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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 TOOLS_JSON_SCHEMA_COMPILER_UTIL_H__
#define TOOLS_JSON_SCHEMA_COMPILER_UTIL_H__
#include <string>
#include <vector>
#include "base/memory/linked_ptr.h"
#include "base/memory/scoped_ptr.h"
#include "base/values.h"
namespace json_schema_compiler {
namespace any {
class Any;
}
namespace util {
// Creates a new item at |out| from |from|[|index|]. These are used by template
// specializations of |Get(Optional)ArrayFromList|.
bool GetItemFromList(const ListValue& from, int index, int* out);
bool GetItemFromList(const ListValue& from, int index, bool* out);
bool GetItemFromList(const ListValue& from, int index, double* out);
bool GetItemFromList(const ListValue& from, int index, std::string* out);
bool GetItemFromList(const ListValue& from, int index,
linked_ptr<base::DictionaryValue>* out);
bool GetItemFromList(const ListValue& from, int index,
linked_ptr<any::Any>* out);
// This template is used for types generated by tools/json_schema_compiler.
template<class T>
bool GetItemFromList(const ListValue& from, int index, linked_ptr<T>* out) {
DictionaryValue* dict;
if (!from.GetDictionary(index, &dict))
return false;
scoped_ptr<T> obj(new T());
if (!T::Populate(*dict, obj.get()))
return false;
*out = linked_ptr<T>(obj.release());
return true;
}
// Populates |out| with |list|. Returns false if there is no list at the
// specified key or if the list has anything other than |T|.
template <class T>
bool PopulateArrayFromList(
const base::ListValue& list, std::vector<T>* out) {
out->clear();
T value;
for (size_t i = 0; i < list.GetSize(); ++i) {
if (!GetItemFromList(list, i, &value))
return false;
out->push_back(value);
}
return true;
}
// Populates |out| with |from|.|name|. Returns false if there is no list at
// the specified key or if the list has anything other than |T|.
template <class T>
bool PopulateArrayFromDictionary(
const base::DictionaryValue& from,
const std::string& name,
std::vector<T>* out) {
const base::ListValue* list = NULL;
if (!from.GetListWithoutPathExpansion(name, &list))
return false;
return PopulateArrayFromList(*list, out);
}
// Creates a new vector containing |list| at |out|. Returns
// true on success or if there is nothing at the specified key. Returns false
// if anything other than a list of |T| is at the specified key.
template <class T>
bool PopulateOptionalArrayFromList(
const base::ListValue& list,
scoped_ptr<std::vector<T> >* out) {
out->reset(new std::vector<T>());
T value;
for (size_t i = 0; i < list.GetSize(); ++i) {
if (!GetItemFromList(list, i, &value)) {
out->reset();
return false;
}
(*out)->push_back(value);
}
return true;
}
// Creates a new vector containing |from|.|name| at |out|. Returns
// true on success or if there is nothing at the specified key. Returns false
// if anything other than a list of |T| is at the specified key.
template <class T>
bool PopulateOptionalArrayFromDictionary(
const base::DictionaryValue& from,
const std::string& name,
scoped_ptr<std::vector<T> >* out) {
const base::ListValue* list = NULL;
{
const base::Value* maybe_list = NULL;
// Since |name| is optional, its absence is acceptable. However, anything
// other than a ListValue is not.
if (!from.GetWithoutPathExpansion(name, &maybe_list))
return true;
if (!maybe_list->IsType(base::Value::TYPE_LIST))
return false;
list = static_cast<const base::ListValue*>(maybe_list);
}
return PopulateOptionalArrayFromList(*list, out);
}
// Appends a Value newly created from |from| to |out|. These used by template
// specializations of |Set(Optional)ArrayToList|.
void AddItemToList(const int from, base::ListValue* out);
void AddItemToList(const bool from, base::ListValue* out);
void AddItemToList(const double from, base::ListValue* out);
void AddItemToList(const std::string& from, base::ListValue* out);
void AddItemToList(const linked_ptr<base::DictionaryValue>& from,
base::ListValue* out);
void AddItemToList(const linked_ptr<any::Any>& from,
base::ListValue* out);
// This template is used for types generated by tools/json_schema_compiler.
template<class T>
void AddItemToList(const linked_ptr<T>& from, ListValue* out) {
out->Append(from->ToValue().release());
}
// Set |out| to the the contents of |from|. Requires GetItemFromList to be
// implemented for |T|.
template <class T>
void PopulateListFromArray(
const std::vector<T>& from,
base::ListValue* out) {
out->Clear();
for (typename std::vector<T>::const_iterator it = from.begin();
it != from.end(); ++it) {
AddItemToList(*it, out);
}
}
// Set |out| to the the contents of |from| if |from| is non-NULL. Requires
// GetItemFromList to be implemented for |T|.
template <class T>
void PopulateListFromOptionalArray(
const scoped_ptr<std::vector<T> >& from,
base::ListValue* out) {
if (from.get())
PopulateListFromArray(*from, out);
}
template <class T>
scoped_ptr<Value> CreateValueFromArray(
const std::vector<T>& from) {
base::ListValue* list = new base::ListValue();
PopulateListFromArray(from, list);
return scoped_ptr<Value>(list);
}
template <class T>
scoped_ptr<Value> CreateValueFromOptionalArray(
const scoped_ptr<std::vector<T> >& from) {
if (from.get())
return CreateValueFromArray(*from);
return scoped_ptr<Value>();
}
} // namespace util
} // namespace json_schema_compiler
#endif // TOOLS_JSON_SCHEMA_COMPILER_UTIL_H__
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