org.dspace.app.mediafilter

Class ImageMagickThumbnailFilter

java.lang.Object

org.dspace.app.mediafilter.MediaFilter

org.dspace.app.mediafilter.ImageMagickThumbnailFilter

All Implemented Interfaces:

FormatFilter

Direct Known Subclasses:

ImageMagickImageThumbnailFilter, ImageMagickPdfThumbnailFilter

public abstract class ImageMagickThumbnailFilter
extends MediaFilter

Filter image bitstreams, scaling the image to be within the bounds of thumbnail.maxwidth, thumbnail.maxheight, the size we want our thumbnail to be no bigger than. Creates only JPEGs.

Constructor Summary

Constructors

Constructor and Description
ImageMagickThumbnailFilter()

Method Summary

Methods

Modifier and Type	Method and Description
java.lang.String	getBundleName()
java.lang.String	getDescription()
java.lang.String	getFilteredName(java.lang.String oldFilename) Get a filename for a newly created filtered bitstream
java.lang.String	getFormatString()
static java.io.File	getImageFile(java.io.File f, int page)
static java.io.File	getThumbnailFile(java.io.File f)
static java.io.File	inputStreamToTempFile(java.io.InputStream source, java.lang.String prefix, java.lang.String suffix)
boolean	preProcessBitstream(Context c, Item item, Bitstream source) Perform any pre-processing of the source bitstream *before* the actual filtering takes place in MediaFilterManager.processBitstream().

Methods inherited from class org.dspace.app.mediafilter.MediaFilter

postProcessBitstream

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.dspace.app.mediafilter.FormatFilter

getDestinationStream

Constructor Detail

ImageMagickThumbnailFilter

public ImageMagickThumbnailFilter()

Method Detail

getFilteredName

public java.lang.String getFilteredName(java.lang.String oldFilename)

Description copied from interface: FormatFilter

Get a filename for a newly created filtered bitstream

Parameters:

oldFilename - name of source bitstream

Returns:

filename generated by the filter - for example, document.pdf becomes document.pdf.txt

getBundleName

public java.lang.String getBundleName()

Returns:

String bundle name

getFormatString

public java.lang.String getFormatString()

Returns:

String bitstreamformat

getDescription

public java.lang.String getDescription()

Returns:

String bitstreamDescription

inputStreamToTempFile

public static java.io.File inputStreamToTempFile(java.io.InputStream source,
                                 java.lang.String prefix,
                                 java.lang.String suffix)
                                          throws java.io.IOException

Throws:

java.io.IOException

getThumbnailFile

public static java.io.File getThumbnailFile(java.io.File f)
                                     throws java.io.IOException,
                                            java.lang.InterruptedException,
                                            org.im4java.core.IM4JavaException

Throws:

java.io.IOException

java.lang.InterruptedException

org.im4java.core.IM4JavaException

getImageFile

public static java.io.File getImageFile(java.io.File f,
                        int page)
                                 throws java.io.IOException,
                                        java.lang.InterruptedException,
                                        org.im4java.core.IM4JavaException

Throws:

java.io.IOException

java.lang.InterruptedException

org.im4java.core.IM4JavaException

preProcessBitstream

public boolean preProcessBitstream(Context c,
                          Item item,
                          Bitstream source)
                            throws java.lang.Exception

Description copied from class: MediaFilter

Perform any pre-processing of the source bitstream *before* the actual filtering takes place in MediaFilterManager.processBitstream().

Return true if pre-processing is successful (or no pre-processing is necessary). Return false if bitstream should be skipped for any reason.

Specified by:

preProcessBitstream in interface FormatFilter

Overrides:

preProcessBitstream in class MediaFilter

Parameters:

c - context

item - item containing bitstream to process

source - source bitstream to be processed

Returns:

true if bitstream processing should continue, false if this bitstream should be skipped

Throws:

java.lang.Exception