89 lines
2.4 KiB
C++
89 lines
2.4 KiB
C++
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/*
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----
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This file is part of SECONDO.
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Copyright (C) 2020,
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Faculty of Mathematics and Computer Science,
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Database Systems for New Applications.
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SECONDO is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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SECONDO is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with SECONDO; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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----
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//[$][\$]
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//[_][\_]
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*/
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#include "tsop.h"
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using std::string;
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TsOp::TsOp()
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{
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}
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// @brief TsOp::checkTimeSeriesType checks whether the
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//ListExpr satisfies the conditions to
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// be handled as a timeseries.
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// @param timeseries Listexpression to check
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// @return error or a copy of the original input
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ListExpr TsOp::checkTimeSeriesType(ListExpr& timeseries)
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{
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string error = "Timeseries exspected";
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NList timeserie = NList(timeseries);
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NList typeList = timeserie.second().second();
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if(!OrderedRelation::checkType(timeseries)){
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return listutils::typeError(error +
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" (first argument should be a ordered "
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"relation representing a timeseries.");
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}
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if(!listutils::isTupleDescription(nl->Second(timeseries))){
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return listutils::typeError((error +
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" (Tuple description should be valid!)"));
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}
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ListExpr rest = typeList.listExpr();
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ListExpr timestamp = nl->First(rest);
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rest = nl->Rest(rest);
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if(!Instant::checkType(nl->Second(timestamp)))
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{
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return listutils::typeError("First argument of tuple"
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" should be of type INSTANT.");
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}
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while(!nl->IsEmpty(rest)){
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ListExpr current = nl->First(rest);
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rest = nl->Rest(rest);
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if (!(CcReal::checkType(nl->Second(current))
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|| CcInt::checkType(nl->Second(current))))
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{
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return listutils::typeError("All attributes but the first,"
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" should be numeric to represent a timeseries.");
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}
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}
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return timeseries;
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}
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