MethodIdItem.java revision 119ddb08056d3ac73123f889bfd576766cdb6cc1
1/* 2 * [The "BSD licence"] 3 * Copyright (c) 2009 Ben Gruver 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 29package org.jf.dexlib; 30 31public class MethodIdItem extends IndexedItem<MethodIdItem> { 32 private final IndexedItemReference<TypeIdItem> classTypeReferenceField; 33 private final IndexedItemReference<ProtoIdItem> prototypeReferenceField; 34 private final IndexedItemReference<StringIdItem> methodNameReferenceField; 35 36 public MethodIdItem(DexFile dexFile, int index) { 37 super(index); 38 fields = new Field[] { 39 classTypeReferenceField = new IndexedItemReference<TypeIdItem>(dexFile.TypeIdsSection, 40 new ShortIntegerField(null), "class_idx"), 41 prototypeReferenceField = new IndexedItemReference<ProtoIdItem>(dexFile.ProtoIdsSection, 42 new ShortIntegerField(null), "proto_idx"), 43 methodNameReferenceField = new IndexedItemReference<StringIdItem>(dexFile.StringIdsSection, 44 new IntegerField(null), "name_idx") 45 }; 46 } 47 48 public MethodIdItem(DexFile dexFile, TypeIdItem classType, StringIdItem methodName, ProtoIdItem prototype) { 49 this(dexFile, -1); 50 classTypeReferenceField.setReference(classType); 51 prototypeReferenceField.setReference(prototype); 52 methodNameReferenceField.setReference(methodName); 53 } 54 55 protected int getAlignment() { 56 return 4; 57 } 58 59 public ItemType getItemType() { 60 return ItemType.TYPE_METHOD_ID_ITEM; 61 } 62 63 public String getConciseIdentity() { 64 return "method_id_item: " + getMethodString(); 65 } 66 67 private String cachedMethodString = null; 68 public String getMethodString() { 69 if (cachedMethodString == null) { 70 String parentClass = classTypeReferenceField.getReference().getTypeDescriptor(); 71 //strip the leading L and trailing ; 72 parentClass = parentClass.substring(1, parentClass.length() - 1); 73 74 cachedMethodString = parentClass + methodNameReferenceField.getReference().getStringValue() + 75 prototypeReferenceField.getReference().getPrototypeString(); 76 } 77 return cachedMethodString; 78 } 79 80 public ProtoIdItem getPrototype() { 81 return prototypeReferenceField.getReference(); 82 } 83 84 public String getMethodName() { 85 return methodNameReferenceField.getReference().getStringValue(); 86 } 87 88 public int getParameterRegisterCount(boolean isStatic) { 89 return prototypeReferenceField.getReference().getParameterRegisterCount() + (isStatic?0:1); 90 } 91 92 public TypeIdItem getContainingClass() { 93 return classTypeReferenceField.getReference(); 94 } 95 96 /** 97 * Return the number of parameters, not including the "this" parameter, if any 98 * @return The number of parameters, not including the "this" parameter, if any 99 */ 100 public int getParameterCount() { 101 return prototypeReferenceField.getReference().getParameterCount(); 102 } 103 104 public int compareTo(MethodIdItem o) { 105 int result = classTypeReferenceField.compareTo(o.classTypeReferenceField); 106 if (result != 0) { 107 return result; 108 } 109 110 result = methodNameReferenceField.compareTo(o.methodNameReferenceField); 111 if (result != 0) { 112 return result; 113 } 114 115 return prototypeReferenceField.compareTo(o.prototypeReferenceField); 116 } 117} 118