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ObjectTypeFactory.cs
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ObjectTypeFactory.cs
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using System;
using System.Collections.Generic;
using System.Reflection;
using HotChocolate.Configuration;
using HotChocolate.Language;
#nullable enable
namespace HotChocolate.Types.Factories
{
internal sealed class ObjectTypeFactory
: ITypeFactory<ObjectTypeDefinitionNode, ObjectType>
{
public ObjectType Create(
IBindingLookup bindingLookup,
ObjectTypeDefinitionNode node)
{
if (bindingLookup is null)
{
throw new ArgumentNullException(nameof(bindingLookup));
}
if (node is null)
{
throw new ArgumentNullException(nameof(node));
}
ITypeBindingInfo bindingInfo =
bindingLookup.GetBindingInfo(node.Name.Value);
return new ObjectType(d =>
{
d.SyntaxNode(node)
.Name(node.Name.Value)
.Description(node.Description?.Value);
if (bindingInfo.SourceType != null)
{
d.Extend().OnBeforeCreate(t => t.RuntimeType = bindingInfo.SourceType);
}
foreach (DirectiveNode directive in node.Directives)
{
d.Directive(directive);
}
DeclareInterfaces(d, node.Interfaces);
DeclareFields(bindingInfo, d, node.Fields);
});
}
private static void DeclareInterfaces(
IObjectTypeDescriptor typeDescriptor,
IReadOnlyCollection<NamedTypeNode> interfaceReferences)
{
foreach (NamedTypeNode typeNode in interfaceReferences)
{
typeDescriptor.Interface(typeNode);
}
}
private static void DeclareFields(
ITypeBindingInfo bindingInfo,
IObjectTypeDescriptor typeDescriptor,
IReadOnlyCollection<FieldDefinitionNode> fieldDefinitions)
{
foreach (FieldDefinitionNode fieldDefinition in fieldDefinitions)
{
bindingInfo.TrackField(fieldDefinition.Name.Value);
IObjectFieldDescriptor fieldDescriptor = typeDescriptor
.Field(fieldDefinition.Name.Value)
.Description(fieldDefinition.Description?.Value)
.Type(fieldDefinition.Type)
.SyntaxNode(fieldDefinition);
if (bindingInfo.TryGetFieldMember(
fieldDefinition.Name.Value,
MemberKind.ObjectField,
out MemberInfo member))
{
fieldDescriptor.Extend().OnBeforeCreate(
t => t.Member = member);
}
foreach (DirectiveNode directive in fieldDefinition.Directives)
{
if (!directive.IsDeprecationReason())
{
fieldDescriptor.Directive(directive);
}
}
string deprecationReason = fieldDefinition.DeprecationReason();
if (!string.IsNullOrEmpty(deprecationReason))
{
fieldDescriptor.Deprecated(deprecationReason);
}
DeclareFieldArguments(fieldDescriptor, fieldDefinition);
}
}
private static void DeclareFieldArguments(
IObjectFieldDescriptor fieldDescriptor,
FieldDefinitionNode fieldDefinition)
{
foreach (InputValueDefinitionNode inputFieldDefinition in
fieldDefinition.Arguments)
{
fieldDescriptor.Argument(inputFieldDefinition.Name.Value,
a =>
{
IArgumentDescriptor descriptor = a
.Description(inputFieldDefinition.Description?.Value)
.Type(inputFieldDefinition.Type)
.DefaultValue(inputFieldDefinition.DefaultValue)
.SyntaxNode(inputFieldDefinition);
foreach (DirectiveNode directive in
inputFieldDefinition.Directives)
{
descriptor.Directive(directive);
}
});
}
}
}
}