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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/bson/util/bson_extract.h"
#include "mongo/db/jsobj.h"
#include "mongo/util/str.h"
namespace mongo {
namespace {
Status bsonExtractFieldImpl(const BSONObj& object,
StringData fieldName,
BSONElement* outElement,
bool withDefault) {
BSONElement element = object.getField(fieldName);
if (!element.eoo()) {
*outElement = element;
return Status::OK();
}
if (withDefault) {
static const Status kDefaultCase(ErrorCodes::NoSuchKey,
"bsonExtractFieldImpl default case no such key error");
return kDefaultCase;
}
return Status(ErrorCodes::NoSuchKey,
str::stream() << "Missing expected field \"" << fieldName.toString() << "\"");
}
Status bsonExtractTypedFieldImpl(const BSONObj& object,
StringData fieldName,
BSONType type,
BSONElement* outElement,
bool withDefault) {
Status status = bsonExtractFieldImpl(object, fieldName, outElement, withDefault);
if (!status.isOK())
return status;
if (type != outElement->type()) {
return Status(ErrorCodes::TypeMismatch,
str::stream()
<< "\"" << fieldName << "\" had the wrong type. Expected "
<< typeName(type) << ", found " << typeName(outElement->type()));
}
return status;
}
Status bsonExtractIntegerFieldImpl(const BSONObj& object,
StringData fieldName,
long long* out,
bool withDefault) {
BSONElement element;
Status status = bsonExtractFieldImpl(object, fieldName, &element, withDefault);
if (!status.isOK())
return status;
if (!element.isNumber()) {
return Status(ErrorCodes::TypeMismatch,
str::stream()
<< "Expected field \"" << fieldName
<< "\" to have numeric type, but found " << typeName(element.type()));
}
long long result = element.safeNumberLong();
if (result != element.numberDouble()) {
return Status(ErrorCodes::BadValue,
str::stream() << "Expected field \"" << fieldName
<< "\" to have a value "
"exactly representable as a 64-bit integer, but found "
<< element);
}
*out = result;
return status;
}
Status bsonExtractDoubleFieldImpl(const BSONObj& object,
StringData fieldName,
double* out,
bool withDefault) {
BSONElement element;
Status status = bsonExtractField(object, fieldName, &element);
if (!status.isOK())
return status;
if (!element.isNumber()) {
return Status(ErrorCodes::TypeMismatch,
str::stream()
<< "Expected field \"" << fieldName
<< "\" to have numeric type, but found " << typeName(element.type()));
}
*out = element.numberDouble();
return status;
}
} // namespace
Status bsonExtractField(const BSONObj& object, StringData fieldName, BSONElement* outElement) {
return bsonExtractFieldImpl(object, fieldName, outElement, false);
}
Status bsonExtractTypedField(const BSONObj& object,
StringData fieldName,
BSONType type,
BSONElement* outElement) {
return bsonExtractTypedFieldImpl(object, fieldName, type, outElement, false);
}
Status bsonExtractBooleanField(const BSONObj& object, StringData fieldName, bool* out) {
BSONElement element;
Status status = bsonExtractTypedField(object, fieldName, Bool, &element);
if (status.isOK())
*out = element.boolean();
return status;
}
Status bsonExtractBooleanFieldWithDefault(const BSONObj& object,
StringData fieldName,
bool defaultValue,
bool* out) {
BSONElement element;
Status status = bsonExtractFieldImpl(object, fieldName, &element, true);
if (status == ErrorCodes::NoSuchKey) {
*out = defaultValue;
return Status::OK();
}
if (!status.isOK())
return status;
if (!element.isNumber() && !element.isBoolean()) {
return Status(ErrorCodes::TypeMismatch,
str::stream() << "Expected boolean or number type for field \"" << fieldName
<< "\", found " << typeName(element.type()));
}
*out = element.trueValue();
return status;
}
Status bsonExtractStringField(const BSONObj& object, StringData fieldName, std::string* out) {
BSONElement element;
Status status = bsonExtractTypedField(object, fieldName, String, &element);
if (status.isOK())
*out = element.str();
return status;
}
Status bsonExtractTimestampField(const BSONObj& object, StringData fieldName, Timestamp* out) {
BSONElement element;
Status status = bsonExtractTypedField(object, fieldName, bsonTimestamp, &element);
if (status.isOK())
*out = element.timestamp();
return status;
}
Status bsonExtractOIDField(const BSONObj& object, StringData fieldName, OID* out) {
BSONElement element;
Status status = bsonExtractTypedField(object, fieldName, jstOID, &element);
if (status.isOK())
*out = element.OID();
return status;
}
Status bsonExtractOIDFieldWithDefault(const BSONObj& object,
StringData fieldName,
const OID& defaultValue,
OID* out) {
BSONElement element;
Status status = bsonExtractTypedFieldImpl(object, fieldName, jstOID, &element, true);
if (status == ErrorCodes::NoSuchKey) {
*out = defaultValue;
return Status::OK();
}
if (status.isOK())
*out = element.OID();
return status;
}
Status bsonExtractStringFieldWithDefault(const BSONObj& object,
StringData fieldName,
StringData defaultValue,
std::string* out) {
BSONElement element;
Status status = bsonExtractTypedFieldImpl(object, fieldName, String, &element, true);
if (status == ErrorCodes::NoSuchKey) {
*out = defaultValue.toString();
return Status::OK();
}
if (status.isOK())
*out = element.str();
return status;
}
Status bsonExtractIntegerField(const BSONObj& object, StringData fieldName, long long* out) {
return bsonExtractIntegerFieldImpl(object, fieldName, out, false);
}
Status bsonExtractDoubleField(const BSONObj& object, StringData fieldName, double* out) {
return bsonExtractDoubleFieldImpl(object, fieldName, out, false);
}
Status bsonExtractDoubleFieldWithDefault(const BSONObj& object,
StringData fieldName,
double defaultValue,
double* out) {
Status status = bsonExtractDoubleFieldImpl(object, fieldName, out, true);
if (status == ErrorCodes::NoSuchKey) {
*out = defaultValue;
return Status::OK();
}
return status;
}
Status bsonExtractIntegerFieldWithDefault(const BSONObj& object,
StringData fieldName,
long long defaultValue,
long long* out) {
Status status = bsonExtractIntegerFieldImpl(object, fieldName, out, true);
if (status == ErrorCodes::NoSuchKey) {
*out = defaultValue;
return Status::OK();
}
return status;
}
Status bsonExtractIntegerFieldWithDefaultIf(const BSONObj& object,
StringData fieldName,
long long defaultValue,
std::function<bool(long long)> pred,
const std::string& predDescription,
long long* out) {
Status status = bsonExtractIntegerFieldWithDefault(object, fieldName, defaultValue, out);
if (!status.isOK()) {
return status;
}
if (!pred(*out)) {
return Status(ErrorCodes::BadValue,
str::stream() << "Invalid value in field \"" << fieldName << "\": " << *out
<< ": " << predDescription);
}
return status;
}
Status bsonExtractIntegerFieldWithDefaultIf(const BSONObj& object,
StringData fieldName,
long long defaultValue,
std::function<bool(long long)> pred,
long long* out) {
return bsonExtractIntegerFieldWithDefaultIf(
object, fieldName, defaultValue, pred, "constraint failed", out);
}
} // namespace mongo
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