tdf#125706 and tdf#125665 writer, speed up RDF, take2

second attempt at this - modify the existing API so we cache all
queries.
This slow things down slightly from 6.9s to 7.2s

Change-Id: Idb20f90be346fb1e3d7271132337ab14b49a814b
Reviewed-on: https://gerrit.libreoffice.org/74992
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
diff --git a/sw/source/core/edit/edfcol.cxx b/sw/source/core/edit/edfcol.cxx
index 4df464e..a619649 100644
--- a/sw/source/core/edit/edfcol.cxx
+++ b/sw/source/core/edit/edfcol.cxx
@@ -1157,12 +1157,14 @@ void SwEditShell::SetClassification(const OUString& rName, SfxClassificationPoli
    }
}

// We pass xParent and xNodeSubject even though they point to the same thing because the UNO_QUERY is
// on a performance-sensitive path.
static void lcl_ApplyParagraphClassification(SwDoc* pDoc,
                                      const uno::Reference<frame::XModel>& xModel,
                                      const uno::Reference<text::XTextContent>& xParent,
                                      const css::uno::Reference<css::rdf::XResource>& xNodeSubject,
                                      std::vector<svx::ClassificationResult> aResults)
{
    css::uno::Reference<css::rdf::XResource> xNodeSubject(xParent, uno::UNO_QUERY);
    if (!xNodeSubject.is())
        return;

@@ -1279,7 +1281,7 @@ void SwEditShell::ApplyParagraphClassification(std::vector<svx::ClassificationRe

    uno::Reference<frame::XModel> xModel = pDocShell->GetBaseModel();
    uno::Reference<text::XTextContent> xParent = SwXParagraph::CreateXParagraph(*pNode->GetDoc(), pNode);
    lcl_ApplyParagraphClassification(GetDoc(), xModel, xParent, std::move(aResults));
    lcl_ApplyParagraphClassification(GetDoc(), xModel, xParent, css::uno::Reference<css::rdf::XResource>(xParent, uno::UNO_QUERY), std::move(aResults));
}

static std::vector<svx::ClassificationResult> lcl_CollectParagraphClassification(const uno::Reference<frame::XModel>& xModel, const uno::Reference<text::XTextContent>& xParagraph)
@@ -1987,7 +1989,7 @@ void SwEditShell::RestoreMetadataFieldsAndValidateParagraphSignatures()
            }

            // Update classification based on results.
            lcl_ApplyParagraphClassification(GetDoc(), xModel, xParagraph, aResults);
            lcl_ApplyParagraphClassification(GetDoc(), xModel, xParagraph, xSubject, aResults);

            // Get Signatures
            std::map<OUString, SignatureDescr> aSignatures;
diff --git a/unoxml/source/rdf/librdf_repository.cxx b/unoxml/source/rdf/librdf_repository.cxx
index c04e4a0..6268da4ff 100644
--- a/unoxml/source/rdf/librdf_repository.cxx
+++ b/unoxml/source/rdf/librdf_repository.cxx
@@ -54,6 +54,7 @@

#include <rtl/ref.hxx>
#include <rtl/strbuf.hxx>
#include <rtl/ustrbuf.hxx>
#include <rtl/ustring.hxx>
#include <osl/diagnose.h>
#include <cppuhelper/exc_hlp.hxx>
@@ -242,8 +243,14 @@ public:
        Statement const& i_rStatement);
    static std::shared_ptr<Resource> extractResource_NoLock(
        const uno::Reference< rdf::XResource > & i_xResource);
    static void extractResourceToCacheKey(
        const uno::Reference< rdf::XResource > & i_xResource,
        OUStringBuffer& rBuf);
    static std::shared_ptr<Node> extractNode_NoLock(
        const uno::Reference< rdf::XNode > & i_xNode);
    static void extractNodeToCacheKey(
        const uno::Reference< rdf::XNode > & i_xNode,
        OUStringBuffer& rBuffer);
    static Statement extractStatement_NoLock(
        const uno::Reference< rdf::XResource > & i_xSubject,
        const uno::Reference< rdf::XURI > & i_xPredicate,
@@ -360,7 +367,7 @@ public:
            const uno::Reference< rdf::XURI > & i_xName );
//        throw (uno::RuntimeException, lang::IllegalArgumentException,
//            container::NoSuchElementException, rdf::RepositoryException);
    uno::Reference< container::XEnumeration > getStatementsGraph_NoLock(
    std::vector<rdf::Statement> getStatementsGraph_NoLock(
            const uno::Reference< rdf::XResource > & i_xSubject,
            const uno::Reference< rdf::XURI > & i_xPredicate,
            const uno::Reference< rdf::XNode > & i_xObject,
@@ -523,6 +530,46 @@ librdf_GraphResult::nextElement()
}


