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 io.prometheus.jmx.common.yaml.YamlMapAccessor; 021import java.util.Map; 022import java.util.function.Function; 023import java.util.function.Supplier; 024 025/** 026 * Class to convert an Object to a Map, throwing a RuntimeException from the Supplier if there is a 027 * ClassCastException 028 */ 029@SuppressWarnings("unchecked") 030public class ConvertToMapAccessor implements Function<Object, YamlMapAccessor> { 031 032 private final Supplier<? extends RuntimeException> supplier; 033 034 /** 035 * Constructor 036 * 037 * @param supplier supplier 038 */ 039 public ConvertToMapAccessor(Supplier<? extends RuntimeException> supplier) { 040 Precondition.notNull(supplier); 041 this.supplier = supplier; 042 } 043 044 /** 045 * Method to apply a function 046 * 047 * @param value value 048 * @return the return value 049 */ 050 @Override 051 public YamlMapAccessor apply(Object value) { 052 try { 053 return new YamlMapAccessor((Map<Object, Object>) value); 054 } catch (ClassCastException e) { 055 throw supplier.get(); 056 } 057 } 058}