1 /*
2 * Copyright 2000 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 package sun.jvm.hotspot.types.basic;
26
27 import sun.jvm.hotspot.debugger.*;
28 import sun.jvm.hotspot.types.*;
29
30 /** A basic implementation of Field which should be suitable for
31 cross-platform use. */
32
33 public class BasicField implements Field {
34 protected BasicTypeDataBase db;
35 protected Type type;
36
37 private Type containingType;
38 private String name;
39 private long size;
40 private boolean isStatic;
41 /** Used for nonstatic fields only */
42 private long offset;
43 /** Used for static fields only */
44 private Address staticFieldAddress;
45
46 /** offsetInBytes is ignored if the field is static;
47 staticFieldAddress is used only if the field is static. */
48 public BasicField(BasicTypeDataBase db, Type containingType, String name, Type type,
49 boolean isStatic, long offsetInBytes, Address staticFieldAddress) {
50 this.db = db;
51 this.containingType = containingType;
52 this.name = name;
53 this.type = type;
54 this.size = type.getSize();
55 this.isStatic = isStatic;
56 this.offset = offsetInBytes;
57 this.staticFieldAddress = staticFieldAddress;
58 }
59
60 public String getName() {
61 return name;
62 }
63
64 public Type getType() {
65 return type;
66 }
67
68 public long getSize() {
69 return size;
70 }
71
72 public boolean isStatic() {
73 return isStatic;
74 }
75
76 public long getOffset() throws WrongTypeException {
77 if (isStatic) {
78 throw new WrongTypeException("field \"" + name + "\" in class " +
79 containingType.getName() + " is static");
80 }
81 return offset;
82 }
83
84 public Address getStaticFieldAddress() throws WrongTypeException {
85 if (!isStatic) {
86 throw new WrongTypeException("field \"" + name + "\" in class " +
87 containingType.getName() + " is not static");
88 }
89 return staticFieldAddress;
90 }
91
92 //--------------------------------------------------------------------------------
93 // Dereferencing operations for non-static fields
94 //
95
96 public boolean getJBoolean (Address addr) throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
97 if (isStatic) {
98 throw new WrongTypeException();
99 }
100 return addr.getJBooleanAt(offset);
101 }
102 public byte getJByte (Address addr) throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
103 if (isStatic) {
104 throw new WrongTypeException();
105 }
106 return addr.getJByteAt(offset);
107 }
108 public char getJChar (Address addr) throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
109 if (isStatic) {
110 throw new WrongTypeException();
111 }
112 return addr.getJCharAt(offset);
113 }
114 public double getJDouble (Address addr) throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
115 if (isStatic) {
116 throw new WrongTypeException();
117 }
118 return addr.getJDoubleAt(offset);
119 }
120 public float getJFloat (Address addr) throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
121 if (isStatic) {
122 throw new WrongTypeException();
123 }
124 return addr.getJFloatAt(offset);
125 }
126 public int getJInt (Address addr) throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
127 if (isStatic) {
128 throw new WrongTypeException();
129 }
130 return addr.getJIntAt(offset);
131 }
132 public long getJLong (Address addr) throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
133 if (isStatic) {
134 throw new WrongTypeException();
135 }
136 return addr.getJLongAt(offset);
137 }
138 public short getJShort (Address addr) throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
139 if (isStatic) {
140 throw new WrongTypeException();
141 }
142 return addr.getJShortAt(offset);
143 }
144 public long getCInteger (Address addr, CIntegerType type)
145 throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
146 if (isStatic) {
147 throw new WrongTypeException();
148 }
149 return addr.getCIntegerAt(offset, type.getSize(), type.isUnsigned());
150 }
151 public Address getAddress (Address addr) throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
152 if (isStatic) {
153 throw new WrongTypeException();
154 }
155 return addr.getAddressAt(offset);
156 }
157 public OopHandle getOopHandle(Address addr)
158 throws UnmappedAddressException, UnalignedAddressException, WrongTypeException, NotInHeapException {
159 if (isStatic) {
160 throw new WrongTypeException();
161 }
162 return addr.getOopHandleAt(offset);
163 }
164
165 //--------------------------------------------------------------------------------
166 // Dereferencing operations for static fields
167 //
168
169 public boolean getJBoolean () throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
170 if (!isStatic) {
171 throw new WrongTypeException();
172 }
173 return staticFieldAddress.getJBooleanAt(0);
174 }
175 public byte getJByte () throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
176 if (!isStatic) {
177 throw new WrongTypeException();
178 }
179 return staticFieldAddress.getJByteAt(0);
180 }
181 public char getJChar () throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
182 if (!isStatic) {
183 throw new WrongTypeException();
184 }
185 return staticFieldAddress.getJCharAt(0);
186 }
187 public double getJDouble () throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
188 if (!isStatic) {
189 throw new WrongTypeException();
190 }
191 return staticFieldAddress.getJDoubleAt(0);
192 }
193 public float getJFloat () throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
194 if (!isStatic) {
195 throw new WrongTypeException();
196 }
197 return staticFieldAddress.getJFloatAt(0);
198 }
199 public int getJInt () throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
200 if (!isStatic) {
201 throw new WrongTypeException();
202 }
203 return staticFieldAddress.getJIntAt(0);
204 }
205 public long getJLong () throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
206 if (!isStatic) {
207 throw new WrongTypeException();
208 }
209 return staticFieldAddress.getJLongAt(0);
210 }
211 public short getJShort () throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
212 if (!isStatic) {
213 throw new WrongTypeException();
214 }
215 return staticFieldAddress.getJShortAt(0);
216 }
217 public long getCInteger (CIntegerType type)
218 throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
219 if (!isStatic) {
220 throw new WrongTypeException();
221 }
222 return staticFieldAddress.getCIntegerAt(0, type.getSize(), type.isUnsigned());
223 }
224 public Address getAddress () throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
225 if (!isStatic) {
226 throw new WrongTypeException();
227 }
228 return staticFieldAddress.getAddressAt(0);
229 }
230 public OopHandle getOopHandle()
231 throws UnmappedAddressException, UnalignedAddressException, WrongTypeException, NotInHeapException {
232 if (!isStatic) {
233 throw new WrongTypeException();
234 }
235 return staticFieldAddress.getOopHandleAt(0);
236 }
237 }