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/**
* Copyright (C) 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/db/field_parser.h"
#include "mongo/util/mongoutils/str.h"
namespace mongo {
using mongoutils::str::stream;
template<class T>
void _genFieldErrMsg(const BSONElement& elem,
const BSONField<T>& field,
const std::string expected,
std::string* errMsg)
{
if (!errMsg) return;
*errMsg = stream() << "wrong type for '" << field() << "' field, expected " << expected
<< ", found " << elem.toString();
}
template<typename T>
FieldParser::FieldState FieldParser::extract(BSONObj doc,
const BSONField<T>& field,
T* out,
std::string* errMsg)
{
BSONElement elem = doc[field.name()];
if (elem.eoo()) {
if (field.hasDefault()) {
field.getDefault().cloneTo(out);
return FIELD_DEFAULT;
}
else {
return FIELD_NONE;
}
}
if (elem.type() != Object && elem.type() != Array) {
_genFieldErrMsg(elem, field, "Object/Array", errMsg);
return FIELD_INVALID;
}
if (!out->parseBSON(elem.embeddedObject(), errMsg)) {
return FIELD_INVALID;
}
return FIELD_SET;
}
template<typename T>
FieldParser::FieldState FieldParser::extract(BSONObj doc,
const BSONField<T*>& field,
T** out,
std::string* errMsg)
{
BSONElement elem = doc[field.name()];
if (elem.eoo()) {
if (field.hasDefault()) {
std::unique_ptr<T> temp(new T);
field.getDefault()->cloneTo(temp.get());
*out = temp.release();
return FIELD_DEFAULT;
}
else {
return FIELD_NONE;
}
}
if (elem.type() != Object && elem.type() != Array) {
_genFieldErrMsg(elem, field, "Object/Array", errMsg);
return FIELD_INVALID;
}
std::unique_ptr<T> temp(new T);
if (!temp->parseBSON(elem.embeddedObject(), errMsg)) {
return FIELD_INVALID;
}
*out = temp.release();
return FIELD_SET;
}
template<typename T>
FieldParser::FieldState FieldParser::extract(BSONObj doc,
const BSONField<T>& field,
T** out,
std::string* errMsg)
{
BSONElement elem = doc[field.name()];
if (elem.eoo()) {
if (field.hasDefault()) {
*out = new T;
field.getDefault().cloneTo(*out);
return FIELD_DEFAULT;
}
else {
return FIELD_NONE;
}
}
if (elem.type() != Object && elem.type() != Array) {
if (errMsg) {
*errMsg = stream() << "wrong type for '" << field() << "' field, expected "
<< "vector or array" << ", found "
<< doc[field.name()].toString();
}
return FIELD_INVALID;
}
std::unique_ptr<T> temp(new T);
if (!temp->parseBSON(elem.embeddedObject(), errMsg)) {
return FIELD_INVALID;
}
*out = temp.release();
return FIELD_SET;
}
// Extracts an array into a vector
template<typename T>
FieldParser::FieldState FieldParser::extract( BSONObj doc,
const BSONField<std::vector<T> >& field,
std::vector<T>* out,
std::string* errMsg ) {
return extract( doc[field.name()], field, out, errMsg );
}
template<typename T>
FieldParser::FieldState FieldParser::extract( BSONElement elem,
const BSONField<std::vector<T> >& field,
std::vector<T>* out,
std::string* errMsg )
{
if (elem.eoo()) {
if (field.hasDefault()) {
*out = field.getDefault();
return FIELD_DEFAULT;
}
else {
return FIELD_NONE;
}
}
if (elem.type() == Array) {
BSONArray arr = BSONArray(elem.embeddedObject());
std::string elErrMsg;
// Append all the new elements to the end of the vector
size_t initialSize = out->size();
out->resize(initialSize + arr.nFields());
int i = 0;
BSONObjIterator objIt(arr);
while (objIt.more()) {
BSONElement next = objIt.next();
BSONField<T> fieldFor(next.fieldName(), out->at(initialSize + i));
if (!FieldParser::extract(next,
fieldFor,
&out->at(initialSize + i),
&elErrMsg))
{
if (errMsg) {
*errMsg = stream() << "error parsing element " << i << " of field "
<< field() << causedBy(elErrMsg);
}
return FIELD_INVALID;
}
i++;
}
return FIELD_SET;
}
if (errMsg) {
*errMsg = stream() << "wrong type for '" << field() << "' field, expected "
<< "vector array" << ", found " << elem.toString();
}
return FIELD_INVALID;
}
template<typename T>
