
001package ca.uhn.fhir.util; 002 003/*- 004 * #%L 005 * HAPI FHIR - Core Library 006 * %% 007 * Copyright (C) 2014 - 2023 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 java.text.DecimalFormat; 024 025public class FileUtil { 026 // Use "bytes" instead of just "b" because it reads easier in logs 027 private static final String[] UNITS = new String[]{"Bytes", "kB", "MB", "GB", "TB"}; 028 029 public static String formatFileSize(long theBytes) { 030 if (theBytes <= 0) { 031 return "0 " + UNITS[0]; 032 } 033 int digitGroups = (int) (Math.log10(theBytes) / Math.log10(1024)); 034 digitGroups = Math.min(digitGroups, UNITS.length - 1); 035 return new DecimalFormat("###0.#").format(theBytes / Math.pow(1024, digitGroups)) + " " + UNITS[digitGroups]; 036 } 037 038}