com.jalios.jcms.policy
Interface ThumbnailPolicyFilter

All Superinterfaces:

Comparable, PluginComponent, PolicyFilter

All Known Implementing Classes:

BasicThumbnailPolicyFilter, DefaultThumbnailPolicyFilter

public interface ThumbnailPolicyFilter
extends PolicyFilter

This class allow users to customize behaviour of widgets by re-writing call-back methods.

Since:

jcms-5.5.0

Version:

$Revision: 25477 $

Author:

Jean-Philippe Encausse

Field Summary

static String

REVISION

Method Summary

boolean	createThumbnail(FileDocument doc, File dest, ImageFormat format, int maxWidth, int maxHeight, String background, boolean done) This method is a hook called by Thumbnail tag to generate a thumbnail of the given FileDocument.
boolean	createThumbnail(File src, File dest, ImageFormat format, int maxWidth, int maxHeight, String background, boolean done) This method is a hook called by Thumbnail tag to generate a thumbnail of the given source file.
boolean	createThumbnail(URL url, File dest, ImageFormat format, int maxWidth, int maxHeight, String background, boolean done) This method is a hook called by Thumbnail tag to generate a thumbnail of the given URL.
boolean	isValidImageSize(File imgFile, long width, long height, boolean jcms) Checks if the given dimension are below the limit above which we do not generate thumbnails
boolean	supportsThumbnail(FileDocument doc, boolean jcms) Returns true if a thumbnail can be generated for the given document.

Methods inherited from interface java.lang.Comparable

compareTo

Methods inherited from interface com.jalios.jcms.plugin.PluginComponent

init

Field Detail

REVISION

static final String REVISION

See Also:

Constant Field Values

Method Detail

createThumbnail

boolean createThumbnail(File src,
                        File dest,
                        ImageFormat format,
                        int maxWidth,
                        int maxHeight,
                        String background,
                        boolean done)

This method is a hook called by Thumbnail tag to generate a thumbnail of the given source file.

Parameters:

src - source file of which to create a thumbnail

dest - destination file (the thumbnail to generate)

format - the format of the file to generate as requested by the ThumbnailTag

maxWidth - the maximum width of the thumbnail to generate

maxHeight - the maximum height of the thumbnail to generate

done - the global plugin createThumbnail() status

background - the background color (eg "FFFFFF") if sets the image dimension will be set maxWidth and maxHeight

Returns:

true on success, or false if the thumbnail could not be created

See Also:

ThumbnailTag.createImageThumbnail(File, File, ImageFormat, int, int), ImageUtil.createThumbnail(File, ImageFormat, int, int)

isValidImageSize

boolean isValidImageSize(File imgFile,
                         long width,
                         long height,
                         boolean jcms)

Checks if the given dimension are below the limit above which we do not generate thumbnails

Parameters:

imgFile - the image File being checked (only used for logging)

width - the widht of the image (in pixel)

height - the heigth of the image (in pixel)

jcms - the value computed by previous policy filter or the default jcms value if no filter has been invoked yet

Returns:

true if the given dimension are valid, false otherwise

supportsThumbnail

boolean supportsThumbnail(FileDocument doc,
                          boolean jcms)

Returns true if a thumbnail can be generated for the given document. This method is called as an extension of FileDocument.supportsThumbnail().

Parameters:

doc - the FileDocument to be checked

jcms - the value computed by previous policy filter or the default jcms value if no filter has been invoked yet

Returns:

true if a thumbnail can be generated for the given document.

Since:

jcms-5.7.0

createThumbnail

boolean createThumbnail(FileDocument doc,
                        File dest,
                        ImageFormat format,
                        int maxWidth,
                        int maxHeight,
                        String background,
                        boolean done)

This method is a hook called by Thumbnail tag to generate a thumbnail of the given FileDocument.

Parameters:

doc - FileDocument of which to create a thumbnail

dest - destination file (the thumbnail to generate)

format - the format of the file to generate as requested by the ThumbnailTag

maxWidth - the maximum width of the thumbnail to generate

maxHeight - the maximum height of the thumbnail to generate

done - the global plugin createThumbnail() status

background - the background color (eg "FFFFFF") if sets the image dimension will be set maxWidth and maxHeight

Returns:

true on success, or false if the thumbnail could not be created

See Also:

ThumbnailTag.createImageThumbnail(File, File, ImageFormat, int, int), ImageUtil.createThumbnail(File, ImageFormat, int, int)

createThumbnail

boolean createThumbnail(URL url,
                        File dest,
                        ImageFormat format,
                        int maxWidth,
                        int maxHeight,
                        String background,
                        boolean done)

This method is a hook called by Thumbnail tag to generate a thumbnail of the given URL.

Parameters:

url - the URL of which to create a thumbnail

dest - destination file (the thumbnail to generate)

format - the format of the file to generate as requested by the ThumbnailTag

maxWidth - the maximum width of the thumbnail to generate

maxHeight - the maximum height of the thumbnail to generate

done - the global plugin createThumbnail() status

background - the background color (eg "FFFFFF") if sets the image dimension will be set maxWidth and maxHeight

Returns:

true on success, or false if the thumbnail could not be created

See Also:

ThumbnailTag.createImageThumbnail(File, File, ImageFormat, int, int), ImageUtil.createThumbnail(File, ImageFormat, int, int)