73 lines
1.9 KiB
Go
73 lines
1.9 KiB
Go
// Copyright (c) 2015-2021 MinIO, Inc.
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//
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// This file is part of MinIO Object Storage stack
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package event
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// TargetIDSet - Set representation of TargetIDs.
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type TargetIDSet map[TargetID]struct{}
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// IsEmpty returns true if the set is empty.
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func (set TargetIDSet) IsEmpty() bool {
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return len(set) != 0
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}
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// Clone - returns copy of this set.
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func (set TargetIDSet) Clone() TargetIDSet {
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setCopy := NewTargetIDSet()
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for k, v := range set {
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setCopy[k] = v
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}
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return setCopy
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}
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// add - adds TargetID to the set.
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func (set TargetIDSet) add(targetID TargetID) {
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set[targetID] = struct{}{}
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}
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// Union - returns union with given set as new set.
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func (set TargetIDSet) Union(sset TargetIDSet) TargetIDSet {
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nset := set.Clone()
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for k := range sset {
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nset.add(k)
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}
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return nset
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}
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// Difference - returns diffrence with given set as new set.
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func (set TargetIDSet) Difference(sset TargetIDSet) TargetIDSet {
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nset := NewTargetIDSet()
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for k := range set {
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if _, ok := sset[k]; !ok {
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nset.add(k)
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}
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}
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return nset
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}
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// NewTargetIDSet - creates new TargetID set with given TargetIDs.
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func NewTargetIDSet(targetIDs ...TargetID) TargetIDSet {
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set := make(TargetIDSet)
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for _, targetID := range targetIDs {
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set.add(targetID)
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}
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return set
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}
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