415 lines
12 KiB
C++
415 lines
12 KiB
C++
/*
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----
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This file is part of SECONDO.
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Copyright (C) 2012, University in Hagen
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Faculty of Mathematic 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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#include "MPointer.h"
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#include "Mem.h"
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#include "../Relation-C++/RelationAlgebra.h"
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#include "../FText/FTextAlgebra.h"
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#include "Stream.h"
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#include "../MainMemory2/MainMemoryExt.h"
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#include "MPointer.h"
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#include "Mem.h"
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#include "MemoryObject.h"
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#include "MemCatalog.h"
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#include <string>
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#include <Utils.h>
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using namespace std;
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//------------------------------------------------------------------
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namespace pgraph
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{
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int debugLevel = 0;
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// The default loglevel - the first step in the typemapping functions
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// will be quiet until the point where the log option is processed.
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// this makes it perhaps necesssary to adjust the default value here.
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void setDebugLevel(int level) { debugLevel=level; }
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//------------------------------------------------------------------
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string getDBname()
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{
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SecondoSystem *sys = SecondoSystem::GetInstance();
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return sys->GetDatabaseName();
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}
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//--------------------------------------------------------------------------
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bool DefSave(OutObject outfunc, SmiRecord &valueRecord,
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size_t &offset, const ListExpr typeInfo,
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Word &value)
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{
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ListExpr valueList;
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string valueString;
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int valueLength;
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valueList = outfunc(nl->First(typeInfo), value);
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valueList = nl->OneElemList(valueList);
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nl->WriteToString(valueString, valueList);
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valueLength = valueString.length();
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valueRecord.Write(&valueLength, sizeof(valueLength), offset);
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offset += sizeof(valueLength);
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valueRecord.Write(valueString.data(), valueString.length(), offset);
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offset += valueString.length();
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nl->Destroy(valueList);
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return (true);
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}
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//--------------------------------------------------------------------------
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bool DefOpen(InObject infunc, SmiRecord &valueRecord,
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size_t &offset, const ListExpr typeInfo,
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Word &value)
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{
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ListExpr valueList = 0;
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string valueString;
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int valueLength;
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ListExpr errorInfo = nl->OneElemList(nl->SymbolAtom("ERRORS"));
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bool correct;
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valueRecord.Read(&valueLength, sizeof(valueLength), offset);
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offset += sizeof(valueLength);
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char *buffer = new char[valueLength];
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valueRecord.Read(buffer, valueLength, offset);
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offset += valueLength;
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valueString.assign(buffer, valueLength);
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delete[] buffer;
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nl->ReadFromString(valueString, valueList);
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value = infunc(nl->First(typeInfo),
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nl->First(valueList),
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1, errorInfo, correct);
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if (errorInfo != 0)
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{
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nl->Destroy(errorInfo);
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}
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nl->Destroy(valueList);
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return (true);
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}
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//----------------------------------------------------------------------------
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void ReplaceStringInPlace(std::string& subject, const std::string& search,
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const std::string& replace) {
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size_t pos = 0;
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while ((pos = subject.find(search, pos)) != std::string::npos) {
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subject.replace(pos, search.length(), replace);
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pos += replace.length();
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}
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}
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//----------------------------------------------------------------------------
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ListExpr GetTupleDefFromObject(string name)
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{
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return nl->Empty();
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}
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//----------------------------------------------------------------------------
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// distance to the next non-atom entry
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// -1: not sub list found
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int GetNextListIndex(ListExpr list)
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{
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// find node (list type)
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int max=nl->ListLength(list);
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int i=1;
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while (i<=max)
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{
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ListExpr item=nl->Nth(i,list);
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if (!nl->IsAtom(item))
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return i-1;
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i++;
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}
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return -1;
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}
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//----------------------------------------------------------------------------
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bool FirstUpper(const string& word)
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{
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return word.size() && std::isupper(word[0]);
