Metadata key-value map using a restricted set of value types. More...

#include <ome/files/MetadataMap.h>

Collaboration diagram for ome::files::MetadataMap:

Classes
struct	getkey
	Functor to get a map key. More...

struct	make_vector
	Convert T into a std::vector<T>. More...

Public Types
typedef std::string	key_type
	Key type.

typedef boost::make_variant_over< discriminated_types >::type	value_type
	Value type, allowing assignment of all storable types.

typedef std::map< key_type, value_type >	map_type
	std::string to discriminated type mapping.

typedef map_type::size_type	size_type
	Size type.

typedef map_type::iterator	iterator
	Iterator.

typedef map_type::const_iterator	const_iterator
	Constant iterator.

typedef map_type::reverse_iterator	reverse_iterator
	Reverse iterator.

typedef map_type::const_reverse_iterator	const_reverse_iterator
	Constant reverse iterator.

Public Member Functions
	MetadataMap ()
	Constructor.

	~MetadataMap ()
	Destructor.

void	set (const key_type &key, const value_type &value)
	Add a key-value pair to the map. More...

template<typename T >
void	set (const key_type &key, const T &value)
	Add a key-value pair to the map. More...

template<typename T >
void	append (const key_type &key, const T &value)
	Append a value to a vector. More...

bool	get (const key_type &key, value_type &value) const
	Get the value of a particular key from the map. More...

template<typename T >
bool	get (const key_type &key, T &value) const
	Get the value of a particular key from the map. More...

template<typename T >
T &	get (const key_type &key)
	Get a reference to the value of a particular key from the map. More...

template<typename T >
const T &	get (const key_type &key) const
	Get a reference to the value of a particular key from the map. More...

iterator	find (const key_type &key)
	Find a key in the map. More...

const_iterator	find (const key_type &key) const
	Find a key in the map. More...

std::pair< iterator, bool >	insert (map_type::value_type &value)
	Insert a value into the map. More...

void	erase (const key_type &key)
	Erase a key from the map by name. More...

void	erase (iterator pos)
	Erase a key from the map by an iterator position. More...

std::vector< key_type >	keys () const
	Get a list of keys in the map. More...

void	merge (const MetadataMap &map, const std::string &prefix)
	Merge a separate map into this map. More...

MetadataMap	flatten () const
	Create a flattened map. More...

map_type &	map ()
	Get the underlying map. More...

const map_type &	map () const
	Get the underlying map. More...

iterator	begin ()
	Get an iterator to the beginning of the map. More...

const_iterator	begin () const
	Get a constant iterator to the beginning of the map. More...

iterator	end ()
	Get an iterator to the end of the map. More...

const_iterator	end () const
	Get a constant iterator to the end of the map. More...

reverse_iterator	rbegin ()
	Get a reverse iterator to the end of the map. More...

const_reverse_iterator	rbegin () const
	Get a constant reverse iterator to the end of the map. More...

reverse_iterator	rend ()
	Get a reverse iterator to the beginning of the map. More...

const_reverse_iterator	rend () const
	Get a constant reverse iterator to the beginning of the map. More...

value_type &	operator[] (const key_type &key)
	Get or set a value by key index. More...

bool	operator== (const MetadataMap &rhs) const
	Compare maps for equality. More...

bool	operator!= (const MetadataMap &rhs) const
	Compare maps for non-equality. More...

bool	operator< (const MetadataMap &rhs) const
	Check if map is less than another map. More...

bool	operator<= (const MetadataMap &rhs) const
	Check if map is less than or equal to another map. More...

bool	operator> (const MetadataMap &rhs) const
	Check if map is greater than another map. More...

bool	operator>= (const MetadataMap &rhs) const
	Check if map is greater than or equal to another map. More...

size_type	size () const
	Get the size of the map. More...

bool	empty () const
	Check if the map is empty. More...

void	clear ()
	Clear the map. More...

Private Types
typedef boost::mpl::vector< std::string, bool >	non_numeric_types
	Storable non-numeric types.

typedef boost::mpl::vector< uint8_t, uint16_t, uint32_t, uint64_t, int8_t, int16_t, int32_t, int64_t >	integer_types
	Storable integer types.

typedef boost::mpl::vector< float, double, long double >	float_types
	Storable floating-point types.

typedef boost::mpl::joint_view< integer_types, float_types >::type	numeric_types_view
	Aggregate view of all numeric types.

typedef boost::mpl::joint_view< non_numeric_types, numeric_types_view >::type	basic_types_view
	Aggregate view of all storable simple types.

typedef boost::mpl::transform_view< basic_types_view, make_vector< boost::mpl::_1 > >::type	list_types_view
	Aggregate view of all storable list types.

typedef boost::mpl::joint_view< basic_types_view, list_types_view >	all_types_view
	Aggregate view of all storable types.

typedef boost::mpl::insert_range< boost::mpl::vector0<>, boost::mpl::end< boost::mpl::vector0<> >::type, all_types_view >::type	discriminated_types
	List of discriminated types used by boost::variant.

