001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.commons.vfs2; 018 019import java.util.Objects; 020 021/** 022 * Inverts file inclusion of a delegate FileSelector, folder traversal is delegated. 023 * 024 * @since 2.2 025 */ 026public class InvertIncludeFileSelector implements FileSelector { 027 028 public InvertIncludeFileSelector(final FileSelector delegateFileSelector) { 029 this.delegateFileSelector = Objects.requireNonNull(delegateFileSelector, "delegateFileSelector"); 030 } 031 032 private final FileSelector delegateFileSelector; 033 034 /** 035 * Inverts the result of calling {@link #includeFile(FileSelectInfo)} on the delegate. 036 */ 037 @Override 038 public boolean includeFile(final FileSelectInfo fileInfo) throws Exception { 039 return !delegateFileSelector.includeFile(fileInfo); 040 } 041 042 /** 043 * Calls {@link #traverseDescendents(FileSelectInfo)} on the delegate. 044 */ 045 @Override 046 public boolean traverseDescendents(final FileSelectInfo fileInfo) throws Exception { 047 return delegateFileSelector.traverseDescendents(fileInfo); 048 } 049 050}