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annotate graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/nodes/access/SLReadPropertyCacheNode.java @ 18412:997bc9764a9a

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SL: use the truffle object storage model to represent SL objects
author Andreas Woess <andreas.woess@jku.at>
date Tue, 18 Nov 2014 12:08:51 +0100
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children ccb97347d874
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997bc9764a9a SL: use the truffle object storage model to represent SL objects
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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.sl.nodes.access;
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24
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25 import com.oracle.truffle.api.*;
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26 import com.oracle.truffle.api.nodes.*;
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27 import com.oracle.truffle.api.object.*;
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28 import com.oracle.truffle.sl.nodes.*;
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29 import com.oracle.truffle.sl.runtime.*;
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30
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31 /**
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32 * The node for accessing a property of an object. When executed, this node first evaluates the
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33 * object expression on the left side of the dot operator and then reads the named property.
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34 */
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35 public abstract class SLReadPropertyCacheNode extends Node {
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36
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37 public static SLReadPropertyCacheNode create(String propertyName) {
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38 return new SLUninitializedReadObjectPropertyNode(propertyName);
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39 }
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40
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41 public abstract Object executeObject(DynamicObject receiver);
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42
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43 public abstract long executeLong(DynamicObject receiver) throws UnexpectedResultException;
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44
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45 protected abstract static class SLReadPropertyCacheChainNode extends SLReadPropertyCacheNode {
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46 protected final Shape shape;
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47 @Child protected SLReadPropertyCacheNode next;
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48
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49 public SLReadPropertyCacheChainNode(Shape shape, SLReadPropertyCacheNode next) {
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50 this.shape = shape;
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51 this.next = next;
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52 }
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53
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54 @Override
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55 public final Object executeObject(DynamicObject receiver) {
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56 try {
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57 // if this assumption fails, the object needs to be updated to a valid shape
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58 shape.getValidAssumption().check();
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59 } catch (InvalidAssumptionException e) {
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60 return this.replace(next).executeObject(receiver);
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61 }
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62
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63 boolean condition = shape.check(receiver);
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64
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65 if (condition) {
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66 return executeObjectUnchecked(receiver, condition);
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67 } else {
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68 return next.executeObject(receiver);
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69 }
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70 }
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71
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72 @Override
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73 public final long executeLong(DynamicObject receiver) throws UnexpectedResultException {
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74 try {
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75 // if this assumption fails, the object needs to be updated to a valid shape
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76 shape.getValidAssumption().check();
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77 } catch (InvalidAssumptionException e) {
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78 return this.replace(next).executeLong(receiver);
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79 }
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80
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81 boolean condition = shape.check(receiver);
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82
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83 if (condition) {
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84 return executeLongUnchecked(receiver, condition);
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85 } else {
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86 return next.executeLong(receiver);
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87 }
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88 }
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89
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90 protected abstract Object executeObjectUnchecked(DynamicObject receiver, boolean condition);
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91
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92 protected long executeLongUnchecked(DynamicObject receiver, boolean condition) throws UnexpectedResultException {
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93 return SLTypesGen.SLTYPES.expectLong(executeObjectUnchecked(receiver, condition));
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94 }
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95 }
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96
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97 protected static class SLReadObjectPropertyNode extends SLReadPropertyCacheChainNode {
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98 private final Location location;
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99
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100 protected SLReadObjectPropertyNode(Shape shape, Location location, SLReadPropertyCacheNode next) {
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101 super(shape, next);
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102 this.location = location;
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103 }
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104
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105 @Override
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106 protected Object executeObjectUnchecked(DynamicObject receiver, boolean condition) {
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107 return location.get(receiver, condition);
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108 }
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109 }
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110
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111 protected static class SLReadBooleanPropertyNode extends SLReadPropertyCacheChainNode {
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112 private final BooleanLocation location;
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113
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114 protected SLReadBooleanPropertyNode(Shape shape, BooleanLocation location, SLReadPropertyCacheNode next) {
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115 super(shape, next);
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116 this.location = location;
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117 }
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118
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119 @Override
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120 protected Object executeObjectUnchecked(DynamicObject receiver, boolean condition) {
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121 return location.getBoolean(receiver, condition);
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122 }
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123 }
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124
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125 protected static class SLReadLongPropertyNode extends SLReadPropertyCacheChainNode {
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126 private final LongLocation location;
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127
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128 protected SLReadLongPropertyNode(Shape shape, LongLocation location, SLReadPropertyCacheNode next) {
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129 super(shape, next);
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130 this.location = location;
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131 }
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132
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133 @Override
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134 protected Object executeObjectUnchecked(DynamicObject receiver, boolean condition) {
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135 return location.getLong(receiver, condition);
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136 }
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137
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138 @Override
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139 protected long executeLongUnchecked(DynamicObject receiver, boolean condition) throws UnexpectedResultException {
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140 return location.getLong(receiver, condition);
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141 }
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142 }
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143
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144 protected static class SLReadMissingPropertyNode extends SLReadPropertyCacheChainNode {
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145 protected SLReadMissingPropertyNode(Shape shape, SLReadPropertyCacheNode next) {
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146 super(shape, next);
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147 }
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148
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149 @Override
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150 protected Object executeObjectUnchecked(DynamicObject receiver, boolean condition) {
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151 // The property was not found in the object, return null
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152 return SLNull.SINGLETON;
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153 }
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154 }
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155
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156 protected static class SLUninitializedReadObjectPropertyNode extends SLReadPropertyCacheNode {
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157 protected final String propertyName;
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158
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159 protected SLUninitializedReadObjectPropertyNode(String propertyName) {
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160 this.propertyName = propertyName;
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161 }
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162
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163 @Override
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164 public Object executeObject(DynamicObject receiver) {
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165 CompilerDirectives.transferToInterpreterAndInvalidate();
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166
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167 receiver.updateShape();
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168
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169 Shape shape = receiver.getShape();
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170 Property property = shape.getProperty(propertyName);
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171
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172 final SLReadPropertyCacheNode resolvedNode;
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173 if (property == null) {
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174 resolvedNode = new SLReadMissingPropertyNode(shape, this);
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175 } else if (property.getLocation() instanceof LongLocation) {
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176 resolvedNode = new SLReadLongPropertyNode(shape, (LongLocation) property.getLocation(), this);
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177 } else if (property.getLocation() instanceof BooleanLocation) {
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178 resolvedNode = new SLReadBooleanPropertyNode(shape, (BooleanLocation) property.getLocation(), this);
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179 } else {
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180 resolvedNode = new SLReadObjectPropertyNode(shape, property.getLocation(), this);
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181 }
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182
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183 return this.replace(resolvedNode, "resolved '" + propertyName + "'").executeObject(receiver);
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184 }
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185
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186 @Override
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187 public long executeLong(DynamicObject receiver) throws UnexpectedResultException {
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188 return SLTypesGen.SLTYPES.expectLong(executeObject(receiver));
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189 }
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190 }
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191 }