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/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
package com.sun.star.lib.uno.adapter;
import java.io.IOException;
import com.sun.star.io.XInputStream;
import java.io.InputStream;
/** The <code>InputStreamToInputXStreamAdapter</code> wraps the
Java <code>InputStream</code> object into a
UNO <code>XInputStream</code> object.
This allows users to access an <code>InputStream</code>
as if it were an <code>XInputStream</code>.
*/
public final class InputStreamToXInputStreamAdapter implements XInputStream {
/**
* Internal store to the InputStream
*/
private InputStream iIn;
/**
* Constructor.
*
* @param in The <code>XInputStream</code> to be
* accessed as an <code>InputStream</code>.
*/
public InputStreamToXInputStreamAdapter (InputStream in)
{
iIn = in;
}
public int available() throws
com.sun.star.io.IOException
{
int bytesAvail;
try {
bytesAvail = iIn.available();
} catch (IOException e) {
throw new com.sun.star.io.IOException(e);
}
return(bytesAvail);
}
public void closeInput() throws
com.sun.star.io.IOException
{
try {
iIn.close();
} catch (IOException e) {
throw new com.sun.star.io.IOException(e);
}
}
public int readBytes(byte[][] b, int len) throws
com.sun.star.io.IOException
{
try {
long bytesRead;
if (len >iIn.available()) {
bytesRead = iIn.read(b[0], 0, iIn.available());
}
else{
bytesRead = iIn.read(b[0], 0, len);
}
// Casting bytesRead to an int is okay, since the user can
// only pass in an integer length to read, so the bytesRead
// must <= len.
if (bytesRead <= 0) {
return(0);
}
return ((int)bytesRead);
} catch (IOException e) {
throw new com.sun.star.io.IOException("reader error", e);
}
}
public int readSomeBytes(byte[][] b, int len) throws
com.sun.star.io.IOException
{
try {
long bytesRead;
if (len >iIn.available()) {
bytesRead = iIn.read(b[0], 0, iIn.available());
}
else{
bytesRead = iIn.read(b[0], 0, len);
}
// Casting bytesRead to an int is okay, since the user can
// only pass in an integer length to read, so the bytesRead
// must <= len.
if (bytesRead <= 0) {
return(0);
}
return ((int)bytesRead);
} catch (IOException e) {
throw new com.sun.star.io.IOException("reader error", e);
}
}
public void skipBytes(int n) throws
com.sun.star.io.IOException
{
int tmpLongVal = n;
int tmpIntVal;
try {
iIn.available();
} catch (IOException e) {
throw new com.sun.star.io.IOException(e);
}
do {
if (tmpLongVal >= Integer.MAX_VALUE) {
tmpIntVal = Integer.MAX_VALUE;
} else {
// Casting is safe here.
tmpIntVal = tmpLongVal;
}
tmpLongVal -= tmpIntVal;
try {
iIn.skip(tmpIntVal);
} catch (IOException e) {
throw new com.sun.star.io.IOException(e);
}
} while (tmpLongVal > 0);
}
}
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