/** result of operations that return a graph, i.e.,
    an XEnumeration of statements.
 */
class librdf_GraphResult2:
    public ::cppu::WeakImplHelper<
        container::XEnumeration>
{
public:

    librdf_GraphResult2(std::vector<rdf::Statement> statements)
        : m_vStatements(std::move(statements))
    { };

    // css::container::XEnumeration:
    virtual sal_Bool SAL_CALL hasMoreElements() override;
    virtual uno::Any SAL_CALL nextElement() override;

private:

    std::vector<rdf::Statement> m_vStatements;
    int m_nIndex = 0;
};


// css::container::XEnumeration:
sal_Bool SAL_CALL
librdf_GraphResult2::hasMoreElements()
{
    return m_nIndex < static_cast<int>(m_vStatements.size());
}

css::uno::Any SAL_CALL
librdf_GraphResult2::nextElement()
{
    if (m_nIndex >= static_cast<int>(m_vStatements.size()))
        throw container::NoSuchElementException();
    m_nIndex++;
    return uno::makeAny(m_vStatements[m_nIndex-1]);
}

/** result of tuple queries ("SELECT").
 */
class librdf_QuerySelectResult:
@@ -684,10 +731,18 @@ private:
    librdf_NamedGraph(librdf_NamedGraph const&) = delete;
    librdf_NamedGraph& operator=(librdf_NamedGraph const&) = delete;

    static OUString createCacheKey(
        const uno::Reference< rdf::XResource > & i_xSubject,
        const uno::Reference< rdf::XURI > & i_xPredicate,
        const uno::Reference< rdf::XNode > & i_xObject);

    /// weak reference: this is needed to check if m_pRep is valid
    uno::WeakReference< rdf::XRepository > const m_wRep;
    librdf_Repository *const m_pRep;
    uno::Reference< rdf::XURI > const m_xName;

    // Querying is rather slow, so cache the results.
    std::map<OUString, std::vector<rdf::Statement>> m_aStatementsCache;
};


@@ -729,6 +784,7 @@ void SAL_CALL librdf_NamedGraph::clear()
        throw lang::WrappedTargetRuntimeException( ex.Message,
                        *this, anyEx );
    }
    m_aStatementsCache.clear();
}

void SAL_CALL librdf_NamedGraph::addStatement(
@@ -741,6 +797,7 @@ void SAL_CALL librdf_NamedGraph::addStatement(
        throw rdf::RepositoryException(
            "librdf_NamedGraph::addStatement: repository is gone", *this);
    }
    m_aStatementsCache.clear();
    m_pRep->addStatementGraph_NoLock(
            i_xSubject, i_xPredicate, i_xObject, m_xName);
}
@@ -755,23 +812,46 @@ void SAL_CALL librdf_NamedGraph::removeStatements(
        throw rdf::RepositoryException(
            "librdf_NamedGraph::removeStatements: repository is gone", *this);
    }
    m_aStatementsCache.clear();
    m_pRep->removeStatementsGraph_NoLock(
            i_xSubject, i_xPredicate, i_xObject, m_xName);
}

