rebase: update to latest github.com/openshift/api version

Also vendor all dependencies.

Signed-off-by: Niels de Vos <ndevos@ibm.com>

api/vendor/k8s.io/apimachinery/pkg/conversion/converter.go

@@ -0,0 +1,225 @@
+/*
+Copyright 2014 The Kubernetes Authors.
+
+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 conversion
+
+import (
+	"fmt"
+	"reflect"
+)
+
+type typePair struct {
+	source reflect.Type
+	dest   reflect.Type
+}
+
+type NameFunc func(t reflect.Type) string
+
+var DefaultNameFunc = func(t reflect.Type) string { return t.Name() }
+
+// ConversionFunc converts the object a into the object b, reusing arrays or objects
+// or pointers if necessary. It should return an error if the object cannot be converted
+// or if some data is invalid. If you do not wish a and b to share fields or nested
+// objects, you must copy a before calling this function.
+type ConversionFunc func(a, b interface{}, scope Scope) error
+
+// Converter knows how to convert one type to another.
+type Converter struct {
+	// Map from the conversion pair to a function which can
+	// do the conversion.
+	conversionFuncs          ConversionFuncs
+	generatedConversionFuncs ConversionFuncs
+
+	// Set of conversions that should be treated as a no-op
+	ignoredUntypedConversions map[typePair]struct{}
+}
+
+// NewConverter creates a new Converter object.
+// Arg NameFunc is just for backward compatibility.
+func NewConverter(NameFunc) *Converter {
+	c := &Converter{
+		conversionFuncs:           NewConversionFuncs(),
+		generatedConversionFuncs:  NewConversionFuncs(),
+		ignoredUntypedConversions: make(map[typePair]struct{}),
+	}
+	c.RegisterUntypedConversionFunc(
+		(*[]byte)(nil), (*[]byte)(nil),
+		func(a, b interface{}, s Scope) error {
+			return Convert_Slice_byte_To_Slice_byte(a.(*[]byte), b.(*[]byte), s)
+		},
+	)
+	return c
+}
+
+// WithConversions returns a Converter that is a copy of c but with the additional
+// fns merged on top.
+func (c *Converter) WithConversions(fns ConversionFuncs) *Converter {
+	copied := *c
+	copied.conversionFuncs = c.conversionFuncs.Merge(fns)
+	return &copied
+}
+
+// DefaultMeta returns meta for a given type.
+func (c *Converter) DefaultMeta(t reflect.Type) *Meta {
+	return &Meta{}
+}
+
+// Convert_Slice_byte_To_Slice_byte prevents recursing into every byte
+func Convert_Slice_byte_To_Slice_byte(in *[]byte, out *[]byte, s Scope) error {
+	if *in == nil {
+		*out = nil
+		return nil
+	}
+	*out = make([]byte, len(*in))
+	copy(*out, *in)
+	return nil
+}
+
+// Scope is passed to conversion funcs to allow them to continue an ongoing conversion.
+// If multiple converters exist in the system, Scope will allow you to use the correct one
+// from a conversion function--that is, the one your conversion function was called by.
+type Scope interface {
+	// Call Convert to convert sub-objects. Note that if you call it with your own exact
+	// parameters, you'll run out of stack space before anything useful happens.
+	Convert(src, dest interface{}) error
+
+	// Meta returns any information originally passed to Convert.
+	Meta() *Meta
+}
+
+func NewConversionFuncs() ConversionFuncs {
+	return ConversionFuncs{
+		untyped: make(map[typePair]ConversionFunc),
+	}
+}
+
+type ConversionFuncs struct {
+	untyped map[typePair]ConversionFunc
+}
+
+// AddUntyped adds the provided conversion function to the lookup table for the types that are
+// supplied as a and b. a and b must be pointers or an error is returned. This method overwrites
+// previously defined functions.
+func (c ConversionFuncs) AddUntyped(a, b interface{}, fn ConversionFunc) error {
+	tA, tB := reflect.TypeOf(a), reflect.TypeOf(b)
+	if tA.Kind() != reflect.Pointer {
+		return fmt.Errorf("the type %T must be a pointer to register as an untyped conversion", a)
