| /* |
| * 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.vfs2; |
| |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| /** |
| * A {@link FileSelector} that selects based on file extensions. |
| * <p> |
| * The extension comparison is case insensitive. |
| * </p> |
| * <p> |
| * The selector makes a copy of a given Collection or array. Changing the object passed in the constructors will not |
| * affect the selector. |
| * </p> |
| * |
| * @since 2.1 |
| */ |
| public class FileExtensionSelector implements FileSelector { |
| |
| /** |
| * The extensions to select. |
| */ |
| private final Set<String> extensions = new HashSet<>(); |
| |
| /** |
| * Creates a new selector for the given extensions. |
| * |
| * @param extensions The extensions to be included by this selector. |
| */ |
| public FileExtensionSelector(final Collection<String> extensions) { |
| if (extensions != null) { |
| this.extensions.addAll(extensions); |
| } |
| } |
| |
| /** |
| * Creates a new selector for the given extensions. |
| * |
| * @param extensions The extensions to be included by this selector. |
| */ |
| public FileExtensionSelector(final String... extensions) { |
| if (extensions != null) { |
| this.extensions.addAll(Arrays.asList(extensions)); |
| } |
| } |
| |
| /** |
| * Determines if a file or folder should be selected. |
| * |
| * @param fileInfo The file selection information. |
| * @return true if the file should be selected, false otherwise. |
| */ |
| @Override |
| public boolean includeFile(final FileSelectInfo fileInfo) throws Exception { |
| if (this.extensions == null) { |
| return false; |
| } |
| for (final String extension : this.extensions) { |
| if (fileInfo.getFile().getName().getExtension().equalsIgnoreCase(extension)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Determines whether a folder should be traversed. |
| * |
| * @param fileInfo The file selection information. |
| * @return true if descendants should be traversed, fase otherwise. |
| */ |
| @Override |
| public boolean traverseDescendents(final FileSelectInfo fileInfo) throws Exception { |
| return true; |
| } |
| } |