Help with Filtering MediaFile[]

[joshuad156]

I want to do something like

MediaList = FilterByMethod(MediaList, "GetChannelNumber", "1001", false)

to exclude all media files in an array that were aired on channel 1001, for example. However, this isn't working for me, I assume because GetChannelNubmer is not a method of MediaFile. Is there a simple way to do this without iterating through the array and building a new array with just the MediaFiles I want? I'd like to do this in Studio and keep it as simple as possible, but I can't seem to find an elegant solution to this one.

[jaminben]

This works for me:

FilterByMethod(GetAllChannels(), "GetChannelNumber", "2", true)

So it only returns channel number 2.... but thats not what you want and I don't have any recordings on my test server but you maybe able to use:

FilterByMethod(MediaFiles, "GetAiringChannelNumber", "2", false)

Can't be sure though but worth a shot I guess.


EDIT

Actually that does work and I did have two recordings to try it with:

FilterByMethod(GetMediaFiles("T"), "GetAiringChannelNumber", "26", false)

Which returned one of my two recordings.

[joshuad156]

OK I feel stupid now. I have no idea why I couldn't get this to work initially, but now it's working fine. I think the fact that it's a MedaiFile and not an Airing scared me off too quickly. :-)

Perhaps it was because I used the wrong method initially. That's what I get for trying to do this at 2am!

Thanks!

[tmiranda]

Originally Posted by joshuad156

OK I feel stupid now. I have no idea why I couldn't get this to work initially, but now it's working fine. I think the fact that it's a MedaiFile and not an Airing scared me off too quickly. :-)

Generally speaking, methods that accept an Airing Object will also accept a MediaFile Object, and vice versa. The core will automatically convert between MediaFile Object and Airing Object as needed.

Your initial example did not work because GetChannelNumber() needs a Channel Object and not a MediaFile or Airing.

[joshuad156]

Originally Posted by tmiranda

Generally speaking, methods that accept an Airing Object will also accept a MediaFile Object, and vice versa. The core will automatically convert between MediaFile Object and Airing Object as needed.

This is REALLY useful information to know! Reading through the API I don't remember seeing anything hinting at this. Thanks for that tip. I'm certain it will come in handy in the future.

[Opus4]

Originally Posted by joshuad156

This is REALLY useful information to know! Reading through the API I don't remember seeing anything hinting at this. Thanks for that tip. I'm certain it will come in handy in the future.

BTW: for future reference, this info is in the API docs and in the Studio PDF manual.

The docs for the two API calls shows these details for the return values and parameters:

public java.lang.String GetChannelNumber(sage.Channel Channel)
public java.lang.String GetAiringChannelNumber(sage.Airing Airing)

They both return strings, but one takes a Channel object parameter while the other needs an Airing.

SageTV's automatic conversion from one data type to another, when possible, is covered in the Studio manual on pages 16-17, including the example of converting Airing <--> MediaFile. If you haven't already read through the Studio manual and gone through the tutorials, you should do so.

- Andy

[tmiranda]

Originally Posted by Opus4

SageTV's automatic conversion from one data type to another, when possible, is covered in the Studio manual on pages 16-17, including the example of converting Airing <--> MediaFile.

Yes. It's also covered in the API JavaDocs if you read the first few paragraphs that describe the class.