1/*
2 * Copyright (c) 2001, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25package sun.jvm.hotspot.debugger.cdbg.basic;
26
27import sun.jvm.hotspot.debugger.*;
28import sun.jvm.hotspot.debugger.cdbg.*;
29import sun.jvm.hotspot.utilities.Assert;
30
31public class LazyType extends BasicType {
32  private Object key;
33  private int    cvAttributes;
34
35  public LazyType(Object key) {
36    this(key, 0);
37  }
38
39  private LazyType(Object key, int cvAttributes) {
40    super(null, 0, cvAttributes);
41    if (Assert.ASSERTS_ENABLED) {
42      Assert.that(key != null, "key must not be null");
43    }
44    this.key = key;
45    this.cvAttributes = cvAttributes;
46  }
47
48  public boolean isLazy() { return true; }
49  public Object getKey()  { return key; }
50
51  Type resolveTypes(BasicCDebugInfoDataBase db, ResolveListener listener) {
52    BasicType t = (BasicType) db.resolveType(this, this, listener, "resolving lazy type");
53    // Returned type might be lazy if there was an error
54    if (t.isLazy()) {
55      return this;
56    }
57    if (cvAttributes != 0) {
58      return t.getCVVariant(cvAttributes);
59    }
60    return t;
61  }
62
63  public void iterateObject(Address a, ObjectVisitor v, FieldIdentifier f) {}
64  protected Type createCVVariant(int cvAttributes) {
65    return new LazyType(key, cvAttributes);
66  }
67
68  public void visit(TypeVisitor v) {}
69}
70