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annotate truffle/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/NodeClass.java @ 22372:6598b9b7aafd

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author Christian Wirth <christian.wirth@oracle.com>
date Tue, 17 Nov 2015 11:02:55 +0100
parents 0d4b0e4263ee
children 07c98b5a9496
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1 /*
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2 * Copyright (c) 2012, 2015, 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.nodes;
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26
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27 import com.oracle.truffle.api.nodes.Node.Child;
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28 import com.oracle.truffle.api.nodes.Node.Children;
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29 import com.oracle.truffle.api.nodes.NodeFieldAccessor.NodeFieldKind;
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30 import java.lang.reflect.Field;
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31 import java.lang.reflect.Modifier;
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32 import java.security.AccessController;
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33 import java.security.PrivilegedAction;
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34 import java.util.ArrayList;
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35 import java.util.Iterator;
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36 import java.util.List;
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37
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38 /**
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39 * Information about a {@link Node} class. A single instance of this class is allocated for every
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40 * subclass of {@link Node} that is used.
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41 */
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42 public final class NodeClass {
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43 private static final ClassValue<NodeClass> nodeClasses = new ClassValue<NodeClass>() {
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44 @SuppressWarnings("unchecked")
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45 @Override
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46 protected NodeClass computeValue(final Class<?> clazz) {
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47 assert Node.class.isAssignableFrom(clazz);
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48 return AccessController.doPrivileged(new PrivilegedAction<NodeClass>() {
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49 public NodeClass run() {
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50 return new NodeClass((Class<? extends Node>) clazz);
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51 }
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52 });
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53 }
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54 };
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55
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56 private static final NodeFieldAccessor[] EMPTY_NODE_FIELD_ARRAY = new NodeFieldAccessor[0];
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57
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58 // The comprehensive list of all fields.
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59 private final NodeFieldAccessor[] fields;
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60 // Separate arrays for the frequently accessed fields.
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61 private final NodeFieldAccessor parentField;
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62 private final NodeFieldAccessor nodeClassField;
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63 private final NodeFieldAccessor[] childFields;
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64 private final NodeFieldAccessor[] childrenFields;
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65 private final NodeFieldAccessor[] cloneableFields;
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66
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67 private final Class<? extends Node> clazz;
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68
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69 public static NodeClass get(Class<? extends Node> clazz) {
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70 return nodeClasses.get(clazz);
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71 }
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72
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73 public static NodeClass get(Node node) {
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74 return node.getNodeClass();
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75 }
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76
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77 NodeClass(Class<? extends Node> clazz) {
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78 List<NodeFieldAccessor> fieldsList = new ArrayList<>();
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79 NodeFieldAccessor parentFieldTmp = null;
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80 NodeFieldAccessor nodeClassFieldTmp = null;
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81 List<NodeFieldAccessor> childFieldList = new ArrayList<>();
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82 List<NodeFieldAccessor> childrenFieldList = new ArrayList<>();
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83 List<NodeFieldAccessor> cloneableFieldList = new ArrayList<>();
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84
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85 for (Field field : NodeUtil.getAllFields(clazz)) {
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86 if (Modifier.isStatic(field.getModifiers()) || field.isSynthetic()) {
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87 continue;
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88 }
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89
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90 NodeFieldAccessor nodeField;
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91 if (field.getDeclaringClass() == Node.class && field.getName().equals("parent")) {
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92 assert Node.class.isAssignableFrom(field.getType());
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93 nodeField = NodeFieldAccessor.create(NodeFieldKind.PARENT, field);
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94 parentFieldTmp = nodeField;
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95 } else if (field.getDeclaringClass() == Node.class && field.getName().equals("nodeClass")) {
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96 assert NodeClass.class.isAssignableFrom(field.getType());
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97 nodeField = NodeFieldAccessor.create(NodeFieldKind.NODE_CLASS, field);
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98 nodeClassFieldTmp = nodeField;
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99 } else if (field.getAnnotation(Child.class) != null) {
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100 checkChildField(field);
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101 nodeField = NodeFieldAccessor.create(NodeFieldKind.CHILD, field);
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102 childFieldList.add(nodeField);
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103 } else if (field.getAnnotation(Children.class) != null) {
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104 checkChildrenField(field);
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105 nodeField = NodeFieldAccessor.create(NodeFieldKind.CHILDREN, field);
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106 childrenFieldList.add(nodeField);
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107 } else {
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108 nodeField = NodeFieldAccessor.create(NodeFieldKind.DATA, field);
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109 if (NodeCloneable.class.isAssignableFrom(field.getType())) {
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110 cloneableFieldList.add(nodeField);
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111 }
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112 }
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113 fieldsList.add(nodeField);
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114 }
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115
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116 if (parentFieldTmp == null) {
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117 throw new AssertionError("parent field not found");
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118 }
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119
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120 this.fields = fieldsList.toArray(EMPTY_NODE_FIELD_ARRAY);
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121 this.nodeClassField = nodeClassFieldTmp;
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122 this.parentField = parentFieldTmp;
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123 this.childFields = childFieldList.toArray(EMPTY_NODE_FIELD_ARRAY);
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124 this.childrenFields = childrenFieldList.toArray(EMPTY_NODE_FIELD_ARRAY);
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125 this.cloneableFields = cloneableFieldList.toArray(EMPTY_NODE_FIELD_ARRAY);
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126 this.clazz = clazz;
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127 }
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128
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129 public NodeFieldAccessor getNodeClassField() {
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130 return nodeClassField;
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131 }
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132
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133 public NodeFieldAccessor[] getCloneableFields() {
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134 return cloneableFields;
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135 }
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136
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137 private static boolean isNodeType(Class<?> clazz) {
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138 return Node.class.isAssignableFrom(clazz) || (clazz.isInterface() && NodeInterface.class.isAssignableFrom(clazz));
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139 }
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140
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141 private static void checkChildField(Field field) {
