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/*
 * 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;

/**
 * Filters files based on size, can filter either smaller files or
 * files equal to or larger than a given threshold.
 * 

* For example, to print all files and directories in the * current directory whose size is greater than 1 MB: * *

 * File dir = new File(".");
 * String[] files = dir.list( new SizeFileFilter(1024 * 1024) );
 * for ( int i = 0; i < files.length; i++ ) {
 *     System.out.println(files[i]);
 * }
 * 
* * @author Rahul Akolkar * @version $Id: SizeFileFilter.java 463570 2006-10-13 06:14:41Z niallp $ * @since Commons IO 1.2 */ public class SizeFileFilter extends AbstractFileFilter { /** The size threshold. */ private long size; /** Whether the files accepted will be larger or smaller. */ private boolean acceptLarger; /** * Constructs a new size file filter for files equal to or * larger than a certain size. * * @param size the threshold size of the files * @throws IllegalArgumentException if the size is negative */ public SizeFileFilter(long size) { this(size, true); } /** * Constructs a new size file filter for files based on a certain size * threshold. * * @param size the threshold size of the files * @param acceptLarger if true, files equal to or larger are accepted, * otherwise smaller ones (but not equal to) * @throws IllegalArgumentException if the size is negative */ public SizeFileFilter(long size, boolean acceptLarger) { if (size < 0) { throw new IllegalArgumentException("The size must be non-negative"); } this.size = size; this.acceptLarger = acceptLarger; } //----------------------------------------------------------------------- /** * Checks to see if the size of the file is favorable. *

* If size equals threshold and smaller files are required, * file IS NOT selected. * If size equals threshold and larger files are required, * file IS selected. * * @param file the File to check * @return true if the filename matches */ public boolean accept(File file) { boolean smaller = file.length() < size; return acceptLarger ? !smaller : smaller; } }





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