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annotate truffle/com.oracle.truffle.sl/src/com/oracle/truffle/sl/runtime/SLContext.java @ 21997:c07e64ecb528

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Update SL copyright headers to use UPL
author Gilles Duboscq <gilles.m.duboscq@oracle.com>
date Thu, 16 Jul 2015 15:50:46 +0200
parents 9c8c0937da41
children 5bc7f7b867ab
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 * The Universal Permissive License (UPL), Version 1.0
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6 *
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7 * Subject to the condition set forth below, permission is hereby granted to any
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8 * person obtaining a copy of this software, associated documentation and/or
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9 * data (collectively the "Software"), free of charge and under any and all
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10 * copyright rights in the Software, and any and all patent rights owned or
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11 * freely licensable by each licensor hereunder covering either (i) the
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12 * unmodified Software as contributed to or provided by such licensor, or (ii)
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13 * the Larger Works (as defined below), to deal in both
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14 *
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15 * (a) the Software, and
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16 *
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17 * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
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18 * one is included with the Software each a "Larger Work" to which the Software
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19 * is contributed by such licensors),
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20 *
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21 * without restriction, including without limitation the rights to copy, create
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22 * derivative works of, display, perform, and distribute the Software and make,
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23 * use, sell, offer for sale, import, export, have made, and have sold the
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24 * Software and the Larger Work(s), and to sublicense the foregoing rights on
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25 * either these or other terms.
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26 *
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27 * This license is subject to the following condition:
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28 *
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29 * The above copyright notice and either this complete permission notice or at a
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30 * minimum a reference to the UPL must be included in all copies or substantial
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31 * portions of the Software.
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32 *
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33 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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34 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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35 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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36 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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37 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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38 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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39 * SOFTWARE.
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40 */
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41 package com.oracle.truffle.sl.runtime;
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42
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43 import java.io.*;
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44
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45 import com.oracle.truffle.api.*;
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46 import com.oracle.truffle.api.dsl.*;
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47 import com.oracle.truffle.api.frame.*;
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48 import com.oracle.truffle.api.nodes.*;
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49 import com.oracle.truffle.api.object.*;
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50 import com.oracle.truffle.api.source.*;
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51 import com.oracle.truffle.sl.builtins.*;
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52 import com.oracle.truffle.sl.nodes.*;
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53 import com.oracle.truffle.sl.nodes.local.*;
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54 import com.oracle.truffle.sl.parser.*;
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55
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56 /**
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57 * The run-time state of SL during execution. One context is instantiated before any source code is
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58 * parsed, and this context is passed around to all methods that need access to it. For example, the
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59 * context is used during {@link SLNodeFactory parsing} and by {@link SLBuiltinNode#getContext()
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60 * builtin functions}.
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61 * <p>
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62 * It would be an error to have two different context instances during the execution of one script.
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63 * However, if two separate scripts run in one Java VM at the same time, they have a different
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64 * context. Therefore, the context is not a singleton.
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65 */
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66 public final class SLContext extends ExecutionContext {
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67 private static final Layout LAYOUT = Layout.createLayout();
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68
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69 private final BufferedReader input;
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70 private final PrintWriter output;
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71 private final SLFunctionRegistry functionRegistry;
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72 private final Shape emptyShape;
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73
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74 public SLContext(BufferedReader input, PrintWriter output) {
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75 this.input = input;
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76 this.output = output;
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77 this.functionRegistry = new SLFunctionRegistry();
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78 installBuiltins();
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79
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80 this.emptyShape = LAYOUT.createShape(new ObjectType());
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81 }
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82
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83 /**
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84 * Returns the default input, i.e., the source for the {@link SLReadlnBuiltin}. To allow unit
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85 * testing, we do not use {@link System#in} directly.
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86 */
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87 public BufferedReader getInput() {
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88 return input;
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89 }
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90
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91 /**
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92 * The default default, i.e., the output for the {@link SLPrintlnBuiltin}. To allow unit
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93 * testing, we do not use {@link System#out} directly.
