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Commons IO example source code file (SizeFileFilter.java)
The Commons IO SizeFileFilter.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; /** * Filters files based on size, can filter either smaller files or * files equal to or larger than a given threshold. * <p> * For example, to print all files and directories in the * current directory whose size is greater than 1 MB: * * <pre> * 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]); * } * </pre> * * @author Rahul Akolkar * @version $Id: SizeFileFilter.java 1005099 2010-10-06 16:13:01Z niallp $ * @since Commons IO 1.2 * @see FileFilterUtils#sizeFileFilter(long) * @see FileFilterUtils#sizeFileFilter(long, boolean) * @see FileFilterUtils#sizeRangeFileFilter(long, long) */ public class SizeFileFilter extends AbstractFileFilter implements Serializable { /** The size threshold. */ private final long size; /** Whether the files accepted will be larger or smaller. */ private final 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. * <p> * If size equals threshold and smaller files are required, * file <b>IS NOT selected. * If size equals threshold and larger 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 smaller = file.length() < size; return acceptLarger ? !smaller : smaller; } /** * Provide a String representaion of this file filter. * * @return a String representaion */ @Override public String toString() { String condition = acceptLarger ? ">=" : "<"; return super.toString() + "(" + condition + size + ")"; } } Other Commons IO examples (source code examples)Here is a short list of links related to this Commons IO SizeFileFilter.java source code file: |
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