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207 lines
7.7 KiB
JavaScript
207 lines
7.7 KiB
JavaScript
15 years ago
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dojo.provide("dojox.json.schema");
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dojox.json.schema.validate = function(/*Any*/instance,/*Object*/schema){
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// summary:
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// To use the validator call this with an instance object and an optional schema object.
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// If a schema is provided, it will be used to validate. If the instance object refers to a schema (self-validating),
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// that schema will be used to validate and the schema parameter is not necessary (if both exist,
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// both validations will occur).
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// instance:
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// The instance value/object to validate
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// schema:
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// The schema to use to validate
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// description:
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// The validate method will return an object with two properties:
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// valid: A boolean indicating if the instance is valid by the schema
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// errors: An array of validation errors. If there are no errors, then an
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// empty list will be returned. A validation error will have two properties:
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// property: which indicates which property had the error
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// message: which indicates what the error was
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//
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return this._validate(instance,schema,false);
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};
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dojox.json.schema.checkPropertyChange = function(/*Any*/value,/*Object*/schema){
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// summary:
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// The checkPropertyChange method will check to see if an value can legally be in property with the given schema
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// This is slightly different than the validate method in that it will fail if the schema is readonly and it will
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// not check for self-validation, it is assumed that the passed in value is already internally valid.
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// The checkPropertyChange method will return the same object type as validate, see JSONSchema.validate for
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// information.
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// value:
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// The new instance value/object to check
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// schema:
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// The schema to use to validate
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// return:
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// see dojox.validate.jsonSchema.validate
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//
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return this._validate(value,schema,true);
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};
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dojox.json.schema.mustBeValid = function(result){
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// summary:
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// This checks to ensure that the result is valid and will throw an appropriate error message if it is not
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// result: the result returned from checkPropertyChange or validate
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if(!result.valid){
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throw new Error(dojo.map(result.errors,function(error){return error.property + ' ' + error.message;}).join(","));
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}
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}
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dojox.json.schema._validate = function(/*Any*/instance,/*Object*/schema,/*Boolean*/ _changing){
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var errors = [];
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// validate a value against a property definition
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function checkProp(value, schema, path,i){
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if(typeof schema != 'object'){
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return null;
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}
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path += path ? typeof i == 'number' ? '[' + i + ']' : typeof i == 'undefined' ? '' : '.' + i : i;
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function addError(message){
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errors.push({property:path,message:message});
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}
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if(_changing && schema.readonly){
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addError("is a readonly field, it can not be changed");
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}
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if(schema instanceof Array){
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if(!(value instanceof Array)){
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return [{property:path,message:"An array tuple is required"}];
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}
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for(i =0; i < schema.length; i++){
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errors.concat(checkProp(value[i],schema[i],path,i));
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}
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return errors;
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}
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if(schema['extends']){ // if it extends another schema, it must pass that schema as well
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checkProp(value,schema['extends'],path,i);
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}
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// validate a value against a type definition
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function checkType(type,value){
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if(type){
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if(typeof type == 'string' && type != 'any' &&
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(type == 'null' ? value !== null : typeof value != type) &&
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!(value instanceof Array && type == 'array') &&
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!(type == 'integer' && value%1===0)){
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return [{property:path,message:(typeof value) + " value found, but a " + type + " is required"}];
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}
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if(type instanceof Array){
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var unionErrors=[];
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for(var j = 0; j < type.length; j++){ // a union type
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if(!(unionErrors=checkType(type[j],value)).length){
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break;
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}
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}
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if(unionErrors.length){
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return unionErrors;
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}
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}else if(typeof type == 'object'){
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checkProp(value,type,path);
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}
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}
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return [];
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}
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if(value !== null){
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if(value === undefined){
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if(!schema.optional){
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addError("is missing and it is not optional");
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}
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}else{
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errors = errors.concat(checkType(schema.type,value));
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if(schema.disallow && !checkType(schema.disallow,value).length){
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addError(" disallowed value was matched");
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}
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if(value instanceof Array){
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if(schema.items){
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for(i=0,l=value.length; i<l; i++){
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errors.concat(checkProp(value[i],schema.items,path,i));
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}
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}
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if(schema.minItems && value.length < schema.minItems){
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addError("There must be a minimum of " + schema.minItems + " in the array");
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}
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if(schema.maxItems && value.length > schema.maxItems){
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addError("There must be a maximum of " + schema.maxItems + " in the array");
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}
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}else if(schema.properties && typeof value == 'object'){
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errors.concat(checkObj(value,schema.properties,path,schema.additionalProperties));
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}
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if(schema.pattern && typeof value == 'string' && !value.match(schema.pattern)){
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addError("does not match the regex pattern " + schema.pattern);
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}
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if(schema.maxLength && typeof value == 'string' && value.length > schema.maxLength){
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addError("may only be " + schema.maxLength + " characters long");
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}
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if(schema.minLength && typeof value == 'string' && value.length < schema.minLength){
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addError("must be at least " + schema.minLength + " characters long");
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}
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if(typeof schema.minimum !== undefined && typeof value == typeof schema.minimum &&
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schema.minimum > value){
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addError("must have a minimum value of " + schema.minimum);
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}
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if(typeof schema.maximum !== undefined && typeof value == typeof schema.maximum &&
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schema.maximum < value){
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addError("must have a maximum value of " + schema.maximum);
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}
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if(schema['enum']){
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var enumer = schema['enum'];
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l = enumer.length;
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var found;
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for(var j = 0; j < l; j++){
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if(enumer[j]===value){
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found=1;
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break;
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}
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}
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if(!found){
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addError("does not have a value in the enumeration " + enumer.join(", "));
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}
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}
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if(typeof schema.maxDecimal == 'number' && (value * 10^schema.maxDecimal)%1){
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addError("may only have " + schema.maxDecimal + " digits of decimal places");
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}
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}
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}
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return null;
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}
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// validate an object against a schema
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function checkObj(instance,objTypeDef,path,additionalProp){
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if(typeof objTypeDef =='object'){
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if(typeof instance != 'object' || instance instanceof Array){
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errors.push({property:path,message:"an object is required"});
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}
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for(var i in objTypeDef){
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if(objTypeDef.hasOwnProperty(i)){
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var value = instance[i];
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var propDef = objTypeDef[i];
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checkProp(value,propDef,path,i);
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}
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}
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}
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for(i in instance){
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if(instance.hasOwnProperty(i) && (i.charAt(0) != '_' || i.charAt(0) != '_') && objTypeDef && !objTypeDef[i] && additionalProp===false){
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errors.push({property:path,message:(typeof value) + "The property " + i +
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" is not defined in the schema and the schema does not allow additional properties"});
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}
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var requires = objTypeDef && objTypeDef[i] && objTypeDef[i].requires;
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if(requires && !(requires in instance)){
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errors.push({property:path,message:"the presence of the property " + i + " requires that " + requires + " also be present"});
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}
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value = instance[i];
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if(objTypeDef && typeof objTypeDef == 'object' && !(i in objTypeDef)){
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checkProp(value,additionalProp,path,i);
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}
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if(!_changing && value && value.$schema){
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errors = errors.concat(checkProp(value,value.$schema,path,i));
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}
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}
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return errors;
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}
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if(schema){
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checkProp(instance,schema,'','');
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}
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if(!_changing && instance.$schema){
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checkProp(instance,instance.$schema,'','');
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}
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return {valid:!errors.length,errors:errors};
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};
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