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annotate graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/jvmci/HotSpotObjectConstant.java @ 21542:543957c1c6a6

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removed more dependencies from JVMCI classes to non-JVMCI classes (JBS:GRAAL-53)
author Doug Simon <doug.simon@oracle.com>
date Mon, 25 May 2015 22:30:44 +0200
parents 1da7aef31a08
children
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1 /*
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2 * Copyright (c) 2009, 2015, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.graal.hotspot.jvmci;
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24
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25 import java.lang.invoke.*;
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26 import java.util.*;
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27
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28 import com.oracle.graal.api.meta.*;
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29
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30 /**
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31 * Represents a constant non-{@code null} object reference, within the compiler and across the
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32 * compiler/runtime interface.
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33 */
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34 public interface HotSpotObjectConstant extends JavaConstant, HotSpotConstant, VMConstant {
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35
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36 JavaConstant compress();
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37
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38 JavaConstant uncompress();
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39
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40 /**
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41 * Gets the resolved Java type of the object represented by this constant.
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42 */
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43 HotSpotResolvedObjectType getType();
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44
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45 /**
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46 * Gets the result of {@link Class#getClassLoader()} for the {@link Class} object represented by
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47 * this constant.
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48 *
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49 * @return {@code null} if this constant does not represent a {@link Class} object
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50 */
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51 JavaConstant getClassLoader();
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52
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53 /**
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54 * Gets the {@linkplain System#identityHashCode(Object) identity} has code for the object
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55 * represented by this constant.
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56 */
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57 int getIdentityHashCode();
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58
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59 /**
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60 * Gets the result of {@link Class#getComponentType()} for the {@link Class} object represented
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61 * by this constant.
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62 *
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63 * @return {@code null} if this constant does not represent a {@link Class} object
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64 */
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65 JavaConstant getComponentType();
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66
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67 /**
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68 * Gets the result of {@link Class#getSuperclass()} for the {@link Class} object represented by
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69 * this constant.
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70 *
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71 * @return {@code null} if this constant does not represent a {@link Class} object
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72 */
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73 JavaConstant getSuperclass();
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74
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75 /**
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76 * Gets the result of {@link CallSite#getTarget()} for the {@link CallSite} object represented
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77 * by this constant.
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78 *
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79 * @param assumptions used to register an assumption that the {@link CallSite}'s target does not
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80 * change
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81 * @return {@code null} if this constant does not represent a {@link CallSite} object
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82 */
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83 JavaConstant getCallSiteTarget(Assumptions assumptions);
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84
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85 /**
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86 * Determines if this constant represents an {@linkplain String#intern() interned} string.
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87 */
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88 boolean isInternedString();
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89
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90 /**
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91 * Gets the object represented by this constant represents if it is of a given type.
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92 *
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93 * @param type the expected type of the object represented by this constant. If the object is
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94 * required to be of this type, then wrap the call to this method in
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95 * {@link Objects#requireNonNull(Object)}.
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96 * @return the object value represented by this constant if it is an
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97 * {@link ResolvedJavaType#isInstance(JavaConstant) instance of} {@code type} otherwise
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98 * {@code null}
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99 */
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100 <T> T asObject(Class<T> type);
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101
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102 /**
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103 * Gets the object represented by this constant represents if it is of a given type.
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104 *
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105 * @param type the expected type of the object represented by this constant. If the object is
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106 * required to be of this type, then wrap the call to this method in
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107 * {@link Objects#requireNonNull(Object)}.
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108 * @return the object value represented by this constant if it is an
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109 * {@link ResolvedJavaType#isInstance(JavaConstant) instance of} {@code type} otherwise
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110 * {@code null}
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111 */
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112 Object asObject(ResolvedJavaType type);
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113 }