Mercurial > hg > release > icedtea7-forest-2.0 > jaxp
view sources/jaxp_src/src/com/sun/xml/internal/stream/util/BufferAllocator.java @ 273:0f39aee48121
6955301: Update names and references to rebranded drop bundles (jaxp, jaxws, jaf)
author | andrew |
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date | Wed, 28 Sep 2011 17:02:12 +0100 |
parents | 32e511cf3502 |
children |
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/* * 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.*; /** * Buffer allocator for buffers of sizes 128 B, 2 KB and 8 KB. Includes * methods for allocating and freeing buffers. * * @author Binu.John@sun.com * @author Santiago.PericasGeertsen@sun.com */ public class BufferAllocator { public static int SMALL_SIZE_LIMIT = 128; public static int MEDIUM_SIZE_LIMIT = 2048; public static int LARGE_SIZE_LIMIT = 8192; char[] smallCharBuffer; char[] mediumCharBuffer; char[] largeCharBuffer; byte[] smallByteBuffer; byte[] mediumByteBuffer; byte[] largeByteBuffer; public BufferAllocator() { } public char[] getCharBuffer(int size) { if (size <= SMALL_SIZE_LIMIT) { char[] buffer = smallCharBuffer; smallCharBuffer = null; return buffer; } else if (size <= MEDIUM_SIZE_LIMIT) { char[] buffer = mediumCharBuffer; mediumCharBuffer = null; return buffer; } else if (size <= LARGE_SIZE_LIMIT) { char[] buffer = largeCharBuffer; largeCharBuffer = null; return buffer; } return null; } public void returnCharBuffer(char[] c) { if (c == null) { return; } if (c.length <= SMALL_SIZE_LIMIT) { smallCharBuffer = c; } else if (c.length <= MEDIUM_SIZE_LIMIT) { mediumCharBuffer = c; } else if (c.length <= LARGE_SIZE_LIMIT) { largeCharBuffer = c; } } public byte[] getByteBuffer(int size) { if (size <= SMALL_SIZE_LIMIT) { byte[] buffer = smallByteBuffer; smallByteBuffer = null; return buffer; } else if (size <= MEDIUM_SIZE_LIMIT) { byte[] buffer = mediumByteBuffer; mediumByteBuffer = null; return buffer; } else if (size <= LARGE_SIZE_LIMIT) { byte[] buffer = largeByteBuffer; largeByteBuffer = null; return buffer; } return null; } public void returnByteBuffer(byte[] b) { if (b == null) { return; } if (b.length <= SMALL_SIZE_LIMIT) { smallByteBuffer = b; } else if (b.length <= MEDIUM_SIZE_LIMIT) { mediumByteBuffer = b; } else if (b.length <= LARGE_SIZE_LIMIT) { largeByteBuffer = b; } } }