prometheus/vendor/github.com/go-openapi/validate/result.go

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// Copyright 2015 go-swagger maintainers
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package validate
import (
"fmt"
"reflect"
"strings"
"github.com/go-openapi/errors"
"github.com/go-openapi/spec"
)
// Result represents a validation result set, composed of
// errors and warnings.
//
// It is used to keep track of all detected errors and warnings during
// the validation of a specification.
//
// Matchcount is used to determine
// which errors are relevant in the case of AnyOf, OneOf
// schema validation. Results from the validation branch
// with most matches get eventually selected.
//
// TODO: keep path of key originating the error
type Result struct {
Errors []error
Warnings []error
MatchCount int
// the object data
data interface{}
// Schemata for the root object
rootObjectSchemata schemata
// Schemata for object fields
fieldSchemata []fieldSchemata
// Schemata for slice items
itemSchemata []itemSchemata
cachedFieldSchemta map[FieldKey][]*spec.Schema
cachedItemSchemata map[ItemKey][]*spec.Schema
}
// FieldKey is a pair of an object and a field, usable as a key for a map.
type FieldKey struct {
object reflect.Value // actually a map[string]interface{}, but the latter cannot be a key
field string
}
// ItemKey is a pair of a slice and an index, usable as a key for a map.
type ItemKey struct {
slice reflect.Value // actually a []interface{}, but the latter cannot be a key
index int
}
// NewFieldKey returns a pair of an object and field usable as a key of a map.
func NewFieldKey(obj map[string]interface{}, field string) FieldKey {
return FieldKey{object: reflect.ValueOf(obj), field: field}
}
// Object returns the underlying object of this key.
func (fk *FieldKey) Object() map[string]interface{} {
return fk.object.Interface().(map[string]interface{})
}
// Field returns the underlying field of this key.
func (fk *FieldKey) Field() string {
return fk.field
}
// NewItemKey returns a pair of a slice and index usable as a key of a map.
func NewItemKey(slice interface{}, i int) ItemKey {
return ItemKey{slice: reflect.ValueOf(slice), index: i}
}
// Slice returns the underlying slice of this key.
func (ik *ItemKey) Slice() []interface{} {
return ik.slice.Interface().([]interface{})
}
// Index returns the underlying index of this key.
func (ik *ItemKey) Index() int {
return ik.index
}
type fieldSchemata struct {
obj map[string]interface{}
field string
schemata schemata
}
type itemSchemata struct {
slice reflect.Value
index int
schemata schemata
}
// Merge merges this result with the other one(s), preserving match counts etc.
func (r *Result) Merge(others ...*Result) *Result {
for _, other := range others {
if other == nil {
continue
}
r.mergeWithoutRootSchemata(other)
r.rootObjectSchemata.Append(other.rootObjectSchemata)
}
return r
}
// Data returns the original data object used for validation. Mutating this renders
// the result invalid.
func (r *Result) Data() interface{} {
return r.data
}
// RootObjectSchemata returns the schemata which apply to the root object.
func (r *Result) RootObjectSchemata() []*spec.Schema {
return r.rootObjectSchemata.Slice()
}
// FieldSchemata returns the schemata which apply to fields in objects.
// nolint: dupl
func (r *Result) FieldSchemata() map[FieldKey][]*spec.Schema {
if r.cachedFieldSchemta != nil {
return r.cachedFieldSchemta
}
ret := make(map[FieldKey][]*spec.Schema, len(r.fieldSchemata))
for _, fs := range r.fieldSchemata {
key := NewFieldKey(fs.obj, fs.field)
if fs.schemata.one != nil {
ret[key] = append(ret[key], fs.schemata.one)
} else if len(fs.schemata.multiple) > 0 {
ret[key] = append(ret[key], fs.schemata.multiple...)
}
}
r.cachedFieldSchemta = ret
return ret
}
// ItemSchemata returns the schemata which apply to items in slices.
// nolint: dupl
func (r *Result) ItemSchemata() map[ItemKey][]*spec.Schema {
if r.cachedItemSchemata != nil {
return r.cachedItemSchemata
}
ret := make(map[ItemKey][]*spec.Schema, len(r.itemSchemata))
for _, ss := range r.itemSchemata {
key := NewItemKey(ss.slice, ss.index)
if ss.schemata.one != nil {
ret[key] = append(ret[key], ss.schemata.one)
} else if len(ss.schemata.multiple) > 0 {
ret[key] = append(ret[key], ss.schemata.multiple...)
