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1 /*
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2 * Copyright 2001 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.debugger.cdbg.basic;
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26
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27 import sun.jvm.hotspot.debugger.*;
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28 import sun.jvm.hotspot.debugger.cdbg.*;
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29 import sun.jvm.hotspot.utilities.Assert;
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30
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31 public class LazyType extends BasicType {
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32 private Object key;
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33 private int cvAttributes;
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34
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35 public LazyType(Object key) {
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36 this(key, 0);
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37 }
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38
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39 private LazyType(Object key, int cvAttributes) {
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40 super(null, 0, cvAttributes);
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41 if (Assert.ASSERTS_ENABLED) {
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42 Assert.that(key != null, "key must not be null");
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43 }
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44 this.key = key;
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45 this.cvAttributes = cvAttributes;
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46 }
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47
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48 public boolean isLazy() { return true; }
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49 public Object getKey() { return key; }
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50
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51 Type resolveTypes(BasicCDebugInfoDataBase db, ResolveListener listener) {
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52 BasicType t = (BasicType) db.resolveType(this, this, listener, "resolving lazy type");
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53 // Returned type might be lazy if there was an error
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54 if (t.isLazy()) {
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55 return this;
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56 }
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57 if (cvAttributes != 0) {
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58 return t.getCVVariant(cvAttributes);
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59 }
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60 return t;
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61 }
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62
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63 public void iterateObject(Address a, ObjectVisitor v, FieldIdentifier f) {}
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64 protected Type createCVVariant(int cvAttributes) {
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65 return new LazyType(key, cvAttributes);
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66 }
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67
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68 public void visit(TypeVisitor v) {}
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69 }
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