+	}
+	if tB.Kind() != reflect.Pointer {
+		return fmt.Errorf("the type %T must be a pointer to register as an untyped conversion", b)
+	}
+	c.untyped[typePair{tA, tB}] = fn
+	return nil
+}
+
+// Merge returns a new ConversionFuncs that contains all conversions from
+// both other and c, with other conversions taking precedence.
+func (c ConversionFuncs) Merge(other ConversionFuncs) ConversionFuncs {
+	merged := NewConversionFuncs()
+	for k, v := range c.untyped {
+		merged.untyped[k] = v
+	}
+	for k, v := range other.untyped {
+		merged.untyped[k] = v
+	}
+	return merged
+}
+
+// Meta is supplied by Scheme, when it calls Convert.
+type Meta struct {
+	// Context is an optional field that callers may use to pass info to conversion functions.
+	Context interface{}
+}
+
+// scope contains information about an ongoing conversion.
+type scope struct {
+	converter *Converter
+	meta      *Meta
+}
+
+// Convert continues a conversion.
+func (s *scope) Convert(src, dest interface{}) error {
+	return s.converter.Convert(src, dest, s.meta)
+}
+
+// Meta returns the meta object that was originally passed to Convert.
+func (s *scope) Meta() *Meta {
+	return s.meta
+}
+
+// RegisterUntypedConversionFunc registers a function that converts between a and b by passing objects of those
+// types to the provided function. The function *must* accept objects of a and b - this machinery will not enforce
+// any other guarantee.
+func (c *Converter) RegisterUntypedConversionFunc(a, b interface{}, fn ConversionFunc) error {
+	return c.conversionFuncs.AddUntyped(a, b, fn)
+}
+
+// RegisterGeneratedUntypedConversionFunc registers a function that converts between a and b by passing objects of those
+// types to the provided function. The function *must* accept objects of a and b - this machinery will not enforce
+// any other guarantee.
+func (c *Converter) RegisterGeneratedUntypedConversionFunc(a, b interface{}, fn ConversionFunc) error {
+	return c.generatedConversionFuncs.AddUntyped(a, b, fn)
+}
+
+// RegisterIgnoredConversion registers a "no-op" for conversion, where any requested
+// conversion between from and to is ignored.
+func (c *Converter) RegisterIgnoredConversion(from, to interface{}) error {
+	typeFrom := reflect.TypeOf(from)
+	typeTo := reflect.TypeOf(to)
+	if typeFrom.Kind() != reflect.Pointer {
+		return fmt.Errorf("expected pointer arg for 'from' param 0, got: %v", typeFrom)
+	}
+	if typeTo.Kind() != reflect.Pointer {
+		return fmt.Errorf("expected pointer arg for 'to' param 1, got: %v", typeTo)
+	}
+	c.ignoredUntypedConversions[typePair{typeFrom, typeTo}] = struct{}{}
+	return nil
+}
+
+// Convert will translate src to dest if it knows how. Both must be pointers.
+// If no conversion func is registered and the default copying mechanism
+// doesn't work on this type pair, an error will be returned.
+// 'meta' is given to allow you to pass information to conversion functions,
+// it is not used by Convert() other than storing it in the scope.
+// Not safe for objects with cyclic references!
+func (c *Converter) Convert(src, dest interface{}, meta *Meta) error {
+	pair := typePair{reflect.TypeOf(src), reflect.TypeOf(dest)}
+	scope := &scope{
+		converter: c,
+		meta:      meta,
+	}
+
+	// ignore conversions of this type
+	if _, ok := c.ignoredUntypedConversions[pair]; ok {
+		return nil
+	}
+	if fn, ok := c.conversionFuncs.untyped[pair]; ok {
+		return fn(src, dest, scope)
+	}
+	if fn, ok := c.generatedConversionFuncs.untyped[pair]; ok {
+		return fn(src, dest, scope)
+	}
+
+	dv, err := EnforcePtr(dest)
+	if err != nil {
+		return err
+	}
+	sv, err := EnforcePtr(src)
+	if err != nil {
+		return err
+	}
+	return fmt.Errorf("converting (%s) to (%s): unknown conversion", sv.Type(), dv.Type())
+}