001/*
002 * Copyright © 2018. Sir Wellington.
003 * Licensed under the Apache License, Version 2.0 (the "License");
004 * you may not use this file except in compliance with the License.
005 *
006 * You may obtain a copy of the License at
007 *     http://www.apache.org/licenses/LICENSE-2.0
008 *
009 * Unless required by applicable law or agreed to in writing, software
010 * distributed under the License is distributed on an "AS IS" BASIS,
011 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012 * See the License for the specific language governing permissions and
013 * limitations under the License.
014 */
015package tech.sirwellington.alchemy.test;
016
017import org.slf4j.Logger;
018import org.slf4j.LoggerFactory;
019import tech.sirwellington.alchemy.annotations.access.NonInstantiable;
020
021/**
022 * Used internally to perform argument checks.
023 *
024 * @author SirWellington
025 */
026@tech.sirwellington.alchemy.annotations.access.Internal
027@NonInstantiable
028public final class Checks
029{
030
031    private final static Logger LOG = LoggerFactory.getLogger(Checks.class);
032
033    Checks() throws IllegalAccessException
034    {
035        throw new IllegalAccessException("cannot instantiate");
036    }
037
038    @tech.sirwellington.alchemy.annotations.access.Internal
039    @NonInstantiable
040    public static class Internal
041    {
042
043        Internal() throws IllegalAccessException
044        {
045            throw new IllegalAccessException("cannot instantiate");
046        }
047
048        public static void checkNotNull(Object ref) throws IllegalArgumentException
049        {
050            checkNotNull(ref, "");
051        }
052
053        public static void checkNotNull(Object ref, String message) throws IllegalArgumentException
054        {
055            if (ref == null)
056            {
057                throw new IllegalArgumentException(message);
058            }
059        }
060
061        public static void checkThat(boolean predicate) throws IllegalArgumentException
062        {
063            checkThat(predicate, "");
064        }
065
066        public static void checkThat(boolean predicate, String message) throws IllegalArgumentException
067        {
068            if (!predicate)
069            {
070                throw new IllegalArgumentException(message);
071            }
072        }
073    }
074
075}