requestor parameter in VirtualFile operations

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All write operations in VirtualFile need a "requestor" parameter, from the document I know it should be the caller of the operation and it could be anything but null (null has special meaning).

I use my class.this as the requestor, it works, anyway I still don't understand what it should be in most case and when it will be used in IDEA.

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Peter Gromov
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It's just some user data to pass with the change. Some listeners use it to make decisions. There are 2 special values:

  • null for refresh events
  • "instanceof SavingRequestor" for save events

Everything else is at your discretion. Most clients pass "this" in it, just because they have to pass something.

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Thank you Peter.

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