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.sdklib.io; 18 19 import java.io.File; 20 import java.io.FileNotFoundException; 21 import java.io.FileOutputStream; 22 import java.io.IOException; 23 import java.io.OutputStream; 24 25 26 /** 27 * Wraps some common {@link File} operations on files and folders. 28 * <p/> 29 * This makes it possible to override/mock/stub some file operations in unit tests. 30 */ 31 public interface IFileOp { 32 33 /** 34 * Helper to delete a file or a directory. 35 * For a directory, recursively deletes all of its content. 36 * Files that cannot be deleted right away are marked for deletion on exit. 37 * The argument can be null. 38 */ deleteFileOrFolder(File fileOrFolder)39 public abstract void deleteFileOrFolder(File fileOrFolder); 40 41 /** 42 * Sets the executable Unix permission (+x) on a file or folder. 43 * <p/> 44 * This attempts to use File#setExecutable through reflection if 45 * it's available. 46 * If this is not available, this invokes a chmod exec instead, 47 * so there is no guarantee of it being fast. 48 * <p/> 49 * Caller must make sure to not invoke this under Windows. 50 * 51 * @param file The file to set permissions on. 52 * @throws IOException If an I/O error occurs 53 */ setExecutablePermission(File file)54 public abstract void setExecutablePermission(File file) throws IOException; 55 56 /** 57 * Copies a binary file. 58 * 59 * @param source the source file to copy. 60 * @param dest the destination file to write. 61 * @throws FileNotFoundException if the source file doesn't exist. 62 * @throws IOException if there's a problem reading or writing the file. 63 */ copyFile(File source, File dest)64 public abstract void copyFile(File source, File dest) throws IOException; 65 66 /** 67 * Checks whether 2 binary files are the same. 68 * 69 * @param source the source file to copy 70 * @param destination the destination file to write 71 * @throws FileNotFoundException if the source files don't exist. 72 * @throws IOException if there's a problem reading the files. 73 */ isSameFile(File source, File destination)74 public abstract boolean isSameFile(File source, File destination) 75 throws IOException; 76 77 /** Invokes {@link File#exists()} on the given {@code file}. */ exists(File file)78 public abstract boolean exists(File file); 79 80 /** Invokes {@link File#isFile()} on the given {@code file}. */ isFile(File file)81 public abstract boolean isFile(File file); 82 83 /** Invokes {@link File#isDirectory()} on the given {@code file}. */ isDirectory(File file)84 public abstract boolean isDirectory(File file); 85 86 /** Invokes {@link File#length()} on the given {@code file}. */ length(File file)87 public abstract long length(File file); 88 89 /** 90 * Invokes {@link File#delete()} on the given {@code file}. 91 * Note: for a recursive folder version, consider {@link #deleteFileOrFolder(File)}. 92 */ delete(File file)93 public abstract boolean delete(File file); 94 95 /** Invokes {@link File#mkdirs()} on the given {@code file}. */ mkdirs(File file)96 public abstract boolean mkdirs(File file); 97 98 /** Invokes {@link File#listFiles()} on the given {@code file}. */ listFiles(File file)99 public abstract File[] listFiles(File file); 100 101 /** Invokes {@link File#renameTo(File)} on the given files. */ renameTo(File oldDir, File newDir)102 public abstract boolean renameTo(File oldDir, File newDir); 103 104 /** Creates a new {@link FileOutputStream} for the given {@code file}. */ newFileOutputStream(File file)105 public abstract OutputStream newFileOutputStream(File file) throws FileNotFoundException; 106 107 } 108