Coverage Report - com.sun.grizzly.util.ByteBufferFactory
 
Classes in this File Line Coverage Branch Coverage Complexity
ByteBufferFactory
52 %
13/25
32 %
7/22
0
ByteBufferFactory$ByteBufferType
100 %
1/1
N/A
0
 
 1  
 /*
 2  
  * 
 3  
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 4  
  * 
 5  
  * Copyright 2007-2008 Sun Microsystems, Inc. All rights reserved.
 6  
  * 
 7  
  * The contents of this file are subject to the terms of either the GNU
 8  
  * General Public License Version 2 only ("GPL") or the Common Development
 9  
  * and Distribution License("CDDL") (collectively, the "License").  You
 10  
  * may not use this file except in compliance with the License. You can obtain
 11  
  * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
 12  
  * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
 13  
  * language governing permissions and limitations under the License.
 14  
  * 
 15  
  * When distributing the software, include this License Header Notice in each
 16  
  * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
 17  
  * Sun designates this particular file as subject to the "Classpath" exception
 18  
  * as provided by Sun in the GPL Version 2 section of the License file that
 19  
  * accompanied this code.  If applicable, add the following below the License
 20  
  * Header, with the fields enclosed by brackets [] replaced by your own
 21  
  * identifying information: "Portions Copyrighted [year]
 22  
  * [name of copyright owner]"
 23  
  * 
 24  
  * Contributor(s):
 25  
  * 
 26  
  * If you wish your version of this file to be governed by only the CDDL or
 27  
  * only the GPL Version 2, indicate your decision by adding "[Contributor]
 28  
  * elects to include this software in this distribution under the [CDDL or GPL
 29  
  * Version 2] license."  If you don't indicate a single choice of license, a
 30  
  * recipient has the option to distribute your version of this file under
 31  
  * either the CDDL, the GPL Version 2 or to extend the choice of license to
 32  
  * its licensees as provided above.  However, if you add GPL Version 2 code
 33  
  * and therefore, elected the GPL Version 2 license, then the option applies
 34  
  * only if the new code is made subject to such option by the copyright
 35  
  * holder.
 36  
  *
 37  
  */
 38  
 
 39  
 package com.sun.grizzly.util;
 40  
 
 41  
 import java.nio.ByteBuffer;
 42  
 
 43  
 
 44  
 /**
 45  
  * Factory class used to create {@link ByteBuffer}. 
 46  
  *
 47  
  * The ByteBuffer can by direct (ByteBufferType.DIRECT) or heap (ByteBufferType.HEAP)
 48  
  * a view (ByteBufferType.DIRECT_VIEW) or ByteBufferType.HEAP_VIEW)
 49  
  * or backed by an array (ByteBufferType.HEAP_ARRAY).
 50  
  *
 51  
  * @author Jean-Francois Arcand
 52  
  */
 53  
 public class ByteBufferFactory{
 54  
 
 55  
     /**
 56  
      * An enumeration of all type of ByteBuffer this object can create.
 57  
      */
 58  6
     public enum ByteBufferType { DIRECT, HEAP, DIRECT_VIEW, HEAP_VIEW, HEAP_ARRAY }
 59  
     
 60  
     
 61  
     /**
 62  
      * The default capacity of the default view of a {@link ByteBuffer}
 63  
      */ 
 64  1
     public static int defaultCapacity = 8192;
 65  
     
 66  
     
 67  
     /**
 68  
      * The default capacity of the {@link ByteBuffer} from which views
 69  
      * will be created.
 70  
      */
 71  1
     public static int capacity = 4000000; 
 72  
     
 73  
     
 74  
     /**
 75  
      * The {@link ByteBuffer} used to create direct byteBuffer view.
 76  
      */
 77  
     private static ByteBuffer directByteBuffer;
 78  
         
 79  
     
 80  
     /**
 81  
      * The {@link ByteBuffer} used to create direct byteBuffer view.
 82  
      */
 83  
     private static ByteBuffer heapByteBuffer;
 84  
     
 85  
     
 86  
     /**
 87  
      * Private constructor.
 88  
      */
 89  0
     private ByteBufferFactory(){
 90  0
     }
 91  
     
 92  
     
 93  
     /**
 94  
      * Return a direct {@link ByteBuffer} view
 95  
      * @param size the Size of the {@link ByteBuffer}
 96  
      * @param direct - direct or non-direct buffer?
 97  
      * @return {@link ByteBuffer}
 98  
      */ 
 99  
     public synchronized static ByteBuffer allocateView(int size, boolean direct){
 100  729
         if (direct && (directByteBuffer == null || 
 101  
                (directByteBuffer.capacity() - directByteBuffer.limit() < size))){
 102  0
             directByteBuffer = ByteBuffer.allocateDirect(capacity);                 
 103  729
         } else if (heapByteBuffer == null || 
 104  
                (heapByteBuffer.capacity() - heapByteBuffer.limit() < size)){
 105  1
             heapByteBuffer = ByteBuffer.allocate(capacity);            
 106  
         }
 107  729
         ByteBuffer byteBuffer = (direct ? directByteBuffer : heapByteBuffer);
 108  
 
 109  729
         byteBuffer.limit(byteBuffer.position() + size);
 110  729
         ByteBuffer view = byteBuffer.slice();
 111  729
         byteBuffer.position(byteBuffer.limit());  
 112  
         
 113  729
         return view;
 114  
     }
 115  
 
 116  
     
 117  
     /**
 118  
      * Return a direct {@link ByteBuffer} view using the default size.
 119  
      * @param direct - direct or non-direct buffer
 120  
      * @return {@link ByteBuffer}
 121  
      */ 
 122  
     public synchronized static ByteBuffer allocateView(boolean direct){
 123  0
         return allocateView(defaultCapacity, direct);
 124  
     }
 125  
      
 126  
     
 127  
     /**
 128  
      * Return a new ByteBuffer based on the requested <code>ByteBufferType</code>
 129  
      * @param type the requested <code>ByteBufferType</code>
 130  
      * @param size the {@link ByteBuffer} size.
 131  
      * @return a new ByteBuffer based on the requested <code>ByteBufferType</code>
 132  
      */
 133  
     public static ByteBuffer allocate(ByteBufferType type,int size){       
 134  364
         if (type == ByteBufferType.HEAP){
 135  0
             return ByteBuffer.allocate(size);
 136  364
         } else if (type == ByteBufferType.HEAP_VIEW) {
 137  364
             return allocateView(size,false);
 138  0
         } else if (type == ByteBufferType.HEAP_ARRAY) {
 139  0
             return ByteBuffer.wrap(new byte[size]);
 140  0
         } else if (type == ByteBufferType.DIRECT){
 141  0
            return ByteBuffer.allocateDirect(size); 
 142  0
         } else if (type == ByteBufferType.DIRECT_VIEW){
 143  0
             return allocateView(size,true);
 144  
         } else {
 145  0
             throw new IllegalStateException("Invalid ByteBuffer Type");
 146  
         }
 147  
     }
 148  
 }