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annotate truffle/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/NodeClass.java @ 22368:0d4b0e4263ee

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Convert NodeClass and NodeFieldAccessor to interfaces
author Christian Wimmer <christian.wimmer@oracle.com>
date Fri, 13 Nov 2015 10:29:52 -0800
parents 4df3d8fd6cfd
children 6598b9b7aafd
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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.security.AccessController;
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30 import java.security.PrivilegedAction;
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31 import java.util.ArrayList;
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32 import java.util.Iterator;
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33 import java.util.List;
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34
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35 import com.oracle.truffle.api.nodes.Node.Child;
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36 import com.oracle.truffle.api.nodes.Node.Children;
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37 import com.oracle.truffle.api.nodes.NodeFieldAccessor.NodeFieldAccessorImpl;
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38 import com.oracle.truffle.api.nodes.NodeFieldAccessor.NodeFieldKind;
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39
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40 public interface NodeClass {
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41
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42 public static class Lookup {
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43 public static NodeClass get(Class<? extends Node> clazz) {
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44 return NodeClassImpl.nodeClasses.get(clazz);
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45 }
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46
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47 public static NodeClass get(Node node) {
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48 return node.getNodeClass();
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49 }
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50 }
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51
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52 NodeFieldAccessor getNodeClassField();
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53
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54 NodeFieldAccessor[] getCloneableFields();
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55
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56 NodeFieldAccessor[] getFields();
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57
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58 NodeFieldAccessor getParentField();
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59
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60 NodeFieldAccessor[] getChildFields();
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61
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62 NodeFieldAccessor[] getChildrenFields();
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63
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64 Iterator<Node> makeIterator(Node node);
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65
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66 /**
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67 * Information about a {@link Node} class. A single instance of this class is allocated for
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68 * every subclass of {@link Node} that is used.
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69 */
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70 public final class NodeClassImpl implements NodeClass {
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71 static final ClassValue<NodeClass> nodeClasses = new ClassValue<NodeClass>() {
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72 @SuppressWarnings("unchecked")
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73 @Override
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74 protected NodeClass computeValue(final Class<?> clazz) {
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75 assert Node.class.isAssignableFrom(clazz);
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76 return AccessController.doPrivileged(new PrivilegedAction<NodeClass>() {
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77 public NodeClass run() {
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78 return new NodeClassImpl((Class<? extends Node>) clazz);
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79 }
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80 });
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81 }
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82 };
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83
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84 private static final NodeFieldAccessor[] EMPTY_NODE_FIELD_ARRAY = new NodeFieldAccessor[0];
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85
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86 // The comprehensive list of all fields.
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87 private final NodeFieldAccessor[] fields;
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88 // Separate arrays for the frequently accessed fields.
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89 private final NodeFieldAccessor parentField;
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90 private final NodeFieldAccessor nodeClassField;
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91 private final NodeFieldAccessor[] childFields;
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92 private final NodeFieldAccessor[] childrenFields;
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93 private final NodeFieldAccessor[] cloneableFields;
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94
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95 private final Class<? extends Node> clazz;
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96
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97 public static NodeClass get(Class<? extends Node> clazz) {
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98 return nodeClasses.get(clazz);
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99 }
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100
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101 public static NodeClass get(Node node) {
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102 return node.getNodeClass();
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103 }
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104
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105 NodeClassImpl(Class<? extends Node> clazz) {
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106 List<NodeFieldAccessor> fieldsList = new ArrayList<>();
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107 NodeFieldAccessor parentFieldTmp = null;
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108 NodeFieldAccessor nodeClassFieldTmp = null;
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109 List<NodeFieldAccessor> childFieldList = new ArrayList<>();
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110 List<NodeFieldAccessor> childrenFieldList = new ArrayList<>();
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111 List<NodeFieldAccessor> cloneableFieldList = new ArrayList<>();
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112
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113 for (Field field : NodeUtil.getAllFields(clazz)) {
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114 if (Modifier.isStatic(field.getModifiers()) || field.isSynthetic()) {
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115 continue;
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116 }
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117
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118 NodeFieldAccessor nodeField;
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119 if (field.getDeclaringClass() == Node.class && field.getName().equals("parent")) {
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120 assert Node.class.isAssignableFrom(field.getType());
