github.com/vmware/govmomi@v0.51.0/vim25/xml/extras.go (about)

     1  // © Broadcom. All Rights Reserved.
     2  // The term “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
     3  // SPDX-License-Identifier: Apache-2.0
     4  
     5  package xml
     6  
     7  import (
     8  	"reflect"
     9  	"time"
    10  )
    11  
    12  var xmlSchemaInstance = Name{Space: "http://www.w3.org/2001/XMLSchema-instance", Local: "type"}
    13  
    14  var xsiType = Name{Space: "xsi", Local: "type"}
    15  
    16  var stringToTypeMap = map[string]reflect.Type{
    17  	"xsd:boolean":       reflect.TypeOf((*bool)(nil)).Elem(),
    18  	"xsd:byte":          reflect.TypeOf((*int8)(nil)).Elem(),
    19  	"xsd:short":         reflect.TypeOf((*int16)(nil)).Elem(),
    20  	"xsd:int":           reflect.TypeOf((*int32)(nil)).Elem(),
    21  	"xsd:long":          reflect.TypeOf((*int64)(nil)).Elem(),
    22  	"xsd:unsignedByte":  reflect.TypeOf((*uint8)(nil)).Elem(),
    23  	"xsd:unsignedShort": reflect.TypeOf((*uint16)(nil)).Elem(),
    24  	"xsd:unsignedInt":   reflect.TypeOf((*uint32)(nil)).Elem(),
    25  	"xsd:unsignedLong":  reflect.TypeOf((*uint64)(nil)).Elem(),
    26  	"xsd:float":         reflect.TypeOf((*float32)(nil)).Elem(),
    27  	"xsd:double":        reflect.TypeOf((*float64)(nil)).Elem(),
    28  	"xsd:string":        reflect.TypeOf((*string)(nil)).Elem(),
    29  	"xsd:dateTime":      reflect.TypeOf((*time.Time)(nil)).Elem(),
    30  	"xsd:base64Binary":  reflect.TypeOf((*[]byte)(nil)).Elem(),
    31  }
    32  
    33  // Return a reflect.Type for the specified type. Nil if unknown.
    34  func stringToType(s string) reflect.Type {
    35  	return stringToTypeMap[s]
    36  }
    37  
    38  // Return a string for the specified reflect.Type. Panic if unknown.
    39  func typeToString(typ reflect.Type) string {
    40  	switch typ.Kind() {
    41  	case reflect.Bool:
    42  		return "xsd:boolean"
    43  	case reflect.Int8:
    44  		return "xsd:byte"
    45  	case reflect.Int16:
    46  		return "xsd:short"
    47  	case reflect.Int32:
    48  		return "xsd:int"
    49  	case reflect.Int, reflect.Int64:
    50  		return "xsd:long"
    51  	case reflect.Uint8:
    52  		return "xsd:unsignedByte"
    53  	case reflect.Uint16:
    54  		return "xsd:unsignedShort"
    55  	case reflect.Uint32:
    56  		return "xsd:unsignedInt"
    57  	case reflect.Uint, reflect.Uint64:
    58  		return "xsd:unsignedLong"
    59  	case reflect.Float32:
    60  		return "xsd:float"
    61  	case reflect.Float64:
    62  		return "xsd:double"
    63  	case reflect.String:
    64  		name := typ.Name()
    65  		if name == "string" {
    66  			return "xsd:string"
    67  		}
    68  		return name
    69  	case reflect.Struct:
    70  		if typ == stringToTypeMap["xsd:dateTime"] {
    71  			return "xsd:dateTime"
    72  		}
    73  
    74  		// Expect any other struct to be handled...
    75  		return typ.Name()
    76  	case reflect.Slice:
    77  		if typ.Elem().Kind() == reflect.Uint8 {
    78  			return "xsd:base64Binary"
    79  		}
    80  	case reflect.Array:
    81  		if typ.Elem().Kind() == reflect.Uint8 {
    82  			return "xsd:base64Binary"
    83  		}
    84  	}
    85  
    86  	panic("don't know what to do for type: " + typ.String())
    87  }
    88  
    89  // Find reflect.Type for an element's type attribute.
    90  func (p *Decoder) typeForElement(val reflect.Value, start *StartElement) reflect.Type {
    91  	t := ""
    92  	for _, a := range start.Attr {
    93  		if a.Name == xmlSchemaInstance || a.Name == xsiType {
    94  			t = a.Value
    95  			break
    96  		}
    97  	}
    98  
    99  	if t == "" {
   100  		// No type attribute; fall back to looking up type by interface name.
   101  		t = val.Type().Name()
   102  	}
   103  
   104  	// Maybe the type is a basic xsd:* type.
   105  	typ := stringToType(t)
   106  	if typ != nil {
   107  		return typ
   108  	}
   109  
   110  	// Maybe the type is a custom type.
   111  	if p.TypeFunc != nil {
   112  		if typ, ok := p.TypeFunc(t); ok {
   113  			return typ
   114  		}
   115  	}
   116  
   117  	return nil
   118  }