001: /*
002: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
003: *
004: * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
005: *
006: * The contents of this file are subject to the terms of either the GNU
007: * General Public License Version 2 only ("GPL") or the Common Development
008: * and Distribution License("CDDL") (collectively, the "License"). You
009: * may not use this file except in compliance with the License. You can obtain
010: * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
011: * or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific
012: * language governing permissions and limitations under the License.
013: *
014: * When distributing the software, include this License Header Notice in each
015: * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
016: * Sun designates this particular file as subject to the "Classpath" exception
017: * as provided by Sun in the GPL Version 2 section of the License file that
018: * accompanied this code. If applicable, add the following below the License
019: * Header, with the fields enclosed by brackets [] replaced by your own
020: * identifying information: "Portions Copyrighted [year]
021: * [name of copyright owner]"
022: *
023: * Contributor(s):
024: *
025: * If you wish your version of this file to be governed by only the CDDL or
026: * only the GPL Version 2, indicate your decision by adding "[Contributor]
027: * elects to include this software in this distribution under the [CDDL or GPL
028: * Version 2] license." If you don't indicate a single choice of license, a
029: * recipient has the option to distribute your version of this file under
030: * either the CDDL, the GPL Version 2 or to extend the choice of license to
031: * its licensees as provided above. However, if you add GPL Version 2 code
032: * and therefore, elected the GPL Version 2 license, then the option applies
033: * only if the new code is made subject to such option by the copyright
034: * holder.
035: */
036: package com.sun.xml.ws.transport.tcp.util;
037:
038: import java.nio.ByteBuffer;
039:
040: /**
041: * Class was copied from GlassFish Grizzly sources to be available
042: * also for client side and don't require GlassFish to be installed
043: *
044: * Factory class used to create views of a <code>ByteBuffer</code>.
045: * The ByteBuffer can by direct or not.
046: *
047: * @author Jean-Francois Arcand
048: */
049: public final class ByteBufferFactory {
050:
051: /**
052: * The default capacity of the default view of a <code>ByteBuffer</code>
053: */
054: public static int defaultCapacity = 9000;
055:
056: /**
057: * The default capacity of the <code>ByteBuffer</code> from which views
058: * will be created.
059: */
060: public static int capacity = 4000000;
061:
062: /**
063: * The <code>ByteBuffer</code> used to create views.
064: */
065: private static ByteBuffer byteBuffer;
066:
067: /**
068: * Private constructor.
069: */
070: private ByteBufferFactory() {
071: }
072:
073: /**
074: * Return a direct <code>ByteBuffer</code> view
075: * @param size the Size of the <code>ByteBuffer</code>
076: */
077: public synchronized static ByteBuffer allocateView(final int size,
078: final boolean direct) {
079: if (byteBuffer == null
080: || (byteBuffer.capacity() - byteBuffer.limit() < size)) {
081: if (direct)
082: byteBuffer = ByteBuffer.allocateDirect(capacity);
083: else
084: byteBuffer = ByteBuffer.allocate(capacity);
085: }
086:
087: byteBuffer.limit(byteBuffer.position() + size);
088: final ByteBuffer view = byteBuffer.slice();
089: byteBuffer.position(byteBuffer.limit());
090:
091: return view;
092: }
093:
094: /**
095: * Return a direct <code>ByteBuffer</code> view using the default size.
096: */
097: public synchronized static ByteBuffer allocateView(
098: final boolean direct) {
099: return allocateView(defaultCapacity, direct);
100: }
101:
102: }
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