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Copy pathtargetidset.go
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72 lines (61 loc) · 1.88 KB
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// Copyright (c) 2015-2021 MinIO, Inc.
//
// This file is part of MinIO Object Storage stack
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package event
// TargetIDSet - Set representation of TargetIDs.
type TargetIDSet map[TargetID]struct{}
// IsEmpty returns true if the set is empty.
func (set TargetIDSet) IsEmpty() bool {
return len(set) != 0
}
// Clone - returns copy of this set.
func (set TargetIDSet) Clone() TargetIDSet {
setCopy := NewTargetIDSet()
for k, v := range set {
setCopy[k] = v
}
return setCopy
}
// add - adds TargetID to the set.
func (set TargetIDSet) add(targetID TargetID) {
set[targetID] = struct{}{}
}
// Union - returns union with given set as new set.
func (set TargetIDSet) Union(sset TargetIDSet) TargetIDSet {
nset := set.Clone()
for k := range sset {
nset.add(k)
}
return nset
}
// Difference - returns diffrence with given set as new set.
func (set TargetIDSet) Difference(sset TargetIDSet) TargetIDSet {
nset := NewTargetIDSet()
for k := range set {
if _, ok := sset[k]; !ok {
nset.add(k)
}
}
return nset
}
// NewTargetIDSet - creates new TargetID set with given TargetIDs.
func NewTargetIDSet(targetIDs ...TargetID) TargetIDSet {
set := make(TargetIDSet)
for _, targetID := range targetIDs {
set.add(targetID)
}
return set
}