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121 nodeField = NodeFieldAccessorImpl.create(NodeFieldKind.PARENT, field);
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122 parentFieldTmp = nodeField;
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123 } else if (field.getDeclaringClass() == Node.class && field.getName().equals("nodeClass")) {
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124 assert NodeClass.class.isAssignableFrom(field.getType());
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125 nodeField = NodeFieldAccessorImpl.create(NodeFieldKind.NODE_CLASS, field);
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126 nodeClassFieldTmp = nodeField;
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127 } else if (field.getAnnotation(Child.class) != null) {
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128 checkChildField(field);
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129 nodeField = NodeFieldAccessorImpl.create(NodeFieldKind.CHILD, field);
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130 childFieldList.add(nodeField);
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131 } else if (field.getAnnotation(Children.class) != null) {
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132 checkChildrenField(field);
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133 nodeField = NodeFieldAccessorImpl.create(NodeFieldKind.CHILDREN, field);
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134 childrenFieldList.add(nodeField);
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135 } else {
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136 nodeField = NodeFieldAccessorImpl.create(NodeFieldKind.DATA, field);
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diff changeset
137 if (NodeCloneable.class.isAssignableFrom(field.getType())) {
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138 cloneableFieldList.add(nodeField);
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139 }
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140 }
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diff changeset
141 fieldsList.add(nodeField);
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142 }
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143
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diff changeset
144 if (parentFieldTmp == null) {
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145 throw new AssertionError("parent field not found");
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diff changeset
146 }
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147
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148 this.fields = fieldsList.toArray(EMPTY_NODE_FIELD_ARRAY);
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149 this.nodeClassField = nodeClassFieldTmp;
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diff changeset
150 this.parentField = parentFieldTmp;
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diff changeset
151 this.childFields = childFieldList.toArray(EMPTY_NODE_FIELD_ARRAY);
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152 this.childrenFields = childrenFieldList.toArray(EMPTY_NODE_FIELD_ARRAY);
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diff changeset
153 this.cloneableFields = cloneableFieldList.toArray(EMPTY_NODE_FIELD_ARRAY);
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diff changeset
154 this.clazz = clazz;
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155 }
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156
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157 public Class<? extends Node> getNodeClass() {
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158 return clazz;
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159 }
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160
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diff changeset
161 public NodeFieldAccessor getNodeClassField() {
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162 return nodeClassField;
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diff changeset
163 }
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164
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diff changeset
165 public NodeFieldAccessor[] getCloneableFields() {
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166 return cloneableFields;
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diff changeset
167 }
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168
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diff changeset
169 private static boolean isNodeType(Class<?> clazz) {
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170 return Node.class.isAssignableFrom(clazz) || (clazz.isInterface() && NodeInterface.class.isAssignableFrom(clazz));
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171 }
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172
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173 private static void checkChildField(Field field) {
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diff changeset
174 if (!isNodeType(field.getType())) {
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175 throw new AssertionError("@Child field type must be a subclass of Node or an interface extending NodeInterface (" + field + ")");
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176 }
0d4b0e4263ee Convert NodeClass and NodeFieldAccessor to interfaces
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diff changeset
177 if (Modifier.isFinal(field.getModifiers())) {
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diff changeset
178 throw new AssertionError("@Child field must not be final (" + field + ")");
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179 }
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diff changeset
180 }
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diff changeset
181
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diff changeset
182 private static void checkChildrenField(Field field) {
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parents: 22341
diff changeset
183 if (!(field.getType().isArray() && isNodeType(field.getType().getComponentType()))) {
0d4b0e4263ee Convert NodeClass and NodeFieldAccessor to interfaces
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parents: 22341
diff changeset
184 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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185 }
0d4b0e4263ee Convert NodeClass and NodeFieldAccessor to interfaces
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parents: 22341
diff changeset
186 if (!Modifier.isFinal(field.getModifiers())) {
0d4b0e4263ee Convert NodeClass and NodeFieldAccessor to interfaces
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parents: 22341
diff changeset
187 throw new AssertionError("@Children field must be final (" + field + ")");
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188 }
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diff changeset
189 }
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diff changeset
190
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parents: 22341
diff changeset
191 public NodeFieldAccessor[] getFields() {
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diff changeset
192 return fields;
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diff changeset
193 }
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diff changeset
194
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parents: 22341
diff changeset
195 public NodeFieldAccessor getParentField() {
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diff changeset
196 return parentField;
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diff changeset
197 }
0d4b0e4263ee Convert NodeClass and NodeFieldAccessor to interfaces
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parents: 22341
diff changeset
198
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diff changeset
199 public NodeFieldAccessor[] getChildFields() {
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parents: 22341
diff changeset
200 return childFields;
0d4b0e4263ee Convert NodeClass and NodeFieldAccessor to interfaces
Christian Wimmer <christian.wimmer@oracle.com>
parents: 22341
diff changeset
201 }
0d4b0e4263ee Convert NodeClass and NodeFieldAccessor to interfaces
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parents: 22341
diff changeset
202
