1 /* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.ant; 18 19 import java.io.File; 20 import java.util.Set; 21 22 public class InputPath { 23 24 private final File mFile; 25 /** 26 * A set of extensions. Only files with an extension in this set will 27 * be considered for a modification check. All deleted/created files will still be 28 * checked. 29 */ 30 private final Set<String> mTouchedExtensions; 31 InputPath(File file)32 public InputPath(File file) { 33 this(file, null); 34 } 35 InputPath(File file, Set<String> extensionsToCheck)36 public InputPath(File file, Set<String> extensionsToCheck) { 37 mFile = file; 38 mTouchedExtensions = extensionsToCheck; 39 } 40 getFile()41 public File getFile() { 42 return mFile; 43 } 44 45 /** 46 * Returns whether this input path (likely actually a folder) must check this files for 47 * modification (all files are checked for add/delete). 48 * 49 * This is configured by constructing the {@link InputPath} with additional restriction 50 * parameters such as specific extensions. 51 * @param file the file to check 52 * @return true if the file must be checked for modification. 53 */ checksForModification(File file)54 public boolean checksForModification(File file) { 55 if (ignores(file)) { 56 return false; 57 } 58 59 if (mTouchedExtensions != null && 60 mTouchedExtensions.contains(getExtension(file)) == false) { 61 return false; 62 } 63 64 return true; 65 } 66 67 /** 68 * Returns whether the InputPath ignores a given file or folder. If it is ignored then 69 * the file (or folder) is not checked for any event (modification/add/delete). 70 * If it's a folder, then it and its content are completely ignored. 71 * @param file the file or folder to check 72 * @return true if the file or folder are ignored. 73 */ ignores(File file)74 public boolean ignores(File file) { 75 return false; 76 } 77 78 /** 79 * Gets the extension (if present) on a file by looking at the filename 80 * @param file the file to get the extension of 81 * @return the extension if present, or the empty string if the filename doesn't have 82 * and extension. 83 */ getExtension(File file)84 protected static String getExtension(File file) { 85 String filename = file.getName(); 86 int index = filename.lastIndexOf('.'); 87 if (index == -1) { 88 return ""; 89 } 90 // Don't include the leading '.' in the extension 91 return filename.substring(index + 1); 92 } 93 94 } 95