Base class for entries in a QgsAbstractContentCache. More...

#include <qgsabstractcontentcache.h>

Public Member Functions
	QgsAbstractContentCacheEntry (const QgsAbstractContentCacheEntry &rh)=delete
	QgsAbstractContentCacheEntry cannot be copied.

	QgsAbstractContentCacheEntry (const QString &path)
	Constructor for QgsAbstractContentCacheEntry for an entry relating to the specified path.

virtual	~QgsAbstractContentCacheEntry ()=default

virtual int	dataSize () const =0
	Returns the memory usage in bytes for the entry.

virtual void	dump () const =0
	Dumps debugging strings containing the item's properties.

QgsAbstractContentCacheEntry &	operator= (const QgsAbstractContentCacheEntry &rh)=delete
	QgsAbstractContentCacheEntry cannot be copied.

bool	operator== (const QgsAbstractContentCacheEntry &other) const

Public Attributes
QDateTime	fileModified
	Timestamp when file was last modified.

QElapsedTimer	fileModifiedLastCheckTimer
	Time since last check of file modified date.

int	mFileModifiedCheckTimeout = 30000
	Timeout before re-checking whether the file modified date has changed.

QgsAbstractContentCacheEntry *	nextEntry = nullptr
	Entries are kept on a linked list, sorted by last access.

QString	path
	Represents the absolute path to a file, a remote URL, or a base64 encoded string.

QgsAbstractContentCacheEntry *	previousEntry = nullptr
	Entries are kept on a linked list, sorted by last access.

Protected Member Functions
virtual bool	isEqual (const QgsAbstractContentCacheEntry *other) const =0
	Tests whether this entry matches another entry.

Detailed Description

Base class for entries in a QgsAbstractContentCache.

Subclasses must take care to correctly implement the isEqual() method, applying their own logic for testing extra cache properties (e.g. image size for an image-based cache).

Since: QGIS 3.6

Definition at line 51 of file qgsabstractcontentcache.h.

Constructor & Destructor Documentation

◆ QgsAbstractContentCacheEntry() [1/2]

QgsAbstractContentCacheEntry::QgsAbstractContentCacheEntry ( const QString & path )

Constructor for QgsAbstractContentCacheEntry for an entry relating to the specified path.

Definition at line 24 of file qgsabstractcontentcache.cpp.

◆ ~QgsAbstractContentCacheEntry()

virtual QgsAbstractContentCacheEntry::~QgsAbstractContentCacheEntry ( )

virtualdefault

◆ QgsAbstractContentCacheEntry() [2/2]

QgsAbstractContentCacheEntry::QgsAbstractContentCacheEntry ( const QgsAbstractContentCacheEntry & rh )

delete

QgsAbstractContentCacheEntry cannot be copied.

Member Function Documentation

◆ dataSize()

virtual int QgsAbstractContentCacheEntry::dataSize ( ) const

pure virtual

Returns the memory usage in bytes for the entry.

◆ dump()

virtual void QgsAbstractContentCacheEntry::dump ( ) const

pure virtual

Dumps debugging strings containing the item's properties.

For testing purposes only.

◆ isEqual()

virtual bool QgsAbstractContentCacheEntry::isEqual ( const QgsAbstractContentCacheEntry * other ) const

protectedpure virtual

Tests whether this entry matches another entry.

Subclasses must take care to check that the type of other is of a matching class, and then test extra cache-specific properties, such as image size.

◆ operator=()

QgsAbstractContentCacheEntry & QgsAbstractContentCacheEntry::operator= ( const QgsAbstractContentCacheEntry & rh )

delete

QgsAbstractContentCacheEntry cannot be copied.

◆ operator==()

bool QgsAbstractContentCacheEntry::operator== ( const QgsAbstractContentCacheEntry & other ) const

inline

Definition at line 93 of file qgsabstractcontentcache.h.

Member Data Documentation

◆ fileModified

QDateTime QgsAbstractContentCacheEntry::fileModified

Timestamp when file was last modified.

Definition at line 73 of file qgsabstractcontentcache.h.

◆ fileModifiedLastCheckTimer

QElapsedTimer QgsAbstractContentCacheEntry::fileModifiedLastCheckTimer

Time since last check of file modified date.

Definition at line 76 of file qgsabstractcontentcache.h.

◆ mFileModifiedCheckTimeout

int QgsAbstractContentCacheEntry::mFileModifiedCheckTimeout = 30000

Timeout before re-checking whether the file modified date has changed.

Definition at line 79 of file qgsabstractcontentcache.h.

◆ nextEntry

QgsAbstractContentCacheEntry* QgsAbstractContentCacheEntry::nextEntry = nullptr

Entries are kept on a linked list, sorted by last access.

This point refers to the next entry in the cache.

Definition at line 85 of file qgsabstractcontentcache.h.

◆ path

QString QgsAbstractContentCacheEntry::path

Represents the absolute path to a file, a remote URL, or a base64 encoded string.

Definition at line 70 of file qgsabstractcontentcache.h.

◆ previousEntry

QgsAbstractContentCacheEntry* QgsAbstractContentCacheEntry::previousEntry = nullptr