--- /dev/null
+'use strict';
+
+var resolve = require('./resolve');
+
+module.exports = {
+ Validation: errorSubclass(ValidationError),
+ MissingRef: errorSubclass(MissingRefError)
+};
+
+
+function ValidationError(errors) {
+ this.message = 'validation failed';
+ this.errors = errors;
+ this.ajv = this.validation = true;
+}
+
+
+MissingRefError.message = function (baseId, ref) {
+ return 'can\'t resolve reference ' + ref + ' from id ' + baseId;
+};
+
+
+function MissingRefError(baseId, ref, message) {
+ this.message = message || MissingRefError.message(baseId, ref);
+ this.missingRef = resolve.url(baseId, ref);
+ this.missingSchema = resolve.normalizeId(resolve.fullPath(this.missingRef));
+}
+
+
+function errorSubclass(Subclass) {
+ Subclass.prototype = Object.create(Error.prototype);
+ Subclass.prototype.constructor = Subclass;
+ return Subclass;
+}