1 /************************************************************************* 2 * 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * Copyright 2000, 2010 Oracle and/or its affiliates. 6 * 7 * OpenOffice.org - a multi-platform office productivity suite 8 * 9 * This file is part of OpenOffice.org. 10 * 11 * OpenOffice.org is free software: you can redistribute it and/or modify 12 * it under the terms of the GNU Lesser General Public License version 3 13 * only, as published by the Free Software Foundation. 14 * 15 * OpenOffice.org is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU Lesser General Public License version 3 for more details 19 * (a copy is included in the LICENSE file that accompanied this code). 20 * 21 * You should have received a copy of the GNU Lesser General Public License 22 * version 3 along with OpenOffice.org. If not, see 23 * <http://www.openoffice.org/license.html> 24 * for a copy of the LGPLv3 License. 25 * 26 ************************************************************************/ 27 package com.sun.star.lib.uno.adapter; 28 29 import java.io.IOException; 30 import com.sun.star.io.XInputStream; 31 import java.io.InputStream; 32 33 /** The <code>InputStreamToInputXStreamAdapter</code> wraps the 34 Java <code>InputStream</code> object into a 35 UNO <code>XInputStream</code> object. 36 This allows users to access an <code>InputStream</code> 37 as if it were an <code>XInputStream</code>. 38 */ 39 public class InputStreamToXInputStreamAdapter implements XInputStream { 40 41 /** 42 * Internal store to the InputStream 43 */ 44 private InputStream iIn; 45 46 /** 47 * Constructor. 48 * 49 * @param in The <code>XInputStream</code> to be 50 * accessed as an <code>InputStream</code>. 51 */ 52 public InputStreamToXInputStreamAdapter (InputStream in) 53 { 54 iIn = in; 55 } 56 57 public int available() throws 58 com.sun.star.io.IOException 59 { 60 61 int bytesAvail; 62 63 try { 64 bytesAvail = iIn.available(); 65 } catch (IOException e) { 66 throw new com.sun.star.io.IOException(e.toString()); 67 } 68 69 return(bytesAvail); 70 } 71 72 public void closeInput() throws 73 com.sun.star.io.IOException 74 { 75 try { 76 iIn.close(); 77 } catch (IOException e) { 78 throw new com.sun.star.io.IOException(e.toString()); 79 } 80 } 81 82 public int readBytes(byte[][] b, int len) throws 83 com.sun.star.io.IOException 84 { 85 int count = 0; 86 try { 87 long bytesRead=0; 88 if (len >iIn.available()) { 89 bytesRead = iIn.read(b[0], 0, iIn.available()); 90 } 91 else{ 92 bytesRead = iIn.read(b[0], 0, len); 93 } 94 // Casting bytesRead to an int is okay, since the user can 95 // only pass in an integer length to read, so the bytesRead 96 // must <= len. 97 // 98 if (bytesRead <= 0) { 99 return(0); 100 } 101 return ((int)bytesRead); 102 103 104 } catch (IOException e) { 105 throw new com.sun.star.io.IOException("reader error: "+e.toString()); 106 } 107 } 108 109 public int readSomeBytes(byte[][] b, int len) throws 110 com.sun.star.io.IOException 111 { 112 int count = 0; 113 try { 114 long bytesRead=0; 115 if (len >iIn.available()) { 116 bytesRead = iIn.read(b[0], 0, iIn.available()); 117 } 118 else{ 119 bytesRead = iIn.read(b[0], 0, len); 120 } 121 // Casting bytesRead to an int is okay, since the user can 122 // only pass in an integer length to read, so the bytesRead 123 // must <= len. 124 // 125 if (bytesRead <= 0) { 126 return(0); 127 } 128 return ((int)bytesRead); 129 130 131 } catch (IOException e) { 132 throw new com.sun.star.io.IOException("reader error: "+e.toString()); 133 } 134 } 135 136 public void skipBytes(int n) throws 137 com.sun.star.io.IOException 138 { 139 int avail; 140 int tmpLongVal = n; 141 int tmpIntVal; 142 143 try { 144 avail = iIn.available(); 145 } catch (IOException e) { 146 throw new com.sun.star.io.IOException(e.toString()); 147 } 148 149 do { 150 if (tmpLongVal >= Integer.MAX_VALUE) { 151 tmpIntVal = Integer.MAX_VALUE; 152 } else { 153 // Casting is safe here. 154 tmpIntVal = (int)tmpLongVal; 155 } 156 tmpLongVal -= tmpIntVal; 157 158 try { 159 iIn.skip(tmpIntVal); 160 } catch (IOException e) { 161 throw new com.sun.star.io.IOException(e.toString()); 162 } 163 } while (tmpLongVal > 0); 164 } 165 } 166 167