mirror of
https://github.com/mongodb/mongo.git
synced 2024-12-01 01:21:03 +01:00
994 lines
32 KiB
C++
994 lines
32 KiB
C++
/* jsobj.h
|
|
|
|
BSONObj and its helpers
|
|
|
|
"BSON" stands for "binary JSON" -- ie a binary way to represent objects that would be
|
|
represented in JSON (plus a few extensions useful for databases & other languages).
|
|
*/
|
|
|
|
/**
|
|
* Copyright (C) 2008 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/>.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include "../stdafx.h"
|
|
#include "../util/builder.h"
|
|
#include "boost/utility.hpp"
|
|
|
|
#include <set>
|
|
|
|
namespace mongo {
|
|
|
|
class BSONObj;
|
|
class Record;
|
|
class BSONObjBuilder;
|
|
|
|
#pragma pack(push,1)
|
|
|
|
/**
|
|
the complete list of valie BSON types
|
|
BinData = binary data types.
|
|
EOO = end of object
|
|
*/
|
|
enum BSONType {MinKey=-1, EOO=0, NumberDouble=1, String=2, Object=3, Array=4, BinData=5,
|
|
Undefined=6, jstOID=7, Bool=8, Date=9 , jstNULL=10, RegEx=11 ,
|
|
DBRef=12, Code=13, Symbol=14, CodeWScope=15 ,
|
|
NumberInt = 16,
|
|
JSTypeMax=16,
|
|
MaxKey=127
|
|
};
|
|
|
|
/* subtypes of BinData.
|
|
bdtCustom and above are ones that the JS compiler understands, but are
|
|
opaque to the database.
|
|
*/
|
|
enum BinDataType { Function=1, ByteArray=2, MD5Type=5, bdtCustom=128 };
|
|
|
|
/** Object id's are optional for BSONObjects.
|
|
When present they should be the first object member added.
|
|
The app server serializes OIDs as <8-byte-int><4-byte-int>) using the machine's
|
|
native endianness. We deserialize by casting as an OID object, assuming
|
|
the db server has the same endianness.
|
|
*/
|
|
class OID {
|
|
long long a;
|
|
unsigned b;
|
|
public:
|
|
bool operator==(const OID& r) {
|
|
return a==r.a&&b==r.b;
|
|
}
|
|
bool operator!=(const OID& r) {
|
|
return a!=r.a||b!=r.b;
|
|
}
|
|
string str() const {
|
|
stringstream s;
|
|
s << hex;
|
|
s.fill( '0' );
|
|
s.width( 16 );
|
|
s << a;
|
|
s.width( 8 );
|
|
s << b;
|
|
s << dec;
|
|
return s.str();
|
|
}
|
|
|
|
/**
|
|
sets the contents to a new oid
|
|
*/
|
|
void init();
|
|
|
|
void init( string s );
|
|
|
|
};
|
|
ostream& operator<<( ostream &s, const OID &o );
|
|
|
|
/* marshalled js object format:
|
|
|
|
<unsigned totalSize> {<byte BSONType><cstring FieldName><Data>}* EOO
|
|
totalSize includes itself.
|
|
|
|
Data:
|
|
Bool: <byte>
|
|
EOO: nothing follows
|
|
Undefined: nothing follows
|
|
OID: an OID object
|
|
NumberDouble: <double>
|
|
NumberInt: <int32>
|
|
String: <unsigned32 strsizewithnull><cstring>
|
|
Date: <8bytes>
|
|
Regex: <cstring regex><cstring options>
|
|
Object: a nested object, leading with its entire size, which terminates with EOO.
|
|
Array: same as object
|
|
DBRef: <strlen> <cstring ns> <oid>
|
|
DBRef is a database reference: basically a collection name plus an Object ID
|
|
BinData: <int len> <byte subtype> <byte[len] data>
|
|
Code: a function (not a closure): same format as String.
|
|
Symbol: a language symbol (say a python symbol). same format as String.
|
|
Code With Scope: <total size><String><Object>
|
|
*/
|
|
|
|
/* Formatting mode for generating a JSON from the 10gen representation.
|
|
Strict - strict RFC format
|
|
TenGen - 10gen format, which is close to JS format. This form is understandable by
|
|
javascript running inside the Mongo server via eval()
|
|
JS - Javascript JSON compatible
|
|
*/
|
|
enum JsonStringFormat { Strict, TenGen, JS };
|
|
|
|
#pragma pack(pop)
|
|
|
|
/** BSONElement represents an "element" in a BSONObj. So for the object { a : 3, b : "abc" },
|
|
'a : 3' is the first element (key+value).
