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 EXTENSIONS_RENDERER_V8_SCHEMA_REGISTRY_H_
6#define EXTENSIONS_RENDERER_V8_SCHEMA_REGISTRY_H_
7
8#include <map>
9#include <string>
10#include <vector>
11
12#include "base/basictypes.h"
13#include "base/memory/scoped_ptr.h"
14#include "extensions/renderer/scoped_persistent.h"
15#include "v8/include/v8-util.h"
16#include "v8/include/v8.h"
17
18namespace extensions {
19class NativeHandler;
20
21// A registry for the v8::Value representations of extension API schemas.
22// In a way, the v8 counterpart to ExtensionAPI.
23class V8SchemaRegistry {
24 public:
25  V8SchemaRegistry();
26  ~V8SchemaRegistry();
27
28  // Creates a NativeHandler wrapper |this|. Supports GetSchema.
29  scoped_ptr<NativeHandler> AsNativeHandler();
30
31  // Returns a v8::Array with all the schemas for the APIs in |apis|.
32  v8::Handle<v8::Array> GetSchemas(const std::vector<std::string>& apis);
33
34  // Returns a v8::Object for the schema for |api|, possibly from the cache.
35  v8::Handle<v8::Object> GetSchema(const std::string& api);
36
37 private:
38  // Gets the separate context that backs the registry, creating a new one if
39  // if necessary. Will also initialize schema_cache_.
40  v8::Handle<v8::Context> GetOrCreateContext(v8::Isolate* isolate);
41
42  // Cache of schemas. Created lazily by GetOrCreateContext.
43  typedef v8::StdPersistentValueMap<std::string, v8::Object> SchemaCache;
44  scoped_ptr<SchemaCache> schema_cache_;
45
46  // Single per-instance v8::Context to create v8::Values.
47  // Created lazily via GetOrCreateContext.
48  ScopedPersistent<v8::Context> context_;
49
50  DISALLOW_COPY_AND_ASSIGN(V8SchemaRegistry);
51};
52
53}  // namespace extensions
54
55#endif  // EXTENSIONS_RENDERER_V8_SCHEMA_REGISTRY_H_
56