1// Copyright 2014 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 CONTENT_COMMON_ANDROID_GIN_JAVA_BRIDGE_VALUE_H_
6#define CONTENT_COMMON_ANDROID_GIN_JAVA_BRIDGE_VALUE_H_
7
8#include "base/memory/scoped_ptr.h"
9#include "base/pickle.h"
10#include "base/values.h"
11#include "content/common/content_export.h"
12
13// In Java Bridge, we need to pass some kinds of values that can't
14// be put into base::Value. And since base::Value is not extensible,
15// we transfer these special values via base::BinaryValue.
16
17namespace content {
18
19class GinJavaBridgeValue {
20 public:
21  enum Type {
22    TYPE_FIRST_VALUE = 0,
23    // JavaScript 'undefined'
24    TYPE_UNDEFINED = 0,
25    // JavaScript NaN and Infinity
26    TYPE_NONFINITE,
27    // Bridge Object ID
28    TYPE_OBJECT_ID,
29    TYPE_LAST_VALUE
30  };
31
32  // Serialization
33  CONTENT_EXPORT static scoped_ptr<base::BinaryValue> CreateUndefinedValue();
34  CONTENT_EXPORT static scoped_ptr<base::BinaryValue> CreateNonFiniteValue(
35      float in_value);
36  CONTENT_EXPORT static scoped_ptr<base::BinaryValue> CreateNonFiniteValue(
37      double in_value);
38  CONTENT_EXPORT static scoped_ptr<base::BinaryValue> CreateObjectIDValue(
39      int32 in_value);
40
41  // De-serialization
42  CONTENT_EXPORT static bool ContainsGinJavaBridgeValue(
43      const base::Value* value);
44  CONTENT_EXPORT static scoped_ptr<const GinJavaBridgeValue> FromValue(
45      const base::Value* value);
46
47  CONTENT_EXPORT Type GetType() const;
48  CONTENT_EXPORT bool IsType(Type type) const;
49
50  CONTENT_EXPORT bool GetAsNonFinite(float* out_value) const;
51  CONTENT_EXPORT bool GetAsObjectID(int32* out_object_id) const;
52
53 private:
54  explicit GinJavaBridgeValue(Type type);
55  explicit GinJavaBridgeValue(const base::BinaryValue* value);
56  base::BinaryValue* SerializeToBinaryValue();
57
58  Pickle pickle_;
59
60  DISALLOW_COPY_AND_ASSIGN(GinJavaBridgeValue);
61};
62
63}  // namespace content
64
65#endif  // CONTENT_COMMON_ANDROID_GIN_JAVA_BRIDGE_VALUE_H_
66