Package io.leangen.graphql.metadata.strategy.query

Class DefaultOperationBuilder

java.lang.Object

io.leangen.graphql.metadata.strategy.query.DefaultOperationBuilder

All Implemented Interfaces:

OperationBuilder

public class DefaultOperationBuilder
extends Object
implements OperationBuilder

Author:

Bojan Tomic (kaqqao)

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	DefaultOperationBuilder.TypeInference	NONE - No type inference.

Constructor Summary

Constructors

Constructor	Description
DefaultOperationBuilder(DefaultOperationBuilder.TypeInference typeInference)

Method Summary

Modifier and Type	Method	Description
Operation	buildMutation(Type context, List<Resolver> resolvers, GlobalEnvironment environment)
Operation	buildQuery(Type contextType, List<Resolver> resolvers, GlobalEnvironment environment)
Operation	buildSubscription(Type context, List<Resolver> resolvers, GlobalEnvironment environment)
protected List<OperationArgument>	collectArguments(String operationName, List<Resolver> resolvers)
protected boolean	isAsync(List<Resolver> resolvers)
protected boolean	isBatched(List<Resolver> resolvers)
protected AnnotatedType	resolveJavaType(String operationName, List<Resolver> resolvers, MessageBundle messageBundle)
protected String	resolveName(List<Resolver> resolvers)
protected AnnotatedType	unionize(AnnotatedType[] types, MessageBundle messageBundle)

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultOperationBuilder

public DefaultOperationBuilder(DefaultOperationBuilder.TypeInference typeInference)

Parameters:

typeInference - Controls automatic type inference if multiple resolver methods for the same operation return different types, or if different resolver methods specify arguments of the same name but of different types.

The inference process selects the most specific common super type of all the detected types.

This feature is off by default as it can lead to surprising results when used unconsciously.

Example:

 @GraphQLQuery(name = "numbers")
 public ArrayList getLongs(String paramOne) {...}

 @GraphQLQuery(name = "numbers")
 public LinkedList<Double> getDoubles(String paramTwo) {...}
 

The situation shown above would cause an exception without type inference enabled. With type inference, the return type would be treated as AbstractList<Number> as that is the most specific common super type of the two encountered types.

Method Detail

buildQuery

public Operation buildQuery(Type contextType,
                            List<Resolver> resolvers,
                            GlobalEnvironment environment)

Specified by:

buildQuery in interface OperationBuilder

buildMutation

public Operation buildMutation(Type context,
                               List<Resolver> resolvers,
                               GlobalEnvironment environment)

Specified by:

buildMutation in interface OperationBuilder

buildSubscription

public Operation buildSubscription(Type context,
                                   List<Resolver> resolvers,
                                   GlobalEnvironment environment)

Specified by:

buildSubscription in interface OperationBuilder

resolveName

protected String resolveName(List<Resolver> resolvers)

resolveJavaType

protected AnnotatedType resolveJavaType(String operationName,
                                        List<Resolver> resolvers,
                                        MessageBundle messageBundle)

collectArguments

protected List<OperationArgument> collectArguments(String operationName,
                                                   List<Resolver> resolvers)

isBatched

protected boolean isBatched(List<Resolver> resolvers)

isAsync

protected boolean isAsync(List<Resolver> resolvers)

unionize

protected AnnotatedType unionize(AnnotatedType[] types,
                                 MessageBundle messageBundle)