validation.go - third_party/github.com/xeipuuv/gojsonschema - Git at Google

 // Copyright 2013 sigu-399 ( https://github.com/sigu-399 )
 //
 // 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.

 // author           sigu-399
 // author-github    https://github.com/sigu-399
 // author-mail      sigu.399@gmail.com
 //
 // repository-name  gojsonschema
 // repository-desc  An implementation of JSON Schema, based on IETF's draft v4 - Go language.
 //
 // description      Extends JsonSchemaDocument and jsonSchema, implements the validation phase.
 //
 // created          28-02-2013

 package gojsonschema

 import (
 	"fmt"
 	"reflect"
 	"regexp"
 	"strconv"
 	"strings"
 	"unicode/utf8"
 )

 func (v *JsonSchemaDocument) Validate(document interface{}) *ValidationResult {
 	result := &ValidationResult{}
 	context := consJsonContext(CONTEXT_ROOT, nil)
 	v.rootSchema.validateRecursive(v.rootSchema, document, result, context)
 	return result
 }

 func (v *jsonSchema) Validate(document interface{}, context *jsonContext) *ValidationResult {
 	result := &ValidationResult{}
 	v.validateRecursive(v, document, result, context)
 	return result
 }

 func convertDocumentNode(val interface{}) interface{} {
 	if lval, ok := val.([]interface{}); ok {
 		res := []interface{}{}
 		for _, v := range lval {
 			res = append(res, convertDocumentNode(v))
 		}
 		return res
 	}
 	if mval, ok := val.(map[interface{}]interface{}); ok {
 		res := map[string]interface{}{}
 		for k, v := range mval {
 			res[k.(string)] = convertDocumentNode(v)
 		}
 		return res
 	}
 	return val
 }

 // Walker function to validate the json recursively against the schema
 func (v *jsonSchema) validateRecursive(currentSchema *jsonSchema, currentNode interface{}, result *ValidationResult, context *jsonContext) {

 	// Handle referenced schemas, returns directly when a $ref is found
 	if currentSchema.refSchema != nil {
 		v.validateRecursive(currentSchema.refSchema, currentNode, result, context)
 		return
 	}

 	// Check for null value
 	if currentNode == nil {

 		if currentSchema.types.IsTyped() && !currentSchema.types.Contains(TYPE_NULL) {
 			result.addError(context, currentNode, fmt.Sprintf(ERROR_MESSAGE_MUST_BE_OF_TYPE_X, currentSchema.types.String()))
 			return
 		}

 		currentSchema.validateSchema(currentSchema, currentNode, result, context)
 		v.validateCommon(currentSchema, currentNode, result, context)

 	} else { // Not a null value

 		rValue := reflect.ValueOf(currentNode)
 		rKind := rValue.Kind()

 		switch rKind {

 		// Slice => JSON array

 		case reflect.Slice:

 			if currentSchema.types.IsTyped() && !currentSchema.types.Contains(TYPE_ARRAY) {
 				result.addError(context, currentNode, fmt.Sprintf(ERROR_MESSAGE_MUST_BE_OF_TYPE_X, currentSchema.types.String()))
 				return
 			}

 			castCurrentNode := currentNode.([]interface{})

 			currentSchema.validateSchema(currentSchema, castCurrentNode, result, context)

 			v.validateArray(currentSchema, castCurrentNode, result, context)
 			v.validateCommon(currentSchema, castCurrentNode, result, context)

 		// Map => JSON object

 		case reflect.Map:
 			if currentSchema.types.IsTyped() && !currentSchema.types.Contains(TYPE_OBJECT) {
 				result.addError(context, currentNode, fmt.Sprintf(ERROR_MESSAGE_MUST_BE_OF_TYPE_X, currentSchema.types.String()))
 				return
 			}

 			castCurrentNode, ok := currentNode.(map[string]interface{})
 			if !ok {
 				castCurrentNode = convertDocumentNode(currentNode).(map[string]interface{})
 			}

 			currentSchema.validateSchema(currentSchema, castCurrentNode, result, context)

 			v.validateObject(currentSchema, castCurrentNode, result, context)
 			v.validateCommon(currentSchema, castCurrentNode, result, context)

 			for _, pSchema := range currentSchema.propertiesChildren {
 				nextNode, ok := castCurrentNode[pSchema.property]
 				if ok {
 					subContext := consJsonContext(pSchema.property, context)
 					v.validateRecursive(pSchema, nextNode, result, subContext)
 				}
 			}

 		// Simple JSON values : string, number, boolean

 		case reflect.Bool:

 			if currentSchema.types.IsTyped() && !currentSchema.types.Contains(TYPE_BOOLEAN) {
 				result.addError(context, currentNode, fmt.Sprintf(ERROR_MESSAGE_MUST_BE_OF_TYPE_X, currentSchema.types.String()))
 				return
 			}

 			value := currentNode.(bool)

 			currentSchema.validateSchema(currentSchema, value, result, context)
 			v.validateNumber(currentSchema, value, result, context)
 			v.validateCommon(currentSchema, value, result, context)
 			v.validateString(currentSchema, value, result, context)

 		case reflect.String:

 			if currentSchema.types.IsTyped() && !currentSchema.types.Contains(TYPE_STRING) {
 				result.addError(context, currentNode, fmt.Sprintf(ERROR_MESSAGE_MUST_BE_OF_TYPE_X, currentSchema.types.String()))
 				return
 			}

 			value := currentNode.(string)

 			currentSchema.validateSchema(currentSchema, value, result, context)
 			v.validateNumber(currentSchema, value, result, context)
 			v.validateCommon(currentSchema, value, result, context)
 			v.validateString(currentSchema, value, result, context)

 		case reflect.Float64:

 			value := currentNode.(float64)