Private Attributes
map_type	discriminating_map
	Key-value mapping.

Detailed Description

Metadata key-value map using a restricted set of value types.

Permitted types include std::string, bool, integer types (uint8_t, uint16_t, uint32_t, uint64_t, int8_t, int16_t, int32_t, int64_t) and floating point types (float, double, long double). Additionally a std::vector specialised for each of the aforementioned types may also be stored. However, types may not be mixed within a single std::vector.

The set() method permits setting of values, which includes both simple values and vectors of any supported type. The convenience method append() allows appending of a single value to a list.

The get() methods permit retrieval of values. There are various forms, which offer different tradeoffs, for example copying the value and returning an error, versus returning a direct reference but throwing an exception on error.

Member Function Documentation

template<typename T >

void ome::files::MetadataMap::append	(	const key_type &	key,
		const T &	value
	)

inline

Append a value to a vector.

Note: If a key by the same already exists in the map and is of the wrong type or is not a vector, it will be removed and replaced.

Parameters

key	the key name.
value	the value to append.

iterator ome::files::MetadataMap::begin ( )

inline

Get an iterator to the beginning of the map.

Returns: an iterator.

Referenced by keys(), merge(), and ome::files::detail::FormatReader::setId().

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const_iterator ome::files::MetadataMap::begin ( ) const

inline

Get a constant iterator to the beginning of the map.

Returns: a constant iterator.

void ome::files::MetadataMap::clear ( )

inline

Clear the map.

All keys are cleared from the map.

Referenced by ome::files::detail::FormatReader::initFile().

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bool ome::files::MetadataMap::empty ( ) const

inline

Check if the map is empty.

Returns: true if empty, false otherwise.

Referenced by ome::files::fillOriginalMetadata().

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iterator ome::files::MetadataMap::end ( )

inline

Get an iterator to the end of the map.

Returns: an iterator.

Referenced by get(), keys(), merge(), set(), and ome::files::detail::FormatReader::setId().

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const_iterator ome::files::MetadataMap::end ( ) const

inline

Get a constant iterator to the end of the map.

Returns: a constant iterator.

void ome::files::MetadataMap::erase ( const key_type & key )

inline

Erase a key from the map by name.

Parameters

key	the key to erase.

Referenced by set().

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void ome::files::MetadataMap::erase ( iterator pos )

inline

Erase a key from the map by an iterator position.

Parameters

pos	the iterator position to erase.

iterator ome::files::MetadataMap::find ( const key_type & key )

inline

Find a key in the map.

Parameters

key	the key to find.

Returns: an iterator to the key-value pair.

Referenced by get(), and set().

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const_iterator ome::files::MetadataMap::find ( const key_type & key ) const

inline

Find a key in the map.

Parameters

key	the key to find.

Returns: an iterator to the key-value pair.

MetadataMap ome::files::MetadataMap::flatten ( ) const

inline

Create a flattened map.

All vectors in the map will be flattened, which is the replacement of each vector by a key per element with with a #n key suffix.

Returns: the flattened map.

References discriminating_map, and map().

Referenced by ome::files::fillOriginalMetadata(), and merge().

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bool ome::files::MetadataMap::get	(	const key_type &	key,
		value_type &	value
	)		const

inline

Get the value of a particular key from the map.

If the key was not found, value will remain unmodified.

Parameters

key	the key to find.
value	a reference to store a copy of the value.

Returns: true if the key was found, false otherwise.

References end(), and find().

Referenced by ome::files::detail::FormatReader::getMetadataValue(), and ome::files::detail::FormatReader::getSeriesMetadataValue().

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template<typename T >

bool ome::files::MetadataMap::get	(	const key_type &	key,
		T &	value
	)		const

inline

Get the value of a particular key from the map.

If the key was not found, or the type of value does not match the stored value type, value will remain unmodified.

Parameters

key	the key to find.
value	a reference to store a copy of the value.

Returns: true if the key was found and the value was of the correct type, false otherwise.

template<typename T >

T& ome::files::MetadataMap::get ( const key_type & key )

inline

Get a reference to the value of a particular key from the map.

If the key was not found, or the type of value does not match the stored value type, value will remain unmodified.

Parameters

key	the key to find.

Returns: a reference to the stored value.

Exceptions

boost::bad_get on failure if the key was not found or if the type did not match the stored value type.

template<typename T >

const T& ome::files::MetadataMap::get ( const key_type & key ) const

inline

Get a reference to the value of a particular key from the map.

If the key was not found, or the type of value does not match the stored value type, value will remain unmodified.

Parameters

key	the key to find.

Returns: a reference to the stored value.

