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Exiv2
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Abstract base class defining the Key of a metadatum. Keys are used to identify and group metadata. More...
#include <metadatum.hpp>
Public Types | |
| typedef std::auto_ptr< Key > | AutoPtr |
| Shortcut for a Key auto pointer. | |
Public Member Functions | |
Creators | |
| virtual | ~Key () |
| Destructor. | |
Accessors | |
| virtual std::string | key () const =0 |
| Return the key of the metadatum as a string. The key is of the form 'familyName.groupName.tagName'. Note however that the key is not necessarily unique, e.g., an ExifData may contain multiple metadata with the same key. More... | |
| virtual const char * | familyName () const =0 |
| Return an identifier for the type of metadata (the first part of the key) More... | |
| virtual std::string | groupName () const =0 |
| Return the name of the group (the second part of the key) More... | |
| virtual std::string | tagName () const =0 |
| Return the name of the tag (which is also the third part of the key) More... | |
| virtual std::string | tagLabel () const =0 |
| Return a label for the tag. More... | |
| virtual uint16_t | tag () const =0 |
| Return the tag number. More... | |
| AutoPtr | clone () const |
| Return an auto-pointer to a copy of itself (deep copy). The caller owns this copy and the auto-pointer ensures that it will be deleted. | |
| std::ostream & | write (std::ostream &os) const |
| Write the key to an output stream. You do not usually have to use this function; it is used for the implementation of the output operator for Key, operator<<(std::ostream &os, const Key &key). | |
Manipulators | |
| Key & | operator= (const Key &rhs) |
| Assignment operator. Protected so that it can only be used by subclasses but not directly. | |
Abstract base class defining the Key of a metadatum. Keys are used to identify and group metadata.
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pure virtual |
Return an identifier for the type of metadata (the first part of the key)
Implemented in Exiv2::IptcKey, Exiv2::XmpKey, and Exiv2::ExifKey.
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pure virtual |
Return the name of the group (the second part of the key)
Implemented in Exiv2::IptcKey, Exiv2::XmpKey, and Exiv2::ExifKey.
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pure virtual |
Return the key of the metadatum as a string. The key is of the form 'familyName.groupName.tagName'. Note however that the key is not necessarily unique, e.g., an ExifData may contain multiple metadata with the same key.
Implemented in Exiv2::IptcKey, Exiv2::XmpKey, and Exiv2::ExifKey.
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pure virtual |
Return the tag number.
Implemented in Exiv2::IptcKey, Exiv2::XmpKey, and Exiv2::ExifKey.
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pure virtual |
Return a label for the tag.
Implemented in Exiv2::IptcKey, Exiv2::XmpKey, and Exiv2::ExifKey.
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pure virtual |
Return the name of the tag (which is also the third part of the key)
Implemented in Exiv2::IptcKey, Exiv2::XmpKey, and Exiv2::ExifKey.
1.9.4