 			// Note: JSON only understand one kind of numeric ( can be float or int )
 			// JSON schema make a distinction between fload and int
 			// An integer can be a number, but a number ( with decimals ) cannot be an integer
 			isInteger := isFloat64AnInteger(value)
 			validType := currentSchema.types.Contains(TYPE_NUMBER) || (isInteger && currentSchema.types.Contains(TYPE_INTEGER))

 			if currentSchema.types.IsTyped() && !validType {
 				result.addError(context, currentNode, fmt.Sprintf(ERROR_MESSAGE_MUST_BE_OF_TYPE_X, currentSchema.types.String()))
 				return
 			}

 			currentSchema.validateSchema(currentSchema, value, result, context)
 			v.validateNumber(currentSchema, value, result, context)
 			v.validateCommon(currentSchema, value, result, context)
 			v.validateString(currentSchema, value, result, context)
 		}
 	}

 	result.incrementScore()
 }

 // Different kinds of validation there, schema / common / array / object / string...
 func (v *jsonSchema) validateSchema(currentSchema *jsonSchema, currentNode interface{}, result *ValidationResult, context *jsonContext) {

 	if len(currentSchema.anyOf) > 0 {

 		validatedAnyOf := false
 		var bestValidationResult *ValidationResult

 		for _, anyOfSchema := range currentSchema.anyOf {
 			if !validatedAnyOf {
 				validationResult := anyOfSchema.Validate(currentNode, context)
 				validatedAnyOf = validationResult.Valid()

 				if !validatedAnyOf && (bestValidationResult == nil || validationResult.score > bestValidationResult.score) {
 					bestValidationResult = validationResult
 				}
 			}
 		}
 		if !validatedAnyOf {

 			result.addError(context, currentNode, ERROR_MESSAGE_NUMBER_MUST_VALIDATE_ANYOF)

 			if bestValidationResult != nil {
 				// add error messages of closest matching schema as
 				// that's probably the one the user was trying to match
 				result.mergeErrors(bestValidationResult)
 			}
 		}
 	}

 	if len(currentSchema.oneOf) > 0 {

 		nbValidated := 0
 		var bestValidationResult *ValidationResult

 		for _, oneOfSchema := range currentSchema.oneOf {
 			validationResult := oneOfSchema.Validate(currentNode, context)
 			if validationResult.Valid() {
 				nbValidated++
 			} else if nbValidated == 0 && (bestValidationResult == nil || validationResult.score > bestValidationResult.score) {
 				bestValidationResult = validationResult
 			}
 		}

 		if nbValidated != 1 {

 			result.addError(context, currentNode, ERROR_MESSAGE_NUMBER_MUST_VALIDATE_ONEOF)

 			if nbValidated == 0 {
 				// add error messages of closest matching schema as
 				// that's probably the one the user was trying to match
 				result.mergeErrors(bestValidationResult)
 			}
 		}

 	}

 	if len(currentSchema.allOf) > 0 {
 		nbValidated := 0

 		for _, allOfSchema := range currentSchema.allOf {
 			validationResult := allOfSchema.Validate(currentNode, context)
 			if validationResult.Valid() {
 				nbValidated++
 			}
 			result.mergeErrors(validationResult)
 		}

 		if nbValidated != len(currentSchema.allOf) {
 			result.addError(context, currentNode, ERROR_MESSAGE_NUMBER_MUST_VALIDATE_ALLOF)
 		}
 	}

 	if currentSchema.not != nil {
 		validationResult := currentSchema.not.Validate(currentNode, context)
 		if validationResult.Valid() {
 			result.addError(context, currentNode, ERROR_MESSAGE_NUMBER_MUST_VALIDATE_NOT)
 		}
 	}

 	if currentSchema.dependencies != nil && len(currentSchema.dependencies) > 0 {
 		if isKind(currentNode, reflect.Map) {
 			for elementKey := range currentNode.(map[string]interface{}) {
 				if dependency, ok := currentSchema.dependencies[elementKey]; ok {
 					switch dependency := dependency.(type) {

 					case []string:
 						for _, dependOnKey := range dependency {
 							if _, dependencyResolved := currentNode.(map[string]interface{})[dependOnKey]; !dependencyResolved {
 								result.addError(context, currentNode, fmt.Sprintf(ERROR_MESSAGE_HAS_DEPENDENCY_ON, dependOnKey))
 							}
 						}

 					case *jsonSchema:
 						dependency.validateRecursive(dependency, currentNode, result, context)

 					}
 				}
 			}
 		}
 	}

 	result.incrementScore()
 }

 func (v *jsonSchema) validateCommon(currentSchema *jsonSchema, value interface{}, result *ValidationResult, context *jsonContext) {

 	// enum:
 	if len(currentSchema.enum) > 0 {
 		has, err := currentSchema.ContainsEnum(value)
 		if err != nil {
 			result.addError(context, value, fmt.Sprintf(ERROR_MESSAGE_INTERNAL, err))
 		}
 		if !has {
 			result.addError(context, value, fmt.Sprintf(ERROR_MESSAGE_MUST_MATCH_ONE_ENUM_VALUES, strings.Join(currentSchema.enum, ",")))
 		}
 	}

 	result.incrementScore()
 }

 func (v *jsonSchema) validateArray(currentSchema *jsonSchema, value []interface{}, result *ValidationResult, context *jsonContext) {

 	nbItems := len(value)

