1*b1cdbd2cSJim Jagielski /************************************************************** 2*b1cdbd2cSJim Jagielski * 3*b1cdbd2cSJim Jagielski * Licensed to the Apache Software Foundation (ASF) under one 4*b1cdbd2cSJim Jagielski * or more contributor license agreements. See the NOTICE file 5*b1cdbd2cSJim Jagielski * distributed with this work for additional information 6*b1cdbd2cSJim Jagielski * regarding copyright ownership. The ASF licenses this file 7*b1cdbd2cSJim Jagielski * to you under the Apache License, Version 2.0 (the 8*b1cdbd2cSJim Jagielski * "License"); you may not use this file except in compliance 9*b1cdbd2cSJim Jagielski * with the License. You may obtain a copy of the License at 10*b1cdbd2cSJim Jagielski * 11*b1cdbd2cSJim Jagielski * http://www.apache.org/licenses/LICENSE-2.0 12*b1cdbd2cSJim Jagielski * 13*b1cdbd2cSJim Jagielski * Unless required by applicable law or agreed to in writing, 14*b1cdbd2cSJim Jagielski * software distributed under the License is distributed on an 15*b1cdbd2cSJim Jagielski * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16*b1cdbd2cSJim Jagielski * KIND, either express or implied. See the License for the 17*b1cdbd2cSJim Jagielski * specific language governing permissions and limitations 18*b1cdbd2cSJim Jagielski * under the License. 19*b1cdbd2cSJim Jagielski * 20*b1cdbd2cSJim Jagielski *************************************************************/ 21*b1cdbd2cSJim Jagielski 22*b1cdbd2cSJim Jagielski 23*b1cdbd2cSJim Jagielski package com.sun.star.lib.uno.adapter; 24*b1cdbd2cSJim Jagielski 25*b1cdbd2cSJim Jagielski import java.io.IOException; 26*b1cdbd2cSJim Jagielski import com.sun.star.io.XInputStream; 27*b1cdbd2cSJim Jagielski import java.io.InputStream; 28*b1cdbd2cSJim Jagielski 29*b1cdbd2cSJim Jagielski /** 30*b1cdbd2cSJim Jagielski * The <code>XInputStreamToInputStreamAdapter</code> wraps 31*b1cdbd2cSJim Jagielski * the UNO <code>XInputStream</code> object in a Java 32*b1cdbd2cSJim Jagielski * <code>InputStream</code>. This allows users to access 33*b1cdbd2cSJim Jagielski * an <code>XInputStream</code> as if it were an 34*b1cdbd2cSJim Jagielski * <code>InputStream</code>. 35*b1cdbd2cSJim Jagielski * 36*b1cdbd2cSJim Jagielski * @author Brian Cameron 37*b1cdbd2cSJim Jagielski */ 38*b1cdbd2cSJim Jagielski public class XInputStreamToInputStreamAdapter extends InputStream { 39*b1cdbd2cSJim Jagielski 40*b1cdbd2cSJim Jagielski /** 41*b1cdbd2cSJim Jagielski * Internal handle to the XInputStream 42*b1cdbd2cSJim Jagielski */ 43*b1cdbd2cSJim Jagielski private XInputStream xin; 44*b1cdbd2cSJim Jagielski 45*b1cdbd2cSJim Jagielski /** 46*b1cdbd2cSJim Jagielski * Constructor. 47*b1cdbd2cSJim Jagielski * 48*b1cdbd2cSJim Jagielski * @param in The <code>XInputStream</code> to be 49*b1cdbd2cSJim Jagielski * accessed as an <code>InputStream</code>. 