Mercurial > hg > graal-jvmci-8

comparison jvmci/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotObjectConstant.java @ 22672:1bbd4a7c274b

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Rename jdk.internal.jvmci to jdk.vm.ci
author Tom Rodriguez <tom.rodriguez@oracle.com>
date Thu, 08 Oct 2015 17:28:41 -0700
parents jvmci/jdk.internal.jvmci.hotspot/src/jdk/internal/jvmci/hotspot/HotSpotObjectConstant.java@ec96f33a101d
children
comparison
equal deleted inserted replaced
22671:97f30e4d0e95 22672:1bbd4a7c274b
1 /*
2 * Copyright (c) 2009, 2015, 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 package jdk.vm.ci.hotspot;
24
25 import java.lang.invoke.CallSite;
26 import java.util.Objects;
27
28 import jdk.vm.ci.meta.Assumptions;
29 import jdk.vm.ci.meta.JavaConstant;
30 import jdk.vm.ci.meta.ResolvedJavaType;
31 import jdk.vm.ci.meta.VMConstant;
32
33 /**
34 * Represents a constant non-{@code null} object reference, within the compiler and across the
35 * compiler/runtime interface.
36 */
37 public interface HotSpotObjectConstant extends JavaConstant, HotSpotConstant, VMConstant {
38
39 JavaConstant compress();
40
41 JavaConstant uncompress();
42
43 /**
44 * Gets the resolved Java type of the object represented by this constant.
45 */
46 HotSpotResolvedObjectType getType();
47
48 /**
49 * Gets the result of {@link Class#getClassLoader()} for the {@link Class} object represented by
50 * this constant.
51 *
52 * @return {@code null} if this constant does not represent a {@link Class} object
53 */
54 JavaConstant getClassLoader();
55
56 /**
57 * Gets the {@linkplain System#identityHashCode(Object) identity} has code for the object
58 * represented by this constant.
59 */
60 int getIdentityHashCode();
61
62 /**
63 * Gets the result of {@link Class#getComponentType()} for the {@link Class} object represented
64 * by this constant.
65 *
66 * @return {@code null} if this constant does not represent a {@link Class} object
67 */
68 JavaConstant getComponentType();
69
70 /**
71 * Gets the result of {@link Class#getSuperclass()} for the {@link Class} object represented by
72 * this constant.
73 *
74 * @return {@code null} if this constant does not represent a {@link Class} object
75 */
76 JavaConstant getSuperclass();
77
78 /**
79 * Gets the result of {@link CallSite#getTarget()} for the {@link CallSite} object represented
80 * by this constant.
81 *
82 * @param assumptions used to register an assumption that the {@link CallSite}'s target does not
83 * change
84 * @return {@code null} if this constant does not represent a {@link CallSite} object
85 */
86 JavaConstant getCallSiteTarget(Assumptions assumptions);
87
88 /**
89 * Determines if this constant represents an {@linkplain String#intern() interned} string.
90 */
91 boolean isInternedString();
92
93 /**
94 * Gets the object represented by this constant represents if it is of a given type.
95 *
96 * @param type the expected type of the object represented by this constant. If the object is
97 * required to be of this type, then wrap the call to this method in
98 * {@link Objects#requireNonNull(Object)}.
99 * @return the object value represented by this constant if it is an
100 * {@link ResolvedJavaType#isInstance(JavaConstant) instance of} {@code type} otherwise
101 * {@code null}
102 */
103 <T> T asObject(Class<T> type);
104
105 /**
106 * Gets the object represented by this constant represents if it is of a given type.
107 *
108 * @param type the expected type of the object represented by this constant. If the object is
109 * required to be of this type, then wrap the call to this method in
110 * {@link Objects#requireNonNull(Object)}.
111 * @return the object value represented by this constant if it is an
112 * {@link ResolvedJavaType#isInstance(JavaConstant) instance of} {@code type} otherwise
113 * {@code null}
114 */
115 Object asObject(ResolvedJavaType type);
116 }