istio.io/istio@v0.0.0-20240520182934-d79c90f27776/pkg/config/resource/instance.go (about)

     1  // Copyright Istio Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  // Package resource contains core abstract types for representing configuration resources.
    16  package resource
    17  
    18  import (
    19  	"istio.io/istio/pkg/config"
    20  )
    21  
    22  // Instance is the abstract representation of a versioned config resource in Istio.
    23  type Instance struct {
    24  	Metadata Metadata
    25  	Message  config.Spec
    26  	Origin   Origin
    27  }
    28  
    29  // IsEmpty returns true if the resource Instance.Message is nil.
    30  func (r *Instance) IsEmpty() bool {
    31  	return r.Message == nil
    32  }
    33  
    34  // Clone returns a deep-copy of this entry. Warning, this is expensive!
    35  func (r *Instance) Clone() *Instance {
    36  	result := &Instance{}
    37  	if r.Message != nil {
    38  		result.Message = config.DeepCopy(r.Message)
    39  	}
    40  	result.Metadata = r.Metadata.Clone()
    41  	return result
    42  }