified by:

unwrap in interface java.sql.Wrapper

Parameters:

iface - a class defining an interface

Returns:

an object that implements the interface

Throws:

java.sql.SQLException - if no object is found that implements the interface