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// +build codegen
package api
import (
"fmt"
"reflect"
"sort"
"strings"
)
// ShapeValueBuilder provides the logic to build the nested values for a shape.
type ShapeValueBuilder struct{}
// BuildShape will recursively build the referenced shape based on the json
// object provided. isMap will dictate how the field name is specified. If
// isMap is true, we will expect the member name to be quotes like "Foo".
func (b ShapeValueBuilder) BuildShape(ref *ShapeRef, shapes map[string]interface{}, isMap bool) string {
order := make([]string, len(shapes))
for k := range shapes {
order = append(order, k)
}
sort.Strings(order)
ret := ""
for _, name := range order {
if name == "" {
continue
}
shape := shapes[name]
// If the shape isn't a map, we want to export the value, since every field
// defined in our shapes are exported.
if len(name) > 0 && !isMap && strings.ToLower(name[0:1]) == name[0:1] {
name = strings.Title(name)
}
memName := name
passRef := ref.Shape.MemberRefs[name]
if isMap {
memName = fmt.Sprintf("%q", memName)
passRef = &ref.Shape.ValueRef
}
switch v := shape.(type) {
case map[string]interface{}:
ret += b.BuildComplex(name, memName, passRef, v)
case []interface{}:
ret += b.BuildList(name, memName, passRef, v)
default:
ret += b.BuildScalar(name, memName, passRef, v, ref.Shape.Payload == name)
}
}
return ret
}
// BuildList will construct a list shape based off the service's definition of
// that list.
func (b ShapeValueBuilder) BuildList(name, memName string, ref *ShapeRef, v []interface{}) string {
ret := ""
if len(v) == 0 || ref == nil {
return ""
}
passRef := &ref.Shape.MemberRef
ret += fmt.Sprintf("%s: %s {\n", memName, b.GoType(ref, false))
ret += b.buildListElements(passRef, v)
ret += "},\n"
return ret
}
func (b ShapeValueBuilder) buildListElements(ref *ShapeRef, v []interface{}) string {
if len(v) == 0 || ref == nil {
return ""
}
ret := ""
format := ""
isComplex := false
isList := false
// get format for atomic type. If it is not an atomic type,
// get the element.
switch v[0].(type) {
case string:
format = "%s"
case bool:
format = "%t"
case float64:
switch ref.Shape.Type {
case "integer", "int64", "long":
format = "%d"
default:
format = "%f"
}
case []interface{}:
isList = true
case map[string]interface{}:
isComplex = true
}
for _, elem := range v {
if isComplex {
ret += fmt.Sprintf("{\n%s\n},\n", b.BuildShape(ref, elem.(map[string]interface{}), ref.Shape.Type == "map"))
} else if isList {
ret += fmt.Sprintf("{\n%s\n},\n", b.buildListElements(&ref.Shape.MemberRef, elem.([]interface{})))
} else {
switch ref.Shape.Type {
case "integer", "int64", "long":
elem = int(elem.(float64))
}
ret += fmt.Sprintf("%s,\n", getValue(ref.Shape.Type, fmt.Sprintf(format, elem)))
}
}
return ret
}
// BuildScalar will build atomic Go types.
func (b ShapeValueBuilder) BuildScalar(name, memName string, ref *ShapeRef, shape interface{}, isPayload bool) string {
if ref == nil || ref.Shape == nil {
return ""
}
switch v := shape.(type) {
case bool:
return convertToCorrectType(memName, ref.Shape.Type, fmt.Sprintf("%t", v))
case int:
if ref.Shape.Type == "timestamp" {
return parseTimeString(ref, memName, fmt.Sprintf("%d", v))
}
return convertToCorrectType(memName, ref.Shape.Type, fmt.Sprintf("%d", v))
case float64:
dataType := ref.Shape.Type
if dataType == "integer" || dataType == "int64" || dataType == "long" {
return convertToCorrectType(memName, ref.Shape.Type, fmt.Sprintf("%d", int(shape.(float64))))
}
return convertToCorrectType(memName, ref.Shape.Type, fmt.Sprintf("%f", v))
case string:
t := ref.Shape.Type
switch t {
case "timestamp":
return parseTimeString(ref, memName, fmt.Sprintf("%s", v))
case "blob":
if (ref.Streaming || ref.Shape.Streaming) && isPayload {
return fmt.Sprintf("%s: aws.ReadSeekCloser(strings.NewReader(%q)),\n", memName, v)
}
return fmt.Sprintf("%s: []byte(%q),\n", memName, v)
default:
return convertToCorrectType(memName, t, v)
}
default:
panic(fmt.Errorf("Unsupported scalar type: %v", reflect.TypeOf(v)))
}
}
// BuildComplex will build the shape's value for complex types such as structs,
// and maps.
func (b ShapeValueBuilder) BuildComplex(name, memName string, ref *ShapeRef, v map[string]interface{}) string {
switch ref.Shape.Type {
case "structure":
return fmt.Sprintf(`%s: &%s{
%s
},
`, memName, b.GoType(ref, true), b.BuildShape(ref, v, false))
case "map":
return fmt.Sprintf(`%s: %s{
%s
},
`, name, b.GoType(ref, false), b.BuildShape(ref, v, true))
default:
panic(fmt.Sprintf("Expected complex type but received %q", ref.Shape.Type))
}
}
// GoType returns the string of the shape's Go type identifier.
func (b ShapeValueBuilder) GoType(ref *ShapeRef, elem bool) string {
if ref.Shape.Type != "structure" && ref.Shape.Type != "list" && ref.Shape.Type != "map" {
// Scalars are always pointers.
return ref.GoTypeWithPkgName()
}
prefix := ""
if ref.Shape.Type == "list" {
ref = &ref.Shape.MemberRef
prefix = "[]"
}
if elem {
return prefix + ref.Shape.GoTypeWithPkgNameElem()
}
return prefix + ref.GoTypeWithPkgName()
}
|
