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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef EXTENSIONS_RENDERER_V8_SCHEMA_REGISTRY_H_
#define EXTENSIONS_RENDERER_V8_SCHEMA_REGISTRY_H_
#include <map>
#include <memory>
#include <string>
#include <vector>
#include "gin/public/context_holder.h"
#include "v8/include/v8-forward.h"
#include "v8/include/v8-util.h"
namespace extensions {
class NativeHandler;
// A registry for the v8::Value representations of extension API schemas.
// In a way, the v8 counterpart to ExtensionAPI.
class V8SchemaRegistry {
public:
V8SchemaRegistry();
V8SchemaRegistry(const V8SchemaRegistry&) = delete;
V8SchemaRegistry& operator=(const V8SchemaRegistry&) = delete;
~V8SchemaRegistry();
// Creates a NativeHandler wrapper `this`. Supports GetSchema.
std::unique_ptr<NativeHandler> AsNativeHandler(v8::Isolate* isolate);
// Returns a v8::Array with all the schemas for the APIs in `apis`.
v8::Local<v8::Array> GetSchemas(v8::Isolate* isolate,
const std::vector<std::string>& apis);
// Returns a v8::Object for the schema for `api`, possibly from the cache.
v8::Local<v8::Object> GetSchema(v8::Isolate* isolate, const std::string& api);
private:
// Gets the separate context that backs the registry, creating a new one if
// if necessary. Will also initialize schema_cache_.
v8::Local<v8::Context> GetOrCreateContext(v8::Isolate* isolate);
// Cache of schemas. Created lazily by GetOrCreateContext.
typedef v8::StdGlobalValueMap<std::string, v8::Object> SchemaCache;
std::unique_ptr<SchemaCache> schema_cache_;
// Single per-instance gin::ContextHolder to create v8::Values.
// Created lazily via GetOrCreateContext.
std::unique_ptr<gin::ContextHolder> context_holder_;
};
} // namespace extensions
#endif // EXTENSIONS_RENDERER_V8_SCHEMA_REGISTRY_H_
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