Add DecodeParametersInto method to Codec.

pkg/api/meta/restmapper_test.go

@@ -19,6 +19,7 @@ package meta
 import (
 	"errors"
 	"io"
+	"net/url"
 	"testing"
 
 	"k8s.io/kubernetes/pkg/api/unversioned"
@@ -51,6 +52,10 @@ func (fakeCodec) DecodeIntoWithSpecifiedVersionKind([]byte, runtime.Object, stri
 	return nil
 }
 
+func (fakeCodec) DecodeParametersInto(parameters url.Values, obj runtime.Object) error {
+	return nil
+}
+
 type fakeConvertor struct{}
 
 func (fakeConvertor) Convert(in, out interface{}) error {

pkg/apiserver/resthandler.go

@@ -147,7 +147,20 @@ func getRequestOptions(req *restful.Request, scope RequestScope, kind string, su
 		newQuery[subpathKey] = []string{req.PathParameter("path")}
 		query = newQuery
 	}
-	return queryToObject(query, scope, kind)
+	versioned, err := scope.Creater.New(scope.ServerAPIVersion, kind)
+	if err != nil {
+		// programmer error
+		return nil, err
+	}
+	if err := scope.Codec.DecodeParametersInto(query, versioned); err != nil {
+		return nil, errors.NewBadRequest(err.Error())
+	}
+	out, err := scope.Convertor.ConvertToVersion(versioned, "")
+	if err != nil {
+		// programmer error
+		return nil, err
+	}
+	return out, nil
 }
 
 // ConnectResource returns a function that handles a connect request on a rest.Storage object.
@@ -226,15 +239,23 @@ func ListResource(r rest.Lister, rw rest.Watcher, scope RequestScope, forceWatch
 		ctx := scope.ContextFunc(req)
 		ctx = api.WithNamespace(ctx, namespace)
 
-		out, err := queryToObject(req.Request.URL.Query(), scope, "ListOptions")
+		versioned, err := scope.Creater.New(scope.ServerAPIVersion, "ListOptions")
 		if err != nil {
 			errorJSON(err, scope.Codec, w)
 			return
 		}
-		opts := *out.(*api.ListOptions)
+		if err := scope.Codec.DecodeParametersInto(req.Request.URL.Query(), versioned); err != nil {
+			errorJSON(err, scope.Codec, w)
+			return
+		}
+		opts := api.ListOptions{}
+		if err := scope.Convertor.Convert(versioned, &opts); err != nil {
+			errorJSON(err, scope.Codec, w)
+			return
+		}
 
 		// transform fields
-		// TODO: queryToObject should do this.
+		// TODO: Should this be done as part of convertion?
 		fn := func(label, value string) (newLabel, newValue string, err error) {
 			return scope.Convertor.ConvertFieldLabel(scope.APIVersion, scope.Kind, label, value)
 		}
@@ -679,27 +700,6 @@ func DeleteResource(r rest.GracefulDeleter, checkBody bool, scope RequestScope,
 	}
 }
 
-// queryToObject converts query parameters into a structured internal object by
-// kind. The caller must cast the returned object to the matching internal Kind
-// to use it.
-// TODO: add appropriate structured error responses
-func queryToObject(query url.Values, scope RequestScope, kind string) (runtime.Object, error) {
-	versioned, err := scope.Creater.New(scope.ServerAPIVersion, kind)
-	if err != nil {
-		// programmer error
-		return nil, err
-	}
-	if err := scope.Convertor.Convert(&query, versioned); err != nil {
-		return nil, errors.NewBadRequest(err.Error())
-	}
-	out, err := scope.Convertor.ConvertToVersion(versioned, "")
-	if err != nil {
-		// programmer error
-		return nil, err
-	}
-	return out, nil
-}
-
 // resultFunc is a function that returns a rest result and can be run in a goroutine
 type resultFunc func() (runtime.Object, error)
 

pkg/conversion/decode.go

@@ -19,6 +19,7 @@ package conversion
 import (
 	"errors"
 	"fmt"
+	"net/url"
 
 	"github.com/ugorji/go/codec"
 )
@@ -151,3 +152,11 @@ func (s *Scheme) DecodeIntoWithSpecifiedVersionKind(data []byte, obj interface{}
 	// Version and Kind should be blank in memory.
 	return s.SetVersionAndKind("", "", obj)
 }
+
+func (s *Scheme) DecodeParametersInto(parameters url.Values, obj interface{}) error {
+	if err := s.Convert(&parameters, obj); err != nil {
+		return err
+	}
+	// TODO: Should we do any convertion here?
+	return nil
+}

pkg/registry/thirdpartyresourcedata/codec.go

@@ -21,6 +21,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
+	"net/url"
 	"strings"
 
 	"k8s.io/kubernetes/pkg/api/latest"
@@ -221,6 +222,10 @@ func (t *thirdPartyResourceDataCodec) DecodeIntoWithSpecifiedVersionKind(data []
 	return nil
 }
 
+func (t *thirdPartyResourceDataCodec) DecodeParametersInto(parameters url.Values, obj runtime.Object) error {
+	return t.delegate.DecodeParametersInto(parameters, obj)
+}
+
 const template = `{
   "kind": "%s",
   "items": [ %s ]

pkg/runtime/interfaces.go

@@ -18,6 +18,7 @@ package runtime
 
 import (
 	"io"
+	"net/url"
 )
 
 // Codec defines methods for serializing and deserializing API objects.
@@ -35,8 +36,7 @@ type Decoder interface {
 	// TODO: Remove this method?
 	DecodeIntoWithSpecifiedVersionKind(data []byte, obj Object, kind, version string) error
 
-	// TODO: Add method for processing url parameters.
-	// DecodeParametersInto(parameters url.Values, obj Object) error
+	DecodeParametersInto(parameters url.Values, obj Object) error
 }
 
 // Encoder defines methods for serializing API objects into bytes

pkg/runtime/scheme.go

@@ -480,6 +480,10 @@ func (s *Scheme) DecodeIntoWithSpecifiedVersionKind(data []byte, obj Object, ver
 	return s.raw.DecodeIntoWithSpecifiedVersionKind(data, obj, version, kind)
 }
 
+func (s *Scheme) DecodeParametersInto(parameters url.Values, obj Object) error {
+	return s.raw.DecodeParametersInto(parameters, obj)
+}
+
 // Copy does a deep copy of an API object.  Useful mostly for tests.
 func (s *Scheme) Copy(src Object) (Object, error) {
 	dst, err := s.raw.DeepCopy(src)

pkg/runtime/unstructured.go

@@ -19,6 +19,7 @@ package runtime
 import (
 	"encoding/json"
 	"fmt"
+	"net/url"
 	"reflect"
 
 	"k8s.io/kubernetes/pkg/conversion"
@@ -82,6 +83,10 @@ func (unstructuredJSONScheme) DecodeToVersion(data []byte, version string) (Obje
 	return nil, nil
 }
 
+func (unstructuredJSONScheme) DecodeParametersInto(paramaters url.Values, obj Object) error {
+	return nil
+}
+
 func (unstructuredJSONScheme) DataVersionAndKind(data []byte) (version, kind string, err error) {
 	obj := TypeMeta{}
 	if err := json.Unmarshal(data, &obj); err != nil {