1 /* 2 * Copyright (C) 2013 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.providers.downloads; 18 19 import java.io.InputStream; 20 import java.util.Arrays; 21 22 /** 23 * Provides fake data for large transfers. 24 */ 25 public class FakeInputStream extends InputStream { 26 private long mRemaining; 27 28 public FakeInputStream(long length) { 29 mRemaining = length; 30 } 31 32 @Override 33 public int read() { 34 final int value; 35 if (mRemaining > 0) { 36 mRemaining--; 37 return 0; 38 } else { 39 return -1; 40 } 41 } 42 43 @Override 44 public int read(byte[] buffer, int offset, int length) { 45 Arrays.checkOffsetAndCount(buffer.length, offset, length); 46 47 if (length > mRemaining) { 48 length = (int) mRemaining; 49 } 50 mRemaining -= length; 51 52 if (length == 0) { 53 return -1; 54 } else { 55 return length; 56 } 57 } 58 } 59