50*b1cdbd2cSJim Jagielski */ XInputStreamToInputStreamAdapter(XInputStream in)51*b1cdbd2cSJim Jagielski public XInputStreamToInputStreamAdapter (XInputStream in) { 52*b1cdbd2cSJim Jagielski xin = in; 53*b1cdbd2cSJim Jagielski } 54*b1cdbd2cSJim Jagielski available()55*b1cdbd2cSJim Jagielski public int available() throws IOException { 56*b1cdbd2cSJim Jagielski 57*b1cdbd2cSJim Jagielski int bytesAvail; 58*b1cdbd2cSJim Jagielski 59*b1cdbd2cSJim Jagielski try { 60*b1cdbd2cSJim Jagielski bytesAvail = xin.available(); 61*b1cdbd2cSJim Jagielski } catch (Exception e) { 62*b1cdbd2cSJim Jagielski throw new IOException(e.toString()); 63*b1cdbd2cSJim Jagielski } 64*b1cdbd2cSJim Jagielski 65*b1cdbd2cSJim Jagielski return(bytesAvail); 66*b1cdbd2cSJim Jagielski } 67*b1cdbd2cSJim Jagielski close()68*b1cdbd2cSJim Jagielski public void close() throws IOException { 69*b1cdbd2cSJim Jagielski try { 70*b1cdbd2cSJim Jagielski xin.closeInput(); 71*b1cdbd2cSJim Jagielski } catch (Exception e) { 72*b1cdbd2cSJim Jagielski throw new IOException(e.toString()); 73*b1cdbd2cSJim Jagielski } 74*b1cdbd2cSJim Jagielski } 75*b1cdbd2cSJim Jagielski read()76*b1cdbd2cSJim Jagielski public int read () throws IOException { 77*b1cdbd2cSJim Jagielski byte [][] tmp = new byte [1][1]; 78*b1cdbd2cSJim Jagielski try { 79*b1cdbd2cSJim Jagielski long bytesRead = xin.readBytes(tmp, 1); 80*b1cdbd2cSJim Jagielski 81*b1cdbd2cSJim Jagielski if (bytesRead <= 0) { 82*b1cdbd2cSJim Jagielski return (-1); 83*b1cdbd2cSJim Jagielski } else { 84*b1cdbd2cSJim Jagielski int tmpInt = tmp[0][0]; 85*b1cdbd2cSJim Jagielski if (tmpInt< 0 ){ 86*b1cdbd2cSJim Jagielski tmpInt = 256 +tmpInt; 87*b1cdbd2cSJim Jagielski } 88*b1cdbd2cSJim Jagielski return(tmpInt); 89*b1cdbd2cSJim Jagielski } 90*b1cdbd2cSJim Jagielski 91*b1cdbd2cSJim Jagielski } catch (Exception e) { 92*b1cdbd2cSJim Jagielski throw new IOException(e.toString()); 93*b1cdbd2cSJim Jagielski } 94*b1cdbd2cSJim Jagielski } 95*b1cdbd2cSJim Jagielski read(byte[] b)96*b1cdbd2cSJim Jagielski public int read (byte[] b) throws IOException { 97*b1cdbd2cSJim Jagielski 98*b1cdbd2cSJim Jagielski byte [][] tmp = new byte [1][b.length]; 99*b1cdbd2cSJim Jagielski int bytesRead; 100*b1cdbd2cSJim Jagielski 101*b1cdbd2cSJim Jagielski try { 102*b1cdbd2cSJim Jagielski bytesRead = xin.readBytes(tmp, b.length); 103*b1cdbd2cSJim Jagielski if (bytesRead <= 0) { 104*b1cdbd2cSJim Jagielski return(-1); 105*b1cdbd2cSJim Jagielski } else if (bytesRead < b.length) { 106*b1cdbd2cSJim Jagielski System.arraycopy(tmp[0], 0, b, 0, bytesRead); 107*b1cdbd2cSJim Jagielski } else { 108*b1cdbd2cSJim Jagielski System.arraycopy(tmp[0], 0, b, 0, b.length); 109*b1cdbd2cSJim Jagielski } 110*b1cdbd2cSJim Jagielski } catch (Exception e) { 111*b1cdbd2cSJim Jagielski throw new IOException(e.toString()); 112*b1cdbd2cSJim Jagielski } 113*b1cdbd2cSJim Jagielski 114*b1cdbd2cSJim Jagielski return (bytesRead); 115*b1cdbd2cSJim Jagielski } 116*b1cdbd2cSJim Jagielski read(byte[] b, int off, int len)117*b1cdbd2cSJim Jagielski public int read(byte[] b, int off, int len) throws IOException { 118*b1cdbd2cSJim Jagielski int count = 0; 119*b1cdbd2cSJim Jagielski byte [][] tmp = new byte [1][b.length]; 120*b1cdbd2cSJim Jagielski try { 121*b1cdbd2cSJim Jagielski long bytesRead=0; 122*b1cdbd2cSJim Jagielski int av = xin.available(); 123*b1cdbd2cSJim Jagielski if ( av != 0 && len > av) { 124*b1cdbd2cSJim Jagielski bytesRead = xin.readBytes(tmp, av); 125*b1cdbd2cSJim Jagielski } 126*b1cdbd2cSJim Jagielski else{ 127*b1cdbd2cSJim Jagielski bytesRead = xin.readBytes(tmp,len); 128*b1cdbd2cSJim Jagielski } 129*b1cdbd2cSJim Jagielski // Casting bytesRead to an int is okay, since the user can 130*b1cdbd2cSJim Jagielski // only