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1 /*
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2 * Copyright 2000-2002 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 package sun.jvm.hotspot.runtime;
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26
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27 import sun.jvm.hotspot.debugger.*;
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28 import sun.jvm.hotspot.types.*;
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29
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30 /** This is a base class for all VM runtime objects which wrap
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31 Addresses. The rationale is that without this in place, every
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32 class would have to implement equals() and hashCode() with
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33 boilerplate code, a practice which is inherently error-prone. */
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34
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35 public class VMObject {
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36 protected Address addr;
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37
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38 /** All of the objects have this as their constructor's signature
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39 anyway */
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40 public VMObject(Address addr) {
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41 this.addr = addr;
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42 }
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43
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44 public String toString() {
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45 return getClass().getName() + "@" + addr;
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46 }
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47
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48 public boolean equals(Object arg) {
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49 if (arg == null) {
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50 return false;
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51 }
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52
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53 if (!getClass().equals(arg.getClass())) {
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54 return false;
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55 }
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56
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57 VMObject obj = (VMObject) arg;
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58 if (!addr.equals(obj.addr)) {
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59 return false;
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60 }
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61
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62 return true;
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63 }
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64
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65 public int hashCode() {
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66 return addr.hashCode();
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67 }
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68
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69 public Address getAddress() {
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70 return addr;
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71 }
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72 }
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