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71 lines
1.7 KiB
71 lines
1.7 KiB
/*
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* MinIO Cloud Storage, (C) 2018 MinIO, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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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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