 	// TODO explain
 	if currentSchema.itemsChildrenIsSingleSchema {
 		for i := range value {
 			subContext := consJsonContext(strconv.Itoa(i), context)
 			validationResult := currentSchema.itemsChildren[0].Validate(value[i], subContext)
 			result.mergeErrors(validationResult)
 		}
 	} else {
 		if currentSchema.itemsChildren != nil && len(currentSchema.itemsChildren) > 0 {

 			nbItems := len(currentSchema.itemsChildren)
 			nbValues := len(value)

 			if nbItems == nbValues {
 				for i := 0; i != nbItems; i++ {
 					subContext := consJsonContext(strconv.Itoa(i), context)
 					validationResult := currentSchema.itemsChildren[i].Validate(value[i], subContext)
 					result.mergeErrors(validationResult)
 				}
 			} else if nbItems < nbValues {
 				switch currentSchema.additionalItems.(type) {
 				case bool:
 					if !currentSchema.additionalItems.(bool) {
 						result.addError(context, value, ERROR_MESSAGE_ARRAY_NO_ADDITIONAL_ITEM)
 					}
 				case *jsonSchema:
 					additionalItemSchema := currentSchema.additionalItems.(*jsonSchema)
 					for i := nbItems; i != nbValues; i++ {
 						subContext := consJsonContext(strconv.Itoa(i), context)
 						validationResult := additionalItemSchema.Validate(value[i], subContext)
 						result.mergeErrors(validationResult)
 					}
 				}
 			}
 		}
 	}

 	// minItems & maxItems
 	if currentSchema.minItems != nil {
 		if nbItems < *currentSchema.minItems {
 			result.addError(context, value, fmt.Sprintf(ERROR_MESSAGE_ARRAY_MIN_ITEMS, *currentSchema.minItems))
 		}
 	}
 	if currentSchema.maxItems != nil {
 		if nbItems > *currentSchema.maxItems {
 			result.addError(context, value, fmt.Sprintf(ERROR_MESSAGE_ARRAY_MAX_ITEMS, *currentSchema.maxItems))
 		}
 	}

 	// uniqueItems:
 	if currentSchema.uniqueItems {
 		var stringifiedItems []string
 		for _, v := range value {
 			vString, err := marshalToJsonString(v)
 			if err != nil {
 				result.addError(context, value, fmt.Sprintf(ERROR_MESSAGE_INTERNAL, err))
 			}
 			if isStringInSlice(stringifiedItems, *vString) {
 				result.addError(context, value, ERROR_MESSAGE_ARRAY_ITEMS_MUST_BE_UNIQUE)
 			}
 			stringifiedItems = append(stringifiedItems, *vString)
 		}
 	}

 	result.incrementScore()
 }

 func (v *jsonSchema) validateObject(currentSchema *jsonSchema, value map[string]interface{}, result *ValidationResult, context *jsonContext) {

 	// minProperties & maxProperties:
 	if currentSchema.minProperties != nil {
 		if len(value) < *currentSchema.minProperties {
 			result.addError(context, value, fmt.Sprintf(ERROR_MESSAGE_ARRAY_MIN_PROPERTIES, *currentSchema.minProperties))
 		}
 	}
 	if currentSchema.maxProperties != nil {
 		if len(value) > *currentSchema.maxProperties {
 			result.addError(context, value, fmt.Sprintf(ERROR_MESSAGE_ARRAY_MAX_PROPERTIES, *currentSchema.maxProperties))
 		}
 	}

 	// required:
 	for _, requiredProperty := range currentSchema.required {
 		_, ok := value[requiredProperty]
 		if ok {
 			result.incrementScore()
 		} else {
 			result.addError(context, value, fmt.Sprintf(ERROR_MESSAGE_X_IS_MISSING_AND_REQUIRED, fmt.Sprintf(`"%s" property`, requiredProperty)))
 		}
 	}

 	// additionalProperty & patternProperty:
 	if currentSchema.additionalProperties != nil {

 		switch currentSchema.additionalProperties.(type) {
 		case bool:

 			if !currentSchema.additionalProperties.(bool) {

 				for pk := range value {

 					found := false
 					for _, spValue := range currentSchema.propertiesChildren {
 						if pk == spValue.property {
 							found = true
 						}
 					}

 					pp_has, pp_match := v.validatePatternProperty(currentSchema, pk, value[pk], result, context)

 					if found {

 						if pp_has && !pp_match {
 							result.addError(context, value, fmt.Sprintf(ERROR_MESSAGE_ADDITIONAL_PROPERTY_NOT_ALLOWED, pk))
 						}

 					} else {

 						if !pp_has || !pp_match {
 							result.addError(context, value, fmt.Sprintf(ERROR_MESSAGE_ADDITIONAL_PROPERTY_NOT_ALLOWED, pk))
 						}

 					}
 				}
 			}

 		case *jsonSchema:

 			additionalPropertiesSchema := currentSchema.additionalProperties.(*jsonSchema)
 			for pk := range value {

 				found := false
 				for _, spValue := range currentSchema.propertiesChildren {
 					if pk == spValue.property {
 						found = true
 					}
 				}

 				pp_has, pp_match := v.validatePatternProperty(currentSchema, pk, value[pk], result, context)

 				if found {

 					if pp_has && !pp_match {
 						validationResult := additionalPropertiesSchema.Validate(value[pk], context)
 						result.mergeErrors(validationResult)
 					}

 				} else {

 					if !pp_has || !pp_match {
 						validationResult := additionalPropertiesSchema.Validate(value[pk], context)
 						result.mergeErrors(validationResult)
 					}

 				}

 			}
 		}
 	} else {

 		for pk := range value {

 			pp_has, pp_match := v.validatePatternProperty(currentSchema, pk, value[pk], result, context)

 			if pp_has && !pp_match {

 				result.addError(context, value, fmt.Sprintf(ERROR_MESSAGE_INVALID_PATTERN_PROPERTY, pk, currentSchema.PatternPropertiesString()))
 			}

