46 lines
1.2 KiB
Go
46 lines
1.2 KiB
Go
// Copyright (C) 2021 Storj Labs, Inc.
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// See LICENSE for copying information.
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package ulfs
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import "storj.io/storj/cmd/uplinkng/ulloc"
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// filteredObjectIterator removes any iteration entries that do not begin with the filter.
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// all entries must begin with the trim string which is removed before checking for the
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// filter.
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type filteredObjectIterator struct {
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trim ulloc.Location
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filter ulloc.Location
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iter ObjectIterator
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}
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func (f *filteredObjectIterator) Next() bool {
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for {
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if !f.iter.Next() {
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return false
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}
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loc := f.iter.Item().Loc
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if !loc.HasPrefix(f.trim) {
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return false
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}
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if loc.HasPrefix(f.filter.AsDirectoryish()) || loc == f.filter {
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return true
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}
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}
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}
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func (f *filteredObjectIterator) Err() error { return f.iter.Err() }
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func (f *filteredObjectIterator) Item() ObjectInfo {
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item := f.iter.Item()
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item.Loc = item.Loc.RemovePrefix(f.trim)
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return item
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}
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// emptyObjectIterator is an objectIterator that has no objects.
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type emptyObjectIterator struct{}
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func (emptyObjectIterator) Next() bool { return false }
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func (emptyObjectIterator) Err() error { return nil }
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func (emptyObjectIterator) Item() ObjectInfo { return ObjectInfo{} }
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