pass in an integer length to read, so the bytesRead 131*b1cdbd2cSJim Jagielski // must <= len. 132*b1cdbd2cSJim Jagielski // 133*b1cdbd2cSJim Jagielski if (bytesRead <= 0) { 134*b1cdbd2cSJim Jagielski return(-1); 135*b1cdbd2cSJim Jagielski } else if (bytesRead < len) { 136*b1cdbd2cSJim Jagielski System.arraycopy(tmp[0], 0, b, off, (int)bytesRead); 137*b1cdbd2cSJim Jagielski } else { 138*b1cdbd2cSJim Jagielski System.arraycopy(tmp[0], 0, b, off, len); 139*b1cdbd2cSJim Jagielski } 140*b1cdbd2cSJim Jagielski 141*b1cdbd2cSJim Jagielski return ((int)bytesRead); 142*b1cdbd2cSJim Jagielski 143*b1cdbd2cSJim Jagielski 144*b1cdbd2cSJim Jagielski } catch (Exception e) { 145*b1cdbd2cSJim Jagielski throw new IOException("reader error: "+e.toString()); 146*b1cdbd2cSJim Jagielski } 147*b1cdbd2cSJim Jagielski } 148*b1cdbd2cSJim Jagielski skip(long n)149*b1cdbd2cSJim Jagielski public long skip(long n) throws IOException { 150*b1cdbd2cSJim Jagielski 151*b1cdbd2cSJim Jagielski int avail; 152*b1cdbd2cSJim Jagielski long tmpLongVal = n; 153*b1cdbd2cSJim Jagielski int tmpIntVal; 154*b1cdbd2cSJim Jagielski 155*b1cdbd2cSJim Jagielski try { 156*b1cdbd2cSJim Jagielski avail = xin.available(); 157*b1cdbd2cSJim Jagielski } catch (Exception e) { 158*b1cdbd2cSJim Jagielski throw new IOException(e.toString()); 159*b1cdbd2cSJim Jagielski } 160*b1cdbd2cSJim Jagielski 161*b1cdbd2cSJim Jagielski do { 162*b1cdbd2cSJim Jagielski if (tmpLongVal >= Integer.MAX_VALUE) { 163*b1cdbd2cSJim Jagielski tmpIntVal = Integer.MAX_VALUE; 164*b1cdbd2cSJim Jagielski } else { 165*b1cdbd2cSJim Jagielski // Casting is safe here. 166*b1cdbd2cSJim Jagielski tmpIntVal = (int)tmpLongVal; 167*b1cdbd2cSJim Jagielski } 168*b1cdbd2cSJim Jagielski tmpLongVal -= tmpIntVal; 169*b1cdbd2cSJim Jagielski 170*b1cdbd2cSJim Jagielski try { 171*b1cdbd2cSJim Jagielski xin.skipBytes(tmpIntVal); 172*b1cdbd2cSJim Jagielski } catch (Exception e) { 173*b1cdbd2cSJim Jagielski throw new IOException(e.toString()); 174*b1cdbd2cSJim Jagielski } 175*b1cdbd2cSJim Jagielski } while (tmpLongVal > 0); 176*b1cdbd2cSJim Jagielski 177*b1cdbd2cSJim Jagielski if ( avail != 0 && avail < n) { 178*b1cdbd2cSJim Jagielski return(avail); 179*b1cdbd2cSJim Jagielski } else { 180*b1cdbd2cSJim Jagielski return(n); 181*b1cdbd2cSJim Jagielski } 182*b1cdbd2cSJim Jagielski } 183*b1cdbd2cSJim Jagielski 184*b1cdbd2cSJim Jagielski /** 185*b1cdbd2cSJim Jagielski * Tests if this input stream supports the mark and reset methods. 186*b1cdbd2cSJim Jagielski * The markSupported method of 187*b1cdbd2cSJim Jagielski * <code>XInputStreamToInputStreamAdapter</code> returns false. 188*b1cdbd2cSJim Jagielski * 189*b1cdbd2cSJim Jagielski * @returns false 190*b1cdbd2cSJim Jagielski */ markSupported()191*b1cdbd2cSJim Jagielski public boolean markSupported() { 192*b1cdbd2cSJim Jagielski return false; 193*b1cdbd2cSJim Jagielski } 194*b1cdbd2cSJim Jagielski mark(int readlimit)195*b1cdbd2cSJim Jagielski public void mark(int readlimit) { 196*b1cdbd2cSJim Jagielski // Not supported. 197*b1cdbd2cSJim Jagielski } 198*b1cdbd2cSJim Jagielski reset()199*b1cdbd2cSJim Jagielski public void reset() throws IOException { 200*b1cdbd2cSJim Jagielski // Not supported. 201*b1cdbd2cSJim Jagielski } 202*b1cdbd2cSJim Jagielski } 203*b1cdbd2cSJim Jagielski 204