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Java > Open Source Codes > org > eclipse > jdt > internal > compiler > codegen > VerificationTypeInfo


1 /*******************************************************************************
2  * Copyright (c) 2000, 2006 IBM Corporation and others.
3  * All rights reserved. This program and the accompanying materials
4  * are made available under the terms of the Eclipse Public License v1.0
5  * which accompanies this distribution, and is available at
6  * http://www.eclipse.org/legal/epl-v10.html
7  *
8  * Contributors:
9  * IBM Corporation - initial API and implementation
10  *******************************************************************************/
11 package org.eclipse.jdt.internal.compiler.codegen;
12
13 import org.eclipse.jdt.core.compiler.CharOperation;
14 import org.eclipse.jdt.internal.compiler.lookup.TypeBinding;
15 import org.eclipse.jdt.internal.compiler.lookup.TypeIds;
16
17 public class VerificationTypeInfo implements Cloneable JavaDoc {
18     /**
19      * The tag value representing top variable info
20      * @since 3.2
21      */
22     public static final int ITEM_TOP = 0;
23     /**
24      * The tag value representing integer variable info
25      * @since 3.2
26      */
27     public static final int ITEM_INTEGER = 1;
28     /**
29      * The tag value representing float variable info
30      * @since 3.2
31      */
32     public static final int ITEM_FLOAT = 2;
33     /**
34      * The tag value representing double variable info
35      * @since 3.2
36      */
37     public static final int ITEM_DOUBLE = 3;
38     /**
39      * The tag value representing long variable info
40      * @since 3.2
41      */
42     public static final int ITEM_LONG = 4;
43     /**
44      * The tag value representing null variable info
45      * @since 3.2
46      */
47     public static final int ITEM_NULL = 5;
48     /**
49      * The tag value representing uninitialized this variable info
50      * @since 3.2
51      */
52     public static final int ITEM_UNINITIALIZED_THIS = 6;
53     /**
54      * The tag value representing object variable info
55      * @since 3.2
56      */
57     public static final int ITEM_OBJECT = 7;
58     /**
59      * The tag value representing uninitialized variable info
60      * @since 3.2
61      */
62     public static final int ITEM_UNINITIALIZED = 8;
63     
64     public int tag;
65     private int id;
66     private char[] constantPoolName;
67     public int offset;
68
69 public VerificationTypeInfo(int id, char[] constantPoolName) {
70     this(id, VerificationTypeInfo.ITEM_OBJECT, constantPoolName);
71 }
72 public VerificationTypeInfo(int id, int tag, char[] constantPoolName) {
73     this.id = id;
74     this.constantPoolName = constantPoolName;
75     this.tag = tag;
76 }
77 public VerificationTypeInfo(int tag, TypeBinding binding) {
78     this(binding);
79     this.tag = tag;
80 }
81 public VerificationTypeInfo(TypeBinding binding) {
82     this.id = binding.id;
83     switch(binding.id) {
84         case TypeIds.T_boolean :
85         case TypeIds.T_byte :
86         case TypeIds.T_char :
87         case TypeIds.T_int :
88         case TypeIds.T_short :
89             this.tag = VerificationTypeInfo.ITEM_INTEGER;
90             break;
91         case TypeIds.T_float :
92             this.tag = VerificationTypeInfo.ITEM_FLOAT;
93             break;
94         case TypeIds.T_long :
95             this.tag = VerificationTypeInfo.ITEM_LONG;
96             break;
97         case TypeIds.T_double :
98             this.tag = VerificationTypeInfo.ITEM_DOUBLE;
99             break;
100         case TypeIds.T_null :
101             this.tag = VerificationTypeInfo.ITEM_NULL;
102             break;
103         default:
104             this.tag = VerificationTypeInfo.ITEM_OBJECT;
105     }
106     this.constantPoolName = binding.constantPoolName();
107 }
108 public void setBinding(TypeBinding binding) {
109     this.constantPoolName = binding.constantPoolName();
110     final int typeBindingId = binding.id;
111     this.id = typeBindingId;
112     switch(typeBindingId) {