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142 if (!isNodeType(field.getType())) {
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143 throw new AssertionError("@Child field type must be a subclass of Node or an interface extending NodeInterface (" + field + ")");
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144 }
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145 if (Modifier.isFinal(field.getModifiers())) {
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146 throw new AssertionError("@Child field must not be final (" + field + ")");
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147 }
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Christian Humer <christian.humer@gmail.com>
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148 }
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Christian Humer <christian.humer@gmail.com>
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149
22372
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150 private static void checkChildrenField(Field field) {
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151 if (!(field.getType().isArray() && isNodeType(field.getType().getComponentType()))) {
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152 throw new AssertionError("@Children field type must be an array of a subclass of Node or an interface extending NodeInterface (" + field + ")");
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153 }
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154 if (!Modifier.isFinal(field.getModifiers())) {
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155 throw new AssertionError("@Children field must be final (" + field + ")");
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156 }
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Christian Humer <christian.humer@gmail.com>
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157 }
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158
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159 public NodeFieldAccessor[] getFields() {
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160 return fields;
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161 }
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162
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163 public NodeFieldAccessor getParentField() {
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164 return parentField;
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165 }
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166
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167 public NodeFieldAccessor[] getChildFields() {
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168 return childFields;
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169 }
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170
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171 public NodeFieldAccessor[] getChildrenFields() {
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172 return childrenFields;
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173 }
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174
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175 @Override
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176 public int hashCode() {
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177 return clazz.hashCode();
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178 }
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179
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180 @Override
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181 public boolean equals(Object obj) {
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diff changeset
182 if (obj instanceof NodeClass) {
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diff changeset
183 NodeClass other = (NodeClass) obj;
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184 return clazz.equals(other.clazz);
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185 }
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186 return false;
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187 }
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188
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189 public Iterator<Node> makeIterator(Node node) {
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190 assert clazz.isInstance(node);
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diff changeset
191 return new NodeIterator(this, node);
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192 }
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diff changeset
193
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194 private static final class NodeIterator implements Iterator<Node> {
20129
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195 private final NodeFieldAccessor[] childFields;
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196 private final NodeFieldAccessor[] childrenFields;
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Christian Humer <christian.humer@gmail.com>
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197 private final Node node;
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198 private final int childrenCount;
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diff changeset
199 private int index;
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parents:
diff changeset
200
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diff changeset
201 protected NodeIterator(NodeClass nodeClass, Node node) {
20129
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202 this.childFields = nodeClass.getChildFields();
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203 this.childrenFields = nodeClass.getChildrenFields();
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diff changeset
204 this.node = node;
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Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
205 this.childrenCount = childrenCount();
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Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
206 this.index = 0;
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Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
207 }
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Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
208
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
209 private int childrenCount() {
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Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
210 int nodeCount = childFields.length;
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Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
211 for (NodeFieldAccessor childrenField : childrenFields) {
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
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parents:
diff changeset
212 Object[] children = ((Object[]) childrenField.getObject(node));
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Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
213 if (children != null) {
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Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
214 nodeCount += children.length;
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Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
215 }
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Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
216 }
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
217 return nodeCount;
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
218 }
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
219
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Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
220 private Node nodeAt(int idx) {
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Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
221 int nodeCount = childFields.length;
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
222 if (idx < nodeCount) {
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
223 return (Node) childFields[idx].getObject(node);
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
224 } else {
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
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parents:
diff changeset
225 for (NodeFieldAccessor childrenField : childrenFields) {
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parents:
diff changeset
226 Object[] nodeArray = (Object[]) childrenField.getObject(node);
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
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parents:
diff changeset
227 if (idx < nodeCount + nodeArray.length) {
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
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parents:
diff changeset
228 return (Node) nodeArray[idx - nodeCount];
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Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
229 }
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
230 nodeCount += nodeArray.length;
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
231 }
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
232 }
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
233 return null;
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
234 }
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
235
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
236 private void forward() {
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
237 if (index < childrenCount) {
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
238 index++;
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
239 }
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
240 }
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
241
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
242 public boolean hasNext() {
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Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
243 return index < childrenCount;
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
244 }
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
245
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
246 public Node next() {
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
247 try {
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
248 return nodeAt(index);
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
249 } finally {
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
250 forward();
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
251 }
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
252 }
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
253
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
254 public void remove() {
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
255 throw new UnsupportedOperationException();
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
256 }
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
257 }
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
258 }