Make server error constants be available on the GWT client

[spg]

I created a BaseUploadStatus that overrides the default (Window.alert()) behavior.

public class CustomUploadStatus extends BaseUploadStatus {
    public interface FileTooLargeHandler {
        void onFileTooLarge();
    }

    private final FileTooLargeHandler fileTooLargeHandler;

    public CustomUploadStatus(
            FileTooLargeHandler fileTooLargeHandler) {
        this.fileTooLargeHandler = fileTooLargeHandler;
    }

    @Override
    public void setError(String msg) {
        setStatus(Status.ERROR);
        if (msg.startsWith("The request was rejected because its size:")) {
            fileTooLargeHandler.onFileTooLarge();
        }
    }
}

I would like to avoid the msg.startsWith("The request was rejected because its size:"). Depending on that particular string couples me too much with the contents of UploadServlet.properties.

size_limit=The request was rejected because its size: {0} KB, exceeds the maximum: {1} KB

It seems that the UploadServlet.properties file is only available on the server. It would be nice if those messages could be available to a GWT app (maybe leveraging GWT's Messages)

Or, maybe I could use a specific Status for when the uploaded file is too large?