com.db4o.constraints

Class UniqueFieldValueConstraint

java.lang.Object

com.db4o.constraints.UniqueFieldValueConstraint

All Implemented Interfaces:

ConfigurationItem

public class UniqueFieldValueConstraint
extends java.lang.Object
implements ConfigurationItem

Configures a field of a class to allow unique values only. In C/S mode, this configuration should be set on the server side only.

Field Summary

Fields

Modifier and Type	Field and Description
protected java.lang.Object	_clazz
protected java.lang.String	_fieldName

Constructor Summary

Constructors

Constructor and Description
UniqueFieldValueConstraint(java.lang.Object clazz, java.lang.String fieldName) constructor to create a UniqueFieldValueConstraint.

Method Summary

Methods

Modifier and Type	Method and Description
void	apply(InternalObjectContainer objectContainer) internal method, public for implementation reasons.
void	prepare(Configuration configuration) Gives a chance for the item to augment the configuration.

Methods inherited from class java.lang.Object

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

Field Detail

_clazz

protected final java.lang.Object _clazz

_fieldName

protected final java.lang.String _fieldName

Constructor Detail

UniqueFieldValueConstraint

public UniqueFieldValueConstraint(java.lang.Object clazz,
                          java.lang.String fieldName)

constructor to create a UniqueFieldValueConstraint.

Parameters:

clazz - can be a class (Java) / Type (.NET) / instance of the class / fully qualified class name

fieldName - the name of the field that is to be unique.

Method Detail

prepare

public void prepare(Configuration configuration)

Description copied from interface: ConfigurationItem

Gives a chance for the item to augment the configuration.

Specified by:

prepare in interface ConfigurationItem

Parameters:

configuration - the configuration that the item was added to

apply

public void apply(InternalObjectContainer objectContainer)

internal method, public for implementation reasons.

Specified by:

apply in interface ConfigurationItem

Parameters:

objectContainer - the ObjectContainer to configure