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/*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* SchemaParser.h
* Constructs a JsonSchema.
* Copyright (C) 2014 Simon Newton
*/
#ifndef COMMON_WEB_SCHEMAPARSER_H_
#define COMMON_WEB_SCHEMAPARSER_H_
#include <memory>
#include <stack>
#include <string>
#include "common/web/PointerTracker.h"
#include "common/web/SchemaErrorLogger.h"
#include "common/web/SchemaParseContext.h"
#include "ola/base/Macro.h"
#include "ola/web/JsonLexer.h"
#include "ola/web/JsonPointer.h"
namespace ola {
namespace web {
/**
* @brief Build the tree of validators and a SchemaDefinitions object from a
* JSON Schema.
*
* The SchemaParser is an implementation of JsonParserInterface. As the
* JsonLexer encounters each token, it calls the appropriate method on the
* SchemaParser. The SchemaParser maintains a stack of contexts, each of which
* corresponds to a different part of the JSON schema. As objects / arrays are
* opened / closed, new contexts are added / removed from the context stack.
*/
class SchemaParser : public JsonParserInterface {
public:
/**
* @brief Create a new SchemaParser.
*/
SchemaParser();
/**
* @brief Clean up
*/
~SchemaParser();
// Methods from JsonParserInterface
void Begin();
void End();
void String(const std::string &value);
void Number(uint32_t value);
void Number(int32_t value);
void Number(uint64_t value);
void Number(int64_t value);
void Number(const JsonDouble::DoubleRepresentation &rep);
void Number(double value);
void Bool(bool value);
void Null();
void OpenArray();
void CloseArray();
void OpenObject();
void ObjectKey(const std::string &key);
void CloseObject();
void SetError(const std::string &error);
/**
* @brief Check if the schema was valid.
* @return true if the schema was valid, false otherwise.
*/
bool IsValidSchema();
/**
* @brief Get the error message.
*/
std::string Error() const;
/**
* @brief Claim the RootValidator that was created by parsing the schema.
* @returns A new Validator, or NULL if the schema wasn't valid. Ownership of
* the validtor is transferred to the caller.
*/
ValidatorInterface* ClaimRootValidator();
/**
* @brief Claim the SchemaDefinitions that were created by parsing the schema.
* @returns A SchemaDefinitions object, or NULL if the schema wasn't valid.
* Ownership of the SchemaDefinitions is transferred to the caller.
*/
SchemaDefinitions* ClaimSchemaDefs();
private:
std::auto_ptr<SchemaDefinitions> m_schema_defs;
std::auto_ptr<SchemaParseContext> m_root_context;
std::auto_ptr<ValidatorInterface> m_root_validator;
std::stack<class SchemaParseContextInterface*> m_context_stack;
JsonPointer m_pointer;
PointerTracker m_pointer_tracker;
SchemaErrorLogger m_error_logger;
template <typename T>
void HandleNumber(T t);
DISALLOW_COPY_AND_ASSIGN(SchemaParser);
};
} // namespace web
} // namespace ola
#endif // COMMON_WEB_SCHEMAPARSER_H_
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