Package org.springframework.graphql.data.query

Class AbstractSortStrategy

java.lang.Object

org.springframework.graphql.data.query.AbstractSortStrategy

All Implemented Interfaces:

SortStrategy

public abstract class AbstractSortStrategy
extends Object
implements SortStrategy

Convenient base class for a SortStrategy. Subclasses help to extract the list of sort properties and direction.

Since:

1.2.0

Author:

Rossen Stoyanchev

Constructor Summary

Constructors

Constructor	Description
AbstractSortStrategy()

Method Summary

Modifier and Type	Method	Description
org.springframework.data.domain.Sort	extract(DataFetchingEnvironment environment)	Return a Sort instance by extracting the sort information from GraphQL arguments, or Sort.unsorted() otherwise.
protected abstract org.springframework.data.domain.Sort.Direction	getDirection(DataFetchingEnvironment environment)	Return the sort direction to use, or null.
protected abstract List<String>	getProperties(DataFetchingEnvironment environment)	Return the sort properties to use, or an empty list if there are none.

Methods inherited from class java.lang.Object

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

Constructor Details

AbstractSortStrategy

public AbstractSortStrategy()

Method Details

extract

public org.springframework.data.domain.Sort extract(DataFetchingEnvironment environment)

Description copied from interface: SortStrategy

Return a Sort instance by extracting the sort information from GraphQL arguments, or Sort.unsorted() otherwise.

Specified by:

extract in interface SortStrategy

Parameters:

environment - the data fetching environment

getProperties

protected abstract List<String> getProperties(DataFetchingEnvironment environment)

Return the sort properties to use, or an empty list if there are none.

Parameters:

environment - the data fetching environment for this operation

getDirection

@Nullable
protected abstract org.springframework.data.domain.Sort.Direction getDirection(DataFetchingEnvironment environment)

Return the sort direction to use, or null.

Parameters:

environment - the data fetching environment for this operation