}
}
r.cachedItemSchemata = ret
return ret
}
func (r *Result) resetCaches() {
r.cachedFieldSchemta = nil
r.cachedItemSchemata = nil
}
// mergeForField merges other into r, assigning other's root schemata to the given Object and field name.
// nolint: unparam
func (r *Result) mergeForField(obj map[string]interface{}, field string, other *Result) *Result {
if other == nil {
return r
}
r.mergeWithoutRootSchemata(other)
if other.rootObjectSchemata.Len() > 0 {
if r.fieldSchemata == nil {
r.fieldSchemata = make([]fieldSchemata, len(obj))
}
r.fieldSchemata = append(r.fieldSchemata, fieldSchemata{
obj: obj,
field: field,
schemata: other.rootObjectSchemata,
})
}
return r
}
// mergeForSlice merges other into r, assigning other's root schemata to the given slice and index.
// nolint: unparam
func (r *Result) mergeForSlice(slice reflect.Value, i int, other *Result) *Result {
if other == nil {
return r
}
r.mergeWithoutRootSchemata(other)
if other.rootObjectSchemata.Len() > 0 {
if r.itemSchemata == nil {
r.itemSchemata = make([]itemSchemata, slice.Len())
}
r.itemSchemata = append(r.itemSchemata, itemSchemata{
slice: slice,
index: i,
schemata: other.rootObjectSchemata,
})
}
return r
}
// addRootObjectSchemata adds the given schemata for the root object of the result.
// The slice schemata might be reused. I.e. do not modify it after being added to a result.
func (r *Result) addRootObjectSchemata(s *spec.Schema) {
r.rootObjectSchemata.Append(schemata{one: s})
}
// addPropertySchemata adds the given schemata for the object and field.
// The slice schemata might be reused. I.e. do not modify it after being added to a result.
func (r *Result) addPropertySchemata(obj map[string]interface{}, fld string, schema *spec.Schema) {
if r.fieldSchemata == nil {
r.fieldSchemata = make([]fieldSchemata, 0, len(obj))
}
r.fieldSchemata = append(r.fieldSchemata, fieldSchemata{obj: obj, field: fld, schemata: schemata{one: schema}})
}
/*
// addSliceSchemata adds the given schemata for the slice and index.
// The slice schemata might be reused. I.e. do not modify it after being added to a result.
func (r *Result) addSliceSchemata(slice reflect.Value, i int, schema *spec.Schema) {
if r.itemSchemata == nil {
r.itemSchemata = make([]itemSchemata, 0, slice.Len())
}
r.itemSchemata = append(r.itemSchemata, itemSchemata{slice: slice, index: i, schemata: schemata{one: schema}})
}
*/
// mergeWithoutRootSchemata merges other into r, ignoring the rootObject schemata.
func (r *Result) mergeWithoutRootSchemata(other *Result) {
r.resetCaches()
r.AddErrors(other.Errors...)
r.AddWarnings(other.Warnings...)
r.MatchCount += other.MatchCount
if other.fieldSchemata != nil {
if r.fieldSchemata == nil {
r.fieldSchemata = other.fieldSchemata
} else {
r.fieldSchemata = append(r.fieldSchemata, other.fieldSchemata...)
}
}
if other.itemSchemata != nil {
if r.itemSchemata == nil {
r.itemSchemata = other.itemSchemata
} else {
r.itemSchemata = append(r.itemSchemata, other.itemSchemata...)
}
}
}
// MergeAsErrors merges this result with the other one(s), preserving match counts etc.
//
// Warnings from input are merged as Errors in the returned merged Result.
func (r *Result) MergeAsErrors(others ...*Result) *Result {
for _, other := range others {
if other != nil {
r.resetCaches()
r.AddErrors(other.Errors...)
r.AddErrors(other.Warnings...)
r.MatchCount += other.MatchCount
}
}
return r
}
// MergeAsWarnings merges this result with the other one(s), preserving match counts etc.
//
// Errors from input are merged as Warnings in the returned merged Result.
func (r *Result) MergeAsWarnings(others ...*Result) *Result {
for _, other := range others {
if other != nil {
r.resetCaches()
r.AddWarnings(other.Errors...)
r.AddWarnings(other.Warnings...)
r.MatchCount += other.MatchCount
}
}
return r
}
// AddErrors adds errors to this validation result (if not already reported).
