diff options
Diffstat (limited to 'Godeps/_workspace/src/github.com/awslabs/aws-sdk-go/aws/awsutil')
3 files changed, 290 insertions, 0 deletions
diff --git a/Godeps/_workspace/src/github.com/awslabs/aws-sdk-go/aws/awsutil/path_value.go b/Godeps/_workspace/src/github.com/awslabs/aws-sdk-go/aws/awsutil/path_value.go new file mode 100644 index 000000000..ce4c5e27a --- /dev/null +++ b/Godeps/_workspace/src/github.com/awslabs/aws-sdk-go/aws/awsutil/path_value.go @@ -0,0 +1,142 @@ +package awsutil + +import ( + "reflect" + "regexp" + "strconv" + "strings" +) + +var indexRe = regexp.MustCompile(`(.+)\[(-?\d+)?\]$`) + +func rValuesAtPath(v interface{}, path string, create bool) []reflect.Value { + pathparts := strings.Split(path, "||") + if len(pathparts) > 1 { + for _, pathpart := range pathparts { + vals := rValuesAtPath(v, pathpart, create) + if vals != nil && len(vals) > 0 { + return vals + } + } + return nil + } + + values := []reflect.Value{reflect.Indirect(reflect.ValueOf(v))} + components := strings.Split(path, ".") + for len(values) > 0 && len(components) > 0 { + var index *int64 + var indexStar bool + c := strings.TrimSpace(components[0]) + if c == "" { // no actual component, illegal syntax + return nil + } else if c != "*" && strings.ToLower(c[0:1]) == c[0:1] { + // TODO normalize case for user + return nil // don't support unexported fields + } + + // parse this component + if m := indexRe.FindStringSubmatch(c); m != nil { + c = m[1] + if m[2] == "" { + index = nil + indexStar = true + } else { + i, _ := strconv.ParseInt(m[2], 10, 32) + index = &i + indexStar = false + } + } + + nextvals := []reflect.Value{} + for _, value := range values { + // pull component name out of struct member + if value.Kind() != reflect.Struct { + continue + } + + if c == "*" { // pull all members + for i := 0; i < value.NumField(); i++ { + if f := reflect.Indirect(value.Field(i)); f.IsValid() { + nextvals = append(nextvals, f) + } + } + continue + } + + value = value.FieldByName(c) + if create && value.Kind() == reflect.Ptr && value.IsNil() { + value.Set(reflect.New(value.Type().Elem())) + value = value.Elem() + } else { + value = reflect.Indirect(value) + } + + if value.IsValid() { + nextvals = append(nextvals, value) + } + } + values = nextvals + + if indexStar || index != nil { + nextvals = []reflect.Value{} + for _, value := range values { + value := reflect.Indirect(value) + if value.Kind() != reflect.Slice { + continue + } + + if indexStar { // grab all indices + for i := 0; i < value.Len(); i++ { + idx := reflect.Indirect(value.Index(i)) + if idx.IsValid() { + nextvals = append(nextvals, idx) + } + } + continue + } + + // pull out index + i := int(*index) + if i >= value.Len() { // check out of bounds + if create { + // TODO resize slice + } else { + continue + } + } else if i < 0 { // support negative indexing + i = value.Len() + i + } + value = reflect.Indirect(value.Index(i)) + + if value.IsValid() { + nextvals = append(nextvals, value) + } + } + values = nextvals + } + + components = components[1:] + } + return values +} + +// ValuesAtPath returns a list of objects at the lexical path inside of a structure +func ValuesAtPath(i interface{}, path string) []interface{} { + if rvals := rValuesAtPath(i, path, false); rvals != nil { + vals := make([]interface{}, len(rvals)) + for i, rval := range rvals { + vals[i] = rval.Interface() + } + return vals + } + return nil +} + +// SetValueAtPath sets an object at the lexical path inside of a structure +func SetValueAtPath(i interface{}, path string, v interface{}) { + if rvals := rValuesAtPath(i, path, true); rvals != nil { + for _, rval := range rvals { + rval.Set(reflect.ValueOf(v)) + } + } +} diff --git a/Godeps/_workspace/src/github.com/awslabs/aws-sdk-go/aws/awsutil/path_value_test.go b/Godeps/_workspace/src/github.com/awslabs/aws-sdk-go/aws/awsutil/path_value_test.go new file mode 100644 index 000000000..881927365 --- /dev/null +++ b/Godeps/_workspace/src/github.com/awslabs/aws-sdk-go/aws/awsutil/path_value_test.go @@ -0,0 +1,60 @@ +package awsutil_test + +import ( + "testing" + + "github.com/awslabs/aws-sdk-go/aws/awsutil" + "github.com/stretchr/testify/assert" +) + +type Struct struct { + A []Struct + a []Struct + B *Struct + D *Struct + C string +} + +var data = Struct{ + A: []Struct{Struct{C: "value1"}, Struct{C: "value2"}, Struct{C: "value3"}}, + a: []Struct{Struct{C: "value1"}, Struct{C: "value2"}, Struct{C: "value3"}}, + B: &Struct{B: &Struct{C: "terminal"}, D: &Struct{C: "terminal2"}}, + C: "initial", +} + +func TestValueAtPathSuccess(t *testing.T) { + assert.Equal(t, []interface{}{"initial"}, awsutil.ValuesAtPath(data, "C")) + assert.Equal(t, []interface{}{"value1"}, awsutil.ValuesAtPath(data, "A[0].C")) + assert.Equal(t, []interface{}{"value2"}, awsutil.ValuesAtPath(data, "A[1].C")) + assert.Equal(t, []interface{}{"value3"}, awsutil.ValuesAtPath(data, "A[2].C")) + assert.Equal(t, []interface{}{"value3"}, awsutil.ValuesAtPath(data, "A[-1].C")) + assert.Equal(t, []interface{}{"value1", "value2", "value3"}, awsutil.ValuesAtPath(data, "A[].C")) + assert.Equal(t, []interface{}{"terminal"}, awsutil.ValuesAtPath(data, "B . B . C")) + assert.Equal(t, []interface{}{"terminal", "terminal2"}, awsutil.ValuesAtPath(data, "B.*.C")) + assert.Equal(t, []interface{}{"initial"}, awsutil.ValuesAtPath(data, "A.D.X || C")) +} + +func TestValueAtPathFailure(t *testing.T) { + assert.Equal(t, []interface{}(nil), awsutil.ValuesAtPath(data, "C.x")) + assert.Equal(t, []interface{}(nil), awsutil.ValuesAtPath(data, ".x")) + assert.Equal(t, []interface{}{}, awsutil.ValuesAtPath(data, "X.Y.Z")) + assert.Equal(t, []interface{}{}, awsutil.ValuesAtPath(data, "A[100].C")) + assert.Equal(t, []interface{}{}, awsutil.ValuesAtPath(data, "A[3].C")) + assert.Equal(t, []interface{}{}, awsutil.ValuesAtPath(data, "B.B.C.Z")) + assert.Equal(t, []interface{}(nil), awsutil.ValuesAtPath(data, "a[-1].C")) + assert.Equal(t, []interface{}{}, awsutil.ValuesAtPath(nil, "A.B.C")) +} + +func TestSetValueAtPathSuccess(t *testing.T) { + var s Struct + awsutil.SetValueAtPath(&s, "C", "test1") + awsutil.SetValueAtPath(&s, "B.B.C", "test2") + awsutil.SetValueAtPath(&s, "B.D.C", "test3") + assert.Equal(t, "test1", s.C) + assert.Equal(t, "test2", s.B.B.C) + assert.Equal(t, "test3", s.B.D.C) + + awsutil.SetValueAtPath(&s, "B.*.C", "test0") + assert.Equal(t, "test0", s.B.B.C) + assert.Equal(t, "test0", s.B.D.C) +} diff --git a/Godeps/_workspace/src/github.com/awslabs/aws-sdk-go/aws/awsutil/string_value.go b/Godeps/_workspace/src/github.com/awslabs/aws-sdk-go/aws/awsutil/string_value.go new file mode 100644 index 000000000..2e90f8da4 --- /dev/null +++ b/Godeps/_workspace/src/github.com/awslabs/aws-sdk-go/aws/awsutil/string_value.go @@ -0,0 +1,88 @@ +package awsutil + +import ( + "bytes" + "fmt" + "reflect" + "strings" +) + +func StringValue(i interface{}) string { + var buf bytes.Buffer + stringValue(reflect.ValueOf(i), 0, &buf) + return buf.String() +} + +func stringValue(v reflect.Value, indent int, buf *bytes.Buffer) { + for v.Kind() == reflect.Ptr { + v = v.Elem() + } + + switch v.Kind() { + case reflect.Struct: + buf.WriteString("{\n") + + names := []string{} + for i := 0; i < v.Type().NumField(); i++ { + name := v.Type().Field(i).Name + f := v.Field(i) + if name[0:1] == strings.ToLower(name[0:1]) { + continue // ignore unexported fields + } + if (f.Kind() == reflect.Ptr || f.Kind() == reflect.Slice) && f.IsNil() { + continue // ignore unset fields + } + names = append(names, name) + } + + for i, n := range names { + val := v.FieldByName(n) + buf.WriteString(strings.Repeat(" ", indent+2)) + buf.WriteString(n + ": ") + stringValue(val, indent+2, buf) + + if i < len(names)-1 { + buf.WriteString(",\n") + } + } + + buf.WriteString("\n" + strings.Repeat(" ", indent) + "}") + case reflect.Slice: + nl, id, id2 := "", "", "" + if v.Len() > 3 { + nl, id, id2 = "\n", strings.Repeat(" ", indent), strings.Repeat(" ", indent+2) + } + buf.WriteString("[" + nl) + for i := 0; i < v.Len(); i++ { + buf.WriteString(id2) + stringValue(v.Index(i), indent+2, buf) + + if i < v.Len()-1 { + buf.WriteString("," + nl) + } + } + + buf.WriteString(nl + id + "]") + case reflect.Map: + buf.WriteString("{\n") + + for i, k := range v.MapKeys() { + buf.WriteString(strings.Repeat(" ", indent+2)) + buf.WriteString(k.String() + ": ") + stringValue(v.MapIndex(k), indent+2, buf) + + if i < v.Len()-1 { + buf.WriteString(",\n") + } + } + + buf.WriteString("\n" + strings.Repeat(" ", indent) + "}") + default: + format := "%v" + switch v.Interface().(type) { + case string: + format = "%q" + } + fmt.Fprintf(buf, format, v.Interface()) + } +} |