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/*
* Phusion Passenger - https://www.phusionpassenger.com/
* Copyright (c) 2017 Phusion Holding B.V.
*
* "Passenger", "Phusion Passenger" and "Union Station" are registered
* trademarks of Phusion Holding B.V.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#ifndef _PASSENGER_CONFIG_KIT_TABLE_TRANSLATOR_H_
#define _PASSENGER_CONFIG_KIT_TABLE_TRANSLATOR_H_
#include <ConfigKit/Translator.h>
#include <DataStructures/StringKeyTable.h>
namespace Passenger {
namespace ConfigKit {
using namespace std;
/**
* A translator that translates keys according to a table of rules. Anything
* not in the table is simply left as-is.
*
* TableTranslator translator;
* translator.add("foo", "bar");
* translator.finalize();
*
* translator.translateOne("foo"); // => "bar"
* translator.reverseTranslateOne("bar"); // => "foo"
*
* translator.translateOne("baz"); // => "baz"
* translator.reverseTranslateOne("baz"); // => "baz"
*
* You can learn more about translators in the ConfigKit README, section
* "The special problem of overlapping configuration names and translation".
*/
class TableTranslator: public Translator {
private:
StringKeyTable<string> table, reverseTable;
bool finalized;
static string internalTranslateOne(const StringKeyTable<string> &table,
const StaticString &key)
{
const string *entry;
if (table.lookup(key, &entry)) {
return *entry;
} else {
return key;
}
}
public:
TableTranslator()
: finalized(false)
{ }
void add(const StaticString &mainSchemaKeyName, const StaticString &subSchemaKeyName) {
assert(!finalized);
table.insert(mainSchemaKeyName, subSchemaKeyName);
reverseTable.insert(subSchemaKeyName, mainSchemaKeyName);
}
void finalize() {
assert(!finalized);
table.compact();
reverseTable.compact();
finalized = true;
}
bool isFinalized() const {
return finalized;
}
virtual Json::Value translate(const Json::Value &doc) const {
assert(finalized);
return Translator::translate(doc);
}
virtual Json::Value reverseTranslate(const Json::Value &doc) const {
assert(finalized);
return Translator::reverseTranslate(doc);
}
virtual vector<Error> translate(const vector<Error> &errors) const {
assert(finalized);
return Translator::translate(errors);
}
virtual vector<Error> reverseTranslate(const vector<Error> &errors) const {
assert(finalized);
return Translator::reverseTranslate(errors);
}
virtual string translateOne(const StaticString &key) const {
assert(finalized);
return internalTranslateOne(table, key);
}
virtual string reverseTranslateOne(const StaticString &key) const {
return internalTranslateOne(reverseTable, key);
}
};
} // namespace ConfigKit
} // namespace Passenger
#endif /* _PASSENGER_CONFIG_KIT_TABLE_TRANSLATOR_H_ */
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