1 /* 2 * [The "BSD licence"] 3 * Copyright (c) 2010 Ben Gruver (JesusFreke) 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 package org.jf.dexlib.EncodedValue; 30 31 import org.jf.dexlib.Util.AnnotatedOutput; 32 33 public class NullEncodedValue extends EncodedValue { 34 /** 35 * The singleton value 36 */ 37 public static final NullEncodedValue NullValue = new NullEncodedValue(); 38 39 /** 40 * Constructs a new <code>NullEncodedValue</code> 41 */ 42 private NullEncodedValue() { 43 } 44 45 /** {@inheritDoc} */ 46 public void writeValue(AnnotatedOutput out) { 47 if (out.annotates()) { 48 out.annotate("value_type=" + ValueType.VALUE_NULL.name() + ",value_arg=0"); 49 } 50 out.writeByte(ValueType.VALUE_NULL.value); 51 } 52 53 /** {@inheritDoc} */ 54 public int placeValue(int offset) { 55 return offset + 1; 56 } 57 58 /** {@inheritDoc} */ 59 protected int compareValue(EncodedValue o) { 60 return 0; 61 } 62 63 /** {@inheritDoc} */ 64 public ValueType getValueType() { 65 return ValueType.VALUE_NULL; 66 } 67 68 @Override 69 public int hashCode() { 70 return 1; 71 } 72 } 73