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// Copyright (c) 2012 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 CHROME_BROWSER_POLICY_POLICY_BUNDLE_H_
#define CHROME_BROWSER_POLICY_POLICY_BUNDLE_H_
#include <map>
#include <string>
#include <utility>
#include "base/basictypes.h"
#include "chrome/browser/policy/policy_service.h"
namespace policy {
class PolicyMap;
// Maps policy namespaces to PolicyMaps.
class PolicyBundle {
public:
// Groups a policy domain and a component ID in a single object representing
// a policy namespace. Used as the key type in MapType.
typedef std::pair<PolicyDomain, std::string> PolicyNamespace;
typedef std::map<PolicyNamespace, PolicyMap*> MapType;
typedef MapType::const_iterator const_iterator;
PolicyBundle();
virtual ~PolicyBundle();
// Returns the PolicyMap for namespace (domain, component_id).
PolicyMap& Get(PolicyDomain domain, const std::string& component_id);
const PolicyMap& Get(PolicyDomain domain,
const std::string& component_id) const;
// Swaps the internal representation of |this| with |other|.
void Swap(PolicyBundle* other);
// |this| becomes a copy of |other|. Any existing PolicyMaps are dropped.
void CopyFrom(const PolicyBundle& other);
// Merges the PolicyMaps of |this| with those of |other| for each namespace
// in common. Also adds copies of the (namespace, PolicyMap) pairs in |other|
// that don't have an entry in |this|.
// Each policy in each PolicyMap is replaced only if the policy from |other|
// has a higher priority.
// See PolicyMap::MergeFrom for details on merging individual PolicyMaps.
void MergeFrom(const PolicyBundle& other);
// Returns true if |other| has the same keys and value as |this|.
bool Equals(const PolicyBundle& other) const;
// Returns iterators to the beginning and end of the underlying container.
// These can be used to iterate over and read the PolicyMaps, but not to
// modify them.
const_iterator begin() const;
const_iterator end() const;
// Erases all the existing pairs.
void Clear();
private:
MapType policy_bundle_;
// An empty PolicyMap that is returned by const Get() for namespaces that
// do not exist in |policy_bundle_|.
const PolicyMap kEmpty_;
DISALLOW_COPY_AND_ASSIGN(PolicyBundle);
};
} // namespace policy
#endif // CHROME_BROWSER_POLICY_POLICY_BUNDLE_H_
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