set Space Logo via Confluence plugin in Java

[Deleted user]

Hello guys,

I am wondering if there is an opportunity to, set the Space Logo in Java (confluence plugin). I already have an upload button in my wizard, but I don't know where to find the uploaded file. The Upload Button, is created in the soy file: 

<form class="aui">
    <fieldset>
        <legend>
            <span>
                File upload
            </span>
        </legend>
        <div class="field-group">
            <label for="file-upload-example">
                Upload file
            </label>
            <context-provider class=""/>
        </div>
    </fieldset>
</form>

Can someone please, tell me where and how I can apply this file to my Space Logo, through java.

NOTE: Not much experienced developer, so it would be nice to explain it so that even I can understand it.