private HashMap extractRequestParameters()

in aws-xray-agent/src/main/java/com/amazonaws/xray/agent/runtime/handlers/downstream/AWSV2Handler.java [94:128]
31 lines of code
12 McCabe index (conditional complexity)

    private HashMap<String, Object> extractRequestParameters(AwsServiceDownstreamRequestEvent requestEvent) {
        HashMap<String, Object> parameters = new HashMap<>();

        AWSOperationHandler operationHandler = getOperationHandler(requestEvent.getService(), requestEvent.getOperation());
        if (operationHandler == null) {
            return parameters;
        }

        if (operationHandler.getRequestParameters() != null) {
            operationHandler.getRequestParameters().forEach((parameterName) -> {
                Optional<Object> parameterValue = (Optional) requestEvent.getValueForField(parameterName, Object.class);
                parameterValue.ifPresent(o -> parameters.put(StringTransform.toSnakeCase(parameterName), o));
            });
        }

        if (operationHandler.getRequestDescriptors() != null) {
            operationHandler.getRequestDescriptors().forEach((key, descriptor) -> {
                if (descriptor.isMap() && descriptor.shouldGetKeys()) {
                    Optional<Map> parameterValue = (Optional<Map>) requestEvent.getValueForField(key, Map.class);
                    if (parameterValue.isPresent()) {
                        String renameTo = descriptor.getRenameTo() != null ? descriptor.getRenameTo() : key;
                        parameters.put(StringTransform.toSnakeCase(renameTo), parameterValue.get().keySet());
                    }
                } else if (descriptor.isList() && descriptor.shouldGetCount()) {
                    Optional<List> parameterValue = (Optional<List>)requestEvent.getValueForField(key, List.class);
                    if (parameterValue.isPresent()) {
                        String renameTo = descriptor.getRenameTo() != null ? descriptor.getRenameTo() : key;
                        parameters.put(StringTransform.toSnakeCase(renameTo), parameterValue.get().size());
                    }
                }
            });
        }

        return parameters;
    }