Exceptions

boost::bad_get on failure if the key was not found or if the type did not match the stored value type.

std::pair<iterator, bool> ome::files::MetadataMap::insert ( map_type::value_type & value )

inline

Insert a value into the map.

Note that this method is an alternative to set(), which retains the insert semantics of std::map::insert(), i.e. it will not replace keys which already exist in the map, and so will be a no-op if the key is already present.

Parameters

value the value to insert.

Returns: an iterator to the inserted key, or prexisting key if present, and true if the value was inserted, false otherwise.

Referenced by merge(), and set().

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std::vector<key_type> ome::files::MetadataMap::keys ( ) const

inline

Get a list of keys in the map.

Note: This is inefficient, and exists solely for compatibility with the Java implementation. Using the iterator interface directly should be preferred.

Returns: a sorted list of keys.

References begin(), and end().

map_type& ome::files::MetadataMap::map ( )

inline

Get the underlying map.

Returns: a reference to the map.

References discriminating_map.

Referenced by flatten().

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const map_type& ome::files::MetadataMap::map ( ) const

inline

Get the underlying map.

Returns: a reference to the map.

References discriminating_map.

void ome::files::MetadataMap::merge	(	const MetadataMap &	map,
		const std::string &	prefix
	)

inline

Merge a separate map into this map.

Parameters

map	the map to merge.
prefix	a prefix to append to the keys of the map being merged.

References begin(), end(), flatten(), and insert().

bool ome::files::MetadataMap::operator!= ( const MetadataMap & rhs ) const

inline

Compare maps for non-equality.

Parameters

rhs	the map to compare.

Returns: true if not equal to rhs, false otherwise.

References discriminating_map.

bool ome::files::MetadataMap::operator< ( const MetadataMap & rhs ) const

inline

Check if map is less than another map.

Parameters

rhs	the map to compare.

Returns: true if less than rhs, false otherwise.

References discriminating_map.

bool ome::files::MetadataMap::operator<= ( const MetadataMap & rhs ) const

inline

Check if map is less than or equal to another map.

Parameters

rhs	the map to compare.

Returns: true if less than or equal to rhs, false otherwise.

References discriminating_map.

bool ome::files::MetadataMap::operator== ( const MetadataMap & rhs ) const

inline

Compare maps for equality.

Parameters

rhs	the map to compare.

Returns: true if equal to rhs, false otherwise.

References discriminating_map.

bool ome::files::MetadataMap::operator> ( const MetadataMap & rhs ) const

inline

Check if map is greater than another map.

Parameters

rhs	the map to compare.

Returns: true if greater than rhs, false otherwise.

References discriminating_map.

bool ome::files::MetadataMap::operator>= ( const MetadataMap & rhs ) const

inline

Check if map is greater than or equal to another map.

Parameters

rhs	the map to compare.

Returns: true if greater than or equal to rhs, false otherwise.

References discriminating_map.

value_type& ome::files::MetadataMap::operator[] ( const key_type & key )

inline

Get or set a value by key index.

Access the metadata map as an associative array. This may be used to get or set a value, with the value being created if the key was not already present in the map.

Parameters

key	the key to retrieve.

Returns: a reference to the value associated with the key.

reverse_iterator ome::files::MetadataMap::rbegin ( )

inline

Get a reverse iterator to the end of the map.

Returns: an iterator.

const_reverse_iterator ome::files::MetadataMap::rbegin ( ) const

inline

Get a constant reverse iterator to the end of the map.

Returns: an iterator.

reverse_iterator ome::files::MetadataMap::rend ( )

inline

Get a reverse iterator to the beginning of the map.

Returns: an iterator.

const_reverse_iterator ome::files::MetadataMap::rend ( ) const

inline

Get a constant reverse iterator to the beginning of the map.

Returns: an iterator.

void ome::files::MetadataMap::set	(	const key_type &	key,
		const value_type &	value
	)

inline

Add a key-value pair to the map.

Note: If a key by the same already exists in the map, it will be removed and replaced.

Parameters

key	the key name.
value	the abstract value.

References end(), erase(), find(), and insert().

Referenced by ome::files::tiff::getCoreMetadata(), ome::files::getOriginalMetadata(), ome::files::detail::MetadataMapFlattenVisitor::operator()(), and ome::files::detail::FormatReader::setId().

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template<typename T >

void ome::files::MetadataMap::set	(	const key_type &	key,
		const T &	value
	)

inline

Add a key-value pair to the map.

Note: If a key by the same already exists in the map, it will be removed and replaced.

Parameters

key	the key name.
value	the value.

size_type ome::files::MetadataMap::size ( ) const

inline

Get the size of the map.

Note that vectors are counted as a single item; child elements are not included.

Returns: the number of elements.

The documentation for this class was generated from the following file:

ome/files/MetadataMap.h

Classes

Public Types

Public Member Functions

Private Types

Private Attributes

Detailed Description

Member Function Documentation