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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program 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
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include "mongo/platform/basic.h"
#include "mongo/db/pipeline/document_source_add_fields.h"
#include <boost/optional.hpp>
#include <boost/smart_ptr/intrusive_ptr.hpp>
#include "mongo/db/exec/add_fields_projection_executor.h"
#include "mongo/db/pipeline/lite_parsed_document_source.h"
namespace mongo {
using boost::intrusive_ptr;
REGISTER_DOCUMENT_SOURCE(addFields,
LiteParsedDocumentSourceDefault::parse,
DocumentSourceAddFields::createFromBson,
AllowedWithApiStrict::kAlways);
REGISTER_DOCUMENT_SOURCE(set,
LiteParsedDocumentSourceDefault::parse,
DocumentSourceAddFields::createFromBson,
AllowedWithApiStrict::kAlways);
intrusive_ptr<DocumentSource> DocumentSourceAddFields::create(
BSONObj addFieldsSpec,
const intrusive_ptr<ExpressionContext>& expCtx,
StringData userSpecifiedName) {
const bool isIndependentOfAnyCollection = false;
intrusive_ptr<DocumentSourceSingleDocumentTransformation> addFields(
new DocumentSourceSingleDocumentTransformation(
expCtx,
[&]() {
try {
return projection_executor::AddFieldsProjectionExecutor::create(expCtx,
addFieldsSpec);
} catch (DBException& ex) {
ex.addContext("Invalid " + userSpecifiedName.toString());
throw;
}
}(),
userSpecifiedName == kStageName ? kStageName : kAliasNameSet,
isIndependentOfAnyCollection));
return addFields;
}
intrusive_ptr<DocumentSource> DocumentSourceAddFields::create(
const FieldPath& fieldPath,
const intrusive_ptr<Expression>& expr,
const intrusive_ptr<ExpressionContext>& expCtx) {
const bool isIndependentOfAnyCollection = false;
return make_intrusive<DocumentSourceSingleDocumentTransformation>(
expCtx,
projection_executor::AddFieldsProjectionExecutor::create(expCtx, fieldPath, expr),
kStageName,
isIndependentOfAnyCollection);
}
intrusive_ptr<DocumentSource> DocumentSourceAddFields::createFromBson(
BSONElement elem, const intrusive_ptr<ExpressionContext>& expCtx) {
const auto specifiedName = elem.fieldNameStringData();
invariant(specifiedName == kStageName || specifiedName == kAliasNameSet);
uassert(40272,
str::stream() << specifiedName << " specification stage must be an object, got "
<< typeName(elem.type()),
elem.type() == Object);
return DocumentSourceAddFields::create(elem.Obj(), expCtx, specifiedName);
}
} // namespace mongo
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