|
|
|
|
The BSONElement object points into the BSONObj's data. Thus the BSONObj must stay in scope
|
|
for the life of the BSONElement.
|
|
|
|
<type><fieldName ><value>
|
|
-------- size() ------------
|
|
-fieldNameSize-
|
|
value()
|
|
type()
|
|
*/
|
|
class BSONElement {
|
|
friend class BSONObjIterator;
|
|
friend class BSONObj;
|
|
public:
|
|
string toString() const;
|
|
string jsonString( JsonStringFormat format, bool includeFieldNames = true ) const;
|
|
BSONType type() const {
|
|
return (BSONType) *data;
|
|
}
|
|
bool eoo() const {
|
|
return type() == EOO;
|
|
}
|
|
// If maxLen is specified, don't scan more than maxLen bytes to calculate size.
|
|
int size( int maxLen = -1 ) const;
|
|
|
|
// wrap this element up as a singleton object.
|
|
BSONObj wrap();
|
|
|
|
const char * fieldName() const {
|
|
if ( eoo() ) return ""; // no fieldname for it.
|
|
return data + 1;
|
|
}
|
|
|
|
// raw data be careful:
|
|
const char * value() const {
|
|
return (data + fieldNameSize + 1);
|
|
}
|
|
int valuesize() const {
|
|
return size() - fieldNameSize - 1;
|
|
}
|
|
|
|
bool isBoolean() const {
|
|
return type() == Bool;
|
|
}
|
|
bool boolean() const {
|
|
return *value() ? true : false;
|
|
}
|
|
|
|
unsigned long long date() const {
|
|
return *((unsigned long long*) value());
|
|
}
|
|
//double& number() { return *((double *) value()); }
|
|
|
|
bool isNumber() const {
|
|
return type() == NumberDouble || type() == NumberInt;
|
|
}
|
|
void setNumber(double d) {
|
|
if ( type() == NumberDouble ) *((double *) value()) = d;
|
|
else if ( type() == NumberInt ) *((int *) value()) = (int) d;
|
|
}
|
|
double number() const {
|
|
if ( type() == NumberDouble ) return *((double *) value());
|
|
if ( type() == NumberInt ) return *((int *) value());
|
|
return 0;
|
|
}
|
|
OID& __oid() const {
|
|
return *((OID*) value());
|
|
}
|
|
|
|
// for strings
|
|
int valuestrsize() const {
|
|
return *((int *) value());
|
|
}
|
|
|
|
// for objects the size *includes* the size of the size field
|
|
int objsize() const {
|
|
return *((int *) value());
|
|
}
|
|
|
|
// for strings. also gives you start of the real data for an embedded object
|
|
const char * valuestr() const {
|
|
return value() + 4;
|
|
}
|
|
|
|
const char *valuestrsafe() const {
|
|
return type() == String ? valuestr() : "";
|
|
}
|
|
|
|
const char * codeWScopeCode() const {
|
|
return value() + 8;
|
|
}
|
|
const char * codeWScopeScopeData() const {
|
|
// TODO fix
|
|
return codeWScopeCode() + strlen( codeWScopeCode() ) + 1;
|
|
}
|
|
|
|
BSONObj embeddedObject() const;
|
|
|
|
/* uasserts if not an object */
|
|
BSONObj embeddedObjectUserCheck();
|
|
|
|
BSONObj codeWScopeObject() const;
|
|
|
|
const char *binData(int& len) {
|
|
// BinData: <int len> <byte subtype> <byte[len] data>
|
|
assert( type() == BinData );
|
|
len = valuestrsize();
|
|
return value() + 5;
|
|
}
|
|
|
|
const char *regex() const {
|
|
assert(type() == RegEx);
|
|
return value();
|
|
}
|
|
const char *simpleRegex() const;
|
|
const char *regexFlags() const {
|
|
const char *p = regex();
|
|
return p + strlen(p) + 1;
|
|
}
|
|
|
|
/* like operator== but doesn't check the fieldname,
|
|
just the value.