0d4b0e4263ee Convert NodeClass and NodeFieldAccessor to interfaces
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parents: 22341
diff changeset
203 public NodeFieldAccessor[] getChildrenFields() {
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parents: 22341
diff changeset
204 return childrenFields;
0d4b0e4263ee Convert NodeClass and NodeFieldAccessor to interfaces
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parents: 22341
diff changeset
205 }
0d4b0e4263ee Convert NodeClass and NodeFieldAccessor to interfaces
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parents: 22341
diff changeset
206
0d4b0e4263ee Convert NodeClass and NodeFieldAccessor to interfaces
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parents: 22341
diff changeset
207 @Override
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parents: 22341
diff changeset
208 public int hashCode() {
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Christian Wimmer <christian.wimmer@oracle.com>
parents: 22341
diff changeset
209 return clazz.hashCode();
0d4b0e4263ee Convert NodeClass and NodeFieldAccessor to interfaces
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parents: 22341
diff changeset
210 }
0d4b0e4263ee Convert NodeClass and NodeFieldAccessor to interfaces
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parents: 22341
diff changeset
211
0d4b0e4263ee Convert NodeClass and NodeFieldAccessor to interfaces
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parents: 22341
diff changeset
212 @Override
0d4b0e4263ee Convert NodeClass and NodeFieldAccessor to interfaces
Christian Wimmer <christian.wimmer@oracle.com>
parents: 22341
diff changeset
213 public boolean equals(Object obj) {
0d4b0e4263ee Convert NodeClass and NodeFieldAccessor to interfaces
Christian Wimmer <christian.wimmer@oracle.com>
parents: 22341
diff changeset
214 if (obj instanceof NodeClassImpl) {
0d4b0e4263ee Convert NodeClass and NodeFieldAccessor to interfaces
Christian Wimmer <christian.wimmer@oracle.com>
parents: 22341
diff changeset
215 NodeClassImpl other = (NodeClassImpl) obj;
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parents: 22341
diff changeset
216 return clazz.equals(other.clazz);
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parents: 22341
diff changeset
217 }
0d4b0e4263ee Convert NodeClass and NodeFieldAccessor to interfaces
Christian Wimmer <christian.wimmer@oracle.com>
parents: 22341
diff changeset
218 return false;
0d4b0e4263ee Convert NodeClass and NodeFieldAccessor to interfaces
Christian Wimmer <christian.wimmer@oracle.com>
parents: 22341
diff changeset
219 }
0d4b0e4263ee Convert NodeClass and NodeFieldAccessor to interfaces
Christian Wimmer <christian.wimmer@oracle.com>
parents: 22341
diff changeset
220
0d4b0e4263ee Convert NodeClass and NodeFieldAccessor to interfaces
Christian Wimmer <christian.wimmer@oracle.com>
parents: 22341
diff changeset
221 public Iterator<Node> makeIterator(Node node) {
0d4b0e4263ee Convert NodeClass and NodeFieldAccessor to interfaces
Christian Wimmer <christian.wimmer@oracle.com>
parents: 22341
diff changeset
222 assert clazz.isInstance(node);
0d4b0e4263ee Convert NodeClass and NodeFieldAccessor to interfaces
Christian Wimmer <christian.wimmer@oracle.com>
parents: 22341
diff changeset
223 return new NodeIterator(this, node);
20129
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
224 }
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
225 }
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
226
22368
0d4b0e4263ee Convert NodeClass and NodeFieldAccessor to interfaces
Christian Wimmer <christian.wimmer@oracle.com>
parents: 22341
diff changeset
227 public static final class NodeIterator implements Iterator<Node> {
20129
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
228 private final NodeFieldAccessor[] childFields;
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
229 private final NodeFieldAccessor[] childrenFields;
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
230 private final Node node;
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
231 private final int childrenCount;
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
232 private int index;
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
233
22368
0d4b0e4263ee Convert NodeClass and NodeFieldAccessor to interfaces
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parents: 22341
diff changeset
234 public NodeIterator(NodeClass nodeClass, Node node) {
20129
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
235 this.childFields = nodeClass.getChildFields();
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
236 this.childrenFields = nodeClass.getChildrenFields();
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
237 this.node = node;
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
238 this.childrenCount = childrenCount();
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
239 this.index = 0;
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 private int childrenCount() {
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
243 int nodeCount = childFields.length;
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
244 for (NodeFieldAccessor childrenField : childrenFields) {
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
245 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
246 if (children != null) {
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
247 nodeCount += children.length;
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
248 }
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
249 }
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
250 return nodeCount;
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 private Node nodeAt(int idx) {
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
254 int nodeCount = childFields.length;
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
255 if (idx < nodeCount) {
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
256 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
257 } else {
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
258 for (NodeFieldAccessor childrenField : childrenFields) {
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
259 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
260 if (idx < nodeCount + nodeArray.length) {
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
261 return (Node) nodeArray[idx - nodeCount];
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
262 }
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
263 nodeCount += nodeArray.length;
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
264 }
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
265 }
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
266 return null;
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
267 }
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
268
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
269 private void forward() {
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
270 if (index < childrenCount) {
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
271 index++;
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
272 }
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
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273 }
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274
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275 public boolean hasNext() {
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276 return index < childrenCount;
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277 }
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278
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279 public Node next() {
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280 try {
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281 return nodeAt(index);
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282 } finally {
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283 forward();
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284 }
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285 }
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286
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287 public void remove() {
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288 throw new UnsupportedOperationException();
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289 }
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290 }
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291 }