--- a/src/jdk.jfr/share/classes/jdk/jfr/consumer/ConstantMap.java Wed Oct 30 16:14:56 2019 +0100
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,139 +0,0 @@
-/*
- * Copyright (c) 2016, 2018, 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 java.util.ArrayList;
-import java.util.List;
-
-/**
- * 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 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);
- }
- }
-
- private final ObjectFactory<?> factory;
- private final LongMap<Object> objects;
-
- private LongMap<Boolean> isResolving;
- private boolean allResolved;
- private String name;
-
- ConstantMap(ObjectFactory<?> factory, String name) {
- this.name = name;
- this.objects = new LongMap<>();
- 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 (isResolving == null) {
- return new Reference(this, id);
- }
-
- Boolean beingResolved = isResolving.get(id);
-
- // we are resolved (but not the whole pool)
- if (Boolean.FALSE.equals(beingResolved)) {
- return objects.get(id);
- }
-
- // resolving ourself, abort to avoid infinite recursion
- if (Boolean.TRUE.equals(beingResolved)) {
- return null;
- }
-
- // resolve me!
- isResolving.put(id, Boolean.TRUE);
- Object resolved = resolve(objects.get(id));
- isResolving.put(id, Boolean.FALSE);
- 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++) {
- array[i] = resolve(array[i]);
- }
- return array;
- }
- return o;
- }
-
- public void resolve() {
- List<Long> keyList = new ArrayList<>();
- objects.keys().forEachRemaining(keyList::add);
- for (Long l : keyList) {
- get(l);
- }
- }
-
- public void put(long key, Object value) {
- objects.put(key, value);
- }
-
- public void setIsResolving() {
- isResolving = new LongMap<>();
- }
-
- public void setResolved() {
- allResolved = true;
- isResolving = null; // pool finished, release memory
- }
-
- public String getName() {
- return name;
- }
-}