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/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef LATINIME_DICT_TOOLKIT_ARGUMENTS_PARSER_H
#define LATINIME_DICT_TOOLKIT_ARGUMENTS_PARSER_H
#include <string>
#include <unordered_map>
#include <vector>
#include "dict_toolkit_defines.h"
#include "utils/arguments_and_options.h"
namespace latinime {
namespace dicttoolkit {
class OptionSpec {
public:
// Default constructor and assignment operator is enabled to be used with std::unordered_map.
OptionSpec() = default;
OptionSpec &operator=(const OptionSpec &) = default;
static OptionSpec keyValueOption(const std::string &valueName, const std::string &defaultValue,
const std::string &description) {
return OptionSpec(true /* needsValue */, valueName, defaultValue, description);
}
static OptionSpec switchOption(const std::string &description) {
return OptionSpec(false /* needsValue */, "" /* valueName */, "" /* defaultValue */,
description);
}
bool needsValue() const { return mNeedsValue; }
const std::string &getValueName() const { return mValueName; }
const std::string &getDefaultValue() const { return mDefaultValue; }
const std::string &getDescription() const { return mDescription; }
private:
OptionSpec(const bool needsValue, const std::string &valueName, const std::string &defaultValue,
const std::string &description)
: mNeedsValue(needsValue), mValueName(valueName), mDefaultValue(defaultValue),
mDescription(description) {}
// Whether the option have to be used with a value or just a switch.
// e.g. 'f' in "command -f /path/to/file" is mNeedsValue == true.
// 'f' in "command -f -t" is mNeedsValue == false.
bool mNeedsValue;
// Name of the value used to show usage.
std::string mValueName;
std::string mDefaultValue;
std::string mDescription;
};
class ArgumentSpec {
public:
static const size_t UNLIMITED_COUNT;
static ArgumentSpec singleArgument(const std::string &name, const std::string &description) {
return ArgumentSpec(name, 1 /* minCount */, 1 /* maxCount */, description);
}
static ArgumentSpec variableLengthArguments(const std::string &name, const size_t minCount,
const size_t maxCount, const std::string &description) {
return ArgumentSpec(name, minCount, maxCount, description);
}
const std::string &getName() const { return mName; }
size_t getMinCount() const { return mMinCount; }
size_t getMaxCount() const { return mMaxCount; }
const std::string &getDescription() const { return mDescription; }
private:
DISALLOW_DEFAULT_CONSTRUCTOR(ArgumentSpec);
ArgumentSpec(const std::string &name, const size_t minCount, const size_t maxCount,
const std::string &description)
: mName(name), mMinCount(minCount), mMaxCount(maxCount), mDescription(description) {}
const std::string mName;
const size_t mMinCount;
const size_t mMaxCount;
const std::string mDescription;
};
class ArgumentsParser {
public:
ArgumentsParser(const std::unordered_map<std::string, OptionSpec> &&optionSpecs,
const std::vector<ArgumentSpec> &&argumentSpecs)
: mOptionSpecs(std::move(optionSpecs)), mArgumentSpecs(std::move(argumentSpecs)) {}
const ArgumentsAndOptions parseArguments(const int argc, char **argv,
const bool printErrorMessage) const;
bool validateSpecs() const;
void printUsage(const std::string &commandName, const std::string &description) const;
private:
DISALLOW_DEFAULT_CONSTRUCTOR(ArgumentsParser);
DISALLOW_ASSIGNMENT_OPERATOR(ArgumentsParser);
const std::unordered_map<std::string, OptionSpec> mOptionSpecs;
const std::vector<ArgumentSpec> mArgumentSpecs;
};
} // namespace dicttoolkit
} // namespace latinime
#endif // LATINIME_DICT_TOOLKIT_ARGUMENTS_PARSER_H
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