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- /*
- * Copyright 2015-present Facebook, Inc.
- *
- * 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.
- */
- #pragma once
- #include <folly/ExceptionWrapper.h>
- #include <folly/Range.h>
- #include <folly/dynamic.h>
- /**
- * Validation according to the draft v4 standard: http://json-schema.org/
- *
- * If your schema is invalid, then it won't validate anything. For example, if
- * you set "type": "invalid_type" in your schema, then it won't check for any
- * type, as if you had left that property out. If you want to make sure your
- * schema is valid, you can optionally validate it first according to the
- * metaschema.
- *
- * Limitations:
- * - We don't support fetching schemas via HTTP.
- * - We don't support remote $refs.
- * - We don't support $ref via id (only by path).
- * - We don't support UTF-8 for string lengths, i.e. we will count bytes for
- * schemas that use minLength/maxLength.
- */
- namespace folly {
- namespace jsonschema {
- /**
- * Interface for a schema validator.
- */
- struct Validator {
- virtual ~Validator() = 0;
- /**
- * Check whether the given value passes the schema. Throws if it fails.
- */
- virtual void validate(const dynamic& value) const = 0;
- /**
- * Check whether the given value passes the schema. Returns an
- * exception_wrapper indicating success or what the failure was.
- */
- virtual exception_wrapper try_validate(const dynamic& value) const
- noexcept = 0;
- };
- /**
- * Make a validator that can be used to check various json. Thread-safe.
- */
- std::unique_ptr<Validator> makeValidator(const dynamic& schema);
- /**
- * Makes a validator for schemas. You should probably check your schema with
- * this before you use makeValidator().
- */
- std::shared_ptr<Validator> makeSchemaValidator();
- } // namespace jsonschema
- } // namespace folly
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