151 lines
5.2 KiB
Java
151 lines
5.2 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.commons.io.filefilter;
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import java.io.File;
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import java.io.Serializable;
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import java.util.Date;
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import org.apache.commons.io.FileUtils;
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/**
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* Filters files based on a cutoff time, can filter either newer
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* files or files equal to or older.
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* <p>
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* For example, to print all files and directories in the
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* current directory older than one day:
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*
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* <pre>
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* File dir = new File(".");
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* // We are interested in files older than one day
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* long cutoff = System.currentTimeMillis() - (24 * 60 * 60 * 1000);
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* String[] files = dir.list( new AgeFileFilter(cutoff) );
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* for ( int i = 0; i < files.length; i++ ) {
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* System.out.println(files[i]);
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* }
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* </pre>
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*
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* @author Rahul Akolkar
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* @version $Id: AgeFileFilter.java 606381 2007-12-22 02:03:16Z ggregory $
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* @since Commons IO 1.2
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*/
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public class AgeFileFilter extends AbstractFileFilter implements Serializable {
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/** The cutoff time threshold. */
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private final long cutoff;
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/** Whether the files accepted will be older or newer. */
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private final boolean acceptOlder;
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/**
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* Constructs a new age file filter for files equal to or older than
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* a certain cutoff
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*
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* @param cutoff the threshold age of the files
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*/
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public AgeFileFilter(long cutoff) {
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this(cutoff, true);
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}
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/**
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* Constructs a new age file filter for files on any one side
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* of a certain cutoff.
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*
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* @param cutoff the threshold age of the files
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* @param acceptOlder if true, older files (at or before the cutoff)
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* are accepted, else newer ones (after the cutoff).
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*/
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public AgeFileFilter(long cutoff, boolean acceptOlder) {
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this.acceptOlder = acceptOlder;
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this.cutoff = cutoff;
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}
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/**
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* Constructs a new age file filter for files older than (at or before)
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* a certain cutoff date.
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*
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* @param cutoffDate the threshold age of the files
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*/
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public AgeFileFilter(Date cutoffDate) {
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this(cutoffDate, true);
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}
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/**
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* Constructs a new age file filter for files on any one side
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* of a certain cutoff date.
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*
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* @param cutoffDate the threshold age of the files
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* @param acceptOlder if true, older files (at or before the cutoff)
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* are accepted, else newer ones (after the cutoff).
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*/
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public AgeFileFilter(Date cutoffDate, boolean acceptOlder) {
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this(cutoffDate.getTime(), acceptOlder);
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}
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/**
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* Constructs a new age file filter for files older than (at or before)
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* a certain File (whose last modification time will be used as reference).
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*
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* @param cutoffReference the file whose last modification
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* time is usesd as the threshold age of the files
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*/
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public AgeFileFilter(File cutoffReference) {
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this(cutoffReference, true);
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}
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/**
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* Constructs a new age file filter for files on any one side
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* of a certain File (whose last modification time will be used as
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* reference).
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*
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* @param cutoffReference the file whose last modification
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* time is usesd as the threshold age of the files
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* @param acceptOlder if true, older files (at or before the cutoff)
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* are accepted, else newer ones (after the cutoff).
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*/
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public AgeFileFilter(File cutoffReference, boolean acceptOlder) {
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this(cutoffReference.lastModified(), acceptOlder);
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}
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//-----------------------------------------------------------------------
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/**
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* Checks to see if the last modification of the file matches cutoff
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* favorably.
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* <p>
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* If last modification time equals cutoff and newer files are required,
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* file <b>IS NOT</b> selected.
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* If last modification time equals cutoff and older files are required,
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* file <b>IS</b> selected.
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*
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* @param file the File to check
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* @return true if the filename matches
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*/
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public boolean accept(File file) {
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boolean newer = FileUtils.isFileNewer(file, cutoff);
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return acceptOlder ? !newer : newer;
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}
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/**
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* Provide a String representaion of this file filter.
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*
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* @return a String representaion
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*/
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public String toString() {
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String condition = acceptOlder ? "<=" : ">";
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return super.toString() + "(" + condition + cutoff + ")";
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}
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}
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