oracle.jbo.domain
Class NullValue

java.lang.Object
  oracle.jbo.domain.NullValue

All Implemented Interfaces:

DomainInterface, java.io.Serializable

public class NullValue

extends java.lang.Object

implements DomainInterface, java.io.Serializable

Provides a means of creating and serializing null Domain objects.

The zero-parameter constructors for each Domain type produce default objects, rather than null objects. Use the constructors for this class to produce typed null Domain objects.

Since:

JDeveloper 3.0

See Also:

Serialized Form

Constructor Summary

NullValue()
Creates a default null Domain object, of type VARCHAR.

NullValue(int sqlTypeId)
Creates a null value for a specified Domain type.

NullValue(java.lang.String sqlType)
Creates a null value for a specified Domain type.

Method Summary

boolean	equals(java.lang.Object obj) Tests this for equality with another object.
java.lang.Object	getData() Internal: Applications should not invoke this method.
java.lang.String	getSQLType() Converts this to string naming a JDBC type.
int	getSQLTypeId() Converts this to a JDBC type ID.
int	hashCode() Generates a hashcode for NullValue.
void	setContext(DomainOwnerInterface owner, Transaction trans, java.lang.Object ctx) Internal: Applications should not invoke this method.
java.lang.String	toString() For testing purposes only: converts this to a string.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

NullValue

public NullValue()

Creates a default null Domain object, of type VARCHAR.

NullValue

public NullValue(int sqlTypeId)

Creates a null value for a specified Domain type.

Parameters:

sqlTypeId - an integer representing a JDBC type.

See Also:

"java.sql.TYPES"

NullValue

public NullValue(java.lang.String sqlType)

Creates a null value for a specified Domain type.

Parameters:

sqlType - an string representing a JDBC type.

See Also:

JboTypeMap

Method Detail

getSQLTypeId

public int getSQLTypeId()

Converts this to a JDBC type ID.

See Also:

"java.sql.TYPES"

getSQLType

public java.lang.String getSQLType()

Converts this to string naming a JDBC type.

See Also:

JboTypeMap

getData

public java.lang.Object getData()

Internal: Applications should not invoke this method.

Converts this to a JDBC object.

Specified by:

getData in interface DomainInterface

Returns:

a formatted value object.

setContext

public void setContext(DomainOwnerInterface owner,
                       Transaction trans,
                       java.lang.Object ctx)

Internal: Applications should not invoke this method.

Specified by:

setContext in interface DomainInterface

toString

public java.lang.String toString()

For testing purposes only: converts this to a string.

hashCode

public int hashCode()

Generates a hashcode for NullValue.

Returns:

the hashcode.

equals

public boolean equals(java.lang.Object obj)

Tests this for equality with another object.

Parameters:

obj - an arbitrary Object.

Returns:

true if the parameter is either null, or a NullValue of the same Domain type as this.