ca.uhn.fhir.util.FileUtil Maven / Gradle / Ivy
/*-
* #%L
* HAPI FHIR - Core Library
* %%
* Copyright (C) 2014 - 2024 Smile CDR, Inc.
* %%
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* #L%
*/
package ca.uhn.fhir.util;
import java.text.DecimalFormat;
public class FileUtil {
// Use "bytes" instead of just "b" because it reads easier in logs
private static final String[] UNITS = new String[] {"Bytes", "kB", "MB", "GB", "TB"};
public static String formatFileSize(long theBytes) {
if (theBytes <= 0) {
return "0 " + UNITS[0];
}
int digitGroups = (int) (Math.log10(theBytes) / Math.log10(1024));
digitGroups = Math.min(digitGroups, UNITS.length - 1);
return new DecimalFormat("###0.#").format(theBytes / Math.pow(1024, digitGroups)) + " " + UNITS[digitGroups];
}
}