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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef SYNC_NOTIFIER_SINGLE_OBJECT_INVALIDATION_SET_H_
#define SYNC_NOTIFIER_SINGLE_OBJECT_INVALIDATION_SET_H_
#include <set>
#include "base/memory/scoped_ptr.h"
#include "sync/base/sync_export.h"
#include "sync/internal_api/public/base/invalidation.h"
#include "sync/notifier/invalidation_util.h"
namespace base {
class ListValue;
} // namespace base
namespace syncer {
// Holds a list of invalidations that all share the same Object ID.
//
// The list is kept sorted by version to make it easier to perform common
// operations, like checking for an unknown version invalidation or fetching the
// highest invalidation with the highest version number.
class SYNC_EXPORT SingleObjectInvalidationSet {
public:
typedef std::set<Invalidation, InvalidationVersionLessThan> InvalidationsSet;
typedef InvalidationsSet::const_iterator const_iterator;
typedef InvalidationsSet::const_reverse_iterator const_reverse_iterator;
SingleObjectInvalidationSet();
~SingleObjectInvalidationSet();
void Insert(const Invalidation& invalidation);
void InsertAll(const SingleObjectInvalidationSet& other);
void Clear();
// Returns true if this list contains an unknown version.
//
// Unknown version invalidations always end up at the start of the list,
// because they have the lowest possible value in the sort ordering.
bool StartsWithUnknownVersion() const;
size_t GetSize() const;
bool IsEmpty() const;
bool operator==(const SingleObjectInvalidationSet& other) const;
const_iterator begin() const;
const_iterator end() const;
const_reverse_iterator rbegin() const;
const_reverse_iterator rend() const;
const Invalidation& back() const;
scoped_ptr<base::ListValue> ToValue() const;
bool ResetFromValue(const base::ListValue& list);
private:
InvalidationsSet invalidations_;
};
} // syncer
#endif // SYNC_NOTIFIER_SINGLE_OBJECT_INVALIDATION_SET_H_
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