com.allanbank.mongodb.bson.element

Class NullElement

java.lang.Object

com.allanbank.mongodb.bson.element.AbstractElement

com.allanbank.mongodb.bson.element.NullElement

All Implemented Interfaces:

Element, ElementAssignable, Serializable

public class NullElement
extends AbstractElement

A wrapper for a BSON null.

See Also:

Serialized Form

API Notice:

This class is part of the driver's API. Public and protected members will be deprecated for at least 1 non-bugfix release (version numbers are <major>.<minor>.<bugfix>) before being removed or modified.

Copyright ©:

2011-2012, Allanbank Consulting, Inc., All Rights Reserved

Field Summary

Fields

Modifier and Type	Field and Description
static ElementType	TYPE The BSON type for a binary.

Fields inherited from class com.allanbank.mongodb.bson.element.AbstractElement

ELEMENT_TYPE

Constructor Summary

Constructors

Constructor and Description
NullElement(String name) Constructs a new NullElement.

Method Summary

Methods

Modifier and Type	Method and Description
void	accept(Visitor visitor) Accepts the visitor and calls the Visitor.visitNull(java.lang.String) method.
ElementType	getType() Returns the type for the BSON type.
NullElement	withName(String name) Creates a new element with the same type and value as this element but with the specified name.

Methods inherited from class com.allanbank.mongodb.bson.element.AbstractElement

asElement, equals, find, find, findFirst, findFirst, getName, hashCode, nullSafeEquals, queryPath, queryPath, toString

Methods inherited from class java.lang.Object

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

Field Detail

TYPE

public static final ElementType TYPE

The BSON type for a binary.

Constructor Detail

NullElement

public NullElement(String name)

Constructs a new NullElement.

Parameters:

name - The name for the BSON null.

Throws:

IllegalArgumentException - If the name is null.

Method Detail

accept

public void accept(Visitor visitor)

Accepts the visitor and calls the Visitor.visitNull(java.lang.String) method.

Parameters:

visitor - The visitor for the element.

See Also:

Element.accept(Visitor)

getType

public ElementType getType()

Returns the type for the BSON type.

Returns:

The type for the BSON type.

withName

public NullElement withName(String name)

Creates a new element with the same type and value as this element but with the specified name. This is useful when creating a query across a set of collections where the filed name changes in the collections but the values must be identical.

Returns a new NullElement.

Parameters:

name - The new name for the element.

Returns:

The created element.