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94 */
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95 public PrintWriter getOutput() {
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96 return output;
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97 }
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98
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99 /**
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100 * Returns the registry of all functions that are currently defined.
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101 */
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102 public SLFunctionRegistry getFunctionRegistry() {
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103 return functionRegistry;
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104 }
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105
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106 /**
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107 * Adds all builtin functions to the {@link SLFunctionRegistry}. This method lists all
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108 * {@link SLBuiltinNode builtin implementation classes}.
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109 */
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110 private void installBuiltins() {
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111 installBuiltin(SLReadlnBuiltinFactory.getInstance());
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112 installBuiltin(SLPrintlnBuiltinFactory.getInstance());
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113 installBuiltin(SLNanoTimeBuiltinFactory.getInstance());
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114 installBuiltin(SLDefineFunctionBuiltinFactory.getInstance());
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115 installBuiltin(SLStackTraceBuiltinFactory.getInstance());
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116 installBuiltin(SLHelloEqualsWorldBuiltinFactory.getInstance());
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117 installBuiltin(SLAssertTrueBuiltinFactory.getInstance());
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118 installBuiltin(SLAssertFalseBuiltinFactory.getInstance());
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119 installBuiltin(SLNewObjectBuiltinFactory.getInstance());
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120 }
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121
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122 public void installBuiltin(NodeFactory<? extends SLBuiltinNode> factory) {
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123 /*
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124 * The builtin node factory is a class that is automatically generated by the Truffle DSL.
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125 * The signature returned by the factory reflects the signature of the @Specialization
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126 * methods in the builtin classes.
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127 */
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128 int argumentCount = factory.getExecutionSignature().size();
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129 SLExpressionNode[] argumentNodes = new SLExpressionNode[argumentCount];
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130 /*
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131 * Builtin functions are like normal functions, i.e., the arguments are passed in as an
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132 * Object[] array encapsulated in SLArguments. A SLReadArgumentNode extracts a parameter
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133 * from this array.
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134 */
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135 for (int i = 0; i < argumentCount; i++) {
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136 argumentNodes[i] = new SLReadArgumentNode(null, i);
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137 }
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138 /* Instantiate the builtin node. This node performs the actual functionality. */
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139 SLBuiltinNode builtinBodyNode = factory.createNode(argumentNodes, this);
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140 /* The name of the builtin function is specified via an annotation on the node class. */
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141 String name = lookupNodeInfo(builtinBodyNode.getClass()).shortName();
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142 /* Wrap the builtin in a RootNode. Truffle requires all AST to start with a RootNode. */
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143 SLRootNode rootNode = new SLRootNode(this, new FrameDescriptor(), builtinBodyNode, name);
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144
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145 /* Register the builtin function in our function registry. */
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146 getFunctionRegistry().register(name, rootNode);
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147 }
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148
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149 public static NodeInfo lookupNodeInfo(Class<?> clazz) {
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150 if (clazz == null) {
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151 return null;
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152 }
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153 NodeInfo info = clazz.getAnnotation(NodeInfo.class);
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154 if (info != null) {
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155 return info;
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156 } else {
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157 return lookupNodeInfo(clazz.getSuperclass());
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158 }
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159 }
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160
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161 /**
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162 * Evaluate a source, causing any definitions to be registered (but not executed).
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163 *
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164 * @param source The {@link Source} to parse.
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165 */
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166 public void evalSource(Source source) {
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167 Parser.parseSL(this, source);
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168 }
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169
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170 public DynamicObject createObject() {
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171 return LAYOUT.newInstance(emptyShape);
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172 }
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173
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174 public static boolean isSLObject(Object value) {
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175 return LAYOUT.getType().isInstance(value);
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176 }
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177
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178 public static DynamicObject castSLObject(Object value) {
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179 return LAYOUT.getType().cast(value);
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180 }
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181 }