FieldParser::FieldState FieldParser::extract(BSONObj doc,
const BSONField<std::vector<T*> >& field,
std::vector<T*>* out,
std::string* errMsg) {
dassert(!field.hasDefault());
BSONElement elem = doc[field.name()];
if (elem.eoo()) {
return FIELD_NONE;
}
return extract(elem, field, out, errMsg);
}
template<typename T>
FieldParser::FieldState FieldParser::extract(BSONElement elem,
const BSONField<std::vector<T*> >& field,
std::vector<T*>* out,
std::string* errMsg) {
if (elem.type() != Array) {
if (errMsg) {
*errMsg = stream() << "wrong type for '" << field() << "' field, expected "
<< "vector array" << ", found " << elem.toString();
}
return FIELD_INVALID;
}
BSONArray arr = BSONArray(elem.embeddedObject());
BSONObjIterator objIt(arr);
while (objIt.more()) {
BSONElement next = objIt.next();
if (next.type() != Object) {
if (errMsg) {
*errMsg = stream() << "wrong type for '" << field() << "' field contents, "
<< "expected object, found " << elem.type();
}
return FIELD_INVALID;
}
std::unique_ptr<T> toInsert(new T);
if ( !toInsert->parseBSON( next.embeddedObject(), errMsg )
|| !toInsert->isValid( errMsg ) ) {
return FIELD_INVALID;
}
out->push_back(toInsert.release());
}
return FIELD_SET;
}
template<typename T>
void FieldParser::clearOwnedVector(std::vector<T*>* vec) {
for (typename std::vector<T*>::iterator it = vec->begin(); it != vec->end(); ++it) {
delete (*it);
}
}
template<typename T>
FieldParser::FieldState FieldParser::extract(BSONObj doc,
const BSONField<std::vector<T*> >& field,
std::vector<T*>** out,
std::string* errMsg) {
dassert(!field.hasDefault());
BSONElement elem = doc[field.name()];
if (elem.eoo()) {
return FIELD_NONE;
}
if (elem.type() != Array) {
if (errMsg) {
*errMsg = stream() << "wrong type for '" << field() << "' field, expected "
<< "vector array" << ", found " << doc[field.name()].toString();
}
return FIELD_INVALID;
}
std::unique_ptr<std::vector<T*> > tempVector(new std::vector<T*>);
BSONArray arr = BSONArray(elem.embeddedObject());
BSONObjIterator objIt(arr);
while (objIt.more()) {
BSONElement next = objIt.next();
if (next.type() != Object) {
if (errMsg) {
*errMsg = stream() << "wrong type for '" << field() << "' field contents, "
<< "expected object, found " << elem.type();
}
clearOwnedVector(tempVector.get());
return FIELD_INVALID;
}
std::unique_ptr<T> toInsert(new T);
if (!toInsert->parseBSON(next.embeddedObject(), errMsg)) {
clearOwnedVector(tempVector.get());
return FIELD_INVALID;
}
tempVector->push_back(toInsert.release());
}
*out = tempVector.release();
return FIELD_SET;
}
// Extracts an object into a map
template<typename K, typename T>
FieldParser::FieldState FieldParser::extract( BSONObj doc,
const BSONField<std::map<K, T> >& field,
std::map<K, T>* out,
std::string* errMsg ) {
return extract( doc[field.name()], field, out, errMsg );
}
template<typename K, typename T>
FieldParser::FieldState FieldParser::extract( BSONElement elem,
const BSONField<std::map<K, T> >& field,
std::map<K, T>* out,
std::string* errMsg )
{
if (elem.eoo()) {
if (field.hasDefault()) {
*out = field.getDefault();
return FIELD_DEFAULT;
}
else {
return FIELD_NONE;
}
}
if (elem.type() == Object) {
BSONObj obj = elem.embeddedObject();
std::string elErrMsg;
BSONObjIterator objIt(obj);
while (objIt.more()) {
BSONElement next = objIt.next();
T& value = (*out)[next.fieldName()];
BSONField<T> fieldFor(next.fieldName(), value);
if (!FieldParser::extract(next, fieldFor, &value, &elErrMsg)) {
if (errMsg) {
*errMsg = stream() << "error parsing map element " << next.fieldName()
<< " of field " << field() << causedBy(elErrMsg);
}
return FIELD_INVALID;
}
}
return FIELD_SET;
}
if (errMsg) {
*errMsg = stream() << "wrong type for '" << field() << "' field, expected "
<< "vector array" << ", found " << elem.toString();
}
return FIELD_INVALID;
}
} // namespace mongo
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