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annotate truffle/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/NodeClassImpl.java @ 22399:efbc311e9ff2

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Turning NodeClass into abstract class to allow its independent implementations.
author Jaroslav Tulach <jaroslav.tulach@oracle.com>
date Fri, 20 Nov 2015 10:36:52 +0100
parents truffle/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/NodeClass.java@07c98b5a9496
children 5033b980cc68
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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 java.lang.reflect.Field;
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28 import java.lang.reflect.Modifier;
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29 import java.util.ArrayList;
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30 import java.util.Iterator;
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31 import java.util.List;
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32
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33 import com.oracle.truffle.api.nodes.Node.Child;
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34 import com.oracle.truffle.api.nodes.Node.Children;
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35 import com.oracle.truffle.api.nodes.NodeFieldAccessor.NodeFieldKind;
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36
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37 /**
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38 * Information about a {@link Node} class. A single instance of this class is allocated for every
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39 * subclass of {@link Node} that is used.
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40 */
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41 final class NodeClassImpl extends NodeClass {
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42 private static final NodeFieldAccessor[] EMPTY_NODE_FIELD_ARRAY = new NodeFieldAccessor[0];
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43
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44 // The comprehensive list of all fields.
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45 private final NodeFieldAccessor[] fields;
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46 // Separate arrays for the frequently accessed fields.
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47 private final NodeFieldAccessor parentField;
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48 private final NodeFieldAccessor nodeClassField;
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49 private final NodeFieldAccessor[] childFields;
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50 private final NodeFieldAccessor[] childrenFields;
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51 private final NodeFieldAccessor[] cloneableFields;
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52
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53 private final Class<? extends Node> clazz;
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54
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55 NodeClassImpl(Class<? extends Node> clazz) {
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56 if (!Node.class.isAssignableFrom(clazz)) {
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57 throw new IllegalArgumentException();
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58 }
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59
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60 List<NodeFieldAccessor> fieldsList = new ArrayList<>();
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61 NodeFieldAccessor parentFieldTmp = null;
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62 NodeFieldAccessor nodeClassFieldTmp = null;
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63 List<NodeFieldAccessor> childFieldList = new ArrayList<>();
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64 List<NodeFieldAccessor> childrenFieldList = new ArrayList<>();
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65 List<NodeFieldAccessor> cloneableFieldList = new ArrayList<>();
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66
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67 try {
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68 Field field = Node.class.getDeclaredField("parent");
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69 assert Node.class.isAssignableFrom(field.getType());
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70 parentFieldTmp = NodeFieldAccessor.create(NodeFieldKind.PARENT, field);
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71 field = Node.class.getDeclaredField("nodeClass");
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72 assert NodeClass.class.isAssignableFrom(field.getType());
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73 nodeClassFieldTmp = NodeFieldAccessor.create(NodeFieldKind.NODE_CLASS, field);
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74 } catch (NoSuchFieldException e) {
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75 throw new AssertionError("Node field not found", e);
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76 }
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77
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78 collectInstanceFields(clazz, fieldsList, childFieldList, childrenFieldList, cloneableFieldList);
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79
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80 this.fields = fieldsList.toArray(EMPTY_NODE_FIELD_ARRAY);
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81 this.nodeClassField = nodeClassFieldTmp;
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82 this.parentField = parentFieldTmp;
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83 this.childFields = childFieldList.toArray(EMPTY_NODE_FIELD_ARRAY);
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84 this.childrenFields = childrenFieldList.toArray(EMPTY_NODE_FIELD_ARRAY);
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85 this.cloneableFields = cloneableFieldList.toArray(EMPTY_NODE_FIELD_ARRAY);
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86 this.clazz = clazz;
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87 }
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88
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89 private static void collectInstanceFields(Class<? extends Object> clazz, List<NodeFieldAccessor> fieldsList, List<NodeFieldAccessor> childFieldList, List<NodeFieldAccessor> childrenFieldList,
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90 List<NodeFieldAccessor> cloneableFieldList) {
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91 if (clazz.getSuperclass() != null) {
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92 collectInstanceFields(clazz.getSuperclass(), fieldsList, childFieldList, childrenFieldList, cloneableFieldList);
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93 }
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94 Field[] declaredFields = clazz.getDeclaredFields();
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95 for (Field field : declaredFields) {
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96 if (Modifier.isStatic(field.getModifiers()) || field.isSynthetic()) {
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97 continue;
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98 }
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99
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100 NodeFieldAccessor nodeField;
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101 if (field.getDeclaringClass() == Node.class && (field.getName().equals("parent") || field.getName().equals("nodeClass"))) {
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102 continue;
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103 } else if (field.getAnnotation(Child.class) != null) {
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104 checkChildField(field);
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105 nodeField = NodeFieldAccessor.create(NodeFieldKind.CHILD, field);
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106 childFieldList.add(nodeField);
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107 } else if (field.getAnnotation(Children.class) != null) {
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108 checkChildrenField(field);
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109 nodeField = NodeFieldAccessor.create(NodeFieldKind.CHILDREN, field);
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110 childrenFieldList.add(nodeField);
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111 } else {
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112 nodeField = NodeFieldAccessor.create(NodeFieldKind.DATA, field);
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113 if (NodeCloneable.class.isAssignableFrom(field.getType())) {
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114 cloneableFieldList.add(nodeField);
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115 }
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116 }
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117 fieldsList.add(nodeField);
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118 }
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119 }
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120
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121 @Override
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122 public NodeFieldAccessor getNodeClassField() {
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123 return nodeClassField;
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124 }
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125
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126 @Override
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127 public NodeFieldAccessor[] getCloneableFields() {
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128 return cloneableFields;
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129 }
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130
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131 private static boolean isNodeType(Class<?> clazz) {
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132 return Node.class.isAssignableFrom(clazz) || (clazz.isInterface() && NodeInterface.class.isAssignableFrom(clazz));
