| /* |
| * Copyright (C) 2011 The Android Open Source Project |
| * |
| * Licensed 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.android.ant; |
| |
| import java.io.File; |
| import java.util.Set; |
| |
| public class InputPath { |
| |
| private final File mFile; |
| /** |
| * A set of extensions. Only files with an extension in this set will |
| * be considered for a modification check. All deleted/created files will still be |
| * checked. |
| */ |
| private final Set<String> mTouchedExtensions; |
| |
| public InputPath(File file) { |
| this(file, null); |
| } |
| |
| public InputPath(File file, Set<String> extensionsToCheck) { |
| if (file == null) { |
| throw new RuntimeException("File in InputPath(File) can't be null"); |
| } |
| mFile = file; |
| mTouchedExtensions = extensionsToCheck; |
| } |
| |
| public File getFile() { |
| return mFile; |
| } |
| |
| /** |
| * Returns whether this input path (likely actually a folder) must check this files for |
| * modification (all files are checked for add/delete). |
| * |
| * This is configured by constructing the {@link InputPath} with additional restriction |
| * parameters such as specific extensions. |
| * @param file the file to check |
| * @return true if the file must be checked for modification. |
| */ |
| public boolean checksForModification(File file) { |
| if (ignores(file)) { |
| return false; |
| } |
| |
| if (mTouchedExtensions != null && |
| mTouchedExtensions.contains(getExtension(file)) == false) { |
| return false; |
| } |
| |
| return true; |
| } |
| |
| /** |
| * Returns whether the InputPath ignores a given file or folder. If it is ignored then |
| * the file (or folder) is not checked for any event (modification/add/delete). |
| * If it's a folder, then it and its content are completely ignored. |
| * @param file the file or folder to check |
| * @return true if the file or folder are ignored. |
| */ |
| public boolean ignores(File file) { |
| // always ignore hidden files/folders. |
| return file.getName().startsWith("."); |
| } |
| |
| /** |
| * Gets the extension (if present) on a file by looking at the filename |
| * @param file the file to get the extension from |
| * @return the extension if present, or the empty string if the filename doesn't have |
| * and extension. |
| */ |
| protected static String getExtension(File file) { |
| return getExtension(file.getName()); |
| } |
| |
| /** |
| * Gets the extension (if present) on a file by looking at the filename |
| * @param fileName the filename to get the extension from |
| * @return the extension if present, or the empty string if the filename doesn't have |
| * and extension. |
| */ |
| protected static String getExtension(String fileName) { |
| int index = fileName.lastIndexOf('.'); |
| if (index == -1) { |
| return ""; |
| } |
| // Don't include the leading '.' in the extension |
| return fileName.substring(index + 1); |
| } |
| |
| } |