OUString librdf_NamedGraph::createCacheKey(
    const uno::Reference< rdf::XResource > & i_xSubject,
    const uno::Reference< rdf::XURI > & i_xPredicate,
    const uno::Reference< rdf::XNode > & i_xObject)
{
    OUStringBuffer cacheKey(256);
    librdf_TypeConverter::extractResourceToCacheKey(i_xSubject, cacheKey);
    cacheKey.append("\t");
    librdf_TypeConverter::extractResourceToCacheKey(i_xPredicate, cacheKey);
    cacheKey.append("\t");
    librdf_TypeConverter::extractNodeToCacheKey(i_xObject, cacheKey);
    return cacheKey.makeStringAndClear();
}

uno::Reference< container::XEnumeration > SAL_CALL
librdf_NamedGraph::getStatements(
    const uno::Reference< rdf::XResource > & i_xSubject,
    const uno::Reference< rdf::XURI > & i_xPredicate,
    const uno::Reference< rdf::XNode > & i_xObject)
{
    OUString cacheKey = createCacheKey(i_xSubject, i_xPredicate, i_xObject);
    auto it = m_aStatementsCache.find(cacheKey);
    if (it != m_aStatementsCache.end())
        return new librdf_GraphResult2(it->second);

    uno::Reference< rdf::XRepository > xRep( m_wRep );
    if (!xRep.is()) {
        throw rdf::RepositoryException(
            "librdf_NamedGraph::getStatements: repository is gone", *this);
    }
    return m_pRep->getStatementsGraph_NoLock(
    std::vector<rdf::Statement> vStatements = m_pRep->getStatementsGraph_NoLock(
            i_xSubject, i_xPredicate, i_xObject, m_xName);

    m_aStatementsCache.emplace(cacheKey, vStatements);
    return new librdf_GraphResult2(vStatements);
}


@@ -1553,18 +1633,7 @@ librdf_Repository::getStatementRDFa(
    ::std::vector< rdf::Statement > ret;
    try
    {
        const uno::Reference<container::XEnumeration> xIter(
            getStatementsGraph_NoLock(nullptr, nullptr, nullptr, xXmlId, true) );
        OSL_ENSURE(xIter.is(), "getStatementRDFa: no result?");
        if (!xIter.is()) throw uno::RuntimeException();
        while (xIter->hasMoreElements()) {
            rdf::Statement stmt;
            if (!(xIter->nextElement() >>= stmt)) {
                OSL_FAIL("getStatementRDFa: result of wrong type?");
            } else {
                ret.push_back(stmt);
            }
        }
        ret = getStatementsGraph_NoLock(nullptr, nullptr, nullptr, xXmlId, true);
    }
    catch (const container::NoSuchElementException&)
    {
@@ -1854,7 +1923,7 @@ void librdf_Repository::removeStatementsGraph_NoLock(
    }
}

uno::Reference< container::XEnumeration >
std::vector<rdf::Statement>
librdf_Repository::getStatementsGraph_NoLock(
    const uno::Reference< rdf::XResource > & i_xSubject,
    const uno::Reference< rdf::XURI > & i_xPredicate,
@@ -1864,6 +1933,8 @@ librdf_Repository::getStatementsGraph_NoLock(
//throw (uno::RuntimeException, lang::IllegalArgumentException,
//    container::NoSuchElementException, rdf::RepositoryException)
{
    std::vector<rdf::Statement> ret;

    // N.B.: if any of subject, predicate, object is an XMetadatable, and
    // has no metadata reference, then there cannot be any node in the graph
    // representing it; in order to prevent side effect
@@ -1872,9 +1943,7 @@ librdf_Repository::getStatementsGraph_NoLock(
        isMetadatableWithoutMetadata(i_xPredicate) ||
        isMetadatableWithoutMetadata(i_xObject))
    {
        return new librdf_GraphResult(this, m_aMutex,
            std::shared_ptr<librdf_stream>(),
            std::shared_ptr<librdf_node>());
        return ret;
    }

    librdf_TypeConverter::Statement const stmt(
@@ -1916,9 +1985,38 @@ librdf_Repository::getStatementsGraph_NoLock(
            "librdf_model_find_statements_in_context failed", *this);
    }

