Mercurial > hg > graal-compiler
view graal/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/NodeClass.java @ 21554:b1530a6cce8c
renamed com.oracle.graal.[debug|options|hotspotvmconfig]* modules to com.oracle.jvmci.[debug|options|hotspotvmconfig]* modules (JBS:GRAAL-53)
author | Doug Simon <doug.simon@oracle.com> |
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date | Tue, 26 May 2015 23:21:15 +0200 |
parents | 8dc73c226c63 |
children |
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/* * Copyright (c) 2012, 2015, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.oracle.truffle.api.nodes; import java.lang.reflect.*; import java.security.*; import java.util.*; import com.oracle.truffle.api.nodes.Node.Child; import com.oracle.truffle.api.nodes.Node.Children; import com.oracle.truffle.api.nodes.NodeFieldAccessor.NodeFieldKind; /** * Information about a {@link Node} class. A single instance of this class is allocated for every * subclass of {@link Node} that is used. */ public final class NodeClass { private static final ClassValue<NodeClass> nodeClasses = new ClassValue<NodeClass>() { @SuppressWarnings("unchecked") @Override protected NodeClass computeValue(final Class<?> clazz) { assert Node.class.isAssignableFrom(clazz); return AccessController.doPrivileged(new PrivilegedAction<NodeClass>() { public NodeClass run() { return new NodeClass((Class<? extends Node>) clazz); } }); } }; // The comprehensive list of all fields. private final NodeFieldAccessor[] fields; // Separate arrays for the frequently accessed fields. private final NodeFieldAccessor parentField; private final NodeFieldAccessor nodeClassField; private final NodeFieldAccessor[] childFields; private final NodeFieldAccessor[] childrenFields; private final NodeFieldAccessor[] cloneableFields; private final Class<? extends Node> clazz; public static NodeClass get(Class<? extends Node> clazz) { return nodeClasses.get(clazz); } public static NodeClass get(Node clazz) { return clazz.getNodeClass(); } public NodeClass(Class<? extends Node> clazz) { List<NodeFieldAccessor> fieldsList = new ArrayList<>(); NodeFieldAccessor parentFieldTmp = null; NodeFieldAccessor nodeClassFieldTmp = null; List<NodeFieldAccessor> childFieldList = new ArrayList<>(); List<NodeFieldAccessor> childrenFieldList = new ArrayList<>(); List<NodeFieldAccessor> cloneableFieldList = new ArrayList<>(); for (Field field : NodeUtil.getAllFields(clazz)) { if (Modifier.isStatic(field.getModifiers()) || field.isSynthetic()) { continue; } NodeFieldAccessor nodeField; if (field.getDeclaringClass() == Node.class && field.getName().equals("parent")) { assert Node.class.isAssignableFrom(field.getType()); nodeField = NodeFieldAccessor.create(NodeFieldKind.PARENT, field); parentFieldTmp = nodeField; } else if (field.getDeclaringClass() == Node.class && field.getName().equals("nodeClass")) { assert NodeClass.class.isAssignableFrom(field.getType()); nodeField = NodeFieldAccessor.create(NodeFieldKind.NODE_CLASS, field); nodeClassFieldTmp = nodeField; } else if (field.getAnnotation(Child.class) != null) { checkChildField(field); nodeField = NodeFieldAccessor.create(NodeFieldKind.CHILD, field); childFieldList.add(nodeField); } else if (field.getAnnotation(Children.class) != null) { checkChildrenField(field); nodeField = NodeFieldAccessor.create(NodeFieldKind.CHILDREN, field); childrenFieldList.add(nodeField); } else { nodeField = NodeFieldAccessor.create(NodeFieldKind.DATA, field); if (NodeCloneable.class.isAssignableFrom(field.getType())) { cloneableFieldList.add(nodeField); } } fieldsList.add(nodeField); } if (parentFieldTmp == null) { throw new AssertionError("parent field not found"); } this.fields = fieldsList.toArray(new NodeFieldAccessor[fieldsList.size()]); this.nodeClassField = nodeClassFieldTmp; this.parentField = parentFieldTmp; this.childFields = childFieldList.toArray(new NodeFieldAccessor[childFieldList.size()]); this.childrenFields = childrenFieldList.toArray(new NodeFieldAccessor[childrenFieldList.size()]); this.cloneableFields = cloneableFieldList.toArray(new NodeFieldAccessor[cloneableFieldList.size()]); this.clazz = clazz; } public NodeFieldAccessor getNodeClassField() { return nodeClassField; } public NodeFieldAccessor[] getCloneableFields() { return cloneableFields; } private static boolean isNodeType(Class<?> clazz) { return Node.class.isAssignableFrom(clazz) || (clazz.isInterface() && NodeInterface.class.isAssignableFrom(clazz)); } private static void checkChildField(Field field) { if (!isNodeType(field.getType())) { throw new AssertionError("@Child field type must be a subclass of Node or an interface extending NodeInterface (" + field + ")"); } if (Modifier.isFinal(field.getModifiers())) { throw new AssertionError("@Child field must not be final (" + field + ")"); } } private static void checkChildrenField(Field field) { if (!(field.getType().isArray() && isNodeType(field.getType().getComponentType()))) { throw new AssertionError("@Children field type must be an array of a subclass of Node or an interface extending NodeInterface (" + field + ")"); } if (!Modifier.isFinal(field.getModifiers())) { throw new AssertionError("@Children field must be final (" + field + ")"); } } public NodeFieldAccessor[] getFields() { return fields; } public NodeFieldAccessor getParentField() { return parentField; } public NodeFieldAccessor[] getChildFields() { return childFields; } public NodeFieldAccessor[] getChildrenFields() { return childrenFields; } @Override public int hashCode() { return clazz.hashCode(); } @Override public boolean equals(Object obj) { if (obj instanceof NodeClass) { NodeClass other = (NodeClass) obj; return clazz.equals(other.clazz); } return false; } public Iterator<Node> makeIterator(Node node) { assert clazz.isInstance(node); return new NodeIterator(this, node); } private static final class NodeIterator implements Iterator<Node> { private final NodeFieldAccessor[] childFields; private final NodeFieldAccessor[] childrenFields; private final Node node; private final int childrenCount; private int index; protected NodeIterator(NodeClass nodeClass, Node node) { this.childFields = nodeClass.getChildFields(); this.childrenFields = nodeClass.getChildrenFields(); this.node = node; this.childrenCount = childrenCount(); this.index = 0; } private int childrenCount() { int nodeCount = childFields.length; for (NodeFieldAccessor childrenField : childrenFields) { Object[] children = ((Object[]) childrenField.getObject(node)); if (children != null) { nodeCount += children.length; } } return nodeCount; } private Node nodeAt(int idx) { int nodeCount = childFields.length; if (idx < nodeCount) { return (Node) childFields[idx].getObject(node); } else { for (NodeFieldAccessor childrenField : childrenFields) { Object[] nodeArray = (Object[]) childrenField.getObject(node); if (idx < nodeCount + nodeArray.length) { return (Node) nodeArray[idx - nodeCount]; } nodeCount += nodeArray.length; } } return null; } private void forward() { if (index < childrenCount) { index++; } } public boolean hasNext() { return index < childrenCount; } public Node next() { try { return nodeAt(index); } finally { forward(); } } public void remove() { throw new UnsupportedOperationException(); } } }