//
// Since the same check may be passed several times while exploring the
// spec structure (via $ref, ...) reported messages are kept
// unique.
func (r *Result) AddErrors(errors ...error) {
for _, e := range errors {
found := false
if e != nil {
for _, isReported := range r.Errors {
if e.Error() == isReported.Error() {
found = true
break
}
}
if !found {
r.Errors = append(r.Errors, e)
}
}
}
}
// AddWarnings adds warnings to this validation result (if not already reported).
func (r *Result) AddWarnings(warnings ...error) {
for _, e := range warnings {
found := false
if e != nil {
for _, isReported := range r.Warnings {
if e.Error() == isReported.Error() {
found = true
break
}
}
if !found {
r.Warnings = append(r.Warnings, e)
}
}
}
}
func (r *Result) keepRelevantErrors() *Result {
// TODO: this one is going to disapear...
// keepRelevantErrors strips a result from standard errors and keeps
// the ones which are supposedly more accurate.
//
// The original result remains unaffected (creates a new instance of Result).
// This method is used to work around the "matchCount" filter which would otherwise
// strip our result from some accurate error reporting from lower level validators.
//
// NOTE: this implementation with a placeholder (IMPORTANT!) is neither clean nor
// very efficient. On the other hand, relying on go-openapi/errors to manipulate
// codes would require to change a lot here. So, for the moment, let's go with
// placeholders.
strippedErrors := []error{}
for _, e := range r.Errors {
if strings.HasPrefix(e.Error(), "IMPORTANT!") {
strippedErrors = append(strippedErrors, fmt.Errorf(strings.TrimPrefix(e.Error(), "IMPORTANT!")))
}
}
strippedWarnings := []error{}
for _, e := range r.Warnings {
if strings.HasPrefix(e.Error(), "IMPORTANT!") {
strippedWarnings = append(strippedWarnings, fmt.Errorf(strings.TrimPrefix(e.Error(), "IMPORTANT!")))
}
}
strippedResult := new(Result)
strippedResult.Errors = strippedErrors
strippedResult.Warnings = strippedWarnings
return strippedResult
}
// IsValid returns true when this result is valid.
//
// Returns true on a nil *Result.
func (r *Result) IsValid() bool {
if r == nil {
return true
}
return len(r.Errors) == 0
}
// HasErrors returns true when this result is invalid.
//
// Returns false on a nil *Result.
func (r *Result) HasErrors() bool {
if r == nil {
return false
}
return !r.IsValid()
}
// HasWarnings returns true when this result contains warnings.
//
// Returns false on a nil *Result.
func (r *Result) HasWarnings() bool {
if r == nil {
return false
}
return len(r.Warnings) > 0
}
// HasErrorsOrWarnings returns true when this result contains
// either errors or warnings.
//
// Returns false on a nil *Result.
func (r *Result) HasErrorsOrWarnings() bool {
if r == nil {
return false
}
return len(r.Errors) > 0 || len(r.Warnings) > 0
}
// Inc increments the match count
func (r *Result) Inc() {
r.MatchCount++
}
// AsError renders this result as an error interface
//
// TODO: reporting / pretty print with path ordered and indented
func (r *Result) AsError() error {
if r.IsValid() {
return nil
}
return errors.CompositeValidationError(r.Errors...)
}
// schemata is an arbitrary number of schemata. It does a distinction between zero,
// one and many schemata to avoid slice allocations.
type schemata struct {
// one is set if there is exactly one schema. In that case multiple must be nil.
one *spec.Schema
// multiple is an arbitrary number of schemas. If it is set, one must be nil.
multiple []*spec.Schema
}
func (s *schemata) Len() int {
if s.one != nil {
return 1
}
return len(s.multiple)
}
func (s *schemata) Slice() []*spec.Schema {
if s == nil {
return nil
}
if s.one != nil {
return []*spec.Schema{s.one}
}
return s.multiple
}
// appendSchemata appends the schemata in other to s. It mutated s in-place.
func (s *schemata) Append(other schemata) {
if other.one == nil && len(other.multiple) == 0 {
return
}
if s.one == nil && len(s.multiple) == 0 {
*s = other
return
}
if s.one != nil {
if other.one != nil {
s.multiple = []*spec.Schema{s.one, other.one}
} else {
t := make([]*spec.Schema, 0, 1+len(other.multiple))
s.multiple = append(append(t, s.one), other.multiple...)
}
s.one = nil
} else {
if other.one != nil {
s.multiple = append(s.multiple, other.one)
} else {
if cap(s.multiple) >= len(s.multiple)+len(other.multiple) {
s.multiple = append(s.multiple, other.multiple...)
} else {
t := make([]*spec.Schema, 0, len(s.multiple)+len(other.multiple))
s.multiple = append(append(t, s.multiple...), other.multiple...)
}
}
}
}