graphql.execution

Class ExecutionStepInfo

java.lang.Object

graphql.execution.ExecutionStepInfo

@PublicApi
public class ExecutionStepInfo
extends java.lang.Object

As the graphql query executes, it forms a hierarchy from parent fields (and their type) to their child fields (and their type) until a scalar type is encountered; this class captures that execution type information.

The static graphql type system (rightly) does not contain a hierarchy of child to parent types nor the nonnull ness of type instances, so this helper class adds this information during query execution.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ExecutionStepInfo.Builder

Method Summary

Modifier and Type	Method and Description
ExecutionStepInfo	changeTypeWithPreservedNonNull(GraphQLOutputType newType) This allows you to morph a type into a more specialized form yet return the same parent and non-null ness, for example taking a GraphQLInterfaceType and turning it into a specific GraphQLObjectType after type resolution has occurred
<T> T	getArgument(java.lang.String name) Returns the named argument
java.util.Map<java.lang.String,java.lang.Object>	getArguments()
MergedField	getField() This returns the AST fields that matches the getFieldDefinition() during execution
GraphQLFieldDefinition	getFieldDefinition() This returns the field definition that is in play when this type info was created or null if the type is a root query type
ExecutionStepInfo	getParent()
ExecutionPath	getPath()
GraphQLOutputType	getType() This returns the type for the current step.
GraphQLOutputType	getUnwrappedNonNullType() This returns the type which is unwrapped if it was GraphQLNonNull wrapped
boolean	hasParent()
boolean	isListType()
boolean	isNonNullType()
static ExecutionStepInfo.Builder	newExecutionStepInfo()
static ExecutionStepInfo.Builder	newExecutionStepInfo(ExecutionStepInfo existing)
java.lang.String	simplePrint()
java.lang.String	toString()
ExecutionStepInfo	transform(java.util.function.Consumer<ExecutionStepInfo.Builder> builderConsumer)

Methods inherited from class java.lang.Object

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

Method Detail

getType

public GraphQLOutputType getType()

This returns the type for the current step.

Returns:

the graphql type in question

getUnwrappedNonNullType

public GraphQLOutputType getUnwrappedNonNullType()

This returns the type which is unwrapped if it was GraphQLNonNull wrapped

Returns:

the graphql type in question

getFieldDefinition

public GraphQLFieldDefinition getFieldDefinition()

This returns the field definition that is in play when this type info was created or null if the type is a root query type

Returns:

the field definition or null if there is not one

getField

public MergedField getField()

This returns the AST fields that matches the getFieldDefinition() during execution

Returns:

the merged fields

getPath

public ExecutionPath getPath()

Returns:

the ExecutionPath to this info

isNonNullType

public boolean isNonNullType()

Returns:

true if the type must be nonnull

isListType

public boolean isListType()

Returns:

true if the type is a list

getArguments

public java.util.Map<java.lang.String,java.lang.Object> getArguments()

Returns:

the resolved arguments that have been passed to this field

getArgument

public <T> T getArgument(java.lang.String name)

Returns the named argument

Type Parameters:

T - you decide what type it is

Parameters:

name - the name of the argument

Returns:

the named argument or null if its not present

getParent

public ExecutionStepInfo getParent()

Returns:

the parent type information

hasParent

public boolean hasParent()

Returns:

true if the type has a parent (most do)

changeTypeWithPreservedNonNull

public ExecutionStepInfo changeTypeWithPreservedNonNull(GraphQLOutputType newType)

This allows you to morph a type into a more specialized form yet return the same parent and non-null ness, for example taking a GraphQLInterfaceType and turning it into a specific GraphQLObjectType after type resolution has occurred

Parameters:

newType - the new type to be

Returns:

a new type info with the same

simplePrint

public java.lang.String simplePrint()

Returns:

the type in graphql SDL format, eg [typeName!]!

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

transform

public ExecutionStepInfo transform(java.util.function.Consumer<ExecutionStepInfo.Builder> builderConsumer)

newExecutionStepInfo

public static ExecutionStepInfo.Builder newExecutionStepInfo()

Returns:

a builder of type info

newExecutionStepInfo

public static ExecutionStepInfo.Builder newExecutionStepInfo(ExecutionStepInfo existing)