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}
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//-----------------------------------------------------------------------------
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ListExpr ParseString(string s)
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{
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ListExpr list = 0;
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nl->ReadFromString(s,list);
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return list;
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}
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//-----------------------------------------------------------------------------
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string GetArgValue(ListExpr args, int pos)
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{
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NList list(args);
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return list.elem(pos).second().str();
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//return nl->Text2String(nl->Second(nl->Nth(pos, args)));
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// above failed as it will not respect different string types
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}
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//-----------------------------------------------------------------------------
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ListExpr GetArg_FTEXT_AS_LIST(Address a)
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{
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FText *text = static_cast<FText*>( a);
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ListExpr list = 0;
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nl->ReadFromString(text->GetValue(), list);
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return list;
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}
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//-----------------------------------------------------------------------------
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string GetArg_FTEXT_AS_STRING(Address a)
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{
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if (a==NULL) return "";
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FText *text = static_cast<FText*>( a);
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if (text==NULL) return "";
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return text->GetValue();
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}
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//-----------------------------------------------------------------------------
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string GetArg_STRING(Address a)
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{
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if (a==NULL) return "";
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CcString *text = static_cast<CcString*>( a);
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if (text==NULL) return "";
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return text->GetValue();
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}
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//-----------------------------------------------------------------------------
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int GetArgCount(ListExpr args)
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{
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return nl->ListLength(args);
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}
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//-----------------------------------------------------------------------------
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void CheckArgCount(ListExpr args, int min, int max)
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{
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if ( nl->ListLength(args)<min || nl->ListLength(args)>max )
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{
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if (min==max)
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throw PGraphException("Expecting "+ to_string(min)+" arguments ");
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else
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throw PGraphException("Expecting "+ to_string(min)+"-"+
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to_string(max)+" arguments ");
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}
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}
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//-----------------------------------------------------------------------------
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void CheckArgType(ListExpr args, int pos, string typename_)
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{
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if ( nl->ToString(nl->First(nl->Nth(pos,args))) != typename_ )
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throw PGraphException("Argument #"+to_string(pos)+" has to be of type "+
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typename_);
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}
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//-----------------------------------------------------------------------------
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void CheckArgTypeIsTupleStream(ListExpr args, int pos)
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{
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if (!Stream<Tuple>::checkType( nl->First(nl->Nth(pos,args)) ))
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throw PGraphException("Argument #"+to_string(pos)+
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" has to be a tuple stream");
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}
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//-----------------------------------------------------------------------------
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int QueryRelationCount(string relname)
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{
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string querystring = "(count (feed " + relname + "))";
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Word resultWord;
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int i=-1;
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if ( QueryProcessor::ExecuteQuery(querystring, resultWord) )
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{
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i=((CcInt*)resultWord.addr)->GetIntval();
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cout << " count: "<< i<< "\n";
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((CcInt*)resultWord.addr)->DeleteIfAllowed();
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}
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else
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throw PGraphException("Error in executing query: "+querystring);
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return i;
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}
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//-----------------------------------------------------------------------------
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//
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bool queryValueDouble(string cmd, double &val){
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Word res;
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bool success = QueryProcessor::ExecuteQuery(cmd,res);
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if(!success){
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return false;
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}
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CcReal* s = (CcReal*) res.addr;
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if(!s->IsDefined()){
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s->DeleteIfAllowed();
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return false;
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}
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val = s->GetValue();
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s->DeleteIfAllowed();
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return true;
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}
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//-----------------------------------------------------------------------------
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double round(double x, int n) {
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int d = 0;
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if((x * pow(10, n + 1)) - (floor(x * pow(10, n))) > 4) d = 1;
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x = (floor(x * pow(10, n)) + d) / pow(10, n);
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return x;
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}
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//-----------------------------------------------------------------------------
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mm2algebra::MemoryRelObject* QueryMemRelation(string relname)
