001/*
002 * Copyright (C) 2022-present The Prometheus jmx_exporter Authors
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package io.prometheus.jmx.common.util;
018
019public class Precondition {
020
021    private Precondition() {
022        // DO NOTHING
023    }
024
025    /**
026     * Method to check an Object is not null
027     *
028     * @param object object
029     */
030    public static void notNull(Object object) {
031        notNull(object, "object is null");
032    }
033
034    /**
035     * Method to check an Object is not null
036     *
037     * @param object object
038     * @param message message
039     */
040    public static void notNull(Object object, String message) {
041        if (object == null) {
042            throw new IllegalArgumentException(message);
043        }
044    }
045
046    /**
047     * Method to check that a String is not null and not empty
048     *
049     * @param string string
050     */
051    public static void notNullOrEmpty(String string) {
052        notNullOrEmpty(string, String.format("string [%s] is null or empty", string));
053    }
054
055    /**
056     * Method to check that a String is not null and not empty
057     *
058     * @param string string
059     * @param message message
060     */
061    public static void notNullOrEmpty(String string, String message) {
062        if (string == null || string.trim().isEmpty()) {
063            throw new IllegalArgumentException(message);
064        }
065    }
066
067    /**
068     * Method to check that an integer is greater than or equal to a value
069     *
070     * @param value value
071     * @param minimumValue minimumValue
072     */
073    public static void isGreaterThanOrEqualTo(int value, int minimumValue) {
074        isGreaterThanOrEqualTo(
075                value,
076                minimumValue,
077                String.format("value [%s] is less than minimum value [%s]", value, minimumValue));
078    }
079
080    /**
081     * Method to check that an integer is greater than or equal to a value
082     *
083     * @param value value
084     * @param minimumValue minimumValue
085     * @param message message
086     */
087    public static void isGreaterThanOrEqualTo(int value, int minimumValue, String message) {
088        if (value < minimumValue) {
089            throw new IllegalArgumentException(message);
090        }
091    }
092}