 		}
 	}

 	result.incrementScore()
 }

 func (v *jsonSchema) validatePatternProperty(currentSchema *jsonSchema, key string, value interface{}, result *ValidationResult, context *jsonContext) (has bool, matched bool) {

 	has = false

 	validatedkey := false

 	for pk, pv := range currentSchema.patternProperties {
 		if matches, _ := regexp.MatchString(pk, key); matches {
 			has = true
 			subContext := consJsonContext(key, context)
 			validationResult := pv.Validate(value, subContext)
 			result.mergeErrors(validationResult)
 			if validationResult.Valid() {
 				validatedkey = true
 			}
 		}
 	}

 	if !validatedkey {
 		return has, false
 	}

 	result.incrementScore()

 	return has, true
 }

 func (v *jsonSchema) validateString(currentSchema *jsonSchema, value interface{}, result *ValidationResult, context *jsonContext) {

 	// Ignore non strings
 	if !isKind(value, reflect.String) {
 		return
 	}

 	stringValue := value.(string)

 	// minLength & maxLength:
 	if currentSchema.minLength != nil {
 		if utf8.RuneCount([]byte(stringValue)) < *currentSchema.minLength {
 			result.addError(context, value, fmt.Sprintf(ERROR_MESSAGE_STRING_LENGTH_MUST_BE_GREATER_OR_EQUAL, *currentSchema.minLength))
 		}
 	}
 	if currentSchema.maxLength != nil {
 		if utf8.RuneCount([]byte(stringValue)) > *currentSchema.maxLength {
 			result.addError(context, value, fmt.Sprintf(ERROR_MESSAGE_STRING_LENGTH_MUST_BE_LOWER_OR_EQUAL, *currentSchema.maxLength))
 		}
 	}

 	// pattern:
 	if currentSchema.pattern != nil {
 		if !currentSchema.pattern.MatchString(stringValue) {
 			result.addError(context, value, fmt.Sprintf(ERROR_MESSAGE_DOES_NOT_MATCH_PATTERN, currentSchema.pattern))

 		}
 	}

 	result.incrementScore()
 }

 func (v *jsonSchema) validateNumber(currentSchema *jsonSchema, value interface{}, result *ValidationResult, context *jsonContext) {

 	// Ignore non numbers
 	if !isKind(value, reflect.Float64) {
 		return
 	}

 	float64Value := value.(float64)

 	// multipleOf:
 	if currentSchema.multipleOf != nil {
 		if !isFloat64AnInteger(float64Value / *currentSchema.multipleOf) {
 			result.addError(context, validationErrorFormatNumber(float64Value), fmt.Sprintf(ERROR_MESSAGE_MULTIPLE_OF, validationErrorFormatNumber(*currentSchema.multipleOf)))
 		}
 	}

 	//maximum & exclusiveMaximum:
 	if currentSchema.maximum != nil {
 		if currentSchema.exclusiveMaximum {
 			if float64Value >= *currentSchema.maximum {
 				result.addError(context, validationErrorFormatNumber(float64Value), fmt.Sprintf(ERROR_MESSAGE_NUMBER_MUST_BE_LOWER_OR_EQUAL, validationErrorFormatNumber(*currentSchema.maximum)))
 			}
 		} else {
 			if float64Value > *currentSchema.maximum {
 				result.addError(context, validationErrorFormatNumber(float64Value), fmt.Sprintf(ERROR_MESSAGE_NUMBER_MUST_BE_LOWER, validationErrorFormatNumber(*currentSchema.maximum)))
 			}
 		}
 	}

 	//minimum & exclusiveMinimum:
 	if currentSchema.minimum != nil {
 		if currentSchema.exclusiveMinimum {
 			if float64Value <= *currentSchema.minimum {
 				result.addError(context, validationErrorFormatNumber(float64Value), fmt.Sprintf(ERROR_MESSAGE_NUMBER_MUST_BE_GREATER_OR_EQUAL, validationErrorFormatNumber(*currentSchema.minimum)))
 			}
 		} else {
 			if float64Value < *currentSchema.minimum {
 				result.addError(context, validationErrorFormatNumber(float64Value), fmt.Sprintf(ERROR_MESSAGE_NUMBER_MUST_BE_GREATER, validationErrorFormatNumber(*currentSchema.minimum)))
 			}
 		}
 	}

 	result.incrementScore()
 }

 type ValidationError struct {
 	Context     *jsonContext // Tree like notation of the part that failed the validation. ex (root).a.b ...
 	Description string       // A human readable error message
 	Value       interface{}  // Value given by the JSON file that is the source of the error
 }

 func (v ValidationError) String() string {

 	// as a fallback, the value is displayed go style
 	valueString := fmt.Sprintf("%v", v.Value)

 	// marshall the go value value to json
 	if v.Value == nil {
 		valueString = TYPE_NULL
 	} else {
 		if vs, err := marshalToJsonString(v.Value); err == nil {
 			if vs == nil {
 				valueString = TYPE_NULL
 			} else {
 				valueString = *vs
 			}
 		}
 	}

 	return fmt.Sprintf("%s : %s, given %s", v.Context, v.Description, valueString)
 }

 type ValidationResult struct {
 	errors []ValidationError
 	// Scores how well the validation matched. Useful in generating
 	// better error messages for anyOf and oneOf.
 	score int
 }

 func (v *ValidationResult) Valid() bool {
 	return len(v.errors) == 0
 }

 func (v *ValidationResult) Errors() []ValidationError {
 	return v.errors
 }

 func (v *ValidationResult) addError(context *jsonContext, value interface{}, description string) {
 	v.errors = append(v.errors, ValidationError{Context: context, Value: value, Description: description})
 	v.score -= 2 // results in a net -1 when added to the +1 we get at the end of the validation function
 }

 // Used to copy errors from a sub-schema to the main one
 func (v *ValidationResult) mergeErrors(otherResult *ValidationResult) {
 	v.errors = append(v.errors, otherResult.Errors()...)
 	v.score += otherResult.score
 }

 func (v *ValidationResult) incrementScore() {
 	v.score++
 }
	// Copyright 2013 sigu-399 ( https://github.com/sigu-399 )
	//
	// 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.