|
|
*/
|
|
bool valuesEqual(const BSONElement& r) const {
|
|
if ( isNumber() )
|
|
return number() == r.number() && r.isNumber();
|
|
bool match= valuesize() == r.valuesize() &&
|
|
memcmp(value(),r.value(),valuesize()) == 0;
|
|
return match;
|
|
// todo: make "0" == 0.0, undefined==null
|
|
}
|
|
|
|
bool operator==(const BSONElement& r) const {
|
|
if ( strcmp(fieldName(), r.fieldName()) != 0 )
|
|
return false;
|
|
return valuesEqual(r);
|
|
/*
|
|
int sz = size();
|
|
return sz == r.size() &&
|
|
memcmp(data, r.data, sz) == 0;
|
|
*/
|
|
}
|
|
|
|
|
|
/* <0: l<r. 0:l==r. >0:l>r
|
|
order by type, field name, and field value.
|
|
If considerFieldName is true, pay attention to the field name.
|
|
*/
|
|
int woCompare( const BSONElement &e, bool considerFieldName = true ) const;
|
|
|
|
const char * rawdata() {
|
|
return data;
|
|
}
|
|
|
|
int getGtLtOp() const;
|
|
|
|
BSONElement();
|
|
|
|
// Check that data is internally consistent.
|
|
void validate() const;
|
|
|
|
// True if this element may contain subobjects.
|
|
bool mayEncapsulate() const {
|
|
return type() == Object ||
|
|
type() == Array ||
|
|
type() == CodeWScope;
|
|
}
|
|
|
|
private:
|
|
// If maxLen is specified, don't scan more than maxLen bytes.
|
|
BSONElement(const char *d, int maxLen = -1) : data(d) {
|
|
if ( eoo() )
|
|
fieldNameSize = 0;
|
|
else {
|
|
if ( maxLen != -1 ) {
|
|
int size = strnlen( fieldName(), maxLen - 1 );
|
|
massert( "Invalid field name", size != -1 );
|
|
fieldNameSize = size + 1;
|
|
} else {
|
|
fieldNameSize = strlen( fieldName() ) + 1;
|
|
}
|
|
}
|
|
totalSize = -1;
|
|
}
|
|
const char *data;
|
|
int fieldNameSize;
|
|
mutable int totalSize; /* caches the computed size */
|
|
};
|
|
|
|
/* l and r MUST have same type when called: check that first. */
|
|
int compareElementValues(const BSONElement& l, const BSONElement& r);
|
|
int getGtLtOp(BSONElement& e);
|
|
|
|
/**
|
|
C++ representation of a "BSON" object -- that is, an extended JSON-style
|
|
object in a binary representation.
|
|
*/
|
|
class BSONObj : public Stringable {
|
|
friend class BSONObjIterator;
|
|
class Details {
|
|
public:
|
|
~Details() {
|
|
// note refCount means two different things (thus the assert here)
|
|
assert(refCount <= 0);
|
|
if (owned()) {
|
|
free((void *)_objdata);
|
|
}
|
|
_objdata = 0;
|
|
}
|
|
const char *_objdata;
|
|
int _objsize;
|
|
int refCount; // -1 == don't free (we don't "own" the buffer)
|
|
bool owned() {
|
|
return refCount >= 0;
|
|
}
|
|
} *details;
|
|
void init(const char *data, bool ifree) {
|
|
details = new Details();
|
|
details->_objdata = data;
|
|
details->_objsize = *((int*) data);
|
|
assert( details->_objsize > 0 );
|
|
assert( details->_objsize <= 1024 * 1024 * 16 );
|
|
details->refCount = ifree ? 1 : -1;
|
|
}
|
|
public:
|
|
explicit BSONObj(const char *msgdata, bool ifree = false) {
|
|
init(msgdata, ifree);
|
|
}
|
|
BSONObj(Record *r);
|
|
BSONObj() : details(0) { }
|
|
~BSONObj() {
|
|
if ( details ) {
|
|
if ( --details->refCount <= 0 )
|
|
delete details;
|
|
details = 0;
|
|
}
|
|
}
|
|
|
|
void appendSelfToBufBuilder(BufBuilder& b) const {
|
|
assert( objsize() );
|
|
b.append((void *) objdata(), objsize());
|
|
}
|
|
|
|
/** Readable representation of a BSON object in an extended JSON-style notation. */
|
|
string toString() const;
|
|
|
|
// Properly formatted JSON string.
