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diff --git a/src/lib/buildgraph/artifact.h b/src/lib/buildgraph/artifact.h
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+/*************************************************************************
+**
+** This file is part of the Qt Build Suite
+**
+** Copyright (c) 2012 Nokia Corporation and/or its subsidiary(-ies).*
+**
+** Contact: Nokia Corporation (info@qt.nokia.com)
+**
+** GNU Lesser General Public License Usage
+** This file may be used under the terms of the GNU Lesser General Public
+** License version 2.1 as published by the Free Software Foundation and
+** appearing in the file LICENSE.LGPL included in the packaging of this file.
+** Please review the following information to ensure the GNU Lesser General
+** Public License version 2.1 requirements will be met:
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License version 3.0 as published by the Free Software Foundation
+** and appearing in the file LICENSE.GPL included in the packaging of this
+** file.
+** Please review the following information to ensure the GNU General
+** Public License version 3.0 requirements will be met:
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**************************************************************************/
+
+#ifndef ARTIFACT_H
+#define ARTIFACT_H
+
+#include "artifactlist.h"
+#include <language/language.h>
+
+#include <QtCore/QSet>
+#include <QtCore/QString>
+
+namespace qbs {
+
+class BuildProduct;
+class BuildProject;
+class Transformer;
+
+class Artifact : public PersistentObject
+{
+public:
+    Artifact(BuildProject *p = 0);
+    ~Artifact();
+
+    ArtifactList parents;
+    ArtifactList children;
+    ArtifactList fileDependencies;
+    ArtifactList sideBySideArtifacts;     /// all artifacts that have been produced by the same rule
+    QString fileName;
+    QSet<QString> fileTags;
+    BuildProject *project;
+    BuildProduct *product;          // Note: file dependency artifacts don't belong to a product.
+    QSharedPointer<Transformer> transformer;
+    Configuration::Ptr configuration;
+
+    enum ArtifactType
+    {
+        Unknown,
+        SourceFile,
+        Generated,
+        FileDependency
+    };
+    ArtifactType artifactType;
+
+    enum BuildState
+    {
+        Untouched = 0,
+        Buildable,
+        Building,
+        Built
+    };
+    BuildState buildState;
+
+    bool outOfDateCheckPerformed : 1;
+    bool isOutOfDate : 1;
+    bool isExistingFile : 1;
+
+private:
+    void load(PersistentPool &pool, PersistentObjectData &data);
+    void store(PersistentPool &pool, PersistentObjectData &data) const;
+};
+
+// debugging helper
+inline QString toString(Artifact::BuildState s)
+{
+    switch (s) {
+    case Artifact::Buildable:
+        return "Initialized";
+    case Artifact::Building:
+        return "Processing";
+    case Artifact::Built:
+        return "Finished";
+    default:
+        return "Unknown";
+    }
+}
+
+} // namespace qbs
+
+#endif // ARTIFACT_H