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#383 added extra readme documentation for specific references #393

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Merged
andimarek merged 1 commit into from
Apr 30, 2017
+62 −2
Merged

#383 added extra readme documentation for specific references #393

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38 changes: 37 additions & 1 deletion README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -295,7 +295,43 @@ GraphQLObjectType person = newObject()
.build();

```


##### Specific Recursive Types

Certain situations require specific type classes as input. For example the possible union types inside a `GraphQLUnionType` are required
to be `GraphQLObjectType` objects. You can't use a `GraphQLTypeReference` in this case as it is not specifically that type.

You can use a `reference` method on each specific type to create a reference to that type.

```java
GraphQLObjectType objectReference = GraphQLObjectType.reference("ObjectReference");
GraphQLInterfaceType interfaceReference = GraphQLInterfaceType.reference("InterfaceReference");
GraphQLInputObjectType inputObjectReference = GraphQLInputObjectType.reference("InputObjectReference");

```

you would use this say like this :

```java
GraphQLUnionType PetType = newUnionType()
.name("Pet")
.possibleType(GraphQLObjectType.reference("Cat"))
.possibleType(DogType)
.typeResolver(new TypeResolver() {
@Override
public GraphQLObjectType getType(Object object) {
if (object instanceof GarfieldSchema.Cat) {
return CatType;
}
if (object instanceof GarfieldSchema.Dog) {
return DogType;
}
return null;
}
})
.build();

```

#### Data fetching

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26 changes: 25 additions & 1 deletion src/test/groovy/readme/ReadmeExamples.java
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Original file line number Diff line number Diff line change
Expand Up @@ -131,7 +131,6 @@ public GraphQLObjectType getType(Object object) {
.build();
}


void recursiveTypes() {

GraphQLObjectType person = newObject()
Expand All @@ -142,6 +141,31 @@ void recursiveTypes() {
.build();
}

void recursiveTypesSpecifically() {

GraphQLObjectType objectReference = GraphQLObjectType.reference("ObjectReference");
GraphQLInterfaceType interfaceReference = GraphQLInterfaceType.reference("InterfaceReference");
GraphQLInputObjectType inputObjectReference = GraphQLInputObjectType.reference("InputObjectReference");

GraphQLUnionType PetType = newUnionType()
.name("Pet")
.possibleType(GraphQLObjectType.reference("Cat"))
.possibleType(DogType)
.typeResolver(new TypeResolver() {
@Override
public GraphQLObjectType getType(Object object) {
if (object instanceof GarfieldSchema.Cat) {
return CatType;
}
if (object instanceof GarfieldSchema.Dog) {
return DogType;
}
return null;
}
})
.build();
}

void executionStrategies() {

ThreadPoolExecutor threadPoolExecutor = new ThreadPoolExecutor(
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