|
|
string jsonString( JsonStringFormat format = Strict ) const;
|
|
|
|
/** note: addFields always adds _id even if not specified */
|
|
int addFields(BSONObj& from, set<string>& fields); /* returns n added */
|
|
|
|
/** returns # of top level fields in the object
|
|
note: iterates to count the fields
|
|
*/
|
|
int nFields() const;
|
|
|
|
/** adds the field names to the fields set. does NOT clear it (appends). */
|
|
int getFieldNames(set<string>& fields) const;
|
|
|
|
/** return has eoo() true if no match
|
|
supports "." notation to reach into embedded objects
|
|
*/
|
|
BSONElement getFieldDotted(const char *name) const;
|
|
// Like above, but returns first array encountered while traversing the
|
|
// dotted fields of name. The name variable is updated to represent field
|
|
// names with respect to the returned element.
|
|
BSONElement getFieldDottedOrArray(const char *&name) const;
|
|
|
|
BSONElement getField(const string name) const {
|
|
return getField( name.c_str() );
|
|
};
|
|
BSONElement getField(const char *name) const; /* return has eoo() true if no match */
|
|
|
|
/** @return true if field exists */
|
|
bool hasField( const char * name )const {
|
|
return ! getField( name ).eoo();
|
|
}
|
|
|
|
// returns "" if DNE or wrong type
|
|
const char * getStringField(const char *name) const;
|
|
|
|
/** @return subobject of the given name */
|
|
BSONObj getObjectField(const char *name) const;
|
|
|
|
int getIntField(const char *name) const; // INT_MIN if not present
|
|
|
|
bool getBoolField(const char *name) const;
|
|
|
|
/** makes a new BSONObj with the fields specified in pattern.
|
|
fields returned in the order they appear in pattern.
|
|
if any field missing, you get back an empty object overall.
|
|
|
|
sets element field names to empty string
|
|
If an array is encountered while scanning the dotted names in pattern,
|
|
that array is added to the returned obj, rather than any subobjects
|
|
referenced within the array. The variable nameWithinArray is set to the
|
|
name of the requested field within the returned array.
|
|
*/
|
|
BSONObj extractFieldsDotted(BSONObj pattern, BSONObjBuilder& b, const char *&nameWithinArray) const; // this version, builder owns the returned obj buffer
|
|
|
|
/**
|
|
sets element field names to empty string
|
|
*/
|
|
BSONObj extractFieldsUnDotted(BSONObj pattern) const;
|
|
|
|
/** extract items from object which match a pattern object.
|
|
e.g., if pattern is { x : 1, y : 1 }, builds an object with
|
|
x and y elements of this object, if they are present.
|
|
returns elements with original field names
|
|
*/
|
|
BSONObj extractFields(BSONObj &pattern);
|
|
|
|
const char *objdata() const {
|
|
return details->_objdata;
|
|
}
|
|
int objsize() const {
|
|
return details ? details->_objsize : 0; // includes the embedded size field
|
|
}
|
|
|
|
/** @return true if object is empty -- i.e., {} */
|
|
bool isEmpty() const {
|
|
return objsize() <= 5;
|
|
}
|
|
|
|
/* sigh...details == 0 is such a pain we have to eliminate that possibility */
|
|
void validateEmpty();
|
|
|
|
void dump() {
|
|
out() << hex;
|
|
const char *p = objdata();
|
|
for ( int i = 0; i < objsize(); i++ ) {
|
|
out() << i << '\t' << (unsigned) *p;
|
|
if ( *p >= 'A' && *p <= 'z' )
|
|
out() << '\t' << *p;
|
|
out() << endl;
|
|
p++;
|
|
}
|
|
}
|
|
|
|
// Alternative output format
|
|
string hexDump() const;
|
|
|
|
/**wo='well ordered'. fields must be in same order in each object.
|
|
Ordering is with respect to the signs of the elements in idxKey.
|
|
@return <0 if l<r. 0 if l==r. >0 if l>r
|
|
*/
|
|
int woCompare(const BSONObj& r, const BSONObj &idxKey = BSONObj(),
|
|
bool considerFieldName=true) const;
|
|
|
|
/** This is "shallow equality" -- ints and doubles won't match. for a
|
|
deep equality test use woCompare (which is slower).
