com.signalfx.shaded.apache.commons.io.filefilter.FileFileFilter Maven / Gradle / Ivy
/*
* 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 com.signalfx.shaded.apache.commons.io.filefilter;
import java.io.File;
import java.io.Serializable;
import java.nio.file.FileVisitResult;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.attribute.BasicFileAttributes;
/**
* This filter accepts {@code File}s that are files (not directories).
*
* For example, here is how to print out a list of the real files
* within the current directory:
*
* Using Classic IO
*
* File dir = new File(".");
* String[] files = dir.list(FileFileFilter.INSTANCE);
* for (String file : files) {
* System.out.println(file);
* }
*
*
* Using NIO
*
* final Path dir = Paths.get("");
* final AccumulatorPathVisitor visitor = AccumulatorPathVisitor.withLongCounters(FileFileFilter.INSTANCE);
* //
* // Walk one dir
* Files.walkFileTree(dir, Collections.emptySet(), 1, visitor);
* System.out.println(visitor.getPathCounters());
* System.out.println(visitor.getFileList());
* //
* visitor.getPathCounters().reset();
* //
* // Walk dir tree
* Files.walkFileTree(dir, visitor);
* System.out.println(visitor.getPathCounters());
* System.out.println(visitor.getDirList());
* System.out.println(visitor.getFileList());
*
*
* @since 1.3
* @see FileFilterUtils#fileFileFilter()
*/
public class FileFileFilter extends AbstractFileFilter implements Serializable {
/**
* Singleton instance of file filter.
*
* @since 2.9.0
*/
public static final IOFileFilter INSTANCE = new FileFileFilter();
/**
* Singleton instance of file filter.
*
* @deprecated Use {@link #INSTANCE}.
*/
@Deprecated
public static final IOFileFilter FILE = INSTANCE;
private static final long serialVersionUID = 5345244090827540862L;
/**
* Restrictive constructor.
*/
protected FileFileFilter() {
}
/**
* Checks to see if the file is a file.
*
* @param file the File to check
* @return true if the file is a file
*/
@Override
public boolean accept(final File file) {
return file.isFile();
}
/**
* Checks to see if the file is a file.
* @param file the File to check
*
* @return true if the file is a file
* @since 2.9.0
*/
@Override
public FileVisitResult accept(final Path file, final BasicFileAttributes attributes) {
return toFileVisitResult(Files.isRegularFile(file), file);
}
}