blob: 4904036a1e8b14662e454343c431c7e498a35f10 [file] [log] [blame]
// Copyright 2014 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.
#include <map>
#include <string>
#include <vector>
#include "extensions/browser/extension_function_histogram_value.h"
class ExtensionFunction;
// A factory function for creating new ExtensionFunction instances.
typedef ExtensionFunction* (*ExtensionFunctionFactory)();
// Template for defining ExtensionFunctionFactory.
template <class T>
ExtensionFunction* NewExtensionFunction() {
return new T();
// Contains a list of all known extension functions and allows clients to
// create instances of them.
class ExtensionFunctionRegistry {
struct FactoryEntry {
explicit FactoryEntry();
constexpr FactoryEntry(
ExtensionFunctionFactory factory,
const char* function_name,
extensions::functions::HistogramValue histogram_value)
: factory_(factory),
histogram_value_(histogram_value) {}
ExtensionFunctionFactory factory_;
const char* function_name_;
extensions::functions::HistogramValue histogram_value_;
static ExtensionFunctionRegistry* GetInstance();
explicit ExtensionFunctionRegistry();
virtual ~ExtensionFunctionRegistry();
// Allows overriding of specific functions for testing. Functions must be
// previously registered. Returns true if successful.
bool OverrideFunctionForTesting(const std::string& name,
ExtensionFunctionFactory factory);
// Factory method for the ExtensionFunction registered as 'name'.
ExtensionFunction* NewFunction(const std::string& name);
void Register(const FactoryEntry& entry);
template <class T>
void RegisterFunction() {
Register(FactoryEntry(&NewExtensionFunction<T>, T::function_name(),
typedef std::map<std::string, FactoryEntry> FactoryMap;
FactoryMap factories_;