|
|
*/
|
|
bool woEqual(const BSONObj& r) const {
|
|
int os = objsize();
|
|
if ( os == r.objsize() ) {
|
|
return (os == 0 || memcmp(objdata(),r.objdata(),os)==0);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/** @return first field of the object */
|
|
BSONElement firstElement() const {
|
|
return BSONElement(objdata() + 4);
|
|
}
|
|
|
|
/** @return element with fieldname "name". returnvalue.eoo() is true if not found */
|
|
BSONElement findElement(const char *name) const;
|
|
|
|
/** @return element with fieldname "name". returnvalue.eoo() is true if not found */
|
|
BSONElement findElement(string name) const {
|
|
return findElement(name.c_str());
|
|
}
|
|
|
|
/** @return true if field exists in the object */
|
|
bool hasElement(const char *name);
|
|
|
|
/** get the _id field from the object. assumes _id is the first
|
|
element of the object -- this is done for performance. drivers should
|
|
honor this convention.
|
|
*/
|
|
bool getObjectID(BSONElement& e) {
|
|
BSONElement f = firstElement();
|
|
if( strcmp(f.fieldName(), "_id") )
|
|
return false;
|
|
e = f;
|
|
return true;
|
|
}
|
|
|
|
OID* __getOID() {
|
|
BSONElement e = firstElement();
|
|
if ( e.type() != jstOID )
|
|
return 0;
|
|
return &e.__oid();
|
|
}
|
|
|
|
BSONObj(const BSONObj& r) {
|
|
if ( r.details == 0 )
|
|
details = 0;
|
|
else if ( r.details->owned() ) {
|
|
details = r.details;
|
|
details->refCount++;
|
|
}
|
|
else {
|
|
details = new Details(*r.details);
|
|
}
|
|
}
|
|
BSONObj& operator=(const BSONObj& r) {
|
|
if ( details && details->owned() ) {
|
|
if ( --details->refCount == 0 )
|
|
delete details;
|
|
}
|
|
|
|
if ( r.details == 0 )
|
|
details = 0;
|
|
else if ( r.details->owned() ) {
|
|
details = r.details;
|
|
details->refCount++;
|
|
}
|
|
else {
|
|
details = new Details(*r.details);
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
/* makes a copy of the object. Normally, a jsobj points to data "owned"
|
|
by something else. this is a useful way to get your own copy of the buffer
|
|
data (which is freed when the new jsobj destructs).
|
|
*/
|
|
BSONObj copy() const;
|
|
|
|
int hash() const {
|
|
unsigned x = 0;
|
|
const char *p = objdata();
|
|
for ( int i = 0; i < objsize(); i++ )
|
|
x = x * 131 + p[i];
|
|
return (x & 0x7fffffff) | 0x8000000; // must be > 0
|
|
}
|
|
|
|
// Return a version of this object where top level elements of types
|
|
// that are not part of the bson wire protocol are replaced with
|
|
// string identifier equivalents.
|
|
// TODO Support conversion of element types other than min and max.
|
|
BSONObj clientReadable() const;
|
|
|
|
// Return new object with the field names replaced.
|
|
BSONObj replaceFieldNames( const vector< string > &names ) const;
|
|
|
|
// true unless corrupt
|
|
bool valid() const;
|
|
};
|
|
ostream& operator<<( ostream &s, const BSONObj &o );
|
|
ostream& operator<<( ostream &s, const BSONElement &e );
|
|
|
|
class BSONObjCmp {
|
|
public:
|
|
BSONObjCmp( const BSONObj &_order ) : order( _order ) {}
|
|
bool operator()( const BSONObj &l, const BSONObj &r ) const {
|
|
return l.woCompare( r, order ) < 0;
|
|
}
|
|
private:
|
|
BSONObj order;
|
|
};
|
|
|
|
class BSONObjCmpDefaultOrder : public BSONObjCmp {
|
|
public:
|
|
BSONObjCmpDefaultOrder() : BSONObjCmp( BSONObj() ) {}
|
|
};
|
|
|
|
typedef set< BSONObj, BSONObjCmpDefaultOrder > BSONObjSetDefaultOrder;
|
|
|
|
#define BUILDOBJ(x) ( BSONObjBuilder() << x ).doneAndDecouple()
|
|
|
|
class BSONObjBuilderValueStream {
|
|
public:
|
|
BSONObjBuilderValueStream( const char * fieldName , BSONObjBuilder * builder );
|
|
|
|
BSONObjBuilder& operator<<( const char * value );
|
|
BSONObjBuilder& operator<<( const string& v ) { return (*this << v.c_str()); }
|
|
BSONObjBuilder& operator<<( const int value );
|
|
BSONObjBuilder& operator<<( const double value );
|
|
|
|
private:
|
|
const char * _fieldName;
|
|
BSONObjBuilder * _builder;
|
|
};
|
|
|
|
/**
|
|
utility for creating BSONObj
|
|
*/
|
|
class BSONObjBuilder {
|
|
public:
|
|
BSONObjBuilder(int initsize=512) : b(initsize) {
|
|
b.skip(4); /*leave room for size field*/
|
|
}
|
|
|
|
/* add all the fields from the object specified to this object */
|
|
BSONObjBuilder& appendElements(BSONObj x);
|
|
|
|
void append(BSONElement& e) {
|
|
assert( !e.eoo() ); // do not append eoo, that would corrupt us. the builder auto appends when done() is called.
