| /* |
| * Copyright (c) 2015, 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. |
| * |
| * 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 org.graalvm.compiler.graph; |
| |
| import java.util.Map; |
| import java.util.function.Consumer; |
| |
| /** |
| * This class is a container of a graph that needs to be readonly and optionally a lazily created |
| * mutable copy of the graph. |
| */ |
| public final class CachedGraph<G extends Graph> { |
| |
| private final G readonlyCopy; |
| private G mutableCopy; |
| |
| private CachedGraph(G readonlyCopy, G mutableCopy) { |
| this.readonlyCopy = readonlyCopy; |
| this.mutableCopy = mutableCopy; |
| } |
| |
| public static <G extends Graph> CachedGraph<G> fromReadonlyCopy(G graph) { |
| return new CachedGraph<>(graph, null); |
| } |
| |
| public static <G extends Graph> CachedGraph<G> fromMutableCopy(G graph) { |
| return new CachedGraph<>(graph, graph); |
| } |
| |
| public G getReadonlyCopy() { |
| if (hasMutableCopy()) { |
| return mutableCopy; |
| } |
| return readonlyCopy; |
| } |
| |
| public boolean hasMutableCopy() { |
| return mutableCopy != null; |
| } |
| |
| @SuppressWarnings("unchecked") |
| public G getMutableCopy(Consumer<Map<Node, Node>> duplicationMapCallback) { |
| if (!hasMutableCopy()) { |
| mutableCopy = (G) readonlyCopy.copy(duplicationMapCallback); |
| } |
| return mutableCopy; |
| } |
| } |
