/
bson_builder.h
executable file
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/
bson_builder.h
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/*
* Copyright (C) 2019 YY Inc. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef __X_BSON_BUILDER_H
#define __X_BSON_BUILDER_H
#include "xstdint.h"
#include <string>
#include <map>
#include <vector>
#include <set>
#include "thirdparty/libbson/include/libbson-1.0/bson.h"
#include "util.h"
struct _bson_t;
namespace bb { // not x2struct, short namespace for easy use
class intf;
typedef std::pair<std::string, intf> pintf;
typedef std::vector<int32_t> vi32;
typedef std::vector<int64_t> vi64;
typedef std::vector<std::string> vs;
typedef std::vector<pintf> vp;
// date time
struct dt {
int64_t t;
dt(int64_t ms):t(ms){}
};
class intf {
enum {
t_i32,
t_i64,
t_vi32,
t_vi64,
t_s,
t_vs,
t_mi,
t_bool,
t_dt,
t_double,
t_vdouble,
};
friend class Convert;
public:
intf(bool v):_type(t_bool),_i64(v){}
intf(int32_t v):_type(t_i32),_i64(v){}
intf(int64_t v):_type(t_i64),_i64(v){}
intf(const dt&v):_type(t_dt),_i64(v.t){}
intf(const vi32& v):_type(t_vi32){
_vi64.resize(v.size());
for (size_t i=0; i<v.size(); ++i) {
_vi64[i] = v[i];
}
}
intf(const vi64& v):_type(t_vi64),_vi64(v){}
intf(const std::string& v):_type(t_s),_s(v){}
intf(const vs& v):_type(t_vs),_vs(v){}
intf(const vp& v):_type(t_mi),_vp(v){}
// fix type
intf(const char* v):_type(t_s),_s(v){}
intf(uint32_t v):_type(t_i32),_i64(v){}
intf(uint64_t v):_type(t_i64),_i64(v){}
intf(const std::vector<uint32_t>& v):_type(t_vi32){
_vi64.resize(v.size());
for (size_t i=0; i<v.size(); ++i) {
_vi64[i] = v[i];
}
}
intf(const std::vector<uint64_t>& v):_type(t_vi64){
_vi64.resize(v.size());
for (size_t i=0; i<v.size(); ++i) {
_vi64[i] = v[i];
}
}
intf(double v):_type(t_double),_db(v){}
intf(float v):_type(t_double),_db(v){}
intf(const std::vector<double>& v):_type(t_vdouble),_vdb(v){}
intf(const std::vector<float>& v):_type(t_vdouble){
_vdb.resize(v.size());
for (size_t i=0; i<v.size(); ++i) {
_vdb[i] = v[i];
}
}
private:
int _type;
int64_t _i64;
std::string _s;
vi64 _vi64;
double _db;
std::vector<double> _vdb;
vs _vs;
vp _vp;
};
class Convert {
public:
enum {
bb_top,
bb_doc,
bb_array
};
static std::string build(const vp&m, _bson_t*parent, const std::string&pname, int type) {
bson_t _static;
bson_t *root = &_static;
if (type == bb_top) {
if (0 != parent) {
root = parent;
} else {
root = &_static;
}
bson_init(root);
} else if (type == bb_doc) {
bson_append_document_begin((bson_t*)parent, pname.c_str(), pname.length(), root);
} else {
bson_append_array_begin((bson_t*)parent, pname.c_str(), pname.length(), root);
}
for (vp::const_iterator iter=m.begin(); iter!=m.end(); ++iter) {
switch (iter->second._type) {
case intf::t_i32:
bson_append_int32(root, iter->first.c_str(), iter->first.length(), iter->second._i64);
break;
case intf::t_i64:
bson_append_int64(root, iter->first.c_str(), iter->first.length(), iter->second._i64);
break;
case intf::t_dt:
bson_append_date_time(root, iter->first.c_str(), iter->first.length(), iter->second._i64);
break;
case intf::t_bool:
bson_append_bool(root, iter->first.c_str(), iter->first.length(), iter->second._i64);
break;
case intf::t_double:
bson_append_double(root, iter->first.c_str(), iter->first.length(), iter->second._db);
break;
case intf::t_vi32: {
bson_t child;
bson_append_array_begin(root, iter->first.c_str(), iter->first.length(), &child);
for (size_t i=0; i<iter->second._vi64.size(); ++i) {
std::string index = x2struct::Util::tostr(i);
bson_append_int32(&child, index.c_str(), index.length(), iter->second._vi64[i]);
}
bson_append_array_end(root, &child);
}
break;
case intf::t_vi64: {
bson_t child;
bson_append_array_begin(root, iter->first.c_str(), iter->first.length(), &child);