|
|
b.append((void*) e.rawdata(), e.size());
|
|
}
|
|
|
|
/* append an element but with a new name */
|
|
void appendAs(const BSONElement& e, const char *as) {
|
|
b.append((char) e.type());
|
|
b.append(as);
|
|
b.append((void *) e.value(), e.valuesize());
|
|
}
|
|
|
|
/* add a subobject as a member */
|
|
void append(const char *fieldName, BSONObj subObj) {
|
|
b.append((char) Object);
|
|
b.append(fieldName);
|
|
b.append((void *) subObj.objdata(), subObj.objsize());
|
|
}
|
|
|
|
/* add a subobject as a member with type Array. Thus arr object should have "0", "1", ...
|
|
style fields in it.
|
|
*/
|
|
void appendArray(const char *fieldName, BSONObj subObj) {
|
|
b.append((char) Array);
|
|
b.append(fieldName);
|
|
b.append((void *) subObj.objdata(), subObj.objsize());
|
|
}
|
|
|
|
void appendBool(const char *fieldName, int val) {
|
|
b.append((char) Bool);
|
|
b.append(fieldName);
|
|
b.append((char) (val?1:0));
|
|
}
|
|
void appendInt(const char *fieldName, int n) {
|
|
b.append((char) NumberInt);
|
|
b.append(fieldName);
|
|
b.append(n);
|
|
}
|
|
BSONObjBuilder& append(const char *fieldName, double n) {
|
|
b.append((char) NumberDouble);
|
|
b.append(fieldName);
|
|
b.append(n);
|
|
return *this;
|
|
}
|
|
void appendOID(const char *fieldName, OID *oid = 0) {
|
|
b.append((char) jstOID);
|
|
b.append(fieldName);
|
|
if ( oid )
|
|
b.append( (void *) oid, 12 );
|
|
else {
|
|
OID tmp;
|
|
memset( &tmp, 0, 12 );
|
|
b.append( (void *) &tmp, 12 );
|
|
}
|
|
}
|
|
void appendDate(const char *fieldName, unsigned long long dt) {
|
|
b.append((char) Date);
|
|
b.append(fieldName);
|
|
b.append(dt);
|
|
}
|
|
void appendRegex(const char *fieldName, const char *regex, const char *options = "") {
|
|
b.append((char) RegEx);
|
|
b.append(fieldName);
|
|
b.append(regex);
|
|
b.append(options);
|
|
}
|
|
void appendCode(const char *fieldName, const char *code) {
|
|
b.append((char) Code);
|
|
b.append(fieldName);
|
|
b.append((int) strlen(code)+1);
|
|
b.append(code);
|
|
}
|
|
BSONObjBuilder& append(const char *fieldName, const char *str) {
|
|
b.append((char) String);
|
|
b.append(fieldName);
|
|
b.append((int) strlen(str)+1);
|
|
b.append(str);
|
|
return *this;
|
|
}
|
|
void append(const char *fieldName, string str) {
|
|
append(fieldName, str.c_str());
|
|
}
|
|
void appendSymbol(const char *fieldName, const char *symbol) {
|
|
b.append((char) Symbol);
|
|
b.append(fieldName);
|
|
b.append((int) strlen(symbol)+1);
|
|
b.append(symbol);
|
|
}
|
|
void appendNull( const char *fieldName ) {
|
|
b.append( (char) jstNULL );
|
|
b.append( fieldName );
|
|
}
|
|
// Append an element that is less than all other keys.
|
|
void appendMinKey( const char *fieldName ) {
|
|
b.append( (char) MinKey );
|
|
b.append( fieldName );
|
|
}
|
|
// Append an element that is greater than all other keys.
