Class ImageLoaderCache

java.lang.Object

java.util.Dictionary<String,Image>

nl.siegmann.epublib.viewer.ImageLoaderCache

class ImageLoaderCache
extends Dictionary<String,Image>

This class is a trick to get the JEditorKit to load its images from the epub file instead of from the given url. This class is installed as the JEditorPane's image cache. Whenever it is requested an image it will try to load that image from the epub. Can be shared by multiple documents but can only be used by one document at the time because of the currentFolder issue.

Field Summary

Fields

Modifier and Type	Field	Description
private Book	book
private Map<String,Image>	cache
private String	currentFolder
static final String	IMAGE_URL_PREFIX
private static final org.slf4j.Logger	log
private Navigator	navigator

Constructor Summary

Constructors

Constructor	Description
ImageLoaderCache(Navigator navigator)

Method Summary

Modifier and Type	Method	Description
void	clear()	Clears the image cache.
private Image	createImage(Resource imageResource)	Create an Image from the data of the given resource.
Enumeration<Image>	elements()
Image	get(Object key)
private String	getResourceHref(String requestUrl)
void	initBook(Book book)
void	initImageLoader(HTMLDocument document)
boolean	isEmpty()
Enumeration<String>	keys()
Image	put(String key, Image value)
Image	remove(Object key)
void	setContextResource(Resource resource)
int	size()
String	toString()

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Details

IMAGE_URL_PREFIX

public static final String IMAGE_URL_PREFIX

See Also:

• Constant Field Values

log

private static final org.slf4j.Logger log

cache

private Map<String,Image> cache

book

private Book book

currentFolder

private String currentFolder

navigator

private Navigator navigator

Constructor Details

ImageLoaderCache

public ImageLoaderCache(Navigator navigator)

Method Details

initBook

public void initBook(Book book)

setContextResource

public void setContextResource(Resource resource)

initImageLoader

public void initImageLoader(HTMLDocument document)

getResourceHref

private String getResourceHref(String requestUrl)

createImage

private Image createImage(Resource imageResource)

Create an Image from the data of the given resource.

Parameters:

imageResource -

Returns:

get

public Image get(Object key)

Specified by:

get in class Dictionary<String,Image>

size

public int size()

Specified by:

size in class Dictionary<String,Image>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in class Dictionary<String,Image>

keys

public Enumeration<String> keys()

Specified by:

keys in class Dictionary<String,Image>

elements

public Enumeration<Image> elements()

Specified by:

elements in class Dictionary<String,Image>

put

public Image put(String key,
 Image value)

Specified by:

put in class Dictionary<String,Image>

remove

public Image remove(Object key)

Specified by:

remove in class Dictionary<String,Image>

clear

public void clear()

Clears the image cache.

toString

public String toString()

Overrides:

toString in class Object