file_based_policy_provider.h revision 21d179b334e59e9a3bfcaed4c4430bef1bc5759d 
1// Copyright (c) 2010 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef CHROME_BROWSER_POLICY_FILE_BASED_POLICY_PROVIDER_H_
6#define CHROME_BROWSER_POLICY_FILE_BASED_POLICY_PROVIDER_H_
7#pragma once
8
9#include "base/file_path.h"
10#include "base/time.h"
11#include "chrome/browser/policy/asynchronous_policy_provider.h"
12
13namespace policy {
14
15// File based policy provider that coordinates watching and reloading policy
16// information from the configuration path. Actual logic for loading policy
17// information is handled by a delegate passed at construction time.
18class FileBasedPolicyProvider : public AsynchronousPolicyProvider {
19 public:
20
21  // Delegate interface for actual policy loading from the system.
22  class ProviderDelegate : public AsynchronousPolicyProvider::Delegate {
23   public:
24    explicit ProviderDelegate(const FilePath& config_file_path);
25    virtual ~ProviderDelegate();
26
27    // AsynchronousPolicyProvider::Delegate implementation:
28    virtual DictionaryValue* Load() = 0;
29
30    // Gets the last modification timestamp for the policy information from the
31    // filesystem. Returns base::Time() if the information is not present, in
32    // which case Load() should return an empty dictionary.
33    virtual base::Time GetLastModification() = 0;
34
35    const FilePath& config_file_path() { return config_file_path_; }
36
37   private:
38    const FilePath config_file_path_;
39
40    DISALLOW_COPY_AND_ASSIGN(ProviderDelegate);
41  };
42
43  // Assumes ownership of |delegate|.
44  FileBasedPolicyProvider(const PolicyDefinitionList* policy_list,
45                          ProviderDelegate* delegate);
46  virtual ~FileBasedPolicyProvider() {}
47
48 private:
49  DISALLOW_COPY_AND_ASSIGN(FileBasedPolicyProvider);
50};
51
52}  // namespace policy
53
54#endif  // CHROME_BROWSER_POLICY_FILE_BASED_POLICY_PROVIDER_H_
55