    // librdf_model_find_statements_in_context is buggy and does not put
    // the context into result statements; pass it to librdf_GraphResult here
    return new librdf_GraphResult(this, m_aMutex, pStream, pContext);
    librdf_node *pCtxt1(
#if LIBRDF_VERSION >= 10012
        librdf_stream_get_context2(pStream.get()) );
#else
        static_cast<librdf_node *>(librdf_stream_get_context(pStream.get())) );
#endif
    while (!librdf_stream_end(pStream.get()))
    {
        auto pCtxt = pCtxt1;
        librdf_statement *pStmt( librdf_stream_get_object(pStream.get()) );
        if (!pStmt) {
            rdf::QueryException e(
                "librdf_GraphResult::nextElement: "
                "librdf_stream_get_object failed", *this);
            throw lang::WrappedTargetException(
                "librdf_GraphResult::nextElement: "
                "librdf_stream_get_object failed", *this,
                    uno::makeAny(e));
        }
        // NB: pCtxt may be null here if this is result of a graph query
        if (pCtxt && isInternalContext(pCtxt)) {
            pCtxt = nullptr; // XML ID context is implementation detail!
        }

        ret.emplace_back(
            getTypeConverter().convertToStatement(pStmt, pCtxt) );

        // NB: this will invalidate current item.
        librdf_stream_next(pStream.get());
    }

    return ret;
}

extern "C"
@@ -2031,6 +2129,21 @@ librdf_TypeConverter::extractResource_NoLock(
    }
}

void
librdf_TypeConverter::extractResourceToCacheKey(
    const uno::Reference< rdf::XResource > & i_xResource, OUStringBuffer& rBuffer)
{
    if (!i_xResource.is()) {
        return;
    }
    uno::Reference< rdf::XBlankNode > xBlankNode(i_xResource, uno::UNO_QUERY);
    if (xBlankNode.is()) {
        rBuffer.append("BlankNode ").append(xBlankNode->getStringValue());
    } else { // assumption: everything else is URI
        rBuffer.append("URI ").append(i_xResource->getStringValue());
    }
}

// create blank or URI node
librdf_node* librdf_TypeConverter::mkResource_Lock( librdf_world* i_pWorld,
    Resource const*const i_pResource)
@@ -2098,6 +2211,31 @@ librdf_TypeConverter::extractNode_NoLock(
    return std::shared_ptr<Node>(new Literal(val, lang, type));
}

// extract blank or URI or literal node - call without Mutex locked
void
librdf_TypeConverter::extractNodeToCacheKey(
    const uno::Reference< rdf::XNode > & i_xNode,
    OUStringBuffer& rBuffer)
{
    if (!i_xNode.is()) {
        return;
    }
    uno::Reference< rdf::XResource > xResource(i_xNode, uno::UNO_QUERY);
    if (xResource.is()) {
        return extractResourceToCacheKey(xResource, rBuffer);
    }
    uno::Reference< rdf::XLiteral> xLiteral(i_xNode, uno::UNO_QUERY);
    OSL_ENSURE(xLiteral.is(),
        "mkNode: someone invented a new rdf.XNode and did not tell me");
    if (!xLiteral.is()) {
        return;
    }
    rBuffer.append("Literal ").append(xLiteral->getValue()).append("\t").append(xLiteral->getLanguage());
    const uno::Reference< rdf::XURI > xType(xLiteral->getDatatype());
    if (xType.is())
        rBuffer.append("\t").append(xType->getStringValue());
}

// create blank or URI or literal node
librdf_node* librdf_TypeConverter::mkNode_Lock( librdf_world* i_pWorld,
    Node const*const i_pNode)