for (size_t i=0; i<iter->second._vi64.size(); ++i) {
std::string index = x2struct::Util::tostr(i);
bson_append_int64(&child, index.c_str(), index.length(), iter->second._vi64[i]);
}
bson_append_array_end(root, &child);
}
break;
case intf::t_vdouble: {
bson_t child;
bson_append_array_begin(root, iter->first.c_str(), iter->first.length(), &child);
for (size_t i=0; i<iter->second._vdb.size(); ++i) {
std::string index = x2struct::Util::tostr(i);
bson_append_double(&child, index.c_str(), index.length(), iter->second._vdb[i]);
}
bson_append_array_end(root, &child);
}
break;
case intf::t_s:
bson_append_utf8(root, iter->first.c_str(), iter->first.length(), iter->second._s.c_str(), iter->second._s.length());
break;
case intf::t_vs: {
bson_t child;
bson_append_array_begin(root, iter->first.c_str(), iter->first.length(), &child);
for (size_t i=0; i<iter->second._vs.size(); ++i) {
std::string index = x2struct::Util::tostr(i);
bson_append_utf8(&child, index.c_str(), index.length(), iter->second._vs[i].c_str(), iter->second._vs[i].length());
}
bson_append_array_end(root, &child);
}
break;
case intf::t_mi:
build(iter->second._vp, root, iter->first, bb_doc);
break;
}
}
if (type == bb_top) {
if (0 != parent) {
return "";
} else {
std::string data((const char*)bson_get_data(root), root->len);
bson_destroy(root);
return data;
}
} else if (type == bb_doc) {
bson_append_document_end((bson_t*)parent, root);
} else {
bson_append_array_end((bson_t*)parent, root);
}
return "";
}
static void json(const vp&m, const std::string& space, std::string&root) {
root.append("{").append(space);
for (vp::const_iterator iter=m.begin(); iter!=m.end(); ++iter) {
if (iter != m.begin()) {
root.append(space).append(",").append(space);
}
if (!iter->first.empty()) {
root.append("\"").append(iter->first).append("\"").append(space).append(":").append(space);
}
switch (iter->second._type) {
case intf::t_i32:
case intf::t_i64:
case intf::t_dt:
root.append(x2struct::Util::tostr(iter->second._i64));
break;
case intf::t_bool:
root.append(iter->second._i64?"true":"false");
break;
case intf::t_double:
root.append(x2struct::Util::tostr(iter->second._db));
break;
case intf::t_vi32:
case intf::t_vi64:{
root.append("[").append(space);
for (size_t i=0; i<iter->second._vi64.size(); ++i) {
if (i > 0) {
root.append(space).append(",").append(space);
}
root.append(x2struct::Util::tostr(iter->second._vi64[i]));
}
root.append(space).append("]");
}
break;
case intf::t_vdouble: {
root.append("[").append(space);
for (size_t i=0; i<iter->second._vdb.size(); ++i) {
if (i > 0) {
root.append(space).append(",").append(space);
}
root.append(x2struct::Util::tostr(iter->second._vdb[i]));
}
root.append(space).append("]");
}
break;
case intf::t_s:
root.append("\"").append(iter->second._s).append("\"");
break;
case intf::t_vs: {
root.append("[").append(space);
for (size_t i=0; i<iter->second._vs.size(); ++i) {
if (i > 0) {
root.append(space).append(",").append(space);
}
root.append("\"").append(iter->second._vs[i]).append("\"");
}
root.append(space).append("]");
}
break;
case intf::t_mi:
json(iter->second._vp, space, root);
break;
}
}
root.append(space).append("}");
}
};
/*
if ret is nil, data will return as std::string
if ret is not nil, data will return as bson_t* and !!!need to call bson_destroy(ret)!!!, std::string will be empty
*/
//std::string build(const vp&m, _bson_t**ret, void*parent=0, const std::string&pname="", bool bdoc=false);
inline std::string build(const vp&m, _bson_t*ret) {
return Convert::build(m, ret, "", Convert::bb_top);
}
// translate vp to json string
inline std::string json(const vp&m, bool space=false) {
std::string root;
Convert::json(m, space?" ":"", root);
return root;
}
}
#endif