QgsProjectMetadata Class Reference

A structured metadata store for a map layer. More...

#include <qgsprojectmetadata.h>

Inheritance diagram for QgsProjectMetadata:

Public Member Functions
	QgsProjectMetadata ()=default
	Constructor for QgsProjectMetadata.
QString	author () const
	Returns the project author string.
QgsProjectMetadata *	clone () const override
	Clones the metadata object.
void	combine (const QgsAbstractMetadataBase *other) override
	Combines the metadata from this object with the metadata from an other object.
QDateTime	creationDateTime () const
	Returns the project's creation date/timestamp.
bool	operator== (const QgsProjectMetadata &metadataOther) const
bool	readMetadataXml (const QDomElement &metadataElement) override
	Sets state from DOM document.
void	setAuthor (const QString &author)
	Sets the project author string.
void	setCreationDateTime (const QDateTime &creationDateTime)
	Sets the project's creation date/timestamp.
bool	writeMetadataXml (QDomElement &metadataElement, QDomDocument &document) const override
	Stores state in a DOM node.
Public Member Functions inherited from QgsAbstractMetadataBase
virtual	~QgsAbstractMetadataBase ()=default
QString	abstract () const
	Returns a free-form description of the resource.
void	addContact (const QgsAbstractMetadataBase::Contact &contact)
	Adds an individual contact to the existing contacts.
void	addHistoryItem (const QString &text)
	Adds a single history text to the end of the existing history list.
void	addKeywords (const QString &vocabulary, const QStringList &keywords)
	Adds a list of descriptive keywords for a specified vocabulary.
void	addLink (const QgsAbstractMetadataBase::Link &link)
	Adds an individual link to the existing links.
QStringList	categories () const
	Returns categories of the resource.
QgsAbstractMetadataBase::ContactList	contacts () const
	Returns a list of contact persons or entities associated with the resource.
QDateTime	dateTime (Qgis::MetadataDateType type) const
	Returns the date for the specified date type.
QStringList	history () const
	Returns a freeform description of the history or lineage of the resource.
QString	identifier () const
	A reference, URI, URL or some other mechanism to identify the resource.
QgsAbstractMetadataBase::KeywordMap	keywords () const
	Returns the keywords map, which is a set of descriptive keywords associated with the resource.
QStringList	keywords (const QString &vocabulary) const
	Returns a list of keywords for the specified vocabulary.
QStringList	keywordVocabularies () const
	Returns a list of keyword vocabularies contained in the metadata.
QString	language () const
	Returns the human language associated with the resource.
QgsAbstractMetadataBase::LinkList	links () const
	Returns a list of online resources associated with the resource.
QString	parentIdentifier () const
	A reference, URI, URL or some other mechanism to identify the parent resource that this resource is a part (child) of.
bool	removeKeywords (const QString &vocabulary)
	Remove a vocabulary from the list.
void	setAbstract (const QString &abstract)
	Sets a free-form abstract (description) of the resource.
void	setCategories (const QStringList &categories)
	Sets categories of the resource.
void	setContacts (const QgsAbstractMetadataBase::ContactList &contacts)
	Sets the list of contacts or entities associated with the resource.
void	setDateTime (Qgis::MetadataDateType type, QDateTime date)
	Sets a date value for the specified date type.
void	setHistory (const QStringList &history)
	Sets the freeform description of the history or lineage of the resource.
void	setIdentifier (const QString &identifier)
	Sets the reference, URI, URL or some other mechanism to identify the resource.
void	setKeywords (const QgsAbstractMetadataBase::KeywordMap &keywords)
	Sets the keywords map, which is a set of descriptive keywords associated with the resource.
void	setLanguage (const QString &language)
	Sets the human language associated with the resource.
void	setLinks (const QgsAbstractMetadataBase::LinkList &links)
	Sets the list of online resources associated with the resource.
void	setParentIdentifier (const QString &parentIdentifier)
	Sets a reference, URI, URL or some other mechanism to identify the parent resource that this resource is a part (child) of.
void	setTitle (const QString &title)
	Sets the human readable title (name) of the resource, typically displayed in search results.
void	setType (const QString &type)
	Sets the type (nature) of the resource.
QString	title () const
	Returns the human readable name of the resource, typically displayed in search results.
QString	type () const
	Returns the nature of the resource.

