diff options
Diffstat (limited to 'vendor/k8s.io/apimachinery/pkg/conversion/converter.go')
| -rw-r--r-- | vendor/k8s.io/apimachinery/pkg/conversion/converter.go | 155 |
1 files changed, 37 insertions, 118 deletions
diff --git a/vendor/k8s.io/apimachinery/pkg/conversion/converter.go b/vendor/k8s.io/apimachinery/pkg/conversion/converter.go index bc615dc3a..2d7c8bd1e 100644 --- a/vendor/k8s.io/apimachinery/pkg/conversion/converter.go +++ b/vendor/k8s.io/apimachinery/pkg/conversion/converter.go @@ -54,7 +54,8 @@ type Converter struct { generatedConversionFuncs ConversionFuncs // Set of conversions that should be treated as a no-op - ignoredConversions map[typePair]struct{} + ignoredConversions map[typePair]struct{} + ignoredUntypedConversions map[typePair]struct{} // This is a map from a source field type and name, to a list of destination // field type and name. @@ -83,17 +84,23 @@ type Converter struct { // NewConverter creates a new Converter object. func NewConverter(nameFn NameFunc) *Converter { c := &Converter{ - conversionFuncs: NewConversionFuncs(), - generatedConversionFuncs: NewConversionFuncs(), - ignoredConversions: make(map[typePair]struct{}), - nameFunc: nameFn, - structFieldDests: make(map[typeNamePair][]typeNamePair), - structFieldSources: make(map[typeNamePair][]typeNamePair), + conversionFuncs: NewConversionFuncs(), + generatedConversionFuncs: NewConversionFuncs(), + ignoredConversions: make(map[typePair]struct{}), + ignoredUntypedConversions: make(map[typePair]struct{}), + nameFunc: nameFn, + structFieldDests: make(map[typeNamePair][]typeNamePair), + structFieldSources: make(map[typeNamePair][]typeNamePair), inputFieldMappingFuncs: make(map[reflect.Type]FieldMappingFunc), inputDefaultFlags: make(map[reflect.Type]FieldMatchingFlags), } - c.RegisterConversionFunc(Convert_Slice_byte_To_Slice_byte) + 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 } @@ -131,10 +138,6 @@ type Scope interface { // parameters, you'll run out of stack space before anything useful happens. Convert(src, dest interface{}, flags FieldMatchingFlags) error - // DefaultConvert performs the default conversion, without calling a conversion func - // on the current stack frame. This makes it safe to call from a conversion func. - DefaultConvert(src, dest interface{}, flags FieldMatchingFlags) error - // SrcTags and DestTags contain the struct tags that src and dest had, respectively. // If the enclosing object was not a struct, then these will contain no tags, of course. SrcTag() reflect.StructTag @@ -153,31 +156,14 @@ type FieldMappingFunc func(key string, sourceTag, destTag reflect.StructTag) (so func NewConversionFuncs() ConversionFuncs { return ConversionFuncs{ - fns: make(map[typePair]reflect.Value), untyped: make(map[typePair]ConversionFunc), } } type ConversionFuncs struct { - fns map[typePair]reflect.Value untyped map[typePair]ConversionFunc } -// Add adds the provided conversion functions to the lookup table - they must have the signature -// `func(type1, type2, Scope) error`. Functions are added in the order passed and will override -// previously registered pairs. -func (c ConversionFuncs) Add(fns ...interface{}) error { - for _, fn := range fns { - fv := reflect.ValueOf(fn) - ft := fv.Type() - if err := verifyConversionFunctionSignature(ft); err != nil { - return err - } - c.fns[typePair{ft.In(0).Elem(), ft.In(1).Elem()}] = fv - } - return nil -} - // 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. @@ -197,12 +183,6 @@ func (c ConversionFuncs) AddUntyped(a, b interface{}, fn ConversionFunc) error { // both other and c, with other conversions taking precedence. func (c ConversionFuncs) Merge(other ConversionFuncs) ConversionFuncs { merged := NewConversionFuncs() - for k, v := range c.fns { - merged.fns[k] = v - } - for k, v := range other.fns { - merged.fns[k] = v - } for k, v := range c.untyped { merged.untyped[k] = v } @@ -290,12 +270,6 @@ func (s *scope) Convert(src, dest interface{}, flags FieldMatchingFlags) error { return s.converter.Convert(src, dest, flags, s.meta) } -// DefaultConvert continues a conversion, performing a default conversion (no conversion func) -// for the current stack frame. -func (s *scope) DefaultConvert(src, dest interface{}, flags FieldMatchingFlags) error { - return s.converter.DefaultConvert(src, dest, flags, s.meta) -} - // SrcTag returns the tag of the struct containing the current source item, if any. func (s *scope) SrcTag() reflect.StructTag { return s.srcStack.top().tag @@ -360,29 +334,6 @@ func verifyConversionFunctionSignature(ft reflect.Type) error { return nil } -// RegisterConversionFunc registers a conversion func with the -// Converter. conversionFunc must take three parameters: a pointer to the input -// type, a pointer to the output type, and a conversion.Scope (which should be -// used if recursive conversion calls are desired). It must return an error. -// -// Example: -// c.RegisterConversionFunc( -// func(in *Pod, out *v1.Pod, s Scope) error { -// // conversion logic... -// return nil -// }) -// DEPRECATED: Will be removed in favor of RegisterUntypedConversionFunc -func (c *Converter) RegisterConversionFunc(conversionFunc interface{}) error { - return c.conversionFuncs.Add(conversionFunc) -} - -// Similar to RegisterConversionFunc, but registers conversion function that were -// automatically generated. -// DEPRECATED: Will be removed in favor of RegisterGeneratedUntypedConversionFunc -func (c *Converter) RegisterGeneratedConversionFunc(conversionFunc interface{}) error { - return c.generatedConversionFuncs.Add(conversionFunc) -} - // 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. @@ -409,6 +360,7 @@ func (c *Converter) RegisterIgnoredConversion(from, to interface{}) error { return fmt.Errorf("expected pointer arg for 'to' param 1, got: %v", typeTo) } c.ignoredConversions[typePair{typeFrom.Elem(), typeTo.Elem()}] = struct{}{} + c.ignoredUntypedConversions[typePair{typeFrom, typeTo}] = struct{}{} return nil } @@ -470,18 +422,6 @@ func (c *Converter) Convert(src, dest interface{}, flags FieldMatchingFlags, met return c.doConversion(src, dest, flags, meta, c.convert) } -// DefaultConvert will translate src to dest if it knows how. Both must be pointers. -// No conversion func is used. If the default copying mechanism -// doesn't work on this type pair, an error will be returned. -// Read the comments on the various FieldMatchingFlags constants to understand -// what the 'flags' parameter does. -// 'meta' is given to allow you to pass information to conversion functions, -// it is not used by DefaultConvert() other than storing it in the scope. -// Not safe for objects with cyclic references! -func (c *Converter) DefaultConvert(src, dest interface{}, flags FieldMatchingFlags, meta *Meta) error { - return c.doConversion(src, dest, flags, meta, c.defaultConvert) -} - type conversionFunc func(sv, dv reflect.Value, scope *scope) error func (c *Converter) doConversion(src, dest interface{}, flags FieldMatchingFlags, meta *Meta, f conversionFunc) error { @@ -491,6 +431,11 @@ func (c *Converter) doConversion(src, dest interface{}, flags FieldMatchingFlags flags: flags, 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) } @@ -517,33 +462,20 @@ func (c *Converter) doConversion(src, dest interface{}, flags FieldMatchingFlags return f(sv, dv, scope) } -// callCustom calls 'custom' with sv & dv. custom must be a conversion function. -func (c *Converter) callCustom(sv, dv, custom reflect.Value, scope *scope) error { - if !sv.CanAddr() { - sv2 := reflect.New(sv.Type()) - sv2.Elem().Set(sv) - sv = sv2 - } else { - sv = sv.Addr() - } +// callUntyped calls predefined conversion func. +func (c *Converter) callUntyped(sv, dv reflect.Value, f ConversionFunc, scope *scope) error { if !dv.CanAddr() { - if !dv.CanSet() { - return scope.errorf("can't addr or set dest.") - } - dvOrig := dv - dv := reflect.New(dvOrig.Type()) - defer func() { dvOrig.Set(dv) }() - } else { - dv = dv.Addr() + return scope.errorf("cant addr dest") } - args := []reflect.Value{sv, dv, reflect.ValueOf(scope)} - ret := custom.Call(args)[0].Interface() - // This convolution is necessary because nil interfaces won't convert - // to errors. - if ret == nil { - return nil + var svPointer reflect.Value + if sv.CanAddr() { + svPointer = sv.Addr() + } else { + svPointer = reflect.New(sv.Type()) + svPointer.Elem().Set(sv) } - return ret.(error) + dvPointer := dv.Addr() + return f(svPointer.Interface(), dvPointer.Interface(), scope) } // convert recursively copies sv into dv, calling an appropriate conversion function if @@ -561,27 +493,14 @@ func (c *Converter) convert(sv, dv reflect.Value, scope *scope) error { } // Convert sv to dv. - if fv, ok := c.conversionFuncs.fns[pair]; ok { - if c.Debug != nil { - c.Debug.Logf("Calling custom conversion of '%v' to '%v'", st, dt) - } - return c.callCustom(sv, dv, fv, scope) + pair = typePair{reflect.PtrTo(sv.Type()), reflect.PtrTo(dv.Type())} + if f, ok := c.conversionFuncs.untyped[pair]; ok { + return c.callUntyped(sv, dv, f, scope) } - if fv, ok := c.generatedConversionFuncs.fns[pair]; ok { - if c.Debug != nil { - c.Debug.Logf("Calling generated conversion of '%v' to '%v'", st, dt) - } - return c.callCustom(sv, dv, fv, scope) + if f, ok := c.generatedConversionFuncs.untyped[pair]; ok { + return c.callUntyped(sv, dv, f, scope) } - return c.defaultConvert(sv, dv, scope) -} - -// defaultConvert recursively copies sv into dv. no conversion function is called -// for the current stack frame (but conversion functions may be called for nested objects) -func (c *Converter) defaultConvert(sv, dv reflect.Value, scope *scope) error { - dt, st := dv.Type(), sv.Type() - if !dv.CanSet() { return scope.errorf("Cannot set dest. (Tried to deep copy something with unexported fields?)") } |