Package graphql.schema

Class GraphQLDirective

java.lang.Object

graphql.schema.GraphQLDirective

All Implemented Interfaces:

GraphQLNamedSchemaElement, GraphQLSchemaElement

@PublicApi
public class GraphQLDirective
extends Object
implements GraphQLNamedSchemaElement

A directive can be used to modify the behavior of a graphql field or type.

See http://graphql.org/learn/queries/#directives for more details on the concept.

A directive has a definition, that is what arguments it takes, and it can also be applied to other schema elements. Originally graphql-java re-used the GraphQLDirective and GraphQLArgument classes to do both purposes. This was a modelling mistake. New GraphQLAppliedDirective and GraphQLAppliedDirectiveArgument classes have been introduced to better model when a directive is applied to a schema element, as opposed to its schema definition itself.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	GraphQLDirective.Builder

Field Summary

Fields

Modifier and Type	Field	Description
static final String	CHILD_ARGUMENTS

Method Summary

Modifier and Type	Method	Description
TraversalControl	accept(TraverserContext<GraphQLSchemaElement> context, GraphQLTypeVisitor visitor)
GraphQLSchemaElement	copy()	Each GraphQLSchemaElement should make a copy of itself when this is called.
final boolean	equals(Object o)	No GraphQLSchemaElement implements `equals` because we need object identity to treat a GraphQLSchema as an abstract graph.
GraphQLArgument	getArgument(String name)
List<GraphQLArgument>	getArguments()
List<GraphQLSchemaElement>	getChildren()
SchemaElementChildrenContainer	getChildrenWithTypeReferences()
DirectiveDefinition	getDefinition()	The AST Node this schema element is based on.
String	getDescription()
String	getName()
final int	hashCode()	No GraphQLSchemaElement implements `equals/hashCode` because we need object identity to treat a GraphQLSchema as an abstract graph.
boolean	isNonRepeatable()
boolean	isRepeatable()
static GraphQLDirective.Builder	newDirective()
static GraphQLDirective.Builder	newDirective(GraphQLDirective existing)
GraphQLAppliedDirective	toAppliedDirective()	This method can be used to turn a directive that was being use as an applied directive into one.
String	toString()
GraphQLDirective	transform(Consumer<GraphQLDirective.Builder> builderConsumer)	This helps you transform the current GraphQLDirective into another one by starting a builder with all the current values and allows you to transform it how you want.
EnumSet<Introspection.DirectiveLocation>	validLocations()
GraphQLDirective	withNewChildren(SchemaElementChildrenContainer newChildren)

Methods inherited from class java.lang.Object

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

Field Details

CHILD_ARGUMENTS

public static final String CHILD_ARGUMENTS

See Also:

• Constant Field Values

Method Details

getName

public String getName()

Specified by:

getName in interface GraphQLNamedSchemaElement

Returns:

the name of this element. This cant be null

isRepeatable

public boolean isRepeatable()

isNonRepeatable

public boolean isNonRepeatable()

getArguments

public List<GraphQLArgument> getArguments()

getArgument

public GraphQLArgument getArgument(String name)

validLocations

public EnumSet<Introspection.DirectiveLocation> validLocations()

getDescription

public String getDescription()

Specified by:

getDescription in interface GraphQLNamedSchemaElement

Returns:

the description of this element. This can be null

getDefinition

public DirectiveDefinition getDefinition()

Description copied from interface: GraphQLNamedSchemaElement

The AST Node this schema element is based on. Is null if the GraphQLSchema is not based on a SDL document. Some elements also have additional extension Nodes. See for example GraphQLObjectType.getExtensionDefinitions()

Specified by:

getDefinition in interface GraphQLNamedSchemaElement

Returns:

Node which this element is based on. Can be null.

toString

public String toString()

Overrides:

toString in class Object

transform

public GraphQLDirective transform(Consumer<GraphQLDirective.Builder> builderConsumer)

This helps you transform the current GraphQLDirective into another one by starting a builder with all the current values and allows you to transform it how you want.

Parameters:

builderConsumer - the consumer code that will be given a builder to transform

Returns:

a new field based on calling build on that builder

copy

public GraphQLSchemaElement copy()

Description copied from interface: GraphQLSchemaElement

Each GraphQLSchemaElement should make a copy of itself when this is called. The copy should be included its current contents as they currently exist into a new object.

Specified by:

copy in interface GraphQLSchemaElement

Returns:

a copy of this element

accept

public TraversalControl accept(TraverserContext<GraphQLSchemaElement> context,
 GraphQLTypeVisitor visitor)

Specified by:

accept in interface GraphQLSchemaElement

getChildren

public List<GraphQLSchemaElement> getChildren()

Specified by:

getChildren in interface GraphQLSchemaElement

getChildrenWithTypeReferences

public SchemaElementChildrenContainer getChildrenWithTypeReferences()

Specified by:

getChildrenWithTypeReferences in interface GraphQLSchemaElement

withNewChildren

public GraphQLDirective withNewChildren(SchemaElementChildrenContainer newChildren)

Specified by:

withNewChildren in interface GraphQLSchemaElement

toAppliedDirective

public GraphQLAppliedDirective toAppliedDirective()

This method can be used to turn a directive that was being use as an applied directive into one.

Returns:

an GraphQLAppliedDirective

equals

public final boolean equals(Object o)

No GraphQLSchemaElement implements `equals` because we need object identity to treat a GraphQLSchema as an abstract graph.

Specified by:

equals in interface GraphQLSchemaElement

Overrides:

equals in class Object

Parameters:

o - the reference object with which to compare.

Returns:

true if this object is the same as the obj argument; false otherwise.

hashCode

public final int hashCode()

No GraphQLSchemaElement implements `equals/hashCode` because we need object identity to treat a GraphQLSchema as an abstract graph.

Specified by:

hashCode in interface GraphQLSchemaElement

Overrides:

hashCode in class Object

Returns:

a hash code value for this object.

newDirective

public static GraphQLDirective.Builder newDirective()

newDirective

public static GraphQLDirective.Builder newDirective(GraphQLDirective existing)