1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218
/* * @(#)ObjectStreamConstants.java 1.36 06/04/07 * * Copyright 2006 Sun Microsystems, Inc. All rights reserved. * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. */ package java.io; /** * Constants written into the Object Serialization Stream. * * @author unascribed * @version 1.36, 04/07/06 * @since JDK 1.1 */ public interface ObjectStreamConstants { /** * Magic number that is written to the stream header. */ final static short STREAM_MAGIC = (short)0xaced; /** * Version number that is written to the stream header. */ final static short STREAM_VERSION = 5; /* Each item in the stream is preceded by a tag */ /** * First tag value. */ final static byte TC_BASE = 0x70; /** * Null object reference. */ final static byte TC_NULL = (byte)0x70; /** * Reference to an object already written into the stream. */ final static byte TC_REFERENCE = (byte)0x71; /** * new Class Descriptor. */ final static byte TC_CLASSDESC = (byte)0x72; /** * new Object. */ final static byte TC_OBJECT = (byte)0x73; /** * new String. */ final static byte TC_STRING = (byte)0x74; /** * new Array. */ final static byte TC_ARRAY = (byte)0x75; /** * Reference to Class. */ final static byte TC_CLASS = (byte)0x76; /** * Block of optional data. Byte following tag indicates number * of bytes in this block data. */ final static byte TC_BLOCKDATA = (byte)0x77; /** * End of optional block data blocks for an object. */ final static byte TC_ENDBLOCKDATA = (byte)0x78; /** * Reset stream context. All handles written into stream are reset. */ final static byte TC_RESET = (byte)0x79; /** * long Block data. The long following the tag indicates the * number of bytes in this block data. */ final static byte TC_BLOCKDATALONG= (byte)0x7A; /** * Exception during write. */ final static byte TC_EXCEPTION = (byte)0x7B; /** * Long string. */ final static byte TC_LONGSTRING = (byte)0x7C; /** * new Proxy Class Descriptor. */ final static byte TC_PROXYCLASSDESC = (byte)0x7D; /** * new Enum constant. * @since 1.5 */ final static byte TC_ENUM = (byte)0x7E; /** * Last tag value. */ final static byte TC_MAX = (byte)0x7E; /** * First wire handle to be assigned. */ final static int baseWireHandle = 0x7e0000; /******************************************************/ /* Bit masks for ObjectStreamClass flag.*/ /** * Bit mask for ObjectStreamClass flag. Indicates a Serializable class * defines its own writeObject method. */ final static byte SC_WRITE_METHOD = 0x01; /** * Bit mask for ObjectStreamClass flag. Indicates Externalizable data * written in Block Data mode. * Added for PROTOCOL_VERSION_2. * * @see #PROTOCOL_VERSION_2 * @since 1.2 */ final static byte SC_BLOCK_DATA = 0x08; /** * Bit mask for ObjectStreamClass flag. Indicates class is Serializable. */ final static byte SC_SERIALIZABLE = 0x02; /** * Bit mask for ObjectStreamClass flag. Indicates class is Externalizable. */ final static byte SC_EXTERNALIZABLE = 0x04; /** * Bit mask for ObjectStreamClass flag. Indicates class is an enum type. * @since 1.5 */ final static byte SC_ENUM = 0x10; /* *******************************************************************/ /* Security permissions */ /** * Enable substitution of one object for another during * serialization/deserialization. * * @see java.io.ObjectOutputStream#enableReplaceObject(boolean) * @see java.io.ObjectInputStream#enableResolveObject(boolean) * @since 1.2 */ final static SerializablePermission SUBSTITUTION_PERMISSION = new SerializablePermission("enableSubstitution"); /** * Enable overriding of readObject and writeObject. * * @see java.io.ObjectOutputStream#writeObjectOverride(Object) * @see java.io.ObjectInputStream#readObjectOverride() * @since 1.2 */ final static SerializablePermission SUBCLASS_IMPLEMENTATION_PERMISSION = new SerializablePermission("enableSubclassImplementation"); /** * A Stream Protocol Version. <p> * * All externalizable data is written in JDK 1.1 external data * format after calling this method. This version is needed to write * streams containing Externalizable data that can be read by * pre-JDK 1.1.6 JVMs. * * @see java.io.ObjectOutputStream#useProtocolVersion(int) * @since 1.2 */ public final static int PROTOCOL_VERSION_1 = 1; /** * A Stream Protocol Version. <p> * * This protocol is written by JVM 1.2. * * Externalizable data is written in block data mode and is * terminated with TC_ENDBLOCKDATA. Externalizable classdescriptor * flags has SC_BLOCK_DATA enabled. JVM 1.1.6 and greater can * read this format change. * * Enables writing a nonSerializable class descriptor into the * stream. The serialVersionUID of a nonSerializable class is * set to 0L. * * @see java.io.ObjectOutputStream#useProtocolVersion(int) * @see #SC_BLOCK_DATA * @since 1.2 */ public final static int PROTOCOL_VERSION_2 = 2; }