org.springframework.graphql.execution

Class ClassNameTypeResolver

java.lang.Object

org.springframework.graphql.execution.ClassNameTypeResolver

All Implemented Interfaces:

TypeResolver

public class ClassNameTypeResolver
extends Object
implements TypeResolver

TypeResolver that tries to find a GraphQL Object type based on the class name of a value returned from a DataFetcher. If necessary, it walks up the base class and interface hierarchy to find a match.

Since:

1.0.0

Author:

Rossen Stoyanchev

Constructor Summary

Constructors

Constructor and Description
ClassNameTypeResolver()

Method Summary

Modifier and Type	Method and Description
void	addMapping(Class<?> clazz, String graphQlTypeName) Add a mapping from a Java Class to a GraphQL Object type name.
GraphQLObjectType	getType(TypeResolutionEnvironment environment)
void	setClassNameExtractor(Function<Class<?>,String> classNameExtractor) Customize how the name of a class, or a base class/interface, is determined.

Methods inherited from class java.lang.Object

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

Constructor Detail

ClassNameTypeResolver

public ClassNameTypeResolver()

Method Detail

setClassNameExtractor

public void setClassNameExtractor(Function<Class<?>,String> classNameExtractor)

Customize how the name of a class, or a base class/interface, is determined. An application can use this to adapt to a common naming convention, e.g. remove an "Impl" suffix or a "Base" prefix, and so on.

By default, this is just Class.getSimpleName().

Parameters:

classNameExtractor - the function to use

addMapping

public void addMapping(Class<?> clazz,
                       String graphQlTypeName)

Add a mapping from a Java Class to a GraphQL Object type name. The mapping applies to the given type and to all of its sub-classes (for a base class) or implementations (for an interface).

Parameters:

clazz - the Java class to map

graphQlTypeName - the matching GraphQL object type

getType

@Nullable
public GraphQLObjectType getType(TypeResolutionEnvironment environment)

Specified by:

getType in interface TypeResolver