src/main/java/com/authlete/jaxrs/AuthleteApiCaller.java
private StandardIntrospectionResponse callStandardIntrospection(String parameters)
    {
        if (parameters == null)
        {
            // Authlete returns different error codes for null and an empty string.
            // 'null' is regarded as a caller's error. An empty string is regarded
            // as a client application's error.
            parameters = "";
        }

        // Create a request for Authlete's /api/auth/introspection/standard API.
        StandardIntrospectionRequest request = new StandardIntrospectionRequest()
            .setParameters(parameters);

        try
        {
            // Call Authlete's /api/auth/introspection/standard API.
            return mApi.standardIntrospection(request);
        }
        catch (AuthleteApiException e)
        {
            // The API call failed.
            throw apiFailure("/api/auth/introspection/standard", e);
        }
    }
private StandardIntrospectionResponse callStandardIntrospection(String parameters)
    {
        if (parameters == null)
        {
            // Authlete returns different error codes for null and an empty string.
            // 'null' is regarded as a caller's error. An empty string is regarded
            // as a client application's error.
            parameters = "";
        }

        // Create a request for Authlete's /api/auth/introspection/standard API.
        StandardIntrospectionRequest request = new StandardIntrospectionRequest()
            .setParameters(parameters);

        try
        {
            // Call Authlete's /api/auth/introspection/standard API.
            return mApi.standardIntrospection(request);
        }
        catch (AuthleteApiException e)
        {
            // The API call failed.
            throw apiFailure("/api/auth/introspection/standard", e);
        }
    }
Call Authlete's {@code /api/auth/introspection/standard} API.