	// author sigu-399
	// author-github https://github.com/sigu-399
	// author-mail sigu.399@gmail.com
	//
	// repository-name gojsonschema
	// repository-desc An implementation of JSON Schema, based on IETF's draft v4 - Go language.
	//
	// description Extends JsonSchemaDocument and jsonSchema, implements the validation phase.
	//
	// created 28-02-2013

	package gojsonschema

	import (
	"fmt"
	"reflect"
	"regexp"
	"strconv"
	"strings"
	"unicode/utf8"
	)

	func (v JsonSchemaDocument) Validate(document interface{}) ValidationResult {
	result := &ValidationResult{}
	context := consJsonContext(CONTEXT_ROOT, nil)
	v.rootSchema.validateRecursive(v.rootSchema, document, result, context)
	return result
	}

	func (v jsonSchema) Validate(document interface{}, context jsonContext) *ValidationResult {
	result := &ValidationResult{}
	v.validateRecursive(v, document, result, context)
	return result
	}

	func convertDocumentNode(val interface{}) interface{} {
	if lval, ok := val.([]interface{}); ok {
	res := []interface{}{}
	for _, v := range lval {
	res = append(res, convertDocumentNode(v))
	}
	return res
	}
	if mval, ok := val.(map[interface{}]interface{}); ok {
	res := map[string]interface{}{}
	for k, v := range mval {
	res[k.(string)] = convertDocumentNode(v)
	}
	return res
	}
	return val
	}

	// Walker function to validate the json recursively against the schema
	func (v jsonSchema) validateRecursive(currentSchema jsonSchema, currentNode interface{}, result ValidationResult, context jsonContext) {

	// Handle referenced schemas, returns directly when a $ref is found
	if currentSchema.refSchema != nil {
	v.validateRecursive(currentSchema.refSchema, currentNode, result, context)
	return
	}

	// Check for null value
	if currentNode == nil {

	if currentSchema.types.IsTyped() && !currentSchema.types.Contains(TYPE_NULL) {
	result.addError(context, currentNode, fmt.Sprintf(ERROR_MESSAGE_MUST_BE_OF_TYPE_X, currentSchema.types.String()))
	return
	}

	currentSchema.validateSchema(currentSchema, currentNode, result, context)
	v.validateCommon(currentSchema, currentNode, result, context)

	} else { // Not a null value

	rValue := reflect.ValueOf(currentNode)
	rKind := rValue.Kind()

	switch rKind {

	// Slice => JSON array

	case reflect.Slice:

	if currentSchema.types.IsTyped() && !currentSchema.types.Contains(TYPE_ARRAY) {
	result.addError(context, currentNode, fmt.Sprintf(ERROR_MESSAGE_MUST_BE_OF_TYPE_X, currentSchema.types.String()))
	return
	}

	castCurrentNode := currentNode.([]interface{})

	currentSchema.validateSchema(currentSchema, castCurrentNode, result, context)

	v.validateArray(currentSchema, castCurrentNode, result, context)
	v.validateCommon(currentSchema, castCurrentNode, result, context)

	// Map => JSON object

	case reflect.Map:
	if currentSchema.types.IsTyped() && !currentSchema.types.Contains(TYPE_OBJECT) {
	result.addError(context, currentNode, fmt.Sprintf(ERROR_MESSAGE_MUST_BE_OF_TYPE_X, currentSchema.types.String()))
	return
	}

	castCurrentNode, ok := currentNode.(map[string]interface{})
	if !ok {
	castCurrentNode = convertDocumentNode(currentNode).(map[string]interface{})
	}

	currentSchema.validateSchema(currentSchema, castCurrentNode, result, context)

	v.validateObject(currentSchema, castCurrentNode, result, context)
	v.validateCommon(currentSchema, castCurrentNode, result, context)

	for _, pSchema := range currentSchema.propertiesChildren {
	nextNode, ok := castCurrentNode[pSchema.property]
	if ok {
	subContext := consJsonContext(pSchema.property, context)
	v.validateRecursive(pSchema, nextNode, result, subContext)
	}
	}

	// Simple JSON values : string, number, boolean

	case reflect.Bool:

	if currentSchema.types.IsTyped() && !currentSchema.types.Contains(TYPE_BOOLEAN) {
	result.addError(context, currentNode, fmt.Sprintf(ERROR_MESSAGE_MUST_BE_OF_TYPE_X, currentSchema.types.String()))
	return
	}

	value := currentNode.(bool)

	currentSchema.validateSchema(currentSchema, value, result, context)
	v.validateNumber(currentSchema, value, result, context)
	v.validateCommon(currentSchema, value, result, context)
	v.validateString(currentSchema, value, result, context)

	case reflect.String:

	if currentSchema.types.IsTyped() && !currentSchema.types.Contains(TYPE_STRING) {
	result.addError(context, currentNode, fmt.Sprintf(ERROR_MESSAGE_MUST_BE_OF_TYPE_X, currentSchema.types.String()))
	return
	}

	value := currentNode.(string)

	currentSchema.validateSchema(currentSchema, value, result, context)
	v.validateNumber(currentSchema, value, result, context)
	v.validateCommon(currentSchema, value, result, context)
	v.validateString(currentSchema, value, result, context)

	case reflect.Float64:

	value := currentNode.(float64)

