public ExecutionContext BuildExecutionContext(
ISchema schema,
object root,
Document document,
string operationName,
Inputs inputs,
CancellationToken cancellationToken)
{
var context = new ExecutionContext();
context.Schema = schema;
context.RootObject = root;
var operation = !string.IsNullOrWhiteSpace(operationName)
? document.Operations.WithName(operationName)
: document.Operations.FirstOrDefault();
if (operation == null)
{
context.Errors.Add(new ExecutionError("Unknown operation name: {0}".ToFormat(operationName)));
return context;
}
context.Operation = operation;
context.Variables = GetVariableValues(schema, operation.Variables, inputs);
context.Fragments = document.Fragments;
context.CancellationToken = cancellationToken;
return context;
}
public ValidationResult IsValid(Schema schema, Document document, string operationName)
{
var result = new ValidationResult();
if (string.IsNullOrWhiteSpace(operationName)
&& document.Operations.Count() > 1)
{
result.Errors.Add(new ExecutionError("Must provide operation name if query contains multiple operations"));
}
return result;
}
private Tuple<ExecutionContext, IEnumerable<ExecutionError>> BuildExecutionContext(
ISchema schema,
object root,
Document document,
string operationName,
Inputs inputs,
CancellationToken cancellationToken,
object userContext)
{
Operation operation = !string.IsNullOrWhiteSpace( operationName )
? document.Operations.WithName( operationName )
: document.Operations.FirstOrDefault();
ExecutionContext executionContext;
if (operation == null)
{
IEnumerable<ExecutionError> executionErrors = new List<ExecutionError>
{
new ExecutionError( string.Format( "Unknown operation name: {0}", operationName ) )
};
executionContext = new ExecutionContext(
schema,
root,
cancellationToken,
userContext);
return new Tuple<ExecutionContext, IEnumerable<ExecutionError>>(
executionContext,
executionErrors );
}
executionContext = new ExecutionContext(
schema,
root,
operation,
document.Fragments,
GetVariableValues(schema, operation.Variables, inputs),
cancellationToken,
userContext);
return new Tuple<ExecutionContext, IEnumerable<ExecutionError>>(
executionContext,
null );
}