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1 /*
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2 * Copyright 2004-2007 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 java.util.*;
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28 import sun.jvm.hotspot.oops.*;
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29 import sun.jvm.hotspot.utilities.*;
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30
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31 /**
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32 This is JavaScript wrapper for Klass.
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33 */
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34 public abstract class JSJavaKlass {
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35 private static final int FIELD_SUPER_CLASS = 0;
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36 private static final int FIELD_NAME = 1;
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37 private static final int FIELD_IS_ARRAY_CLASS = 2;
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38 private static final int FIELD_UNDEFINED = -1;
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39
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40 public JSJavaKlass(Klass klass, JSJavaFactory factory) {
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41 this.factory = factory;
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42 this.klass = klass;
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43 }
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44
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45 public final Klass getKlass() {
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46 return klass;
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47 }
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48
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49 public JSJavaClass getJSJavaClass() {
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50 return (JSJavaClass) factory.newJSJavaObject(getKlass().getJavaMirror());
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51 }
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52
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53 public Object getMetaClassFieldValue(String name) {
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54 int fieldID = getFieldID(name);
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55 switch (fieldID) {
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56 case FIELD_SUPER_CLASS: {
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57 JSJavaKlass jk = factory.newJSJavaKlass(getKlass().getSuper());
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58 return (jk != null) ? jk.getJSJavaClass() : null;
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59 }
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60 case FIELD_NAME:
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61 return getName();
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62 case FIELD_IS_ARRAY_CLASS:
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63 return Boolean.valueOf(isArray());
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64 case FIELD_UNDEFINED:
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65 default:
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66 return ScriptObject.UNDEFINED;
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67 }
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68 }
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69
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70 public boolean hasMetaClassField(String name) {
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71 return getFieldID(name) != FIELD_UNDEFINED;
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72 }
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73
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74
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75 public String[] getMetaClassFieldNames() {
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76 String[] res = { "name", "superClass", "isArrayClass" };
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77 return res;
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78 }
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79
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80 public abstract String getName();
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81 public abstract boolean isArray();
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82
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83 //-- Internals only below this point
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84 private static Map fields = new HashMap();
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85 private static void addField(String name, int fieldId) {
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86 fields.put(name, new Integer(fieldId));
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87 }
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88
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89 private static int getFieldID(String name) {
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90 Integer res = (Integer) fields.get(name);
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91 return (res != null)? res.intValue() : FIELD_UNDEFINED;
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92 }
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93
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94 static {
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95 addField("base", FIELD_SUPER_CLASS);
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96 addField("baseClass", FIELD_SUPER_CLASS);
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97 addField("superClass", FIELD_SUPER_CLASS);
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98 addField("name", FIELD_NAME);
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99 addField("isArrayClass", FIELD_IS_ARRAY_CLASS);
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100 }
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101
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102 protected final JSJavaFactory factory;
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103 private final Klass klass;
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104 }
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