graphql.schema

Class FieldDataFetcher<T>

java.lang.Object

graphql.schema.FieldDataFetcher<T>

All Implemented Interfaces:

DataFetcher<T>

@PublicApi
public class FieldDataFetcher<T>
extends java.lang.Object
implements DataFetcher<T>

Fetches data directly from a named java object field.

Constructor Summary

Constructors

Constructor and Description
FieldDataFetcher(java.lang.String fieldName) Constructs a new data fetcher that tries to find values from the name field, using DataFetchingEnvironment.getSource() as the source object.

Method Summary

Modifier and Type	Method and Description
T	get(DataFetchingEnvironment environment) This is called by the graphql engine to fetch the value.

Methods inherited from class java.lang.Object

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

Constructor Detail

FieldDataFetcher

public FieldDataFetcher(java.lang.String fieldName)

Constructs a new data fetcher that tries to find values from the name field, using DataFetchingEnvironment.getSource() as the source object.

Parameters:

fieldName - The name of the field.

Method Detail

get

public T get(DataFetchingEnvironment environment)

Description copied from interface: DataFetcher

This is called by the graphql engine to fetch the value. The DataFetchingEnvironment is a composite context object that tells you all you need to know about who to fetch a data value in graphql type terms.

Specified by:

get in interface DataFetcher<T>

Parameters:

environment - this is the data fetching environment which contains all the context you need to fetch a value

Returns:

a value of type T