com.vaadin.flow.server

Class PwaIcon

java.lang.Object

com.vaadin.flow.server.PwaIcon

All Implemented Interfaces:

Serializable

public class PwaIcon
extends Object
implements Serializable

Implementation of icons used in PWA resources. Creates the href automatically based on - baseName (the file name with path, as icons/icon.png") - width (width of icon) - height (height of icon) - (possibly) fileHash (the hashcode of image file) The href will be set as: [basename]-[width]x[height].png{?[filehash]} The trailing ?[filehash] will be added if icon cache is not controlled by service worker: cached = false Icon caching is left to the browser if it's not cached with service worker.

Since:

1.2

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	PwaIcon.Domain Place where icon belongs to (header or manifest.webmanifest).

Method Summary

Modifier and Type	Method and Description
org.jsoup.nodes.Element	asElement() Gets an Element presentation of the icon.
String	getCacheFormat() Gets the cache-string used in Google Workbox caching.
PwaIcon.Domain	getDomain() Gets the icon PwaIcon.Domain.
int	getHeight() Gets height of an icon.
String	getHref() Gets the value of the href attribute.
String	getRelHref() Return href with '/' -prefix and removed possible ?[fileHash].
String	getSizes() Gets the value of the sizes attribute.
String	getType() Gets the value of the type attribute.
int	getWidth() Gets width of an icon.
void	setImage(BufferedImage image) Sets the image presenting the icon.
boolean	shouldBeCached() Should the icon be cached by the Service Worker.
void	write(OutputStream outputStream) Writes the icon image to output stream.

Methods inherited from class java.lang.Object

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

Method Detail

asElement

public org.jsoup.nodes.Element asElement()

Gets an Element presentation of the icon.

Returns:

an Element presentation of the icon

getWidth

public int getWidth()

Gets width of an icon.

Returns:

width of an icon

getHeight

public int getHeight()

Gets height of an icon.

Returns:

height of an icon

shouldBeCached

public boolean shouldBeCached()

Should the icon be cached by the Service Worker.

Returns:

should the icon be cached by the Service Worker.

getSizes

public String getSizes()

Gets the value of the sizes attribute.

Returns:

value of the sizes attribute

getHref

public String getHref()

Gets the value of the href attribute.

Returns:

value of the href attribute

getRelHref

public String getRelHref()

Return href with '/' -prefix and removed possible ?[fileHash]. Used in matching, when serving images.

Returns:

href with '/' -prefix and removed possible ?[fileHash]

getCacheFormat

public String getCacheFormat()

Gets the cache-string used in Google Workbox caching.

Returns:

"{ url: '[href]', revision: '[fileHash' }"

getType

public String getType()

Gets the value of the type attribute.

Returns:

value of the type attribute

getDomain

public PwaIcon.Domain getDomain()

Gets the icon PwaIcon.Domain.

Returns:

the domain of the icon

setImage

public void setImage(BufferedImage image)

Sets the image presenting the icon.

Parameters:

image - the image in png format

write

public void write(OutputStream outputStream)

Writes the icon image to output stream.

Parameters:

outputStream - output stream to write the icon image to