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** Copyright (C) 2015 The Qt Company Ltd.
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** This file is part of the Qt Build Suite.
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#ifndef QBS_BUILDGRAPHNODE_H
#define QBS_BUILDGRAPHNODE_H

#include "nodeset.h"
#include <language/forward_decls.h>
#include <tools/persistentobject.h>
#include <tools/weakpointer.h>

namespace qbs {
namespace Internal {

class BuildGraphVisitor;
class TopLevelProject;

class BuildGraphNode : public virtual PersistentObject
{
    friend class NodeSet;
public:
    virtual ~BuildGraphNode();

    NodeSet parents;
    NodeSet children;
    WeakPointer<ResolvedProduct> product;

    enum BuildState
    {
        Untouched = 0,
        Buildable,
        Building,
        Built
    };

    BuildState buildState;                  // Do not serialize. Will be refreshed for every build.

    enum Type
    {
        ArtifactNodeType,
        RuleNodeType
    };

    virtual Type type() const = 0;
    virtual void accept(BuildGraphVisitor *visitor) = 0;
    virtual QString toString() const = 0;
    virtual void onChildDisconnected(BuildGraphNode *child);

protected:
    explicit BuildGraphNode();
    void acceptChildren(BuildGraphVisitor *visitor);
    void load(PersistentPool &pool);
    void store(PersistentPool &pool) const;
};

} // namespace Internal
} // namespace qbs

#endif // QBS_BUILDGRAPHNODE_H