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annotate graal/com.oracle.truffle.api.object/src/com/oracle/truffle/api/object/Location.java @ 20907:06b0a2fb20a1
Truffle/Tools: the coverage tool will now ignore counts for any sources holding the tag CoverageTracker.Tags.NO_COVERAGE.
author | Michael Van De Vanter <michael.van.de.vanter@oracle.com> |
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date | Mon, 13 Apr 2015 11:05:58 -0700 |
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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 |
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29 /** |
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30 * Property location. |
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31 * |
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32 * @see Shape |
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33 * @see Property |
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34 * @see DynamicObject |
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35 */ |
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36 public abstract class Location implements BaseLocation { |
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37 protected static IncompatibleLocationException incompatibleLocation() throws IncompatibleLocationException { |
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38 CompilerDirectives.transferToInterpreterAndInvalidate(); |
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39 throw new IncompatibleLocationException(); |
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40 } |
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41 |
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42 protected static FinalLocationException finalLocation() throws FinalLocationException { |
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43 CompilerDirectives.transferToInterpreterAndInvalidate(); |
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44 throw new FinalLocationException(); |
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45 } |
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46 |
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47 public final Object get(DynamicObject store, Shape shape) { |
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48 return get(store, checkShape(store, shape)); |
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49 } |
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50 |
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51 public Object get(DynamicObject store, boolean condition) { |
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52 return getInternal(store); |
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53 } |
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54 |
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55 public void set(DynamicObject store, Object value, Shape shape) throws IncompatibleLocationException, FinalLocationException { |
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56 setInternal(store, value); |
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57 } |
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58 |
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59 public final void set(DynamicObject store, Object value, Shape oldShape, Shape newShape) throws IncompatibleLocationException { |
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60 if (canStore(value)) { |
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61 store.setShapeAndGrow(oldShape, newShape); |
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62 try { |
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63 setInternal(store, value); |
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64 } catch (IncompatibleLocationException ex) { |
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65 throw new IllegalStateException(); |
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66 } |
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67 } else { |
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68 throw incompatibleLocation(); |
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69 } |
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70 } |
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71 |
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72 public final void set(DynamicObject store, Object value) throws IncompatibleLocationException, FinalLocationException { |
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73 set(store, value, null); |
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74 } |
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75 |
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76 protected abstract Object getInternal(DynamicObject store); |
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77 |
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78 /** |
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79 * Like {@link #set(DynamicObject, Object, Shape)}, but does not invalidate final locations. For |
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80 * internal use only and subject to change, use {@link DynamicObjectFactory} to create objects |
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81 * with predefined properties. |
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82 * |
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83 * @throws IncompatibleLocationException if value is of non-assignable type |
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84 */ |
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85 protected abstract void setInternal(DynamicObject store, Object value) throws IncompatibleLocationException; |
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86 |
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87 /** |
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88 * Returns {@code true} if the location can be set to the value. |
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89 * |
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90 * @param store the receiver object |
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91 * @param value the value in question |
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92 */ |
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93 public boolean canSet(DynamicObject store, Object value) { |
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94 return canStore(value); |
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95 } |
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96 |
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97 /** |
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98 * Returns {@code true} if the location is compatible with the value. |
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99 * |
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100 * The value may still be rejected if {@link #canSet(DynamicObject, Object)} returns false. |
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101 * |
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102 * @param value the value in question |
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103 */ |
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104 public boolean canStore(Object value) { |
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105 return true; |
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106 } |
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107 |
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108 /** |
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109 * Returns {@code true} if this is a final location, i.e. readonly once set. |
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110 */ |
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111 public boolean isFinal() { |
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112 return false; |
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113 } |
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114 |
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115 /** |
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116 * Returns {@code true} if this is an immutable constant location. |
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117 */ |
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118 public boolean isConstant() { |
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119 return false; |
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120 } |
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121 |
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122 /* |
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123 * Abstract to force overriding. |
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124 */ |
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125 @Override |
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126 public abstract int hashCode(); |
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127 |
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128 /* |
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129 * Abstract to force overriding. |
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130 */ |
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131 @Override |
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132 public abstract boolean equals(Object obj); |
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133 |
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134 protected static boolean checkShape(DynamicObject store, Shape shape) { |
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135 return store.getShape() == shape; |
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136 } |
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137 } |