	// Note: JSON only understand one kind of numeric ( can be float or int )
	// JSON schema make a distinction between fload and int
	// An integer can be a number, but a number ( with decimals ) cannot be an integer
	isInteger := isFloat64AnInteger(value)
	validType := currentSchema.types.Contains(TYPE_NUMBER) \|\| (isInteger && currentSchema.types.Contains(TYPE_INTEGER))

	if currentSchema.types.IsTyped() && !validType {
	result.addError(context, currentNode, fmt.Sprintf(ERROR_MESSAGE_MUST_BE_OF_TYPE_X, currentSchema.types.String()))
	return
	}

	currentSchema.validateSchema(currentSchema, value, result, context)
	v.validateNumber(currentSchema, value, result, context)
	v.validateCommon(currentSchema, value, result, context)
	v.validateString(currentSchema, value, result, context)
	}
	}

	result.incrementScore()
	}

	// Different kinds of validation there, schema / common / array / object / string...
	func (v jsonSchema) validateSchema(currentSchema jsonSchema, currentNode interface{}, result ValidationResult, context jsonContext) {

	if len(currentSchema.anyOf) > 0 {

	validatedAnyOf := false
	var bestValidationResult *ValidationResult

	for _, anyOfSchema := range currentSchema.anyOf {
	if !validatedAnyOf {
	validationResult := anyOfSchema.Validate(currentNode, context)
	validatedAnyOf = validationResult.Valid()

	if !validatedAnyOf && (bestValidationResult == nil \|\| validationResult.score > bestValidationResult.score) {
	bestValidationResult = validationResult
	}
	}
	}
	if !validatedAnyOf {

	result.addError(context, currentNode, ERROR_MESSAGE_NUMBER_MUST_VALIDATE_ANYOF)

	if bestValidationResult != nil {
	// add error messages of closest matching schema as
	// that's probably the one the user was trying to match
	result.mergeErrors(bestValidationResult)
	}
	}
	}

	if len(currentSchema.oneOf) > 0 {

	nbValidated := 0
	var bestValidationResult *ValidationResult

	for _, oneOfSchema := range currentSchema.oneOf {
	validationResult := oneOfSchema.Validate(currentNode, context)
	if validationResult.Valid() {
	nbValidated++
	} else if nbValidated == 0 && (bestValidationResult == nil \|\| validationResult.score > bestValidationResult.score) {
	bestValidationResult = validationResult
	}
	}

	if nbValidated != 1 {

	result.addError(context, currentNode, ERROR_MESSAGE_NUMBER_MUST_VALIDATE_ONEOF)

	if nbValidated == 0 {
	// add error messages of closest matching schema as
	// that's probably the one the user was trying to match
	result.mergeErrors(bestValidationResult)
	}
	}

	}

	if len(currentSchema.allOf) > 0 {
	nbValidated := 0

	for _, allOfSchema := range currentSchema.allOf {
	validationResult := allOfSchema.Validate(currentNode, context)
	if validationResult.Valid() {
	nbValidated++
	}
	result.mergeErrors(validationResult)
	}

	if nbValidated != len(currentSchema.allOf) {
	result.addError(context, currentNode, ERROR_MESSAGE_NUMBER_MUST_VALIDATE_ALLOF)
	}
	}

	if currentSchema.not != nil {
	validationResult := currentSchema.not.Validate(currentNode, context)
	if validationResult.Valid() {
	result.addError(context, currentNode, ERROR_MESSAGE_NUMBER_MUST_VALIDATE_NOT)
	}
	}

	if currentSchema.dependencies != nil && len(currentSchema.dependencies) > 0 {
	if isKind(currentNode, reflect.Map) {
	for elementKey := range currentNode.(map[string]interface{}) {
	if dependency, ok := currentSchema.dependencies[elementKey]; ok {
	switch dependency := dependency.(type) {

	case []string:
	for _, dependOnKey := range dependency {
	if _, dependencyResolved := currentNode.(map[string]interface{})[dependOnKey]; !dependencyResolved {
	result.addError(context, currentNode, fmt.Sprintf(ERROR_MESSAGE_HAS_DEPENDENCY_ON, dependOnKey))
	}
	}

	case *jsonSchema:
	dependency.validateRecursive(dependency, currentNode, result, context)

	}
	}
	}
	}
	}

	result.incrementScore()
	}

	func (v jsonSchema) validateCommon(currentSchema jsonSchema, value interface{}, result ValidationResult, context jsonContext) {

	// enum:
	if len(currentSchema.enum) > 0 {
	has, err := currentSchema.ContainsEnum(value)
	if err != nil {
	result.addError(context, value, fmt.Sprintf(ERROR_MESSAGE_INTERNAL, err))
	}
	if !has {
	result.addError(context, value, fmt.Sprintf(ERROR_MESSAGE_MUST_MATCH_ONE_ENUM_VALUES, strings.Join(currentSchema.enum, ",")))
	}
	}

	result.incrementScore()
	}

	func (v jsonSchema) validateArray(currentSchema jsonSchema, value []interface{}, result ValidationResult, context jsonContext) {

	nbItems := len(value)

