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classes.go
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classes.go
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/*
* Copyright 2019 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package controller
import (
"strings"
"github.com/gardener/controller-manager-library/pkg/logger"
"github.com/gardener/controller-manager-library/pkg/resources"
"github.com/gardener/controller-manager-library/pkg/utils"
)
func ClassesFilter(classes *Classes) resources.ObjectFilter {
return func(obj resources.Object) bool {
return classes.IsResponsibleFor(nil, obj)
}
}
type Classes struct {
classes utils.StringSet
main string
def string
annotation string
}
func NewClassesByOption(c Interface, opt string, anno string, def string) *Classes {
opt, _ = c.GetStringOption(opt)
return NewClasses(c, opt, anno, def)
}
func NewClasses(logger logger.LogContext, value string, anno string, def string) *Classes {
classes := newClasses(value, anno, def, def)
if logger != nil {
logger.Infof("responsible for classes: %s (%s)", classes.Main(), classes)
}
return classes
}
func NewTargetClassesByOption(c Interface, opt string, anno string, classes *Classes) *Classes {
opt, _ = c.GetStringOption(opt)
return NewTargetClasses(c, opt, anno, classes, classes.Default())
}
func NewTargetClasses(c Interface, value string, anno string, classes *Classes, def string) *Classes {
if value == "" {
if !classes.Contains(def) || classes.Main() != def {
value = classes.Main()
}
}
tclasses := newClasses(value, anno, def, def)
if c != nil {
c.Infof("target classes : %s (%s)", tclasses.Main(), tclasses)
}
return tclasses
}
func newClasses(classes string, anno string, maindef, def string) *Classes {
c := &Classes{classes: utils.StringSet{}, annotation: anno, def: def}
if classes == "" {
c.main = maindef
c.classes.Add(c.main)
} else {
c.classes.AddAllSplitted(classes)
index := strings.Index(classes, ",")
if index < 0 {
c.main = strings.ToLower(strings.TrimSpace(classes))
} else {
c.main = strings.ToLower(strings.TrimSpace(classes[:index]))
}
}
return c
}
func (this *Classes) String() string {
return this.classes.String()
}
func (this *Classes) IsDefault() bool {
return this.main == this.def
}
func (this *Classes) Main() string {
return this.main
}
func (this *Classes) Default() string {
return this.def
}
func (this *Classes) Size() int {
return len(this.classes)
}
func (this *Classes) Classes() utils.StringSet {
return this.classes.Copy()
}
func (this *Classes) Contains(class string) bool {
return this.classes.Contains(class)
}
func (this *Classes) IsResponsibleFor(logger logger.LogContext, obj resources.Object) bool {
oclass := obj.GetAnnotations()[this.annotation]
if oclass == "" {
oclass = this.def
}
if !this.classes.Contains(oclass) {
if logger != nil {
logger.Debugf("%s: annotated dns class %q does not match specified class set %s -> skip ",
obj.ObjectName(), oclass, this.classes)
}
return false
}
return true
}