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map.go (1538B)


      1 package xml
      2 
      3 // mapEntryWrapper is the default member wrapper start element for XML Map entry
      4 var mapEntryWrapper = StartElement{
      5 	Name: Name{Local: "entry"},
      6 }
      7 
      8 // Map represents the encoding of a XML map type
      9 type Map struct {
     10 	w       writer
     11 	scratch *[]byte
     12 
     13 	// member start element is the map entry wrapper start element
     14 	memberStartElement StartElement
     15 
     16 	// isFlattened returns true if the map is a flattened map
     17 	isFlattened bool
     18 }
     19 
     20 // newMap returns a map encoder which sets the default map
     21 // entry wrapper to `entry`.
     22 //
     23 // A map `someMap : {{key:"abc", value:"123"}}` is represented as
     24 // `<someMap><entry><key>abc<key><value>123</value></entry></someMap>`.
     25 func newMap(w writer, scratch *[]byte) *Map {
     26 	return &Map{
     27 		w:                  w,
     28 		scratch:            scratch,
     29 		memberStartElement: mapEntryWrapper,
     30 	}
     31 }
     32 
     33 // newFlattenedMap returns a map encoder which sets the map
     34 // entry wrapper to the passed in memberWrapper`.
     35 //
     36 // A flattened map `someMap : {{key:"abc", value:"123"}}` is represented as
     37 // `<someMap><key>abc<key><value>123</value></someMap>`.
     38 func newFlattenedMap(w writer, scratch *[]byte, memberWrapper StartElement) *Map {
     39 	return &Map{
     40 		w:                  w,
     41 		scratch:            scratch,
     42 		memberStartElement: memberWrapper,
     43 		isFlattened:        true,
     44 	}
     45 }
     46 
     47 // Entry returns a Value encoder with map's element.
     48 // It writes the member wrapper start tag for each entry.
     49 func (m *Map) Entry() Value {
     50 	v := newValue(m.w, m.scratch, m.memberStartElement)
     51 	v.isFlattened = m.isFlattened
     52 	return v
     53 }