	// TODO explain
	if currentSchema.itemsChildrenIsSingleSchema {
	for i := range value {
	subContext := consJsonContext(strconv.Itoa(i), context)
	validationResult := currentSchema.itemsChildren[0].Validate(value[i], subContext)
	result.mergeErrors(validationResult)
	}
	} else {
	if currentSchema.itemsChildren != nil && len(currentSchema.itemsChildren) > 0 {

	nbItems := len(currentSchema.itemsChildren)
	nbValues := len(value)

	if nbItems == nbValues {
	for i := 0; i != nbItems; i++ {
	subContext := consJsonContext(strconv.Itoa(i), context)
	validationResult := currentSchema.itemsChildren[i].Validate(value[i], subContext)
	result.mergeErrors(validationResult)
	}
	} else if nbItems < nbValues {
	switch currentSchema.additionalItems.(type) {
	case bool:
	if !currentSchema.additionalItems.(bool) {
	result.addError(context, value, ERROR_MESSAGE_ARRAY_NO_ADDITIONAL_ITEM)
	}
	case *jsonSchema:
	additionalItemSchema := currentSchema.additionalItems.(*jsonSchema)
	for i := nbItems; i != nbValues; i++ {
	subContext := consJsonContext(strconv.Itoa(i), context)
	validationResult := additionalItemSchema.Validate(value[i], subContext)
	result.mergeErrors(validationResult)
	}
	}
	}
	}
	}

	// minItems & maxItems
	if currentSchema.minItems != nil {
	if nbItems < *currentSchema.minItems {
	result.addError(context, value, fmt.Sprintf(ERROR_MESSAGE_ARRAY_MIN_ITEMS, *currentSchema.minItems))
	}
	}
	if currentSchema.maxItems != nil {
	if nbItems > *currentSchema.maxItems {
	result.addError(context, value, fmt.Sprintf(ERROR_MESSAGE_ARRAY_MAX_ITEMS, *currentSchema.maxItems))
	}
	}

	// uniqueItems:
	if currentSchema.uniqueItems {
	var stringifiedItems []string
	for _, v := range value {
	vString, err := marshalToJsonString(v)
	if err != nil {
	result.addError(context, value, fmt.Sprintf(ERROR_MESSAGE_INTERNAL, err))
	}
	if isStringInSlice(stringifiedItems, *vString) {
	result.addError(context, value, ERROR_MESSAGE_ARRAY_ITEMS_MUST_BE_UNIQUE)
	}
	stringifiedItems = append(stringifiedItems, *vString)
	}
	}

	result.incrementScore()
	}

	func (v jsonSchema) validateObject(currentSchema jsonSchema, value map[string]interface{}, result ValidationResult, context jsonContext) {

	// minProperties & maxProperties:
	if currentSchema.minProperties != nil {
	if len(value) < *currentSchema.minProperties {
	result.addError(context, value, fmt.Sprintf(ERROR_MESSAGE_ARRAY_MIN_PROPERTIES, *currentSchema.minProperties))
	}
	}
	if currentSchema.maxProperties != nil {
	if len(value) > *currentSchema.maxProperties {
	result.addError(context, value, fmt.Sprintf(ERROR_MESSAGE_ARRAY_MAX_PROPERTIES, *currentSchema.maxProperties))
	}
	}

	// required:
	for _, requiredProperty := range currentSchema.required {
	_, ok := value[requiredProperty]
	if ok {
	result.incrementScore()
	} else {
	result.addError(context, value, fmt.Sprintf(ERROR_MESSAGE_X_IS_MISSING_AND_REQUIRED, fmt.Sprintf(`"%s" property`, requiredProperty)))
	}
	}

	// additionalProperty & patternProperty:
	if currentSchema.additionalProperties != nil {

	switch currentSchema.additionalProperties.(type) {
	case bool:

	if !currentSchema.additionalProperties.(bool) {

	for pk := range value {

	found := false
	for _, spValue := range currentSchema.propertiesChildren {
	if pk == spValue.property {
	found = true
	}
	}

	pp_has, pp_match := v.validatePatternProperty(currentSchema, pk, value[pk], result, context)

	if found {

	if pp_has && !pp_match {
	result.addError(context, value, fmt.Sprintf(ERROR_MESSAGE_ADDITIONAL_PROPERTY_NOT_ALLOWED, pk))
	}

	} else {

	if !pp_has \|\| !pp_match {
	result.addError(context, value, fmt.Sprintf(ERROR_MESSAGE_ADDITIONAL_PROPERTY_NOT_ALLOWED, pk))
	}

	}
	}
	}

	case *jsonSchema:

	additionalPropertiesSchema := currentSchema.additionalProperties.(*jsonSchema)
	for pk := range value {

	found := false
	for _, spValue := range currentSchema.propertiesChildren {
	if pk == spValue.property {
	found = true
	}
	}

	pp_has, pp_match := v.validatePatternProperty(currentSchema, pk, value[pk], result, context)

	if found {

	if pp_has && !pp_match {
	validationResult := additionalPropertiesSchema.Validate(value[pk], context)
	result.mergeErrors(validationResult)
	}

	} else {

	if !pp_has \|\| !pp_match {
	validationResult := additionalPropertiesSchema.Validate(value[pk], context)
	result.mergeErrors(validationResult)
	}

	}

	}
	}
	} else {

	for pk := range value {

	pp_has, pp_match := v.validatePatternProperty(currentSchema, pk, value[pk], result, context)

	if pp_has && !pp_match {

	result.addError(context, value, fmt.Sprintf(ERROR_MESSAGE_INVALID_PATTERN_PROPERTY, pk, currentSchema.PatternPropertiesString()))
	}

