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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_RENDERER_EXTENSIONS_V8_SCHEMA_REGISTRY_H_
#define CHROME_RENDERER_EXTENSIONS_V8_SCHEMA_REGISTRY_H_
#include <map>
#include <set>
#include <string>
#include "base/basictypes.h"
#include "chrome/renderer/extensions/scoped_persistent.h"
#include "v8/include/v8.h"
namespace extensions {
// A registry for the v8::Value representations of extension API schemas.
// In a way, the v8 counterpart to ExtensionAPI.
class V8SchemaRegistry {
public:
V8SchemaRegistry();
~V8SchemaRegistry();
// Returns a v8::Array with all the schemas for the APIs in |apis|.
v8::Handle<v8::Array> GetSchemas(const std::set<std::string>& apis);
// Returns a v8::Object for the schema for |api|, possibly from the cache.
v8::Handle<v8::Object> GetSchema(const std::string& api);
private:
// Gets the separate context that backs the registry, creating a new one if
// if necessary.
v8::Persistent<v8::Context> GetOrCreateContext();
// Cache of schemas.
typedef std::map<std::string, v8::Persistent<v8::Object> > SchemaCache;
SchemaCache schema_cache_;
// Single per-instance v8::Context to create v8::Values.
// Created lazily via GetOrCreateContext.
ScopedPersistent<v8::Context> context_;
DISALLOW_COPY_AND_ASSIGN(V8SchemaRegistry);
};
} // namespace extensions
#endif // CHROME_RENDERER_EXTENSIONS_V8_SCHEMA_REGISTRY_H_
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