Library: Data
Package: DataCore
Header: Poco/Data/BLOB.h
Description
Representation of a Binary Large OBject.
A BLOB can hold arbitrary binary data. The maximum size depends on the underlying database.
The BLOBInputStream and BLOBOutputStream classes provide a convenient way to access the data in a BLOB.
Member Summary
Member Functions: appendRaw, assignRaw, begin, clear, compact, content, end, operator !=, operator =, operator ==, rawContent, size, swap
Types
Iterator
typedef std::vector < char >::const_iterator Iterator;
Constructors
BLOB
BLOB();
Creates an empty BLOB.
BLOB
BLOB(
const std::vector < char > & content
);
Creates the BLOB, content is deep-copied.
BLOB
BLOB(
const std::string & content
);
Creates a BLOB from a string.
BLOB
Creates a BLOB by copying another one.
BLOB
BLOB(
const char * const pContent,
std::size_t size
);
Creates the BLOB by deep-copying pContent.
Destructor
~BLOB
~BLOB();
Destroys the BLOB.
Member Functions
appendRaw 
void appendRaw(
const char * pChar,
std::size_t count
);
Assigns raw content to internal storage.
assignRaw
void assignRaw(
const char * pChar,
std::size_t count
);
Assigns raw content to internal storage.
begin
Iterator begin() const;
clear
void clear(
bool doCompact = false
);
Clears the content of the blob. If doCompact is true, trims the excess capacity.
compact
void compact();
Trims the internal storage excess capacity.
content
const std::vector < char > & content() const;
Returns the content.
end
Iterator end() const;
operator !=
bool operator != (
const BLOB & other
) const;
Compares for inequality BLOB by value.
operator =
BLOB & operator = (
const BLOB & other
);
Assignment operator.
operator ==
bool operator == (
const BLOB & other
) const;
Compares for equality BLOB by value.
rawContent
const char * rawContent() const;
Returns the raw content.
If the BLOB is empty, returns NULL.
size
std::size_t size() const;
Returns the size of the BLOB in bytes.
swap
void swap(
BLOB & other
);
Swaps the BLOB with another one.