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/* Copyright 2012 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* 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 GNU Affero General 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/mongoutils/str.h"
namespace mongo {
Status bsonExtractField(const BSONObj& object,
const StringData& fieldName,
BSONElement* outElement) {
BSONElement element = object.getField(fieldName);
if (element.eoo())
return Status(ErrorCodes::NoSuchKey,
mongoutils::str::stream() << "Missing expected field \"" <<
fieldName.toString() << "\"");
*outElement = element;
return Status::OK();
}
Status bsonExtractTypedField(const BSONObj& object,
const StringData& fieldName,
BSONType type,
BSONElement* outElement) {
Status status = bsonExtractField(object, fieldName, outElement);
if (!status.isOK())
return status;
if (type != outElement->type()) {
return Status(ErrorCodes::TypeMismatch,
mongoutils::str::stream() << "\"" << fieldName <<
"\" had the wrong type. Expected " << typeName(type) <<
", found " << typeName(outElement->type()));
}
return Status::OK();
}
Status bsonExtractBooleanField(const BSONObj& object,
const StringData& fieldName,
bool* out) {
BSONElement element;
Status status = bsonExtractTypedField(object, fieldName, Bool, &element);
if (!status.isOK())
return status;
*out = element.boolean();
return Status::OK();
}
Status bsonExtractBooleanFieldWithDefault(const BSONObj& object,
const StringData& fieldName,
bool defaultValue,
bool* out) {
BSONElement value;
Status status = bsonExtractField(object, fieldName, &value);
if (status == ErrorCodes::NoSuchKey) {
*out = defaultValue;
return Status::OK();
}
else if (!status.isOK()) {
return status;
}
else if (!value.isNumber() && !value.isBoolean()) {
return Status(ErrorCodes::TypeMismatch, mongoutils::str::stream() <<
"Expected boolean or number type for field \"" << fieldName <<
"\", found " << typeName(value.type()));
}
else {
*out = value.trueValue();
return Status::OK();
}
}
Status bsonExtractStringField(const BSONObj& object,
const StringData& fieldName,
std::string* out) {
BSONElement element;
Status status = bsonExtractTypedField(object, fieldName, String, &element);
if (!status.isOK())
return status;
*out = element.str();
return Status::OK();
}
Status bsonExtractStringFieldWithDefault(const BSONObj& object,
const StringData& fieldName,
const StringData& defaultValue,
std::string* out) {
Status status = bsonExtractStringField(object, fieldName, out);
if (status == ErrorCodes::NoSuchKey) {
*out = defaultValue.toString();
}
else if (!status.isOK()) {
return status;
}
return Status::OK();
}
Status bsonExtractIntegerField(const BSONObj& object,
const StringData& fieldName,
long long* out) {
BSONElement value;
Status status = bsonExtractField(object, fieldName, &value);
if (!status.isOK())
return status;
if (!value.isNumber()) {
return Status(ErrorCodes::TypeMismatch, mongoutils::str::stream() <<
"Expected field \"" << fieldName <<
"\" to have numeric type, but found " << typeName(value.type()));
}
long long result = value.safeNumberLong();
if (result != value.numberDouble()) {
return Status(ErrorCodes::BadValue, mongoutils::str::stream() <<
"Expected field \"" << fieldName << "\" to have a value "
"exactly representable as a 64-bit integer, but found " <<
value);
}
*out = result;
return Status::OK();
}
Status bsonExtractIntegerFieldWithDefault(const BSONObj& object,
const StringData& fieldName,
long long defaultValue,
long long* out) {
Status status = bsonExtractIntegerField(object, fieldName, out);
if (status == ErrorCodes::NoSuchKey) {
*out = defaultValue;
status = Status::OK();
}
return status;
}
} // namespace mongo
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