graphql.language

Class NullValue

java.lang.Object

graphql.language.AbstractNode<NullValue>

graphql.language.NullValue

All Implemented Interfaces:

Node<NullValue>, Value<NullValue>, java.io.Serializable

@PublicApi
public class NullValue
extends AbstractNode<NullValue>
implements Value<NullValue>

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	NullValue.Builder

Field Summary

Fields

Modifier and Type	Field and Description
static NullValue	Null

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	NullValue(SourceLocation sourceLocation, java.util.List<Comment> comments)

Method Summary

Modifier and Type	Method and Description
TraversalControl	accept(TraverserContext<Node> context, NodeVisitor visitor) Double-dispatch entry point.
NullValue	deepCopy()
java.util.List<Node>	getChildren()
boolean	isEqualTo(Node o) Compares just the content and not the children.
static NullValue.Builder	newNullValue()
java.lang.String	toString()

Methods inherited from class graphql.language.AbstractNode

deepCopy, deepCopy, getComments, getSourceLocation

Methods inherited from class java.lang.Object

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

Methods inherited from interface graphql.language.Node

getComments, getSourceLocation

Field Detail

Null

public static final NullValue Null

Constructor Detail

NullValue

protected NullValue(SourceLocation sourceLocation,
                    java.util.List<Comment> comments)

Method Detail

getChildren

public java.util.List<Node> getChildren()

Specified by:

getChildren in interface Node<NullValue>

Returns:

a list of the children of this node

isEqualTo

public boolean isEqualTo(Node o)

Description copied from interface: Node

Compares just the content and not the children.

Specified by:

isEqualTo in interface Node<NullValue>

Parameters:

o - the other node to compare to

Returns:

isEqualTo

deepCopy

public NullValue deepCopy()

Specified by:

deepCopy in interface Node<NullValue>

Returns:

a deep copy of this node

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

accept

public TraversalControl accept(TraverserContext<Node> context,
                               NodeVisitor visitor)

Description copied from interface: Node

Double-dispatch entry point. A node receives a Visitor instance and then calls a method on a Visitor that corresponds to a actual type of this Node. This binding however happens at the compile time and therefore it allows to save on rather expensive reflection based instanceOf check when decision based on the actual type of Node is needed, which happens redundantly during traversing AST. Additional advantage of this pattern is to decouple tree traversal mechanism from the code that needs to be executed when traversal "visits" a particular Node in the tree. This leads to a better code re-usability and maintainability.

Specified by:

accept in interface Node<NullValue>

Parameters:

context - TraverserContext bound to this Node object

visitor - Visitor instance that performs actual processing on the Nodes(s)

Returns:

Result of Visitor's operation. Note! Visitor's operation might return special results to control traversal process.

newNullValue

public static NullValue.Builder newNullValue()