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annotate graal/com.oracle.truffle.api.object/src/com/oracle/truffle/api/object/Property.java @ 19156:247419385312
[SPARC] do not create superfluous copies of variables.
author | Josef Eisl <josef.eisl@jku.at> |
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date | Thu, 05 Feb 2015 10:34:13 +0100 |
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1 /* |
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2 * Copyright (c) 2012, 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. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 package com.oracle.truffle.api.object; |
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26 |
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27 /** |
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28 * Property objects represent the mapping between low-level stores and high-level data. The simplest |
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29 * Property could be nothing more than a map of one index to one property's value, but abstracting |
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30 * the interface allows for getter/setter methods, type-checked properties, and other such |
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31 * specialized and language-specific behavior. ECMAScript[8.6.1] |
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32 */ |
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33 public abstract class Property { |
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34 protected Property() { |
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35 } |
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36 |
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37 public static Property create(Object key, Location location, int flags) { |
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38 return Layout.getFactory().createProperty(key, location, flags); |
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39 } |
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40 |
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41 /** |
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42 * Get property identifier. |
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43 */ |
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44 public abstract Object getKey(); |
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45 |
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46 /** |
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47 * Get property flags. |
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48 */ |
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49 public abstract int getFlags(); |
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50 |
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51 /** |
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52 * Change the property's location. |
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53 * |
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54 * @return a Property with the new location (or {@code this} if the location is unchanged). |
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55 */ |
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56 public abstract Property relocate(Location newLocation); |
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57 |
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58 /** |
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59 * Gets the value of this property of the object. |
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60 * |
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61 * @param store the store that this property resides in |
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62 * @param shape the current shape of the object, which must contain this location |
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63 * @see DynamicObject#get(Object, Object) |
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64 */ |
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65 public abstract Object get(DynamicObject store, Shape shape); |
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66 |
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67 /** |
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68 * Gets the value of this property of the object. |
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69 * |
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70 * @param store the store that this property resides in |
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71 * @param condition the result of a shape check or {@code false} |
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72 * @see DynamicObject#get(Object, Object) |
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73 * @see #get(DynamicObject, Shape) |
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74 */ |
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75 public abstract Object get(DynamicObject store, boolean condition); |
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76 |
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77 /** |
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78 * Assigns value to this property of the object. |
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79 * |
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80 * Throws an exception if the value cannot be assigned to the property's current location. |
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81 * |
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82 * @param store the store that this property resides in |
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83 * @param value the value to assign |
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84 * @param shape the current shape of the object or {@code null} |
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85 * @throws IncompatibleLocationException if the value is incompatible with the property location |
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86 * @throws FinalLocationException if the location is final and values differ |
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87 * @see DynamicObject#set(Object, Object) |
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88 */ |
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89 public abstract void set(DynamicObject store, Object value, Shape shape) throws IncompatibleLocationException, FinalLocationException; |
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90 |
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91 /** |
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92 * Assigns value to this property of the object. |
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93 * |
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94 * Automatically relocates the property if the value cannot be assigned to its current location. |
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95 * |
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96 * @param shape the current shape of the object or {@code null} |
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97 */ |
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98 public abstract void setGeneric(DynamicObject store, Object value, Shape shape); |
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99 |
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100 /** |
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101 * Like {@link #set(DynamicObject, Object, Shape)}, but throws an {@link IllegalStateException} |
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102 * instead. |
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103 */ |
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104 public abstract void setSafe(DynamicObject store, Object value, Shape shape); |
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105 |
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106 /** |
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107 * Like {@link #setSafe}, but ignores the finalness of the property. For internal use only. |
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108 * |
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109 * @param store the store that this property resides in |
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110 * @param value the value to assign |
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111 */ |
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112 public abstract void setInternal(DynamicObject store, Object value); |
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113 |
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114 /** |
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115 * Assigns value to this property of the object, changing the object's shape. |
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116 * |
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117 * Combines {@link DynamicObject#setShapeAndGrow(Shape, Shape)} and |
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118 * {@link #set(DynamicObject, Object, Shape)} to an atomic operation. |
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119 * |
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120 * @param store the store that this property resides in |
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121 * @param value the value to assign |
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122 * @param oldShape the shape before the transition |
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123 * @param newShape the shape after the transition |
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124 * @throws IncompatibleLocationException if the value is incompatible with the property location |
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125 */ |
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126 public abstract void set(DynamicObject store, Object value, Shape oldShape, Shape newShape) throws IncompatibleLocationException; |
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127 |
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128 /** |
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129 * Assigns value to this property of the object, changing the object's shape. |
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130 * |
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131 * Combines {@link DynamicObject#setShapeAndGrow(Shape, Shape)} and |
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132 * {@link #setGeneric(DynamicObject, Object, Shape)} to an atomic operation. |
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133 * |
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134 * @param store the store that this property resides in |
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135 * @param value the value to assign |
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136 * @param oldShape the shape before the transition |
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137 * @param newShape the shape after the transition |
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138 */ |
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139 public abstract void setGeneric(DynamicObject store, Object value, Shape oldShape, Shape newShape); |
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140 |
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141 /** |
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142 * Assigns value to this property of the object, changing the object's shape. |
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143 * |
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144 * Combines {@link DynamicObject#setShapeAndGrow(Shape, Shape)} and |
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145 * {@link #setSafe(DynamicObject, Object, Shape)} to an atomic operation. |
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146 * |
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147 * @param store the store that this property resides in |
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148 * @param value the value to assign |
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149 * @param oldShape the shape before the transition |
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150 * @param newShape the shape after the transition |
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151 */ |
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152 public abstract void setSafe(DynamicObject store, Object value, Shape oldShape, Shape newShape); |
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153 |
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154 /** |
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155 * Returns {@code true} if this property and some other property have the same key and flags. |
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156 */ |
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157 public abstract boolean isSame(Property other); |
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158 |
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159 /** |
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160 * Get the property location. |
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161 */ |
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162 public abstract Location getLocation(); |
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163 |
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164 /** |
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165 * Is this property hidden from iteration. |
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166 * |
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167 * @see HiddenKey |
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168 */ |
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169 public abstract boolean isHidden(); |
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170 |
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171 public abstract boolean isShadow(); |
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172 |
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173 /** |
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174 * Create a copy of the property with the given flags. |
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175 */ |
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176 public abstract Property copyWithFlags(int newFlags); |
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177 |
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178 public abstract Property copyWithRelocatable(boolean newRelocatable); |
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179 } |