René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Null Array Parameter is persisted as an Array containing a single element, which is null","articleBody":"\r\nI have a command with a non-required array parameter:\r\n\r\n```\r\n\t@Parameter(label = \"Select Bvv Windows to synchronize\", required = false)\r\n\tBvvHandle[] bvvhs;\r\n```\r\n\r\n\r\nBefore, when nothing was set, `bvvhs` was returned as a null object. Now, when `bvvhs` is not set, the parameter is set to an array of size 1, with the element being a null object.\r\n\r\nIt's a change of behaviour which breaks a few things in my code. It's probably manageable, but the current behaviour needs to be changed:\r\n\r\nreturn null is fine, returning an empty array is probably also fine, but returning a one-element array with null inside do not look good.\r\n\r\nFYI, I checked in the prefs how the parameter is remembered, and this is how it looks:\r\n\r\n![image](https://github.com/scijava/scijava-common/assets/20223054/eaae6076-2a95-43a8-928a-4136ff5b9921)\r\n\r\nI think it should be:\r\n\r\n![image](https://github.com/scijava/scijava-common/assets/20223054/3edf3f2e-3760-4165-9585-29ebba78f1ca)\r\n\r\nRelated as mentioned by @ctrueden:\r\n\r\nhttps://github.com/scijava/scijava-common/issues/450\r\nhttps://github.com/scijava/scijava-common/commit/ce135b7c9e3197a87423e9ef0e8fc58f5d400387\r\n\r\nOriginal forum thread: \r\nhttps://forum.image.sc/t/change-of-behaviour-in-scijava-parameter-table-of-size-one-with-null-object-inside-instead-of-null-object/83625/2\r\n\r\n---\r\n\r\nIt does not look like a critical issue, but it might pop here and there","author":{"url":"https://github.com/NicoKiaru","@type":"Person","name":"NicoKiaru"},"datePublished":"2023-07-13T18:18:23.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/466/scijava-common/issues/466"}