Package org.omnifaces.resourcehandler

Class GraphicResource

java.lang.Object

jakarta.faces.application.ViewResource

jakarta.faces.application.Resource

org.omnifaces.resourcehandler.DynamicResource

org.omnifaces.resourcehandler.GraphicResource

public class GraphicResource
extends DynamicResource

This Resource implementation is used by the GraphicImage component.

Since:

2.0

Author:

Bauke Scholtz

Field Summary

Fields inherited from class jakarta.faces.application.Resource

COMPONENT_RESOURCE_KEY

Constructor Summary

Constructors

Constructor	Description
GraphicResource(Object content, String contentType)	Construct a new graphic resource which uses the given content as data URI.
GraphicResource(String name, String[] params, Object lastModified)	Construct a new graphic resource based on the given name, EL method parameters converted as string, and the "last modified" representation.

Method Summary

Modifier and Type	Method	Description
static GraphicResource	create(FacesContext context, ValueExpression value, String type, Object lastModified)	Create a new graphic resource based on the given value expression.
InputStream	getInputStream()
String	getRequestPath()	An override which either returns the data URI or appends the converted method parameters to the query string.
static void	registerGraphicImageBeans()	Register graphic image scoped beans discovered so far.

Methods inherited from class org.omnifaces.resourcehandler.DynamicResource

getLastModified, getResponseHeaders, getURL, setLastModified, userAgentNeedsUpdate

Methods inherited from class jakarta.faces.application.Resource

getContentType, getLibraryName, getResourceName, setContentType, setLibraryName, setResourceName, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

GraphicResource

public GraphicResource(Object content,
                       String contentType)

Construct a new graphic resource which uses the given content as data URI. This constructor is called during render time of <o:graphicImage ... dataURI="true">.

Parameters:

content - The graphic resource content, to be represented as data URI.

contentType - The graphic resource content type. If this is null, then it will be guessed based on the content type signature in the content header. So far, WEBP, JPEG, PNG, GIF, ICO, SVG, BMP and TIFF are recognized. Else if this represents the file extension, then it will be resolved based on mime mappings.

GraphicResource

public GraphicResource(String name,
                       String[] params,
                       Object lastModified)

Construct a new graphic resource based on the given name, EL method parameters converted as string, and the "last modified" representation. This constructor is called during render time of <o:graphicImage value="..." dataURI="false"> and during handling the resource request by GraphicResourceHandler.

Parameters:

name - The graphic resource name, usually representing the base and method of EL method expression.

params - The graphic resource method parameters.

lastModified - The "last modified" representation of the graphic resource, can be Long or Date, or otherwise an attempt will be made to parse it as Long.

Throws:

IllegalArgumentException - If "last modified" can not be parsed to a timestamp.

Method Detail

create

public static GraphicResource create(FacesContext context,
                                     ValueExpression value,
                                     String type,
                                     Object lastModified)

Create a new graphic resource based on the given value expression.

Parameters:

context - The involved faces context.

value - The value expression representing content to create a new graphic resource for.

type - The image type, represented as file extension. E.g. "webp", "jpg", "png", "gif", "ico", "svg", "bmp", "tiff", etc.

lastModified - The "last modified" representation of the graphic resource, can be Long or Date, or otherwise an attempt will be made to parse it as Long.

Returns:

The new graphic resource.

Throws:

IllegalArgumentException - When the "value" attribute of the given component is absent or does not represent a method expression referring an existing method taking at least one argument. Or, when the "type" attribute does not represent a valid file extension (you can add unrecognized ones as <mime-mapping> in web.xml).

getRequestPath

public String getRequestPath()

An override which either returns the data URI or appends the converted method parameters to the query string.

Overrides:

getRequestPath in class DynamicResource

getInputStream

public InputStream getInputStream()
                           throws IOException

Specified by:

getInputStream in class Resource

Throws:

IOException

registerGraphicImageBeans

public static void registerGraphicImageBeans()

Register graphic image scoped beans discovered so far.

Throws:

IllegalArgumentException - When bean method is missing.