com.daikit.graphql.datafetcher

Class GQLAbstractDataFetcher<FETCHED_DATA_TYPE>

java.lang.Object

com.daikit.graphql.datafetcher.GQLAbstractDataFetcher<FETCHED_DATA_TYPE>

Type Parameters:

FETCHED_DATA_TYPE - the fetched data type

All Implemented Interfaces:

graphql.schema.DataFetcher<FETCHED_DATA_TYPE>

Direct Known Subclasses:

GQLAbstractDeleteDataFetcher, GQLAbstractGetByIdDataFetcher, GQLAbstractGetListDataFetcher, GQLAbstractSaveDataFetcher, GQLCustomMethodDataFetcher

public abstract class GQLAbstractDataFetcher<FETCHED_DATA_TYPE>
extends Object
implements graphql.schema.DataFetcher<FETCHED_DATA_TYPE>

Abstract super class for all data fetchers

Author:

Thibaut Caselli

Constructor Summary

Constructors

Constructor and Description
GQLAbstractDataFetcher()

Method Summary

Modifier and Type	Method and Description
protected Map<String,Object>	convertObjectValue(graphql.language.ObjectValue objectValue, Map<String,Object> arguments) Convert GQL object value to a Map
protected Map<String,Object>	getArgumentsForContext(Map<String,Object> arguments, String argumentContext) Get arguments with given property name within parent's arguments map
protected List<Map<String,Object>>	getArgumentsForContextAsList(Map<String,Object> arguments, String argumentContext) Get arguments with given property name within parent's arguments map as a List
protected Object	getArgumentValue(graphql.language.Field queryField, String name, Map<String,Object> arguments) Get argument by name within given query field
protected String	getEntityName(String prefix, String queryName) Get entity by name
protected Collection<String>	getRequestProvidedVariableNames() Get provided variable names for the request
protected <T> T	mapValue(graphql.language.Argument argument, Map<String,Object> arguments) Map GQL argument value to an object
protected <T> T	mapValue(graphql.language.ObjectField field, Map<String,Object> arguments) Map GQL object field value to an object

Methods inherited from class java.lang.Object

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

Methods inherited from interface graphql.schema.DataFetcher

get

Constructor Detail

GQLAbstractDataFetcher

public GQLAbstractDataFetcher()

Method Detail

getRequestProvidedVariableNames

protected Collection<String> getRequestProvidedVariableNames()

Get provided variable names for the request

Returns:

a Collection of variable names

getEntityName

protected String getEntityName(String prefix,
                               String queryName)

Get entity by name

Parameters:

prefix - the entity prefix

queryName - the query name

Returns:

the entity name

mapValue

protected <T> T mapValue(graphql.language.ObjectField field,
                         Map<String,Object> arguments)

Map GQL object field value to an object

Type Parameters:

T - the mapped object type

Parameters:

field - the GQL ObjectField

arguments - the map of query arguments for potential replacements

Returns:

a mapped object value

mapValue

protected <T> T mapValue(graphql.language.Argument argument,
                         Map<String,Object> arguments)

Map GQL argument value to an object

Type Parameters:

T - the mapped object type

Parameters:

argument - the GQL Argument

arguments - the map of query arguments for potential replacements

Returns:

a mapped object value

getArgumentsForContext

protected Map<String,Object> getArgumentsForContext(Map<String,Object> arguments,
                                                    String argumentContext)

Get arguments with given property name within parent's arguments map

Parameters:

arguments - the parent's arguments map

argumentContext - the argument context name

Returns:

a Map (may be empty)

getArgumentsForContextAsList

protected List<Map<String,Object>> getArgumentsForContextAsList(Map<String,Object> arguments,
                                                                String argumentContext)

Get arguments with given property name within parent's arguments map as a List

Parameters:

arguments - the parent's arguments map

argumentContext - the argument context name

Returns:

a List of Map (may be empty)

convertObjectValue

protected Map<String,Object> convertObjectValue(graphql.language.ObjectValue objectValue,
                                                Map<String,Object> arguments)

Convert GQL object value to a Map

Parameters:

objectValue - the ObjectValue

arguments - the Map of arguments

Returns:

the converted map

getArgumentValue

protected Object getArgumentValue(graphql.language.Field queryField,
                                  String name,
                                  Map<String,Object> arguments)

Get argument by name within given query field

Parameters:

queryField - the query Field

name - then argument name

arguments - the Map of arguments

Returns:

the argument value