graphql.relay

Class SimpleListConnection<T>

java.lang.Object

graphql.relay.SimpleListConnection<T>

All Implemented Interfaces:

DataFetcher<Connection<T>>

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

Constructor Summary

Constructors

Constructor and Description
SimpleListConnection(java.util.List<T> data)
SimpleListConnection(java.util.List<T> data, java.lang.String prefix)

Method Summary

Modifier and Type	Method and Description
ConnectionCursor	cursorForObjectInConnection(T object) find the object's cursor, or null if the object is not in this connection.
Connection<T>	get(DataFetchingEnvironment environment) This is called by the graphql engine to fetch the value.
boolean	isTrivialDataFetcher() If a data fetcher is simply mapping data from an object to a field, it can be considered a trivial data fetcher for the purposes of tracing and so on.

Methods inherited from class java.lang.Object

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

Constructor Detail

SimpleListConnection

public SimpleListConnection(java.util.List<T> data,
                            java.lang.String prefix)

SimpleListConnection

public SimpleListConnection(java.util.List<T> data)

Method Detail

isTrivialDataFetcher

public boolean isTrivialDataFetcher()

Description copied from interface: DataFetcher

If a data fetcher is simply mapping data from an object to a field, it can be considered a trivial data fetcher for the purposes of tracing and so on.

Specified by:

isTrivialDataFetcher in interface DataFetcher<Connection<T>>

Returns:

true if the data fetcher can be considered a trivial data fetcher.

get

public Connection<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<Connection<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. May be wrapped in a DataFetcherResult

cursorForObjectInConnection

public ConnectionCursor cursorForObjectInConnection(T object)

find the object's cursor, or null if the object is not in this connection.

Parameters:

object - the object in play

Returns:

a connection cursor