Library: MongoDB
Package: MongoDB
Header: Poco/MongoDB/Document.h
Description
Represents a MongoDB (BSON) document.
Inheritance
Known Derived Classes: Array, Cursor, OpMsgCursor
Member Summary
Member Functions: add, addElement, addNewArray, addNewDocument, clear, elementNames, empty, exists, get, getInteger, isType, read, remove, size, toString, write
Types Aliases
Ptr
using Ptr = SharedPtr < Document >;
Vector
using Vector = std::vector < Document::Ptr >;
Constructors
Document
Document();
Creates an empty Document.
Destructor
~Document 
virtual ~Document();
Destroys the Document.
Member Functions
add 
template < typename T > Document & add(
const std::string & name,
T value
);
Creates an element with the given name and value and adds it to the document.
The active document is returned to allow chaining of the add methods.
add
Document & add(
const std::string & name,
const char * value
);
Creates an element with the given name and value and adds it to the document.
The active document is returned to allow chaining of the add methods.
addElement
Document & addElement(
Element::Ptr element
);
Add an element to the document.
The active document is returned to allow chaining of the add methods.
addNewArray
Array & addNewArray(
const std::string & name
);
Create a new array and add it to this document. Method returns a reference to the new array.
addNewDocument
Document & addNewDocument(
const std::string & name
);
Create a new document and add it to this document. Unlike the other add methods, this method returns a reference to the new document.
clear
void clear();
Removes all elements from the document.
elementNames
void elementNames(
std::vector < std::string > & keys
) const;
Puts all element names into std::vector.
empty
bool empty() const;
Returns true if the document doesn't contain any documents.
exists
bool exists(
const std::string & name
) const;
Returns true if the document has an element with the given name.
get
template < typename T > T get(
const std::string & name
) const;
Returns the element with the given name and tries to convert it to the template type. When the element is not found, a NotFoundException will be thrown. When the element can't be converted a BadCastException will be thrown.
get
template < typename T > T get(
const std::string & name,
const T & def
) const;
Returns the element with the given name and tries to convert it to the template type. When the element is not found, or has the wrong type, the def argument will be returned.
get
Element::Ptr get(
const std::string & name
) const;
Returns the element with the given name. An empty element will be returned when the element is not found.
getInteger
Int64 getInteger(
const std::string & name
) const;
Returns an integer. Useful when MongoDB returns Int32, Int64 or double for a number (count for example). This method will always return an Int64. When the element is not found, a Poco::NotFoundException will be thrown.
isType
template < typename T > bool isType(
const std::string & name
) const;
Returns true when the type of the element equals the TypeId of ElementTrait.
read
void read(
BinaryReader & reader
);
Reads a document from the reader
remove
bool remove(
const std::string & name
);
Removes an element from the document.
size
std::size_t size() const;
Returns the number of elements in the document.
toString
virtual std::string toString(
int indent = 0
) const;
Returns a String representation of the document.
write
void write(
BinaryWriter & writer
);
Writes a document to the reader
Variables
_elements 
ElementSet _elements;