| /* |
| * Copyright (c) 2005, 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.sun.xml.internal.stream.util; |
| |
| import java.lang.ref.*; |
| |
| /** |
| * This is a Singleton class that allows you to allocate buffer that |
| * are stored in ThreadLocal. This class stores 3 types of char |
| * buffers - small (< 128 bytes), medium (<2K) and large (> 2K) as |
| * well as three byte buffers - small, medium and large. |
| * The local storage is activated on the return of the buffer. |
| * The buffer returns null if it is already allocated. |
| * |
| * @author Binu.John@sun.com |
| * @author Santiago.PericasGeertsen@sun.com |
| */ |
| public class ThreadLocalBufferAllocator { |
| private static ThreadLocal<SoftReference> tlba = new ThreadLocal<>(); |
| |
| public static BufferAllocator getBufferAllocator() { |
| SoftReference<BufferAllocator> bAllocatorRef = tlba.get(); |
| if (bAllocatorRef == null || bAllocatorRef.get() == null) { |
| bAllocatorRef = new SoftReference(new BufferAllocator()); |
| tlba.set(bAllocatorRef); |
| } |
| |
| return bAllocatorRef.get(); |
| } |
| } |