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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#ifndef INCLUDED_SC_INC_DPFILTEREDCACHE_HXX
#define INCLUDED_SC_INC_DPFILTEREDCACHE_HXX
#include <sal/types.h>
#include "dpitemdata.hxx"
#include "calcmacros.hxx"
#include <unordered_set>
#include <vector>
#include <mdds/flat_segment_tree.hpp>
class ScDPCache;
struct ScDPValue;
struct ScQueryParam;
/**
* This class is only a wrapper to the actual cache, to provide filtering on
* the raw data based on the query filter and/or page field filters.
*/
class SC_DLLPUBLIC ScDPFilteredCache
{
typedef mdds::flat_segment_tree<SCROW, bool> RowFlagType;
public:
/** interface class used for filtering of rows. */
class FilterBase
{
public:
virtual ~FilterBase() {}
/** returns true if the matching condition is met for a single cell
value, or false otherwise. */
virtual bool match( const ScDPItemData& rCellData ) const = 0;
virtual std::vector<ScDPItemData> getMatchValues() const = 0;
};
/** ordinary single-item filter. */
class SingleFilter : public FilterBase
{
public:
explicit SingleFilter(const ScDPItemData &rItem);
virtual bool match(const ScDPItemData& rCellData) const override;
virtual std::vector<ScDPItemData> getMatchValues() const override;
private:
ScDPItemData maItem;
};
/** multi-item (group) filter. */
class GroupFilter : public FilterBase
{
public:
GroupFilter();
virtual bool match(const ScDPItemData& rCellData) const override;
virtual std::vector<ScDPItemData> getMatchValues() const override;
void addMatchItem(const ScDPItemData& rItem);
size_t getMatchItemCount() const;
private:
::std::vector<ScDPItemData> maItems;
};
/** single filtering criterion. */
struct Criterion
{
sal_Int32 mnFieldIndex;
std::shared_ptr<FilterBase> mpFilter;
Criterion();
};
ScDPFilteredCache(const ScDPCache& rCache);
~ScDPFilteredCache();
sal_Int32 getRowSize() const;
sal_Int32 getColSize() const;
const ScDPCache& getCache() const { return mrCache;}
void fillTable(const ScQueryParam& rQuery, bool bIgnoreEmptyRows, bool bRepeatIfEmpty);
void fillTable();
/** Check whether a specified row is active or not. When a row is active,
it is used in calculation of the results data. A row becomes inactive
when it is filtered out by page field. */
bool isRowActive(sal_Int32 nRow, sal_Int32* pLastRow = nullptr) const;
/** Set filter on/off flag to each row to control visibility. The caller
must ensure that the table is filled before calling this function. */
void filterByPageDimension(const std::vector<Criterion>& rCriteria, const std::unordered_set<sal_Int32>& rRepeatIfEmptyDims);
/** Get the cell instance at specified location within the data grid. Note
that the data grid doesn't include the header row. Don't delete the
returned object! */
const ScDPItemData* getCell(SCCOL nCol, SCROW nRow, bool bRepeatIfEmpty) const;
void getValue( ScDPValue& rVal, SCCOL nCol, SCROW nRow) const;
OUString getFieldName(SCCOL nIndex) const;
/** Get the unique entries for a field specified by index. The caller must
make sure that the table is filled before calling function, or it will
get an empty collection. */
const ::std::vector<SCROW>& getFieldEntries( sal_Int32 nColumn ) const;
/** Filter the table based on the specified criteria, and copy the
result to rTabData. This method is used, for example, to generate
a drill-down data table. */
void filterTable(const std::vector<Criterion>& rCriteria,
css::uno::Sequence< css::uno::Sequence< css::uno::Any > >& rTabData,
const std::unordered_set<sal_Int32>& rRepeatIfEmptyDims);
void clear();
bool empty() const;
#if DUMP_PIVOT_TABLE
static void dumpRowFlag( const RowFlagType& rFlag );
void dump() const;
#endif
private:
ScDPFilteredCache(const ScDPFilteredCache&) = delete;
/**
* Check if a given row meets all specified criteria.
*
* @param nRow index of row to be tested.
* @param rCriteria a list of criteria
*/
bool isRowQualified(sal_Int32 nRow, const ::std::vector<Criterion>& rCriteria, const std::unordered_set<sal_Int32>& rRepeatIfEmptyDims) const;
private:
/** unique field entires for each field (column). */
::std::vector< ::std::vector<SCROW> > maFieldEntries;
/** Rows visible by standard filter query. */
RowFlagType maShowByFilter;
/** Rows visible by page dimension filtering. */
RowFlagType maShowByPage;
const ScDPCache& mrCache;
};
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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