001/*
002 * Copyright (C) 2023-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.configuration;
018
019import io.prometheus.jmx.common.util.Precondition;
020import java.util.function.Function;
021import java.util.function.Supplier;
022
023public class ConvertToInteger implements Function<Object, Integer> {
024
025    private final Supplier<? extends RuntimeException> supplier;
026
027    /**
028     * Constructor
029     *
030     * @param supplier supplier
031     */
032    public ConvertToInteger(Supplier<? extends RuntimeException> supplier) {
033        Precondition.notNull(supplier);
034        this.supplier = supplier;
035    }
036
037    /**
038     * Method to apply a function
039     *
040     * @param value value
041     * @return the return value
042     */
043    @Override
044    public Integer apply(Object value) {
045        if (value == null) {
046            throw new IllegalArgumentException();
047        }
048
049        try {
050            return Integer.parseInt(value.toString());
051        } catch (Throwable t) {
052            throw supplier.get();
053        }
054    }
055}