001package ca.uhn.fhir.util;
002
003/*-
004 * #%L
005 * HAPI FHIR - Core Library
006 * %%
007 * Copyright (C) 2014 - 2025 Smile CDR, Inc.
008 * %%
009 * Licensed under the Apache License, Version 2.0 (the "License");
010 * you may not use this file except in compliance with the License.
011 * You may obtain a copy of the License at
012 *
013 *      http://www.apache.org/licenses/LICENSE-2.0
014 *
015 * Unless required by applicable law or agreed to in writing, software
016 * distributed under the License is distributed on an "AS IS" BASIS,
017 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
018 * See the License for the specific language governing permissions and
019 * limitations under the License.
020 * #L%
021 */
022
023import org.slf4j.Logger;
024
025import java.util.Optional;
026
027public class IoUtils {
028
029        private IoUtils() {}
030
031        /**
032         * Replacement for the deprecated commons-lang method of the same name. Use sparingly
033         * since they are right that most uses of this should be replaced with try-with-resources
034         */
035        public static void closeQuietly(final AutoCloseable theCloseable) {
036                closeQuietly(theCloseable, null);
037        }
038        /**
039         * Closes quietly logging exceptions if any
040         *
041         * @param theCloseable Closeable instance to be closed
042         * @param theLog       Logger to log a potential exception
043         */
044        public static void closeQuietly(AutoCloseable theCloseable, Logger theLog) {
045                try {
046                        if (theCloseable != null) {
047                                theCloseable.close();
048                        }
049                } catch (Throwable tx) {
050                        if (theLog != null) {
051                                theLog.warn("Unable to close {}", theCloseable, tx);
052                        }
053                }
054        }
055
056        /**
057         * Cast the object to the target class, returning an empty optional if it fails.
058         */
059        public static <T> Optional<T> safeCast(Object theObject, Class<T> theTargetClass) {
060                if (theTargetClass.isInstance(theObject)) {
061                        return Optional.of(theTargetClass.cast(theObject));
062                }
063                return Optional.empty();
064        }
065}