1 /* BinaryRefAddr.java -- RefAddr that uses a byte array as content. 2 Copyright (C) 2001 Free Software Foundation, Inc. 3 4 This file is part of GNU Classpath. 5 6 GNU Classpath is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 2, or (at your option) 9 any later version. 10 11 GNU Classpath is distributed in the hope that it will be useful, but 12 WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GNU Classpath; see the file COPYING. If not, write to the 18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 19 02110-1301 USA. 20 21 Linking this library statically or dynamically with other modules is 22 making a combined work based on this library. Thus, the terms and 23 conditions of the GNU General Public License cover the whole 24 combination. 25 26 As a special exception, the copyright holders of this library give you 27 permission to link this library with independent modules to produce an 28 executable, regardless of the license terms of these independent 29 modules, and to copy and distribute the resulting executable under 30 terms of your choice, provided that you also meet, for each linked 31 independent module, the terms and conditions of the license of that 32 module. An independent module is a module which is not derived from 33 or based on this library. If you modify this library, you may extend 34 this exception to your version of the library, but you are not 35 obligated to do so. If you do not wish to do so, delete this 36 exception statement from your version. */ 37 38 package javax.naming; 39 40 import gnu.java.lang.CPStringBuilder; 41 42 import java.util.Arrays; 43 44 /** 45 * RefAddr that uses a byte array as content. 46 * This can be used to reference objects that can only be represented as 47 * byte arrays. 48 * 49 * @see Reference 50 * @since 1.3 51 * @author Mark Wielaard (mark@klomp.org) 52 */ 53 public class BinaryRefAddr extends RefAddr 54 { 55 static final long serialVersionUID = -3415254970957330361L; 56 57 /** 58 * The possibly null content of this RefAddr. 59 * Set by the constructor and returned by getContent. 60 */ 61 private final byte[] buf; 62 63 /** 64 * Contructs a new BinaryRefAddr with the given type and content. 65 * The complete content of the byte array is copied to a new array. 66 */ BinaryRefAddr(String addrType, byte[] buf)67 public BinaryRefAddr (String addrType, byte[] buf) 68 { 69 this(addrType, buf, 0, buf.length); 70 } 71 72 /** 73 * Contructs a new BinaryRefAddr with the given type and the content 74 * taken from the given byte array. 75 * The content of the byte array is copied to a new array. 76 */ BinaryRefAddr(String addrType, byte[] buf, int off, int length)77 public BinaryRefAddr (String addrType, byte[] buf, int off, int length) 78 { 79 super(addrType); 80 this.buf = new byte[length]; 81 System.arraycopy(buf, off, this.buf, 0, length); 82 } 83 84 /** 85 * Returns the byte array contents as given to the constructor. 86 * The returned byte array is shared with this object and other callers. 87 * Changing the content of the buffer is discouraged and should only be 88 * done when the byte array is locked. 89 */ getContent()90 public Object getContent () 91 { 92 return buf; 93 } 94 95 /** 96 * Checks if the object is a BinaryRefAddr with the same type and with the 97 * same bytes in the content. 98 * 99 * @return true if the given object is an instance of BinaryRefAddr, 100 * the addrType is the same as this addrType and the bytes of the 101 * content are the same. 102 */ equals(Object o)103 public boolean equals(Object o) 104 { 105 if (o instanceof BinaryRefAddr) 106 { 107 BinaryRefAddr refAddr = (BinaryRefAddr) o; 108 if (this.getType().equals(refAddr.getType())) 109 { 110 byte[] c1 = (byte[]) this.getContent(); 111 byte[] c2 = (byte[]) refAddr.getContent(); 112 return Arrays.equals(c1, c2); 113 } 114 } 115 return false; 116 } 117 118 /** 119 * Returns the hashCode which is the hasCode of the String returned by 120 * <code>getType()</code> plus the hashCode of the byte array returned by 121 * <code>getContent</code>. The hashCode of the byte array is calculated 122 * by taking the xor of all the bytes in the array, or zero when there are 123 * no bytes in the array. 124 */ hashCode()125 public int hashCode() 126 { 127 int result = 0; 128 byte[] b = (byte[]) getContent(); 129 for (int i=0; i < b.length; i++) 130 result = result^b[i]; 131 132 return getType().hashCode() + result; 133 } 134 135 private static char[] hex = {'0', '1', '2', '3', '4', '5', '6', '7', 136 '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'}; 137 /** 138 * Returns a String representation of the RefAddr. Only the first 32 bytes 139 * of the content are added as hex encoded characters. 140 * Should only be used for debugging purposes. 141 */ toString()142 public String toString() 143 { 144 CPStringBuilder sb = new CPStringBuilder("[RefAddr type: "); 145 sb.append(getType()); 146 sb.append(" content: 0x"); 147 byte[] b = (byte[]) getContent(); 148 for (int i=0; i < b.length && i < 32; i++) 149 { 150 sb.append(hex[(b[i]&0xf0)>>4]); 151 sb.append(hex[b[i]&0x0f]); 152 } 153 if (b.length > 32) 154 sb.append("..."); 155 sb.append("]"); 156 return sb.toString(); 157 } 158 } 159