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 generic

import (
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"

)

type ObjectSelectorProvider interface {
	// GetObjectSelector gets the webhook ObjectSelector field.
	GetParsedObjectSelector() (labels.Selector, error)
}

// Matcher decides if a request selected by the ObjectSelector.
type Matcher struct {
}

func matchObject(obj runtime.Object, selector labels.Selector) bool {
	if obj == nil {
		return false
	}
	accessor, err := meta.Accessor(obj)
	if err != nil {

	KeyPem   []byte
	CABundle []byte
}

type Watcher struct {
	mutex     sync.RWMutex
	bundle    KeyCertBundle
	watcherID int32
	watchers  map[int32]chan struct{}
}

func NewWatcher() *Watcher {
	return &Watcher{
		watchers: make(map[int32]chan struct{}),
	}
}

// AddWatcher returns channel to receive the updated items.
func (w *Watcher) AddWatcher() (int32, chan struct{}) {
	ch := make(chan struct{}, 1)

Brad Fitzpatrick <******@****.***> 1436570231 -0600

     */
    void putInt(int value);

    /**
     * Feed a long value byte into the hasher.
     */
    void putLong(long value);

    /**
     * Feed a double value into the hasher.
     */
    void putDouble(double value);

    /**
     * Feed a boolean value into the hasher.
     */
    void putBoolean(boolean value);

    /**
     * Feed a string into the hasher.
     */

// simplifying injector based controllers.
type WatcherMulticast struct {
	handlers []func(*Config, string) error
	impl     Watcher
	Get      func() WebhookConfig
}

func NewMulticast(impl Watcher, getter func() WebhookConfig) *WatcherMulticast {
	res := &WatcherMulticast{
		impl: impl,
		Get:  getter,
	}
	impl.SetHandler(func(c *Config, s string) error {

gopher.png...

	return v.Expression
}

func (v *MatchCondition) ReturnTypes() []*cel.Type {
	return []*cel.Type{cel.BoolType}
}

var _ Matcher = &matcher{}

// matcher evaluates compiled cel expressions and determines if they match the given request or not
type matcher struct {
	filter      celplugin.Filter
	failPolicy  v1.FailurePolicyType
	matcherType string
	matcherKind string
	objectName  string
}

func NewFixedWatcher(mesh *meshconfig.MeshConfig) Watcher {
	iw := internalWatcher{}
	iw.MeshConfig.Store(mesh)
	return &iw
}

// NewFileWatcher creates a new Watcher for changes to the given mesh config file. Returns an error
// if the given file does not exist or failed during parsing.
func NewFileWatcher(fileWatcher filewatcher.FileWatcher, filename string, multiWatch bool) (Watcher, error) {

	}

	// Initialize watcher, fall back to no-op
	var (
		eventsCh chan fsnotify.Event
		errorCh  chan error
		watcher  watchAddRemover
	)
	if w, err := fsnotify.NewWatcher(); err != nil {
		errorHandler(fmt.Errorf("error creating file watcher, falling back to poll at interval %s: %w", pollInterval, err))
		watcher = noopWatcher{}
	} else {
		watcher = w
		eventsCh = w.Events
		errorCh = w.Errors