|
|
void appendMaxKey( const char *fieldName ) {
|
|
b.append( (char) MaxKey );
|
|
b.append( fieldName );
|
|
}
|
|
void appendDBRef( const char *fieldName, const char *ns, const OID &oid ) {
|
|
b.append( (char) DBRef );
|
|
b.append( fieldName );
|
|
b.append( (int) strlen( ns ) + 1 );
|
|
b.append( ns );
|
|
b.append( (void *) &oid, 12 );
|
|
}
|
|
void appendBinData( const char *fieldName, int len, BinDataType type, const char *data ) {
|
|
b.append( (char) BinData );
|
|
b.append( fieldName );
|
|
b.append( len );
|
|
b.append( (char) type );
|
|
b.append( (void *) data, len );
|
|
}
|
|
void appendCodeWScope( const char *fieldName, const char *code, const BSONObj &scope ) {
|
|
b.append( (char) CodeWScope );
|
|
b.append( fieldName );
|
|
b.append( ( int )( 4 + 4 + strlen( code ) + 1 + scope.objsize() ) );
|
|
b.append( ( int ) strlen( code ) + 1 );
|
|
b.append( code );
|
|
b.append( ( void * )scope.objdata(), scope.objsize() );
|
|
}
|
|
|
|
template < class T >
|
|
void append( const char *fieldName, const vector< T >& vals ) {
|
|
BSONObjBuilder arrBuilder;
|
|
for ( unsigned int i = 0; i < vals.size(); ++i )
|
|
arrBuilder.append( numStr( i ).c_str(), vals[ i ] );
|
|
marshalArray( fieldName, arrBuilder.done() );
|
|
}
|
|
|
|
void appendIntArray( const char *fieldName, const vector< int >& vals ) {
|
|
BSONObjBuilder arrBuilder;
|
|
for ( unsigned i = 0; i < vals.size(); ++i )
|
|
arrBuilder.appendInt( numStr( i ).c_str(), vals[ i ] );
|
|
marshalArray( fieldName, arrBuilder.done() );
|
|
}
|
|
|
|
/* BSONObj will free the buffer when it is finished. */
|
|
BSONObj doneAndDecouple() {
|
|
int l;
|
|
return BSONObj(decouple(l), true);
|
|
}
|
|
|
|
/** Fetch the object we have built.
|
|
BSONObjBuilder still frees the object when the builder goes out of
|
|
scope -- very important to keep in mind. Use doneAndDecouple() if you
|
|
would like the BSONObj to last longer than the builder.
|
|
*/
|
|
BSONObj done() {
|
|
return BSONObj(_done());
|
|
}
|
|
|
|
/* assume ownership of the buffer - you must then free it (with free()) */
|
|
char* decouple(int& l) {
|
|
char *x = _done();
|
|
assert( x );
|
|
l = b.len();
|
|
b.decouple();
|
|
return x;
|
|
}
|
|
void decouple() {
|
|
b.decouple(); // post done() call version. be sure jsobj frees...
|
|
}
|
|
|
|
static string numStr( int i ) {
|
|
stringstream o;
|
|
o << i;
|
|
return o.str();
|
|
}
|
|
|
|
BSONObjBuilderValueStream operator<<(const char * name ) {
|
|
return BSONObjBuilderValueStream( name , this );
|
|
}
|
|
|
|
BSONObjBuilderValueStream operator<<( string name ) {
|
|
return BSONObjBuilderValueStream( name.c_str() , this );
|
|
}
|
|
|
|
|
|
private:
|
|
// Append the provided arr object as an array.
|
|
void marshalArray( const char *fieldName, const BSONObj &arr ) {
|
|
b.append( (char) Array );
|
|
b.append( fieldName );
|
|
b.append( (void *) arr.objdata(), arr.objsize() );
|
|
}
|
|
|
|
char* _done() {
|
|
b.append((char) EOO);
|
|
char *data = b.buf();
|
|
*((int*)data) = b.len();
|
|
return data;
|
|
}
|
|
|
|
BufBuilder b;
|
|
};
|
|
|
|
|
|
/* iterator for a BSONObj
|
|
|
|
Note each BSONObj ends with an EOO element: so you will get more() on an empty
|
|
object, although next().eoo() will be true.
