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Commons IO example source code file (AgeFileFilter.java)
The Commons IO AgeFileFilter.java source code/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You 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. */ package org.apache.commons.io.filefilter; import java.io.File; import java.io.Serializable; import java.util.Date; import org.apache.commons.io.FileUtils; /** * Filters files based on a cutoff time, can filter either newer * files or files equal to or older. * <p> * For example, to print all files and directories in the * current directory older than one day: * * <pre> * File dir = new File("."); * // We are interested in files older than one day * long cutoff = System.currentTimeMillis() - (24 * 60 * 60 * 1000); * String[] files = dir.list( new AgeFileFilter(cutoff) ); * for ( int i = 0; i < files.length; i++ ) { * System.out.println(files[i]); * } * </pre> * * @author Rahul Akolkar * @version $Id: AgeFileFilter.java 1005099 2010-10-06 16:13:01Z niallp $ * @see FileFilterUtils#ageFileFilter(Date) * @see FileFilterUtils#ageFileFilter(File) * @see FileFilterUtils#ageFileFilter(long) * @see FileFilterUtils#ageFileFilter(Date, boolean) * @see FileFilterUtils#ageFileFilter(File, boolean) * @see FileFilterUtils#ageFileFilter(long, boolean) * @since Commons IO 1.2 */ public class AgeFileFilter extends AbstractFileFilter implements Serializable { /** The cutoff time threshold. */ private final long cutoff; /** Whether the files accepted will be older or newer. */ private final boolean acceptOlder; /** * Constructs a new age file filter for files equal to or older than * a certain cutoff * * @param cutoff the threshold age of the files */ public AgeFileFilter(long cutoff) { this(cutoff, true); } /** * Constructs a new age file filter for files on any one side * of a certain cutoff. * * @param cutoff the threshold age of the files * @param acceptOlder if true, older files (at or before the cutoff) * are accepted, else newer ones (after the cutoff). */ public AgeFileFilter(long cutoff, boolean acceptOlder) { this.acceptOlder = acceptOlder; this.cutoff = cutoff; } /** * Constructs a new age file filter for files older than (at or before) * a certain cutoff date. * * @param cutoffDate the threshold age of the files */ public AgeFileFilter(Date cutoffDate) { this(cutoffDate, true); } /** * Constructs a new age file filter for files on any one side * of a certain cutoff date. * * @param cutoffDate the threshold age of the files * @param acceptOlder if true, older files (at or before the cutoff) * are accepted, else newer ones (after the cutoff). */ public AgeFileFilter(Date cutoffDate, boolean acceptOlder) { this(cutoffDate.getTime(), acceptOlder); } /** * Constructs a new age file filter for files older than (at or before) * a certain File (whose last modification time will be used as reference). * * @param cutoffReference the file whose last modification * time is usesd as the threshold age of the files */ public AgeFileFilter(File cutoffReference) { this(cutoffReference, true); } /** * Constructs a new age file filter for files on any one side * of a certain File (whose last modification time will be used as * reference). * * @param cutoffReference the file whose last modification * time is usesd as the threshold age of the files * @param acceptOlder if true, older files (at or before the cutoff) * are accepted, else newer ones (after the cutoff). */ public AgeFileFilter(File cutoffReference, boolean acceptOlder) { this(cutoffReference.lastModified(), acceptOlder); } //----------------------------------------------------------------------- /** * Checks to see if the last modification of the file matches cutoff * favorably. * <p> * If last modification time equals cutoff and newer files are required, * file <b>IS NOT selected. * If last modification time equals cutoff and older files are required, * file <b>IS selected. * * @param file the File to check * @return true if the filename matches */ @Override public boolean accept(File file) { boolean newer = FileUtils.isFileNewer(file, cutoff); return acceptOlder ? !newer : newer; } /** * Provide a String representaion of this file filter. * * @return a String representaion */ @Override public String toString() { String condition = acceptOlder ? "<=" : ">"; return super.toString() + "(" + condition + cutoff + ")"; } } Other Commons IO examples (source code examples)Here is a short list of links related to this Commons IO AgeFileFilter.java source code file: |
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