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add node about empty content filter

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Christian Schabesberger 2019-01-29 17:14:36 +01:00
parent 6194f32315
commit 0ab13c65f1
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docs/02_Concept_of_LinkHandler.md
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@ -61,6 +61,8 @@ which is used to filter by resource type like stream or playlist, and
[SortFilter](https://teamnewpipe.github.io/NewPipeExtractor/javadoc/org/schabi/newpipe/extractor/linkhandler/ListLinkHandler.html#sortFilter)
which is used to sort by name, date or view count.
__!!ATENTION!!__ Be careful when you implement content filter: No selected filter equals all filters selected. So if your get an empty content filter list in your extractor make sure you return everything. By means use if statements like this `contentFilter.contains("video") || contentFilter.isEmpty()`.
ListLinkHandler are also created by overriding the [ListLinkHandlerFactory](https://teamnewpipe.github.io/NewPipeExtractor/javadoc/org/schabi/newpipe/extractor/linkhandler/ListLinkHandlerFactory.html)
additionally to the abstract methods this factory inherits from the LinkHandlerFactory you can override
[getAvailableContentFilter()](https://teamnewpipe.github.io/NewPipeExtractor/javadoc/org/schabi/newpipe/extractor/linkhandler/ListLinkHandlerFactory.html#getAvailableContentFilter--)