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1 /*
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2 * Copyright 2003-2007 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.utilities.soql;
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26
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27 import sun.jvm.hotspot.oops.*;
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28
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29 /** This is JavaScript wrapper for Java Instance in debuggee.*/
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30
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31 public class JSJavaInstance extends JSJavaObject {
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32 public JSJavaInstance(Instance instance, JSJavaFactory fac) {
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33 super(instance, fac);
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34 this.type = (JSJavaInstanceKlass) fac.newJSJavaKlass(instance.getKlass());
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35 }
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36
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37 public final Instance getInstance() {
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38 return (Instance) getOop();
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39 }
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40
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41 public final JSJavaClass getJSJavaClass() {
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42 return type.getJSJavaClass();
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43 }
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44
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45 public Object get(String name) {
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46 if (hasField(name)) {
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47 return getFieldValue(name);
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48 } else {
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49 return super.get(name);
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50 }
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51 }
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52
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53 public Object[] getIds() {
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54 String[] fieldNames = getFieldNames();
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55 Object[] superFields = super.getIds();
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56 Object[] res = new Object[fieldNames.length + superFields.length];
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57 System.arraycopy(fieldNames, 0, res, 0, fieldNames.length);
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58 System.arraycopy(superFields, 0, res, fieldNames.length, superFields.length);
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59 return res;
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60 }
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61
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62 public boolean has(String name) {
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63 if (hasField(name)) {
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64 return true;
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65 } else {
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66 return super.has(name);
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67 }
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68 }
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69
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70 public void put(String name, Object value) {
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71 if (! hasField(name)) {
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72 super.put(name, value);
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73 }
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74 }
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75
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76 protected Object getFieldValue(String name) {
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77 try {
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78 return type.getInstanceFieldValue(name, getInstance());
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79 } catch (NoSuchFieldException exp) {
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80 return UNDEFINED;
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81 }
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82 }
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83
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84 protected String[] getFieldNames() {
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85 return type.getInstanceFieldNames();
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86 }
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87
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88 protected boolean hasField(String name) {
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89 return type.hasInstanceField(name);
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90 }
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91
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92 protected final JSJavaInstanceKlass type;
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93 }
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