| /******************************************************************************* |
| * Copyright (c) 2000, 2013 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.aspectj.org.eclipse.jdt.internal.core; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.aspectj.org.eclipse.jdt.core.IBuffer; |
| import org.aspectj.org.eclipse.jdt.internal.core.util.LRUCache; |
| |
| /** |
| * An LRU cache of <code>IBuffers</code>. |
| */ |
| public class BufferCache<K> extends OverflowingLRUCache<K, IBuffer> { |
| |
| private ThreadLocal<List<IBuffer>> buffersToClose = new ThreadLocal<>(); |
| |
| /** |
| * Constructs a new buffer cache of the given size. |
| */ |
| public BufferCache(int size) { |
| super(size); |
| } |
| /** |
| * Constructs a new buffer cache of the given size. |
| */ |
| public BufferCache(int size, int overflow) { |
| super(size, overflow); |
| } |
| |
| @Override |
| protected boolean close(LRUCacheEntry<K, IBuffer> entry) { |
| IBuffer buffer= entry.value; |
| |
| // prevent buffer that have unsaved changes or working copy buffer to be removed |
| // see https://bugs.eclipse.org/bugs/show_bug.cgi?id=39311 |
| if (!((Openable)buffer.getOwner()).canBufferBeRemovedFromCache(buffer)) { |
| return false; |
| } else { |
| List<IBuffer> buffers = this.buffersToClose.get(); |
| if (buffers == null) { |
| buffers = new ArrayList<>(); |
| this.buffersToClose.set(buffers); |
| } |
| buffers.add(buffer); |
| return true; |
| } |
| } |
| |
| void closeBuffers() { |
| List<IBuffer> buffers = this.buffersToClose.get(); |
| if (buffers == null) |
| return; |
| this.buffersToClose.set(null); |
| for (int i = 0, length = buffers.size(); i < length; i++) { |
| buffers.get(i).close(); |
| } |
| } |
| |
| @Override |
| protected LRUCache<K, IBuffer> newInstance(int size, int newOverflow) { |
| return new BufferCache<>(size, newOverflow); |
| } |
| } |