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annotate truffle/com.oracle.truffle.api.object/src/com/oracle/truffle/api/object/DynamicObject.java @ 21951:9c8c0937da41

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Moving all sources into truffle subdirectory
author Jaroslav Tulach <jaroslav.tulach@oracle.com>
date Wed, 17 Jun 2015 10:58:08 +0200
parents graal/com.oracle.truffle.api.object/src/com/oracle/truffle/api/object/DynamicObject.java@5f3dda39d205
children 485481716f0e
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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. 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 import com.oracle.truffle.api.*;
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28 import com.oracle.truffle.api.interop.*;
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29
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30 public abstract class DynamicObject implements TypedObject, TruffleObject {
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31 /**
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32 * Get the object's current shape.
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33 */
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34 public abstract Shape getShape();
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35
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36 /**
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37 * Get property value.
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38 *
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39 * @param key property identifier
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40 * @param defaultValue return value if property is not found
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41 * @return property value or defaultValue if object has no such property
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42 */
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43 public abstract Object get(Object key, Object defaultValue);
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44
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45 /**
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46 * Set value of existing property.
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47 *
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48 * @param key property identifier
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49 * @param value value to be set
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50 * @return {@code true} if successful or {@code false} if property not found
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51 */
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52 public abstract boolean set(Object key, Object value);
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53
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54 /**
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55 * Returns {@code true} if this object contains a property with the given key.
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56 */
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57 public final boolean containsKey(Object key) {
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58 return getShape().getProperty(key) != null;
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59 }
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60
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61 /**
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62 * Define new property or redefine existing property.
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63 *
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64 * @param key property identifier
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65 * @param value value to be set
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66 */
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67 public final void define(Object key, Object value) {
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68 define(key, value, 0);
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69 }
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70
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71 /**
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72 * Define new property or redefine existing property.
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73 *
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74 * @param key property identifier
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75 * @param value value to be set
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76 * @param flags flags to be set
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77 */
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78 public abstract void define(Object key, Object value, int flags);
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79
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80 /**
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81 * Define new property with a static location or change existing property.
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82 *
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83 * @param key property identifier
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84 * @param value value to be set
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85 * @param flags flags to be set
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86 * @param locationFactory factory function that creates a location for a given shape and value
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87 */
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88 public abstract void define(Object key, Object value, int flags, LocationFactory locationFactory);
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89
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90 /**
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91 * Change property flags.
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92 *
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93 * @param key property identifier
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94 * @param newFlags flags to be set
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95 * @return {@code true} if successful or {@code false} if property not found
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96 */
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97 public abstract boolean changeFlags(Object key, int newFlags);
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98
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99 /**
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100 * Change property flags.
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101 *
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102 * @param key property identifier
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103 * @param flagsUpdateFunction function updating old flags to new flags
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104 * @return {@code true} if successful or {@code false} if property not found
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105 */
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106 public abstract boolean changeFlags(Object key, FlagsFunction flagsUpdateFunction);
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107
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108 /**
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109 * Delete property.
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110 *
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111 * @param key property identifier
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112 * @return {@code true} if successful or {@code false} if property not found
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113 */
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114 public abstract boolean delete(Object key);
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115
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116 /**
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117 * Returns the number of properties in this object.
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118 */
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119 public abstract int size();
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120
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121 /**
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122 * Returns {@code true} if this object contains no properties.
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123 */
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124 public abstract boolean isEmpty();
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125
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126 /**
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127 * Set object shape and grow storage if necessary.
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128 *
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129 * @param oldShape the object's current shape (must equal {@link #getShape()})
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130 * @param newShape the new shape to be set
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131 */
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132 public abstract void setShapeAndGrow(Shape oldShape, Shape newShape);
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133
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134 /**
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135 * Set object shape and resize storage if necessary.
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136 *
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137 * @param oldShape the object's current shape (must equal {@link #getShape()})
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138 * @param newShape the new shape to be set
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139 */
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140 public abstract void setShapeAndResize(Shape oldShape, Shape newShape);
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141
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142 /**
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143 * Ensure object shape is up-to-date.
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144 *
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145 * @return {@code true} if shape has changed
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146 */
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147 public abstract boolean updateShape();
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148
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149 public interface FlagsFunction {
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150 int apply(int t);
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151 }
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152 }