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133 }
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134
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135 private static void checkChildField(Field field) {
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136 if (!isNodeType(field.getType())) {
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137 throw new AssertionError("@Child field type must be a subclass of Node or an interface extending NodeInterface (" + field + ")");
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138 }
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diff changeset
139 if (Modifier.isFinal(field.getModifiers())) {
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140 throw new AssertionError("@Child field must not be final (" + field + ")");
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141 }
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Christian Humer <christian.humer@gmail.com>
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142 }
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Christian Humer <christian.humer@gmail.com>
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143
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144 private static void checkChildrenField(Field field) {
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145 if (!(field.getType().isArray() && isNodeType(field.getType().getComponentType()))) {
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146 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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147 }
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148 if (!Modifier.isFinal(field.getModifiers())) {
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149 throw new AssertionError("@Children field must be final (" + field + ")");
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150 }
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Christian Humer <christian.humer@gmail.com>
parents:
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151 }
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152
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153 @Override
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154 public NodeFieldAccessor[] getFields() {
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155 return fields;
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156 }
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157
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158 @Override
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159 public NodeFieldAccessor getParentField() {
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160 return parentField;
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161 }
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162
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163 @Override
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164 public NodeFieldAccessor[] getChildFields() {
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165 return childFields;
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diff changeset
166 }
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167
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168 @Override
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169 public NodeFieldAccessor[] getChildrenFields() {
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170 return childrenFields;
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171 }
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diff changeset
172
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diff changeset
173 @Override
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diff changeset
174 public int hashCode() {
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diff changeset
175 return clazz.hashCode();
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176 }
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diff changeset
177
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diff changeset
178 @Override
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diff changeset
179 public boolean equals(Object obj) {
22399
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180 if (obj instanceof NodeClassImpl) {
efbc311e9ff2 Turning NodeClass into abstract class to allow its independent implementations.
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diff changeset
181 NodeClassImpl other = (NodeClassImpl) obj;
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182 return clazz.equals(other.clazz);
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183 }
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diff changeset
184 return false;
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diff changeset
185 }
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diff changeset
186
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diff changeset
187 @Override
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188 public Iterator<Node> makeIterator(Node node) {
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189 assert clazz.isInstance(node);
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diff changeset
190 return new NodeIterator(this, node);
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191 }
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parents: 22368
diff changeset
192
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diff changeset
193 private static final class NodeIterator implements Iterator<Node> {
20129
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194 private final NodeFieldAccessor[] childFields;
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Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
195 private final NodeFieldAccessor[] childrenFields;
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Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
196 private final Node node;
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Christian Humer <christian.humer@gmail.com>
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197 private final int childrenCount;
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Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
198 private int index;
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diff changeset
199
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diff changeset
200 protected NodeIterator(NodeClassImpl nodeClass, Node node) {
20129
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parents:
diff changeset
201 this.childFields = nodeClass.getChildFields();
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
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parents:
diff changeset
202 this.childrenFields = nodeClass.getChildrenFields();
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parents:
diff changeset
203 this.node = node;
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
204 this.childrenCount = childrenCount();
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
205 this.index = 0;
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
206 }
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
207
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
208 private int childrenCount() {
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Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
209 int nodeCount = childFields.length;
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
210 for (NodeFieldAccessor childrenField : childrenFields) {
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
211 Object[] children = ((Object[]) childrenField.getObject(node));
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
212 if (children != null) {
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
213 nodeCount += children.length;
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
214 }
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
215 }
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
216 return nodeCount;
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
217 }
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 private Node nodeAt(int idx) {
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
220 int nodeCount = childFields.length;
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
221 if (idx < nodeCount) {
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
222 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
223 } else {
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
224 for (NodeFieldAccessor childrenField : childrenFields) {
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
225 Object[] nodeArray = (Object[]) childrenField.getObject(node);
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
226 if (idx < nodeCount + nodeArray.length) {
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
227 return (Node) nodeArray[idx - nodeCount];
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
228 }
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
229 nodeCount += nodeArray.length;
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
230 }
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 return null;
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
233 }
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 private void forward() {
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
236 if (index < childrenCount) {
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
237 index++;
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
238 }
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 public boolean hasNext() {
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
242 return index < childrenCount;
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
243 }
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 public Node next() {
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
246 try {
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
247 return nodeAt(index);
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
248 } finally {
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
249 forward();
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
250 }
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 public void remove() {
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
254 throw new UnsupportedOperationException();
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
255 }
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 }