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https://issues.apache.org/jira/browse/PDFBOX-2591?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14268264#comment-14268264
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John Hewson commented on PDFBOX-2591:
-------------------------------------
Why would you want to modify it? We already support of the PDF filters.
> Allow using custom Filters
> --------------------------
>
> Key: PDFBOX-2591
> URL: https://issues.apache.org/jira/browse/PDFBOX-2591
> Project: PDFBox
> Issue Type: Improvement
> Reporter: Daniel Bonniot de Ruisselet
> Labels: patch
> Fix For: 2.0.0
>
> Attachments: PDFBOX-2591.patch
>
>
> It seems that currently FilterFactory has a hard-coded list of filters, and
> that there is no way for clients to modify it. This is problematic if you
> want to replace a built-in Filter by a custom one.
> Would this patch be appropriate?
> {noformat}
> Index: pdfbox/src/main/java/org/apache/pdfbox/filter/FilterFactory.java
> ===================================================================
> --- pdfbox/src/main/java/org/apache/pdfbox/filter/FilterFactory.java
> (revision 1650041)
> +++ pdfbox/src/main/java/org/apache/pdfbox/filter/FilterFactory.java
> (working copy)
> @@ -97,6 +97,17 @@
> return filter;
> }
>
> + /**
> + * Set the filter instance to be used for a given filter name.
> + * @param filterName the name of the filter to set
> + * @param filter the filter to use for that name
> + * @return the previous filter that was used for that name
> + */
> + public Filter setFilter(COSName filterName, Filter filter) {
> + Filter previous = filters.put(filterName, filter);
> + return previous;
> + }
> +
> // returns all available filters, for testing
> Collection<Filter> getAllFilters()
> {
> {noformat}
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