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annotate truffle/com.oracle.truffle.api.object/src/com/oracle/truffle/api/object/DynamicObject.java @ 22157:dc83cc1f94f2

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Using fully qualified imports
author Jaroslav Tulach <jaroslav.tulach@oracle.com>
date Wed, 16 Sep 2015 11:33:22 +0200
parents 72a6b0e49d31
children
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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.TypedObject;
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28 import com.oracle.truffle.api.interop.TruffleObject;
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29
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30 /**
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31 * Represents an object members of which can be dynamically added and removed at run time.
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32 *
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33 * @see Shape
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34 */
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35 public abstract class DynamicObject implements TypedObject, TruffleObject {
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36 /**
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37 * Get the object's current shape.
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38 */
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39 public abstract Shape getShape();
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40
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41 /**
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42 * Get property value.
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43 *
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44 * @param key property identifier
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45 * @return property value or {@code null} if object has no such property
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46 */
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47 public final Object get(Object key) {
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48 return get(key, null);
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49 }
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50
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51 /**
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52 * Get property value.
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53 *
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54 * @param key property identifier
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55 * @param defaultValue return value if property is not found
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56 * @return property value or defaultValue if object has no such property
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57 */
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58 public abstract Object get(Object key, Object defaultValue);
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59
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60 /**
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61 * Set value of existing property.
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62 *
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63 * @param key property identifier
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64 * @param value value to be set
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65 * @return {@code true} if successful or {@code false} if property not found
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66 */
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67 public abstract boolean set(Object key, Object value);
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68
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69 /**
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70 * Returns {@code true} if this object contains a property with the given key.
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71 */
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72 public final boolean containsKey(Object key) {
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73 return getShape().getProperty(key) != null;
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74 }
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75
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76 /**
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77 * Define new property or redefine existing property.
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78 *
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79 * @param key property identifier
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80 * @param value value to be set
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81 */
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82 public final void define(Object key, Object value) {
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83 define(key, value, 0);
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84 }
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85
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86 /**
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87 * Define new property or redefine existing property.
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88 *
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89 * @param key property identifier
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90 * @param value value to be set
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91 * @param flags flags to be set
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92 */
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93 public abstract void define(Object key, Object value, int flags);
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94
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95 /**
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96 * Define new property with a static location or change existing property.
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97 *
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98 * @param key property identifier
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99 * @param value value to be set
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100 * @param flags flags to be set
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101 * @param locationFactory factory function that creates a location for a given shape and value
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102 */
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103 public abstract void define(Object key, Object value, int flags, LocationFactory locationFactory);
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104
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105 /**
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106 * Delete property.
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107 *
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108 * @param key property identifier
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109 * @return {@code true} if successful or {@code false} if property not found
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110 */
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111 public abstract boolean delete(Object key);
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112
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113 /**
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114 * Returns the number of properties in this object.
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115 */
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116 public abstract int size();
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117
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118 /**
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119 * Returns {@code true} if this object contains no properties.
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120 */
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121 public abstract boolean isEmpty();
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122
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123 /**
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124 * Set object shape and grow storage if necessary.
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125 *
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126 * @param oldShape the object's current shape (must equal {@link #getShape()})
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127 * @param newShape the new shape to be set
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128 */
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129 public abstract void setShapeAndGrow(Shape oldShape, Shape newShape);
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130
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131 /**
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132 * Set object shape and resize storage if necessary.
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133 *
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134 * @param oldShape the object's current shape (must equal {@link #getShape()})
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135 * @param newShape the new shape to be set
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136 */
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137 public abstract void setShapeAndResize(Shape oldShape, Shape newShape);
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138
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139 /**
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140 * Ensure object shape is up-to-date.
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141 *
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142 * @return {@code true} if shape has changed
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143 */
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144 public abstract boolean updateShape();
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145
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146 /**
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147 * Create a shallow copy of this object.
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148 *
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149 * @param currentShape the object's current shape (must equal {@link #getShape()})
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150 */
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151 public abstract DynamicObject copy(Shape currentShape);
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152 }