Package graphql.relay

Class SimpleListConnection<T>

java.lang.Object

graphql.relay.SimpleListConnection<T>

All Implemented Interfaces:

DataFetcher<Connection<T>>, TrivialDataFetcher<Connection<T>>

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

Field Summary

Fields

Modifier and Type	Field	Description
private java.util.List<T>	data
(package private) static java.lang.String	DUMMY_CURSOR_PREFIX
private java.lang.String	prefix

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method	Description
private java.util.List<Edge<T>>	buildEdges()
private java.lang.String	createCursor(int offset)
ConnectionCursor	cursorForObjectInConnection(T object)	find the object's cursor, or null if the object is not in this connection.
private Connection<T>	emptyConnection()
Connection<T>	get(DataFetchingEnvironment environment)	This is called by the graphql engine to fetch the value.
private int	getOffsetFromCursor(java.lang.String cursor, int defaultValue)

Methods inherited from class java.lang.Object

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

Field Detail

DUMMY_CURSOR_PREFIX

static final java.lang.String DUMMY_CURSOR_PREFIX

See Also:

Constant Field Values

prefix

private final java.lang.String prefix

data

private final java.util.List<T> data

Constructor Detail

SimpleListConnection

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

SimpleListConnection

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

Method Detail

buildEdges

private java.util.List<Edge<T>> buildEdges()

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 how 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. May be wrapped in a DataFetcherResult

emptyConnection

private Connection<T> emptyConnection()

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

getOffsetFromCursor

private int getOffsetFromCursor(java.lang.String cursor,
                                int defaultValue)

createCursor

private java.lang.String createCursor(int offset)