github.com/timstclair/heapster@v0.20.0-alpha1/Godeps/_workspace/src/k8s.io/kubernetes/pkg/runtime/unstructured.go (about)

     1  /*
     2  Copyright 2015 The Kubernetes Authors All rights reserved.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package runtime
    18  
    19  import (
    20  	"encoding/json"
    21  	"fmt"
    22  	"net/url"
    23  	"reflect"
    24  
    25  	"k8s.io/kubernetes/pkg/conversion"
    26  )
    27  
    28  // UnstructuredJSONScheme is capable of converting JSON data into the Unstructured
    29  // type, which can be used for generic access to objects without a predefined scheme.
    30  var UnstructuredJSONScheme ObjectDecoder = unstructuredJSONScheme{}
    31  
    32  type unstructuredJSONScheme struct{}
    33  
    34  // Recognizes returns true for any version or kind that is specified (internal
    35  // versions are specifically excluded).
    36  func (unstructuredJSONScheme) Recognizes(version, kind string) bool {
    37  	return len(version) > 0 && len(kind) > 0
    38  }
    39  
    40  func (s unstructuredJSONScheme) Decode(data []byte) (Object, error) {
    41  	unstruct := &Unstructured{}
    42  	if err := s.DecodeInto(data, unstruct); err != nil {
    43  		return nil, err
    44  	}
    45  	return unstruct, nil
    46  }
    47  
    48  func (unstructuredJSONScheme) DecodeInto(data []byte, obj Object) error {
    49  	unstruct, ok := obj.(*Unstructured)
    50  	if !ok {
    51  		return fmt.Errorf("the unstructured JSON scheme does not recognize %v", reflect.TypeOf(obj))
    52  	}
    53  
    54  	m := make(map[string]interface{})
    55  	if err := json.Unmarshal(data, &m); err != nil {
    56  		return err
    57  	}
    58  	if v, ok := m["kind"]; ok {
    59  		if s, ok := v.(string); ok {
    60  			unstruct.Kind = s
    61  		}
    62  	}
    63  	if v, ok := m["apiVersion"]; ok {
    64  		if s, ok := v.(string); ok {
    65  			unstruct.APIVersion = s
    66  		}
    67  	}
    68  	if len(unstruct.APIVersion) == 0 {
    69  		return conversion.NewMissingVersionErr(string(data))
    70  	}
    71  	if len(unstruct.Kind) == 0 {
    72  		return conversion.NewMissingKindErr(string(data))
    73  	}
    74  	unstruct.Object = m
    75  	return nil
    76  }
    77  
    78  func (unstructuredJSONScheme) DecodeIntoWithSpecifiedVersionKind(data []byte, obj Object, kind, version string) error {
    79  	return nil
    80  }
    81  
    82  func (unstructuredJSONScheme) DecodeToVersion(data []byte, version string) (Object, error) {
    83  	return nil, nil
    84  }
    85  
    86  func (unstructuredJSONScheme) DecodeParametersInto(paramaters url.Values, obj Object) error {
    87  	return nil
    88  }
    89  
    90  func (unstructuredJSONScheme) DataVersionAndKind(data []byte) (version, kind string, err error) {
    91  	obj := TypeMeta{}
    92  	if err := json.Unmarshal(data, &obj); err != nil {
    93  		return "", "", err
    94  	}
    95  	if len(obj.APIVersion) == 0 {
    96  		return "", "", conversion.NewMissingVersionErr(string(data))
    97  	}
    98  	if len(obj.Kind) == 0 {
    99  		return "", "", conversion.NewMissingKindErr(string(data))
   100  	}
   101  	return obj.APIVersion, obj.Kind, nil
   102  }