Package io.leangen.graphql.metadata

Class Resolver

java.lang.Object

io.leangen.graphql.metadata.Resolver

public class Resolver
extends Object

Class representing a single method used to resolve a specific query given specific arguments. A single query can have multiple resolvers, corresponding to different combinations of arguments. This is done mainly to support attaching multiple overloaded methods as resolvers for the same query. Two resolvers of the same query must not accept the same list of argument names.

Author:

bojan.tomic (kaqqao)

Constructor Summary

Constructors

Constructor	Description
Resolver(String operationName, String operationDescription, String operationDeprecationReason, boolean batched, Executable<?> executable, TypedElement typedElement, List<OperationArgument> arguments, String complexityExpression)

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object that)
List<OperationArgument>	getArguments()
String	getComplexityExpression()
Executable<?>	getExecutable()
String	getOperationDeprecationReason()
String	getOperationDescription()
String	getOperationName()
Class<?>	getRawReturnType()
AnnotatedType	getReturnType()
Set<Type>	getSourceTypes()	Gets the generic Java types of the source objects (object returned by the parent query), if one is accepted by this resolver.
TypedElement	getTypedElement()
int	hashCode()
boolean	isAsync()
boolean	isBatched()
Object	resolve(Object source, Object[] args)	Calls the underlying resolver method/field
String	toString()
protected void	validateBatching(String executableSignature, AnnotatedType returnType, Set<OperationArgument> contextArguments)

Methods inherited from class java.lang.Object

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

Constructor Detail

Resolver

public Resolver(String operationName,
                String operationDescription,
                String operationDeprecationReason,
                boolean batched,
                Executable<?> executable,
                TypedElement typedElement,
                List<OperationArgument> arguments,
                String complexityExpression)

Method Detail

validateBatching

protected void validateBatching(String executableSignature,
                                AnnotatedType returnType,
                                Set<OperationArgument> contextArguments)

resolve

public Object resolve(Object source,
                      Object[] args)
               throws InvocationTargetException,
                      IllegalAccessException

Calls the underlying resolver method/field

Parameters:

source - The object on which the method/field is to be called

args - Arguments to the underlying method (empty if the underlying resolver is a field)

Returns:

The result returned by the underlying method/field

Throws:

InvocationTargetException - If a reflective invocation of the underlying method/field fails

IllegalAccessException - If a reflective invocation of the underlying method/field is not allowed

getSourceTypes

public Set<Type> getSourceTypes()

Gets the generic Java types of the source objects (object returned by the parent query), if one is accepted by this resolver. Used to decide if this query can be nested inside another.

Returns:

The generic Java type of the source object, or null if this resolver does not accept one.

getOperationName

public String getOperationName()

isBatched

public boolean isBatched()

isAsync

public boolean isAsync()

getOperationDescription

public String getOperationDescription()

getOperationDeprecationReason

public String getOperationDeprecationReason()

getArguments

public List<OperationArgument> getArguments()

getTypedElement

public TypedElement getTypedElement()

getReturnType

public AnnotatedType getReturnType()

getRawReturnType

public Class<?> getRawReturnType()

getComplexityExpression

public String getComplexityExpression()

getExecutable

public Executable<?> getExecutable()

equals

public boolean equals(Object that)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object