1 /* 2 * BCJEncoder 3 * 4 * Author: Lasse Collin <lasse.collin@tukaani.org> 5 * 6 * This file has been put into the public domain. 7 * You can do whatever you want with this file. 8 */ 9 10 package org.tukaani.xz; 11 12 class BCJEncoder extends BCJCoder implements FilterEncoder { 13 private final BCJOptions options; 14 private final long filterID; 15 private final byte[] props; 16 BCJEncoder(BCJOptions options, long filterID)17 BCJEncoder(BCJOptions options, long filterID) { 18 assert isBCJFilterID(filterID); 19 int startOffset = options.getStartOffset(); 20 21 if (startOffset == 0) { 22 props = new byte[0]; 23 } else { 24 props = new byte[4]; 25 for (int i = 0; i < 4; ++i) 26 props[i] = (byte)(startOffset >>> (i * 8)); 27 } 28 29 this.filterID = filterID; 30 this.options = (BCJOptions)options.clone(); 31 } 32 getFilterID()33 public long getFilterID() { 34 return filterID; 35 } 36 getFilterProps()37 public byte[] getFilterProps() { 38 return props; 39 } 40 supportsFlushing()41 public boolean supportsFlushing() { 42 return false; 43 } 44 getOutputStream(FinishableOutputStream out)45 public FinishableOutputStream getOutputStream(FinishableOutputStream out) { 46 return options.getOutputStream(out); 47 } 48 } 49