113         case TypeIds.T_boolean :
114         case TypeIds.T_byte :
115         case TypeIds.T_char :
116         case TypeIds.T_int :
117         case TypeIds.T_short :
118             this.tag = VerificationTypeInfo.ITEM_INTEGER;
119             break;
120         case TypeIds.T_float :
121             this.tag = VerificationTypeInfo.ITEM_FLOAT;
122             break;
123         case TypeIds.T_long :
124             this.tag = VerificationTypeInfo.ITEM_LONG;
125             break;
126         case TypeIds.T_double :
127             this.tag = VerificationTypeInfo.ITEM_DOUBLE;
128             break;
129         case TypeIds.T_null :
130             this.tag = VerificationTypeInfo.ITEM_NULL;
131             break;
132         default:
133             this.tag = VerificationTypeInfo.ITEM_OBJECT;
134     }
135 }
136 public int id() {
137     return this.id;
138 }
139 public String JavaDoc toString() {
140     StringBuffer JavaDoc buffer = new StringBuffer JavaDoc();
141     switch(this.tag) {
142         case VerificationTypeInfo.ITEM_UNINITIALIZED_THIS :
143             buffer.append("uninitialized_this(").append(this.readableName()).append(")"); //$NON-NLS-1$//$NON-NLS-2$
144 break;
145         case VerificationTypeInfo.ITEM_UNINITIALIZED :
146             buffer.append("uninitialized(").append(this.readableName()).append(")"); //$NON-NLS-1$//$NON-NLS-2$
147 break;
148         default:
149             buffer.append(this.readableName());
150     }
151     return String.valueOf(buffer);
152 }
153 protected Object JavaDoc clone() throws CloneNotSupportedException JavaDoc {
154     final VerificationTypeInfo verificationTypeInfo = (VerificationTypeInfo) super.clone();
155     verificationTypeInfo.id = this.id;
156     verificationTypeInfo.tag = this.tag;
157     verificationTypeInfo.constantPoolName = this.constantPoolName;
158     verificationTypeInfo.offset = this.offset;
159     return verificationTypeInfo;
160 }
161 public boolean equals(Object JavaDoc obj) {
162     if (obj instanceof VerificationTypeInfo) {
163         VerificationTypeInfo info1 = (VerificationTypeInfo) obj;
164         return info1.tag == this.tag && CharOperation.equals(info1.constantPoolName(), this.constantPoolName());
165     }
166     return false;
167 }
168 public char[] constantPoolName() {
169     return this.constantPoolName;
170 }
171 public char[] readableName() {
172     return this.constantPoolName;
173 }
174 public void replaceWithElementType() {
175     if (this.constantPoolName[1] == 'L') {
176         this.constantPoolName = CharOperation.subarray(this.constantPoolName, 2, this.constantPoolName.length - 1);
177     } else {
178         this.constantPoolName = CharOperation.subarray(this.constantPoolName, 1, this.constantPoolName.length);
179         if (this.constantPoolName.length == 1) {
180             switch(this.constantPoolName[0]) {
181                 case 'I' :
182                     this.id = TypeIds.T_int;
183                     break;
184                 case 'B' :
185                     this.id = TypeIds.T_byte;
186                     break;
187                 case 'S' :
188                     this.id = TypeIds.T_short;
189                     break;
190                 case 'C' :
191                     this.id = TypeIds.T_char;
192                     break;
193                 case 'J' :
194                     this.id = TypeIds.T_long;
195                     break;
196                 case 'F' :
197                     this.id = TypeIds.T_float;
198                     break;
199                 case 'D' :
200                     this.id = TypeIds.T_double;
201                     break;
202                 case 'Z' :
203                     this.id = TypeIds.T_boolean;
204                     break;
205                 case 'N' :
206                     this.id = TypeIds.T_null;
207                     break;
208                 case 'V' :
209                     this.id = TypeIds.T_void;
210                     break;
211             }
212         }
213     }
214 }
215 }
216
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