Additional Inherited Members
Public Types inherited from QgsAbstractMetadataBase
typedef QList< QgsAbstractMetadataBase::Contact >	ContactList
	A list of contacts.
typedef QMap< QString, QStringList >	KeywordMap
	Map of vocabulary string to keyword list.
typedef QList< QgsAbstractMetadataBase::Link >	LinkList
	A list of links.
Protected Member Functions inherited from QgsAbstractMetadataBase
	QgsAbstractMetadataBase ()=default
	Constructor for QgsAbstractMetadataBase.
bool	equals (const QgsAbstractMetadataBase &other) const
	Tests whether the common metadata fields in this object are equal to other.
Protected Attributes inherited from QgsAbstractMetadataBase
QString	mAbstract
QgsAbstractMetadataBase::ContactList	mContacts
QMap< Qgis::MetadataDateType, QDateTime >	mDates
	Metadata dates.
QStringList	mHistory
QString	mIdentifier
QgsAbstractMetadataBase::KeywordMap	mKeywords
	Keywords map.
QString	mLanguage
QgsAbstractMetadataBase::LinkList	mLinks
QString	mParentIdentifier
QString	mTitle
QString	mType

Detailed Description

A structured metadata store for a map layer.

QgsProjectMetadata handles storage and management of the metadata for a QgsProject. This class is an internal QGIS format with a common metadata structure, which allows for code to access the metadata properties for projects in a uniform way.

The metadata store is designed to be compatible with the Dublin Core metadata specifications, and will be expanded to allow compatibility with ISO specifications in future releases. However, the QGIS internal schema does not represent a superset of all existing metadata schemas and accordingly conversion from specific metadata formats to QgsProjectMetadata may result in a loss of information.

This class is designed to follow the specifications detailed in the schema definition available at resources/qgis-project-metadata.xsd within the QGIS source code.

Metadata can be validated through the use of QgsLayerMetadataValidator subclasses. E.g. validating against the native QGIS metadata schema can be performed using QgsNativeProjectMetadataValidator.

Since

QGIS 3.2

Definition at line 53 of file qgsprojectmetadata.h.

Constructor & Destructor Documentation

QgsProjectMetadata()

QgsProjectMetadata::QgsProjectMetadata ( )

default

Constructor for QgsProjectMetadata.

Member Function Documentation

author()

QString QgsProjectMetadata::author

(

)

const

Returns the project author string.

See also

setAuthor()

Definition at line 84 of file qgsprojectmetadata.cpp.

clone()

QgsProjectMetadata * QgsProjectMetadata::clone ( ) const

overridevirtual

Clones the metadata object.

Since

QGIS 3.2

Implements QgsAbstractMetadataBase.

Definition at line 79 of file qgsprojectmetadata.cpp.

combine()

void QgsProjectMetadata::combine ( const QgsAbstractMetadataBase *  other )

overridevirtual

Combines the metadata from this object with the metadata from an other object.

Any existing values in this object will be overwritten by non-empty values from other.

Since

QGIS 3.20

Reimplemented from QgsAbstractMetadataBase.

Definition at line 62 of file qgsprojectmetadata.cpp.

creationDateTime()

QDateTime QgsProjectMetadata::creationDateTime

(

)

const

Returns the project's creation date/timestamp.

See also

setCreationDateTime()

Definition at line 94 of file qgsprojectmetadata.cpp.

operator==()

bool QgsProjectMetadata::operator==

(

const QgsProjectMetadata &

metadataOther

)

const

Definition at line 73 of file qgsprojectmetadata.cpp.

readMetadataXml()

bool QgsProjectMetadata::readMetadataXml ( const QDomElement &  metadataElement )

overridevirtual

Sets state from DOM document.

Parameters

metadataElement

The DOM element corresponding to `‘resourceMetadata’' tag

Returns

true if successful

Subclasses which override this method should take care to also call the base class method in order to read common metadata properties.

Reimplemented from QgsAbstractMetadataBase.

Definition at line 22 of file qgsprojectmetadata.cpp.

setAuthor()

void QgsProjectMetadata::setAuthor

(

const QString &

author

)

Sets the project author string.

See also

author()

Definition at line 89 of file qgsprojectmetadata.cpp.

setCreationDateTime()

void QgsProjectMetadata::setCreationDateTime

(

const QDateTime &

creationDateTime

)

Sets the project's creation date/timestamp.

See also

creationDateTime()

Definition at line 99 of file qgsprojectmetadata.cpp.

writeMetadataXml()

bool QgsProjectMetadata::writeMetadataXml ( QDomElement &  metadataElement, QDomDocument &  document  ) const

overridevirtual

Stores state in a DOM node.

Parameters

metadataElement	is a DOM element corresponding to `‘resourceMetadata’' tag
document	is a the DOM document being written

Returns

true if successful

Subclasses which override this method should take care to also call the base class method in order to write common metadata properties.

Reimplemented from QgsAbstractMetadataBase.

Definition at line 43 of file qgsprojectmetadata.cpp.

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

• /build/qgis-3.36.0+99sid/src/core/metadata/qgsprojectmetadata.h
• /build/qgis-3.36.0+99sid/src/core/metadata/qgsprojectmetadata.cpp