public ExecuteVisitor(INativeHelper helper, JQLCallback callback)
{
_helper = helper;
_callback = callback;
_e = new ExceptionHelper(helper);
}
public void Execute(EJDB2Handle db, EJDB2Handle jql, long skip, long limit,
JQLCallback cb, StringWriter explain)
{
if (db.IsInvalid)
{
throw new ArgumentException("Invalid DB handle.");
}
if (db.IsClosed)
{
throw new ArgumentException("DB handle is closed.");
}
if (jql.IsInvalid)
{
throw new ArgumentException("Invalid JQL handle.");
}
if (jql.IsClosed)
{
throw new ArgumentException("JQL handle is closed.");
}
IntPtr log = IntPtr.Zero;
try
{
if (explain != null)
{
log = _helper.iwxstr_new();
if (log == IntPtr.Zero)
{
throw new InvalidOperationException("iwxstr_new failed.");
}
}
var ux = new EJDB_EXEC
{
db = db.DangerousGetHandle(),
q = jql.DangerousGetHandle(),
skip = skip > 0 ? skip : 0,
limit = limit > 0 ? limit : 0,
opaque = IntPtr.Zero,
visitor = null,
log = log,
};
if (cb != null)
{
var visitor = new ExecuteVisitor(_helper, cb);
ux.visitor = visitor.Visitor;
}
ulong rc = _helper.ejdb_exec(ref ux);
if (rc != 0)
{
throw _e.CreateException(rc);
}
if (log != IntPtr.Zero)
{
string slog = Utf8String.FromIntPtr(_helper.iwxstr_ptr(log));
explain.Write(slog);
}
}
finally
{
if (log != IntPtr.Zero)
{
_helper.iwxstr_destroy(log);
}
}
}