|
|
*/
|
|
class BSONObjIterator {
|
|
public:
|
|
BSONObjIterator(const BSONObj& jso) {
|
|
int sz = jso.objsize();
|
|
if ( sz == 0 ) {
|
|
pos = theend = 0;
|
|
return;
|
|
}
|
|
pos = jso.objdata() + 4;
|
|
theend = jso.objdata() + sz;
|
|
}
|
|
bool more() {
|
|
return pos < theend;
|
|
}
|
|
BSONElement next( bool checkEnd = false ) {
|
|
assert( pos < theend );
|
|
BSONElement e( pos, checkEnd ? theend - pos : -1 );
|
|
pos += e.size( checkEnd ? theend - pos : -1 );
|
|
return e;
|
|
}
|
|
private:
|
|
const char *pos;
|
|
const char *theend;
|
|
};
|
|
|
|
/* iterator a BSONObj which is an array, in array order.
|
|
class JSArrayIter {
|
|
public:
|
|
BSONObjIterator(const BSONObj& jso) {
|
|
...
|
|
}
|
|
bool more() { return ... }
|
|
BSONElement next() {
|
|
...
|
|
}
|
|
};
|
|
*/
|
|
|
|
} // namespace mongo
|
|
|
|
#include "matcher.h"
|
|
|
|
namespace mongo {
|
|
|
|
extern BSONObj maxKey;
|
|
extern BSONObj minKey;
|
|
|
|
/*- just for testing -- */
|
|
|
|
#pragma pack(push,1)
|
|
struct JSObj1 {
|
|
JSObj1() {
|
|
totsize=sizeof(JSObj1);
|
|
n = NumberDouble;
|
|
strcpy_s(nname, 5, "abcd");
|
|
N = 3.1;
|
|
s = String;
|
|
strcpy_s(sname, 7, "abcdef");
|
|
slen = 10;
|
|
strcpy_s(sval, 10, "123456789");
|
|
eoo = EOO;
|
|
}
|
|
unsigned totsize;
|
|
|
|
char n;
|
|
char nname[5];
|
|
double N;
|
|
|
|
char s;
|
|
char sname[7];
|
|
unsigned slen;
|
|
char sval[10];
|
|
|
|
char eoo;
|
|
};
|
|
#pragma pack(pop)
|
|
extern JSObj1 js1;
|
|
|
|
inline BSONObj BSONElement::embeddedObjectUserCheck() {
|
|
uassert( "invalid parameter: expected an object", type()==Object || type()==Array );
|
|
return BSONObj(value());
|
|
}
|
|
|
|
inline BSONObj BSONElement::embeddedObject() const {
|
|
assert( type()==Object || type()==Array );
|
|
return BSONObj(value());
|
|
}
|
|
|
|
inline BSONObj BSONElement::codeWScopeObject() const {
|
|
assert( type() == CodeWScope );
|
|
int strSizeWNull = *(int *)( value() + 4 );
|
|
return BSONObj( value() + 4 + 4 + strSizeWNull );
|
|
}
|
|
|
|
inline BSONObj BSONObj::copy() const {
|
|
if ( isEmpty() )
|
|
return *this;
|
|
|
|
char *p = (char*) malloc(objsize());
|
|
memcpy(p, objdata(), objsize());
|
|
return BSONObj(p, true);
|
|
}
|
|
|
|
// wrap this element up as a singleton object.
|
|
inline BSONObj BSONElement::wrap() {
|
|
BSONObjBuilder b;
|
|
b.append(*this);
|
|
return b.doneAndDecouple();
|
|
}
|
|
|
|
inline bool BSONObj::hasElement(const char *name) {
|
|
if ( !isEmpty() ) {
|
|
BSONObjIterator it(*this);
|
|
while ( it.more() ) {
|
|
BSONElement e = it.next();
|
|
if ( strcmp(name, e.fieldName()) == 0 )
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
inline BSONElement BSONObj::findElement(const char *name) const {
|
|
if ( !isEmpty() ) {
|
|
BSONObjIterator it(*this);
|
|
while ( it.more() ) {
|
|
BSONElement e = it.next();
|
|
if ( strcmp(name, e.fieldName()) == 0 )
|
|
return e;
|
|
}
|
|
}
|
|
return BSONElement();
|
|
}
|
|
|
|
/* add all the fields from the object specified to this object */
|
|
inline BSONObjBuilder& BSONObjBuilder::appendElements(BSONObj x) {
|
|
BSONObjIterator it(x);
|
|
while ( it.more() ) {
|
|
BSONElement e = it.next();
|
|
if ( e.eoo() ) break;
|
|
append(e);
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
extern BSONObj emptyObj;
|
|
|
|
inline void BSONObj::validateEmpty() {
|
|
if ( details == 0 )
|
|
*this = emptyObj;
|
|
}
|
|
|
|
|
|
} // namespace mongo
|