forked from fabric8-services/fabric8-wit
/
list_type.go
51 lines (42 loc) · 1.66 KB
/
list_type.go
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package models
import (
"fmt"
"reflect"
)
//ListType describes a list of SimpleType values
type ListType struct {
SimpleType
ComponentType SimpleType
}
// ConvertToModel implements the FieldType interface
func (fieldType ListType) ConvertToModel(value interface{}) (interface{}, error) {
// the assumption is that work item types do not change over time...only new ones can be created
return convertList(func(fieldType FieldType, value interface{}) (interface{}, error) {
return fieldType.ConvertToModel(value)
}, fieldType, value)
}
// ConvertFromModel implements the FieldType interface
func (fieldType ListType) ConvertFromModel(value interface{}) (interface{}, error) {
// the assumption is that work item types do not change over time...only new ones can be created
return convertList(func(fieldType FieldType, value interface{}) (interface{}, error) {
return fieldType.ConvertFromModel(value)
}, fieldType, value)
}
type converter func(FieldType, interface{}) (interface{}, error)
func convertList(converter converter, fieldType ListType, value interface{}) (interface{}, error) {
// the assumption is that work item types do not change over time...only new ones can be created
valueType := reflect.TypeOf(value)
if valueType.Kind() != reflect.Array {
return nil, fmt.Errorf("value %v should be %s, but is %s", value, "array", valueType.Name())
}
valueArray := value.([]interface{})
converted := make([]interface{}, len(valueArray))
for i, _ := range converted {
var err error
converted[i], err = converter(fieldType, valueArray[i])
if err != nil {
return nil, fmt.Errorf("error converting list value: %s", err.Error())
}
}
return converted, nil
}