	}
	}

	result.incrementScore()
	}

	func (v jsonSchema) validatePatternProperty(currentSchema jsonSchema, key string, value interface{}, result ValidationResult, context jsonContext) (has bool, matched bool) {

	has = false

	validatedkey := false

	for pk, pv := range currentSchema.patternProperties {
	if matches, _ := regexp.MatchString(pk, key); matches {
	has = true
	subContext := consJsonContext(key, context)
	validationResult := pv.Validate(value, subContext)
	result.mergeErrors(validationResult)
	if validationResult.Valid() {
	validatedkey = true
	}
	}
	}

	if !validatedkey {
	return has, false
	}

	result.incrementScore()

	return has, true
	}

	func (v jsonSchema) validateString(currentSchema jsonSchema, value interface{}, result ValidationResult, context jsonContext) {

	// Ignore non strings
	if !isKind(value, reflect.String) {
	return
	}

	stringValue := value.(string)

	// minLength & maxLength:
	if currentSchema.minLength != nil {
	if utf8.RuneCount([]byte(stringValue)) < *currentSchema.minLength {
	result.addError(context, value, fmt.Sprintf(ERROR_MESSAGE_STRING_LENGTH_MUST_BE_GREATER_OR_EQUAL, *currentSchema.minLength))
	}
	}
	if currentSchema.maxLength != nil {
	if utf8.RuneCount([]byte(stringValue)) > *currentSchema.maxLength {
	result.addError(context, value, fmt.Sprintf(ERROR_MESSAGE_STRING_LENGTH_MUST_BE_LOWER_OR_EQUAL, *currentSchema.maxLength))
	}
	}

	// pattern:
	if currentSchema.pattern != nil {
	if !currentSchema.pattern.MatchString(stringValue) {
	result.addError(context, value, fmt.Sprintf(ERROR_MESSAGE_DOES_NOT_MATCH_PATTERN, currentSchema.pattern))

	}
	}

	result.incrementScore()
	}

	func (v jsonSchema) validateNumber(currentSchema jsonSchema, value interface{}, result ValidationResult, context jsonContext) {

	// Ignore non numbers
	if !isKind(value, reflect.Float64) {
	return
	}

	float64Value := value.(float64)

	// multipleOf:
	if currentSchema.multipleOf != nil {
	if !isFloat64AnInteger(float64Value / *currentSchema.multipleOf) {
	result.addError(context, validationErrorFormatNumber(float64Value), fmt.Sprintf(ERROR_MESSAGE_MULTIPLE_OF, validationErrorFormatNumber(*currentSchema.multipleOf)))
	}
	}

	//maximum & exclusiveMaximum:
	if currentSchema.maximum != nil {
	if currentSchema.exclusiveMaximum {
	if float64Value >= *currentSchema.maximum {
	result.addError(context, validationErrorFormatNumber(float64Value), fmt.Sprintf(ERROR_MESSAGE_NUMBER_MUST_BE_LOWER_OR_EQUAL, validationErrorFormatNumber(*currentSchema.maximum)))
	}
	} else {
	if float64Value > *currentSchema.maximum {
	result.addError(context, validationErrorFormatNumber(float64Value), fmt.Sprintf(ERROR_MESSAGE_NUMBER_MUST_BE_LOWER, validationErrorFormatNumber(*currentSchema.maximum)))
	}
	}
	}

	//minimum & exclusiveMinimum:
	if currentSchema.minimum != nil {
	if currentSchema.exclusiveMinimum {
	if float64Value <= *currentSchema.minimum {
	result.addError(context, validationErrorFormatNumber(float64Value), fmt.Sprintf(ERROR_MESSAGE_NUMBER_MUST_BE_GREATER_OR_EQUAL, validationErrorFormatNumber(*currentSchema.minimum)))
	}
	} else {
	if float64Value < *currentSchema.minimum {
	result.addError(context, validationErrorFormatNumber(float64Value), fmt.Sprintf(ERROR_MESSAGE_NUMBER_MUST_BE_GREATER, validationErrorFormatNumber(*currentSchema.minimum)))
	}
	}
	}

	result.incrementScore()
	}

	type ValidationError struct {
	Context *jsonContext // Tree like notation of the part that failed the validation. ex (root).a.b ...
	Description string // A human readable error message
	Value interface{} // Value given by the JSON file that is the source of the error
	}

	func (v ValidationError) String() string {

	// as a fallback, the value is displayed go style
	valueString := fmt.Sprintf("%v", v.Value)

	// marshall the go value value to json
	if v.Value == nil {
	valueString = TYPE_NULL
	} else {
	if vs, err := marshalToJsonString(v.Value); err == nil {
	if vs == nil {
	valueString = TYPE_NULL
	} else {
	valueString = *vs
	}
	}
	}

	return fmt.Sprintf("%s : %s, given %s", v.Context, v.Description, valueString)
	}

	type ValidationResult struct {
	errors []ValidationError
	// Scores how well the validation matched. Useful in generating
	// better error messages for anyOf and oneOf.
	score int
	}

	func (v *ValidationResult) Valid() bool {
	return len(v.errors) == 0
	}

	func (v *ValidationResult) Errors() []ValidationError {
	return v.errors
	}

	func (v ValidationResult) addError(context jsonContext, value interface{}, description string) {
	v.errors = append(v.errors, ValidationError{Context: context, Value: value, Description: description})
	v.score -= 2 // results in a net -1 when added to the +1 we get at the end of the validation function
	}

	// Used to copy errors from a sub-schema to the main one
	func (v ValidationResult) mergeErrors(otherResult ValidationResult) {
	v.errors = append(v.errors, otherResult.Errors()...)
	v.score += otherResult.score
	}

	func (v *ValidationResult) incrementScore() {
	v.score++
	}