sw: initial SwRDFHelper

The purpose of this class is to provide access to the subset of the RDF
metadata that's interesting for core code and for internal filters.

Change-Id: Ibecba302dd839b537a36b9f7a15f012c6ea26869

3 files changed, 83 insertions, 0 deletions

diff --git a/sw/Library_sw.mk b/sw/Library_sw.mk
index 789a777746c6..f9725be77cdf 100644
--- a/sw/Library_sw.mk
+++ b/sw/Library_sw.mk
@@ -214,6 +214,7 @@ $(eval $(call gb_Library_add_exception_objects,sw,\
     sw/source/core/doc/notxtfrm \
     sw/source/core/doc/number \
     sw/source/core/doc/poolfmt \
+    sw/source/core/doc/rdfhelper \
     sw/source/core/doc/sortopt \
     sw/source/core/doc/swserv \
     sw/source/core/doc/swstylemanager \
diff --git a/sw/inc/rdfhelper.hxx b/sw/inc/rdfhelper.hxx
new file mode 100644
index 000000000000..d9787cb0e402
--- /dev/null
+++ b/sw/inc/rdfhelper.hxx
@@ -0,0 +1,31 @@
+/* -*- 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/.
+ */
+
+#ifndef INCLUDED_SW_INC_RDFHELPER_HXX
+#define INCLUDED_SW_INC_RDFHELPER_HXX
+
+#include <map>
+
+#include <rtl/ustring.hxx>
+
+#include <swdllapi.h>
+
+class SwTextNode;
+
+/// Provides access to RDF metadata on core objects.
+class SW_DLLPUBLIC SwRDFHelper
+{
+public:
+    /// Gets all (rTextNode, key, value) statements in RDF graphs of type rType.
+    static std::map<OUString, OUString> getTextNodeStatements(const OUString& rType, SwTextNode& rTextNode);
+};
+
+#endif // INCLUDED_SW_INC_RDFHELPER_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/sw/source/core/doc/rdfhelper.cxx b/sw/source/core/doc/rdfhelper.cxx
new file mode 100644
index 000000000000..f476bf7bc37e
--- /dev/null
+++ b/sw/source/core/doc/rdfhelper.cxx
@@ -0,0 +1,51 @@
+/* -*- 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/.
+ */
+
+#include <rdfhelper.hxx>
+
+#include <com/sun/star/rdf/Statement.hpp>
+#include <com/sun/star/rdf/URI.hpp>
+#include <com/sun/star/rdf/XDocumentMetadataAccess.hpp>
+
+#include <comphelper/processfactory.hxx>
+
+#include <doc.hxx>
+#include <docsh.hxx>
+#include <ndtxt.hxx>
+#include <unoparagraph.hxx>
+
+using namespace com::sun::star;
+
+std::map<OUString, OUString> SwRDFHelper::getTextNodeStatements(const OUString& rType, SwTextNode& rTextNode)
+{
+    std::map<OUString, OUString> aRet;
+
+    uno::Reference<uno::XComponentContext> xComponentContext(comphelper::getProcessComponentContext());
+    uno::Reference<rdf::XURI> xType = rdf::URI::create(xComponentContext, rType);
+    uno::Reference<rdf::XDocumentMetadataAccess> xDocumentMetadataAccess(rTextNode.GetDoc()->GetDocShell()->GetBaseModel(), uno::UNO_QUERY);
+    uno::Sequence< uno::Reference<rdf::XURI> > aGraphNames = xDocumentMetadataAccess->getMetadataGraphsWithType(xType);
+    if (!aGraphNames.hasElements())
+        return aRet;
+
+    uno::Reference<rdf::XResource> xTextNode(SwXParagraph::CreateXParagraph(*rTextNode.GetDoc(), &rTextNode), uno::UNO_QUERY);
+    for (const uno::Reference<rdf::XURI>& xGraphName : aGraphNames)
+    {
+        uno::Reference<rdf::XNamedGraph> xGraph = xDocumentMetadataAccess->getRDFRepository()->getGraph(xGraphName);
+        uno::Reference<container::XEnumeration> xStatements = xGraph->getStatements(xTextNode, uno::Reference<rdf::XURI>(), uno::Reference<rdf::XURI>());
+        while (xStatements->hasMoreElements())
+        {
+            rdf::Statement aStatement = xStatements->nextElement().get<rdf::Statement>();
+            aRet[aStatement.Predicate->getStringValue()] = aStatement.Object->getStringValue();
+        }
+    }
+
+    return aRet;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */