UninitializedType.java revision 2571:10fc81ac75b4 
1/*
2 * Copyright (c) 2003, 2012, 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.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package com.sun.tools.javac.jvm;
27
28import com.sun.tools.javac.code.*;
29import com.sun.tools.javac.util.List;
30
31import static com.sun.tools.javac.code.TypeTag.UNINITIALIZED_OBJECT;
32import static com.sun.tools.javac.code.TypeTag.UNINITIALIZED_THIS;
33
34/** These pseudo-types appear in the generated verifier tables to
35 *  indicate objects that have been allocated but not yet constructed.
36 *
37 *  <p><b>This is NOT part of any supported API.
38 *  If you write code that depends on this, you do so at your own risk.
39 *  This code and its internal interfaces are subject to change or
40 *  deletion without notice.</b>
41 */
42class UninitializedType extends Type.DelegatedType {
43
44    public static UninitializedType uninitializedThis(Type qtype) {
45        return new UninitializedType(UNINITIALIZED_THIS, qtype, -1,
46                                     qtype.getAnnotationMirrors());
47    }
48
49    public static UninitializedType uninitializedObject(Type qtype, int offset) {
50        return new UninitializedType(UNINITIALIZED_OBJECT, qtype, offset,
51                                     qtype.getAnnotationMirrors());
52    }
53
54    public final int offset; // PC where allocation took place
55    private UninitializedType(TypeTag tag, Type qtype, int offset,
56                              List<Attribute.TypeCompound> typeAnnotations) {
57        super(tag, qtype, typeAnnotations);
58        this.offset = offset;
59    }
60
61    @Override
62    public UninitializedType annotatedType(List<Attribute.TypeCompound> typeAnnotations) {
63        return new UninitializedType(tag, qtype, offset, typeAnnotations);
64    }
65
66    Type initializedType() {
67        return qtype;
68    }
69}
70