--- a/src/jdk.jfr/share/classes/jdk/jfr/consumer/ConstantMap.java Fri Sep 13 18:46:07 2019 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,191 +0,0 @@
-/*
- * Copyright (c) 2016, 2019, 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 jdk.jfr.consumer;
-
-import jdk.jfr.internal.LongMap;
-
-/**
- * Holds mapping between a set of keys and their corresponding object.
- *
- * If the type is a known type, i.e. {@link RecordedThread}, an
- * {@link ObjectFactory} can be supplied which will instantiate a typed object.
- */
-final class ConstantMap {
-
- private static final int RESOLUTION_FINISHED = 0;
- private static final int RESOLUTION_STARTED = 1;
- public static final ConstantMap EMPTY = new ConstantMap();
-
- // A temporary placeholder, so objects can
- // reference themselves (directly, or indirectly),
- // when making a transition from numeric id references
- // to normal Java references.
- private final static class Reference {
- private final long key;
- private final ConstantMap pool;
-
- Reference(ConstantMap pool, long key) {
- this.pool = pool;
- this.key = key;
- }
-
- Object resolve() {
- return pool.get(key);
- }
-
- public String toString() {
- return "ref: " + pool.name + "[" + key + "]";
- }
- }
-
- final ObjectFactory<?> factory;
- final String name;
-
- private final LongMap<Object> objects;
-
- private boolean resolving;
- private boolean allResolved;
-
- private ConstantMap() {
- this(null, "<empty>");
- allResolved = true;
- }
-
- ConstantMap(ObjectFactory<?> factory, String name) {
- this.name = name;
- this.objects = new LongMap<>(2);
- this.factory = factory;
- }
-
- Object get(long id) {
- // fast path, all objects in pool resolved
- if (allResolved) {
- return objects.get(id);
- }
- // referenced from a pool, deal with this later
- if (!resolving) {
- return new Reference(this, id);
- }
-
- // should always have a value
- Object value = objects.get(id);
- if (value == null) {
- // unless is 0 which is used to represent null
- if (id == 0) {
- return null;
- }
- throw new InternalError("Missing object id=" + id + " in pool " + name + ". All ids should reference object");
- }
-
- // id is resolved (but not the whole pool)
- if (objects.isSetId(id, RESOLUTION_FINISHED)) {
- return value;
- }
-
- // resolving ourself, abort to avoid infinite recursion
- if (objects.isSetId(id, RESOLUTION_STARTED)) {
- return null;
- }
-
- // mark id as STARTED if we should
- // come back during object resolution
- objects.setId(id, RESOLUTION_STARTED);
-
- // resolve object!
- Object resolved = resolve(value);
-
- // mark id as FINISHED
- objects.setId(id, RESOLUTION_FINISHED);
-
- // if a factory exists, convert to RecordedThread.
- // RecordedClass etc. and store back results
- if (factory != null) {
- Object factorized = factory.createObject(id, resolved);
- objects.put(id, factorized);
- return factorized;
- } else {
- objects.put(id, resolved);
- return resolved;
- }
- }
-
- private static Object resolve(Object o) {
- if (o instanceof Reference) {
- return resolve(((Reference) o).resolve());
- }
- if (o != null && o.getClass().isArray()) {
- final Object[] array = (Object[]) o;
- for (int i = 0; i < array.length; i++) {
- Object element = array[i];
- array[i] = resolve(element);
- }
- return array;
- }
- return o;
- }
-
- public void resolve() {
- objects.forEachKey(k -> get(k));
- }
-
- public void put(long key, Object value) {
- objects.put(key, value);
- }
-
- public void setResolving() {
- resolving = true;
- allResolved = false;
- }
-
- public void setResolved() {
- allResolved = true;
- resolving = false;
- }
-
- public String getName() {
- return name;
- }
-
- public Object getResolved(long id) {
- return objects.get(id);
- }
-
- public void putResolved(long id, Object object) {
- objects.put(id, object);
- objects.setId(id, RESOLUTION_FINISHED);
- }
-
- public void setAllResolved(boolean allResolved) {
- this.allResolved = allResolved;
- }
-
- public boolean isResolved(long id) {
- if (objects.hasKey(id)) {
- return objects.isSetId(id, RESOLUTION_FINISHED);
- }
- return false;
- }
-}