1 /* universalStreamable.java -- 2 Copyright (C) 2005 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 39 package gnu.CORBA; 40 41 import gnu.CORBA.CDR.BufferredCdrInput; 42 import gnu.CORBA.CDR.BufferedCdrOutput; 43 44 import org.omg.CORBA.BAD_OPERATION; 45 import org.omg.CORBA.MARSHAL; 46 import org.omg.CORBA.TypeCode; 47 import org.omg.CORBA.portable.InputStream; 48 import org.omg.CORBA.portable.OutputStream; 49 import org.omg.CORBA.portable.Streamable; 50 51 import java.io.IOException; 52 53 /** 54 * This class holds the abstract binary data array of the Streamable 55 * being stored. It is used to insert and extract into {@link Any} objects 56 * that have no holder, but have the helper classes. 57 * Encoding/decoding then must be performed by the helper. This class is 58 * defined as package private because it is not idiot proof and 59 * must be used with care. 60 * 61 * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org) 62 */ 63 public class GeneralHolder 64 implements Streamable 65 { 66 /** 67 * The binary data, stored inside this holder. 68 */ 69 private BufferedCdrOutput value = new BufferedCdrOutput(); 70 71 /** 72 * Create the universal holder that uses the given buffer to store the data. 73 */ GeneralHolder(BufferedCdrOutput buffer)74 public GeneralHolder(BufferedCdrOutput buffer) 75 { 76 value = buffer; 77 } 78 79 /** 80 * Reads into the internal buffer till the end of stream is 81 * reached. No alignment operations are performed. This operation 82 * normally reads from the stream, where the single value, 83 * stored using {@link #_write}, is written. 84 * 85 * @throws MARSHALL, if the IOException is thrown during the 86 * stream operation. 87 */ _read(InputStream input)88 public void _read(InputStream input) 89 { 90 try 91 { 92 if (input instanceof BufferredCdrInput) 93 { 94 BufferredCdrInput b = (BufferredCdrInput) input; 95 value.write(b.buffer.getBuffer()); 96 } 97 else 98 { 99 int c; 100 101 do 102 { 103 c = input.read(); 104 if (c >= 0) 105 value.write(c); 106 } 107 while (c >= 0); 108 } 109 } 110 catch (IOException ex) 111 { 112 MARSHAL t = new MARSHAL(); 113 t.minor = Minor.Any; 114 t.initCause(ex); 115 throw t; 116 } 117 } 118 119 /** 120 * The type is not known and cannot be returned. 121 * 122 * @throws BAD_OPERATION, always. 123 */ _type()124 public TypeCode _type() 125 { 126 BAD_OPERATION bad = new BAD_OPERATION(); 127 bad.minor = Minor.Inappropriate; 128 throw bad; 129 } 130 131 /** 132 * Writes the binary data being stored into the given output 133 * stream. This operation supposes that the current stream 134 * position is 0 or satisfies the required alignments anyway. 135 * 136 * @throws MARSHAL if the IOExeption is thrown when writing the 137 * byte array. 138 */ _write(OutputStream output)139 public void _write(OutputStream output) 140 { 141 try 142 { 143 value.buffer.writeTo(output); 144 } 145 catch (IOException ex) 146 { 147 MARSHAL t = new MARSHAL(); 148 t.minor = Minor.Any; 149 t.initCause(ex); 150 throw t; 151 } 152 } 153 154 /** 155 * Get the input stream that reads the fields of the stored value. 156 */ getInputStream()157 InputStream getInputStream() 158 { 159 return value.create_input_stream(); 160 } 161 162 /** 163 * Clone. 164 */ Clone()165 public GeneralHolder Clone() 166 { 167 try 168 { 169 BufferedCdrOutput nb = new BufferedCdrOutput(value.buffer.size()); 170 value.buffer.writeTo(nb); 171 return new GeneralHolder(nb); 172 } 173 catch (IOException ex) 174 { 175 throw new Unexpected(ex); 176 } 177 } 178 } 179