在 graphql-java 中检测查询类型（查询、突变、订阅）

Question

Is there a way to detect the query type query , mutation or subscription , preferably without executing the query.

For example:

ExecutionInput executionInput = ExecutionInput
    .newExecutionInput()
    .query("subscription Test{test}")
    .build();

Is it possible to detect that this is a subscription request? subscription Test{test} without executing the query?

Something like executionInput.isSubscription()

Answer 1

You can use ParseAndValidate to parse the ExecutionInput :

ParseAndValidateResult parseResult = ParseAndValidate.parse(executionInput);
        parseResult.getDocument().getDefinitionsOfType(OperationDefinition.class)
        .forEach(d->{
            System.out.println(d.getOperation());
        });

The idea is to get the list of the OperationDefinition from Document (ie query parsing result) and get its Operation type (an enum which has value QUERY , MUTATION , SUBSCRIPTION ) from OperationDefinition .

_{PS I test with graphql-java v17}