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{
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mm2algebra::MemCatalog *memCatalog =
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mm2algebra::MemCatalog::getInstance();
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if (memCatalog->isObject(relname)) {
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mm2algebra::MemoryObject *mo=memCatalog->getMMObject(relname);
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//string s=mo->getObjectTypeExpr();
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return (mm2algebra::MemoryRelObject*) mo;
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}
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throw PGraphException("Error reading relation : "+relname);
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}
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//-----------------------------------------------------------------------------
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Relation* OpenRelation(string relname)
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{
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ListExpr s;
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return OpenRelation(relname, s);
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}
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//-----------------------------------------------------------------------------
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Relation* OpenRelation(string relname, ListExpr &reltype)
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{
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SecondoCatalog* catalog = SecondoSystem::GetCatalog();
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reltype=catalog->GetObjectTypeExpr(relname);
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if (catalog->IsObjectName(relname)) {
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bool defined;
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Word word;
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catalog->GetObject(relname, word, defined);
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return (Relation*) word.addr;
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}
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throw PGraphException("Error reading relation : "+relname);
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}
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//-----------------------------------------------------------------------------
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Relation* ExecuteQuery(string query)
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{
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Word resultWord;
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Word queryResult;
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std::string typeString = "";
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std::string errorString = "";
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bool correct;
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bool evaluable;
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bool defined;
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bool isFunction;
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ListExpr q;
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nl->ReadFromString(query,q);
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if (qp->ExecuteQuery(q, queryResult,
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typeString, errorString, correct,
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evaluable, defined, isFunction))
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{
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//nl->ReadFromString(typeString, reltype);
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return ( Relation* ) queryResult.addr;
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}
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throw PGraphException("Error executing query : "+query);
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}
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//-----------------------------------------------------------------------------
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//TODO move to utils
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void DoLet(string objName, string commandText)
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// see QueryProcessor/SecondointerfaceTTY.cpp
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{
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ListExpr valueExpr = nl->TheEmptyList();
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if ( !nl->ReadFromString( commandText, valueExpr ) )
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throw PGraphException("[DoLet] Parsing commandtext");
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QueryProcessor& qp = *SecondoSystem::GetQueryProcessor();
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SecondoCatalog& ctlg = *SecondoSystem::GetCatalog();
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NestedList& nl = *SecondoSystem::GetNestedList();
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bool correct = false;
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bool evaluable = false;
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bool defined = false;
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bool isFunction = false;
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ListExpr resultType = nl.TheEmptyList();
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OpTree tree = 0;
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Word result = SetWord( Address(0) );
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try {
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qp.Construct( valueExpr, correct, evaluable, defined,
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isFunction, tree, resultType );
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if ( evaluable || isFunction )
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{
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//cout << "DoLet eval or function\n";
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string typeName = "";
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ctlg.CreateObject(objName, typeName, resultType, 0);
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}
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if ( evaluable )
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{
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qp.EvalP( tree, result, 1 );
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if( IsRootObject( tree ) && !IsConstantObject( tree ) )
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{
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//cout << "DoLet root\n";
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ctlg.CloneObject( objName, result );
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qp.Destroy( tree, true );
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}
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else
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{
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//cout << "DoLet nonroot\n";
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ctlg.UpdateObject( objName, result );
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qp.Destroy( tree, false );
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}
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}
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else if ( isFunction ) // abstraction or function object
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{
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//cout << "DoLet isfunction\n";
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if ( nl.IsAtom( valueExpr ) ) // function object
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{
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ListExpr functionList = ctlg.GetObjectValue(
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nl.SymbolValue( valueExpr ) );
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ctlg.UpdateObject( objName, SetWord( functionList ) );
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}
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else
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{
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ctlg.UpdateObject( objName, SetWord( valueExpr ) );
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}
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qp.Destroy( tree, true );
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}
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//cout << "DoLet x\n";
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} catch (SI_Error err) {
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// errorCode = err;
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throw PGraphException("SI_Error DoLet");
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qp.Destroy( tree, true );
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}
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}
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} // namespace pgraph
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