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// 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.
#ifndef COMPONENTS_CLOUD_DEVICES_CAPABILITY_INTERFACES_H_
#define COMPONENTS_CLOUD_DEVICES_CAPABILITY_INTERFACES_H_
// Defines common templates that could be used to create device specific
// capabilities and print tickets.
#include <vector>
#include "base/logging.h"
#include "components/cloud_devices/cloud_device_description.h"
namespace base {
class DictionaryValue;
}
namespace cloud_devices {
// All traits below specify how to serialize and validate capabilities and
// ticket items.
// Traits should have following methods:
// // Returns true if capability semantically valid.
// static bool IsValid(const Option&);
//
// // Returns json path relative to the root of CDD/CJT.
// static std::string GetItemPath();
//
// // Loads ticket item. Returns false if failed.
// static bool Load(const base::DictionaryValue& dict, ContentType* option);
//
// // Saves ticket item.
// static void Save(ContentType option, base::DictionaryValue* dict);
// Represents a CDD capability that is stored as a JSON list
// Ex: "<CAPABILITY_NAME>": [ {<VALUE>}, {<VALUE>}, {<VALUE>} ]
// Option specifies data type for <VALUE>.
// Traits specifies how <VALUE> is stored in JSON and semantic validation.
template <class Option, class Traits>
class ListCapability {
public:
ListCapability();
~ListCapability();
bool LoadFrom(const CloudDeviceDescription& description);
void SaveTo(CloudDeviceDescription* description) const;
void Reset() {
options_.clear();
}
bool IsValid() const;
bool empty() const {
return options_.empty();
}
size_t size() const {
return options_.size();
}
const Option& operator[](size_t i) const {
return options_[i];
}
bool Contains(const Option& option) const{
return std::find(options_.begin(), options_.end(), option) !=
options_.end();
}
void AddOption(const Option& option) {
options_.push_back(option);
}
private:
typedef std::vector<Option> OptionVector;
OptionVector options_;
DISALLOW_COPY_AND_ASSIGN(ListCapability);
};
// Represents CDD capability stored as JSON list with default_value value.
// Ex: "<CAPABILITY_NAME>": { "option": [{ "is_default": true, <VALUE>},
// {<VALUE>} ]}
// Option specifies data type for <VALUE>.
// Traits specifies how <VALUE> is stored in JSON and semantic validation.
template <class Option, class Traits>
class SelectionCapability {
public:
SelectionCapability();
~SelectionCapability();
bool LoadFrom(const CloudDeviceDescription& description);
void SaveTo(CloudDeviceDescription* description) const;
void Reset() {
options_.clear();
default_idx_ = -1;
}
bool IsValid() const;
bool empty() const {
return options_.empty();
}
size_t size() const {
return options_.size();
}
const Option& operator[](size_t i) const {
return options_[i];
}
bool Contains(const Option& option) const{
return std::find(options_.begin(), options_.end(), option) !=
options_.end();
}
const Option& GetDefault() const {
CHECK_GE(default_idx_, 0);
return options_[default_idx_];
}
void AddOption(const Option& option) {
AddDefaultOption(option, false);
}
void AddDefaultOption(const Option& option, bool is_default) {
if (is_default) {
DCHECK_EQ(default_idx_, -1);
// Point to the last element.
default_idx_ = static_cast<int>(size());
}
options_.push_back(option);
}
private:
typedef std::vector<Option> OptionVector;
OptionVector options_;
int default_idx_;
DISALLOW_COPY_AND_ASSIGN(SelectionCapability);
};
// Represents CDD capability that can be true or false.
// Ex: "<CAPABILITY_NAME>": { "default_value": true }
// Traits specifies how <VALUE> is stored in JSON and semantic validation.
template <class Traits>
class BooleanCapability {
public:
BooleanCapability();
~BooleanCapability();
bool LoadFrom(const CloudDeviceDescription& description);
void SaveTo(CloudDeviceDescription* description) const;
void Reset() {
default_value_ = false;
}
void set_default_value(bool value) {
default_value_ = value;
}
bool default_value() const {
return default_value_;
}
private:
bool default_value_;
DISALLOW_COPY_AND_ASSIGN(BooleanCapability);
};
// Represents CDD capability for which existence is only important.
// Ex: "<CAPABILITY_NAME>": { }
// Traits specifies how <VALUE> is stored in JSON and semantic validation.
template <class Traits>
class EmptyCapability {
public:
EmptyCapability() {};
~EmptyCapability() {};
bool LoadFrom(const CloudDeviceDescription& description);
void SaveTo(CloudDeviceDescription* description) const;
private:
DISALLOW_COPY_AND_ASSIGN(EmptyCapability);
};
// Represents CJT items.
// Ex: "<CAPABILITY_NAME>": {<VALUE>}
// Option specifies data type for <VALUE>.
// Traits specifies how <VALUE> is stored in JSON and semantic validation.
template <class Option, class Traits>
class TicketItem {
public:
TicketItem();
~TicketItem();
bool LoadFrom(const CloudDeviceDescription& description);
void SaveTo(CloudDeviceDescription* description) const;
void Reset() {
value_ = Option();
}
bool IsValid() const;
const Option& value() const {
return value_;
}
void set_value(const Option& value) {
value_ = value;
}
private:
Option value_;
DISALLOW_COPY_AND_ASSIGN(TicketItem);
};
} // namespace cloud_devices
#endif // COMPONENTS_CLOUD_DEVICES_CAPABILITY_INTERFACES_H_
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