/*

* SPDX-License-Identifier: Apache-2.0

* Copyright 2018-2019 The Feast Authors

*

* 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

*

* https://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 feast.core.validators;

import java.util.regex.Pattern;

public class Matchers {

private static Pattern UPPER_SNAKE_CASE_REGEX = Pattern.compile("^[A-Z0-9]+(_[A-Z0-9]+)*$");

private static Pattern LOWER_SNAKE_CASE_REGEX = Pattern.compile("^[a-z0-9]+(_[a-z0-9]+)*$");

private static Pattern VALID_CHARACTERS_REGEX = Pattern.compile("^[a-zA-Z0-9\\-_]*$");

private static Pattern VALID_CHARACTERS_REGEX_WITH_ASTERISK_WILDCARD =

Pattern.compile("^[a-zA-Z0-9\\-_*]*$");

private static String ERROR_MESSAGE_TEMPLATE = "invalid value for field %s: %s";

public static void checkUpperSnakeCase(String input, String fieldName)

throws IllegalArgumentException {

if (!UPPER_SNAKE_CASE_REGEX.matcher(input).matches()) {

throw new IllegalArgumentException(

String.format(

ERROR_MESSAGE_TEMPLATE,

fieldName,

"argument must be in upper snake case, and cannot include any special characters."));

}

}

public static void checkLowerSnakeCase(String input, String fieldName)

throws IllegalArgumentException {

if (!LOWER_SNAKE_CASE_REGEX.matcher(input).matches()) {

throw new IllegalArgumentException(

String.format(

ERROR_MESSAGE_TEMPLATE,

fieldName,

"argument must be in lower snake case, and cannot include any special characters."));

}

}

public static void checkValidCharacters(String input, String fieldName)

throws IllegalArgumentException {

if (!VALID_CHARACTERS_REGEX.matcher(input).matches()) {

throw new IllegalArgumentException(

String.format(

ERROR_MESSAGE_TEMPLATE,

fieldName,

"argument must only contain alphanumeric characters, dashes and underscores."));

}

}

public static void checkValidCharactersAllowAsterisk(String input, String fieldName)

throws IllegalArgumentException {

if (!VALID_CHARACTERS_REGEX_WITH_ASTERISK_WILDCARD.matcher(input).matches()) {

throw new IllegalArgumentException(

String.format(

ERROR_MESSAGE_TEMPLATE,

fieldName,

"argument must only contain alphanumeric characters, dashes, underscores, or an asterisk."));

}

}

}