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annotate graal/com.oracle.truffle.object/src/com/oracle/truffle/object/LocationImpl.java @ 18408:2c3666f44855

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Truffle: initial commit of object API implementation
author Andreas Woess <andreas.woess@jku.at>
date Tue, 18 Nov 2014 23:19:43 +0100
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children e9cbe1618733
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18408
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1 /*
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2 * Copyright (c) 2013, 2014, 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.truffle.object;
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24
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25 import com.oracle.truffle.api.object.*;
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26
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27 public abstract class LocationImpl extends Location {
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28 @Override
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29 public void set(DynamicObject store, Object value, Shape shape) throws IncompatibleLocationException, FinalLocationException {
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30 setInternal(store, value);
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31 }
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32
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33 @Override
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34 protected final Object getInternal(DynamicObject store) {
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35 throw new UnsupportedOperationException();
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36 }
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37
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38 @Override
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39 protected abstract void setInternal(DynamicObject store, Object value) throws IncompatibleLocationException;
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40
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41 @Override
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42 public final boolean canSet(DynamicObject store, Object value) {
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43 return canStore(value) && canStoreFinal(store, value);
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44 }
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45
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46 @Override
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47 public boolean canStore(Object value) {
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48 return true;
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49 }
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50
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51 @SuppressWarnings("unused")
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52 protected boolean canStoreFinal(DynamicObject store, Object value) {
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53 return true;
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54 }
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55
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56 public interface EffectivelyFinalLocation<T extends Location> {
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57 T toNonFinalLocation();
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58 }
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59
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60 public interface TypedObjectLocation<T extends Location & ObjectLocation> extends ObjectLocation {
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61 T toUntypedLocation();
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62 }
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63
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64 public interface InternalLongLocation extends LongLocation {
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65 void setLongInternal(DynamicObject store, long value);
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66 }
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67
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68 @Override
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69 public boolean isFinal() {
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70 return false;
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71 }
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72
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73 @Override
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74 public boolean isConstant() {
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75 return false;
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76 }
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77
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78 @Override
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79 public int hashCode() {
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80 final int prime = 31;
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81 int result = 1;
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82 result = prime * result + (isFinal() ? 1231 : 1237);
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83 return result;
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84 }
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85
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86 @Override
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87 public boolean equals(Object obj) {
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88 if (this == obj) {
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89 return true;
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90 }
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91 if (obj == null) {
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92 return false;
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93 }
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94 if (getClass() != obj.getClass()) {
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95 return false;
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96 }
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97 Location other = (Location) obj;
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98 if (isFinal() != other.isFinal()) {
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99 return false;
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100 }
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101 return true;
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102 }
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103
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104 @Override
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105 public String toString() {
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106 String finalString = isFinal() ? "f" : "";
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107 String typeString = this instanceof IntLocation ? "i" : (this instanceof DoubleLocation ? "d" : (this instanceof BooleanLocation ? "b"
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108 : (this instanceof TypedLocation ? ((TypedLocation) this).getType().getSimpleName() : "o")));
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109 return finalString + typeString + getWhereString();
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110 }
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111
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112 protected String getWhereString() {
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113 return "";
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114 }
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115
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116 /**
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117 * Get the number of object array elements this location requires.
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118 */
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119 public int objectArrayCount() {
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120 return 0;
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121 }
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122
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123 /**
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124 * Get the number of in-object {@link Object} fields this location requires.
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125 */
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126 public int objectFieldCount() {
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127 return 0;
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128 }
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129
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130 /**
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131 * Get the number of in-object primitive fields this location requires.
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132 */
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133 public int primitiveFieldCount() {
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134 return 0;
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135 }
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136
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137 /**
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138 * Get the number of primitive array elements this location requires.
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139 */
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140 public int primitiveArrayCount() {
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141 return 0;
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142 }
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143
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144 /**
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145 * Boxed values need to be compared by value not by reference.
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146 *
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147 * The first parameter should be the one with the more precise type information.
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148 *
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149 * For sets to final locations, otherValue.equals(thisValue) seems more beneficial, since we
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150 * usually know more about the value to be set.
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151 */
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152 public static boolean valueEquals(Object val1, Object val2) {
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153 return val1 == val2 || (val1 != null && val1.equals(val2));
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154 }
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155 }