1 /* BufferredCdrInput.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.CDR; 40 41 42 /** 43 * The CDR input stream that reads data from the byte buffer. 44 * 45 * @author Audrius Meskauskas (AudriusA@Bioinformatics.org) 46 */ 47 public class BufferredCdrInput 48 extends AbstractCdrInput 49 implements gnuValueStream 50 { 51 /** 52 * Use serialVersionUID for interoperability. 53 */ 54 private static final long serialVersionUID = 1; 55 56 /** 57 * The byte array input stream to read data from. 58 */ 59 public final AligningInput buffer; 60 61 /** 62 * Creates the CDR input stream that reads from the given buffer 63 * array. 64 * 65 * @param a_buffer an array to read from. 66 */ BufferredCdrInput(byte[] a_buffer)67 public BufferredCdrInput(byte[] a_buffer) 68 { 69 buffer = new AligningInput(a_buffer); 70 setInputStream(buffer); 71 } 72 73 /** 74 * Set the alignment offset, if the index of the first byte in the 75 * stream is different from 0. 76 */ setOffset(int offset)77 public void setOffset(int offset) 78 { 79 buffer.setOffset(offset); 80 } 81 82 /** 83 * Skip several bytes, aligning the internal pointer on the 84 * selected boundary. 85 */ align(int alignment)86 public void align(int alignment) 87 { 88 buffer.align(alignment); 89 } 90 91 /** 92 * Mark the current position. 93 * @param ahead 94 */ mark(int ahead)95 public synchronized void mark(int ahead) 96 { 97 buffer.mark(ahead); 98 } 99 100 /** 101 * Checks if marking is supported. 102 * @return 103 */ markSupported()104 public boolean markSupported() 105 { 106 return buffer.markSupported(); 107 } 108 109 /** 110 * Resets the stream to the previously marked position. 111 */ reset()112 public void reset() 113 { 114 buffer.reset(); 115 setInputStream(buffer); 116 } 117 118 /** 119 * Get the current position in the buffer. 120 * 121 * @return The position in the buffer, taking offset into consideration. 122 */ getPosition()123 public int getPosition() 124 { 125 return buffer.getPosition(); 126 } 127 128 /** 129 * Jump to the given position, taking offset into consideration. 130 */ seek(int position)131 public void seek(int position) 132 { 133 buffer.seek(position); 134 setInputStream(buffer); 135 } 136 137 /** 138 * Get the associated RunTime. 139 */ getRunTime()140 public gnuRuntime getRunTime() 141 { 142 return runtime; 143 } 144 145 /** 146 * Replace the instance of RunTime. 147 */ setRunTime(gnuRuntime a_runtime)148 public void setRunTime(gnuRuntime a_runtime) 149 { 150 runtime = a_runtime; 151 } 152 153 } 154