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/*************************************************************************
*
* The Contents of this file are made available subject to the terms of
* the BSD license.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Sun Microsystems, Inc. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*************************************************************************/
// imports
import com.sun.star.io.BufferSizeExceededException;
import com.sun.star.io.NotConnectedException;
import com.sun.star.io.XInputStream;
import com.sun.star.io.XSeekable;
/**
* XInputStream interface implementation.
*/
public class MyInputStream implements XSeekable, XInputStream {
/**
* Member properties
*/
private int offset = 0;
private int read = offset;
private byte[] bigbuffer;
/**
* Constructor
*/
public MyInputStream() {
}
// XSeekable. Makes it possible to seek to a certain position within a stream.
/**
* Returns the length of the stream.
*
*@return long The length of the storage medium on which the stream works.
*/
public synchronized long getLength()
throws com.sun.star.io.IOException,com.sun.star.uno.RuntimeException {
if ( bigbuffer != null ) {
return bigbuffer.length - offset;
} else {
return 0;
}
}
/**
* Returns the current offset of the stream.
*
*@return long The current offset in this stream.
*/
public synchronized long getPosition()
throws com.sun.star.io.IOException,com.sun.star.uno.RuntimeException {
return read - offset ;
}
/**
* Changes the seek pointer to a new location relative to the beginning of the stream.
*
*@param long
*/
public synchronized void seek(long p0)
throws IllegalArgumentException, com.sun.star.io.IOException,
com.sun.star.uno.RuntimeException {
if( bigbuffer != null ) {
p0 +=offset;
read = ( int ) p0;
if( read < offset || read > bigbuffer.length )
throw new IllegalArgumentException();
}
}
// XInputStream. This is the basic interface to read data from a stream.
/**
* States how many bytes can be read or skipped without blocking.
*
*@return int If not available, then returned 0
*/
public synchronized int available()
throws NotConnectedException, com.sun.star.io.IOException,
com.sun.star.uno.RuntimeException {
if( bigbuffer != null )
return ( bigbuffer.length - read );
else
return 0;
}
/**
* Closes the stream. .
*/
public void closeInput()
throws NotConnectedException,com.sun.star.io.IOException,
com.sun.star.uno.RuntimeException {
read = -1;
}
/**
* Reads the specified number of bytes in the given sequence.
*
*@param byte[][]
*@param int
*@return int
*/
public synchronized int readBytes(byte[][] p0, int p1)
throws NotConnectedException, BufferSizeExceededException,
com.sun.star.io.IOException, com.sun.star.uno.RuntimeException {
if( bigbuffer != null ) {
if( read == -1 )
return 0;
int i = 0;
int available;
if ( p1 > bigbuffer.length - read )
available = bigbuffer.length - read;
else
available = p1;
p0[0] = new byte[p1];
while( available != 0 ) {
p0[0][i++] = bigbuffer[read++];
--available;
}
return i;
} else {
p0[0] = new byte[0];
return 0;
}
}
/**
* Reads the available number of bytes at maximum nMaxBytesToRead .
* This method blocks the thread until at least one byte is available.
*
*@param byte[][]
*@param int
*@return int
*/
public synchronized int readSomeBytes(byte[][] p0, int p1)
throws NotConnectedException,
BufferSizeExceededException,
com.sun.star.io.IOException,
com.sun.star.uno.RuntimeException {
return readBytes( p0,p1 );
}
/**
* Skips the next nBytesToSkip bytes (must be positive).
* It is up to the implementation whether this method is blocking the thread or not.
*
*@param int
*/
public synchronized void skipBytes(int p0)
throws NotConnectedException, BufferSizeExceededException,
com.sun.star.io.IOException, com.sun.star.uno.RuntimeException {
read += p0;
if( read > bigbuffer.length )
read = bigbuffer.length;
if( read < offset )
read = offset;
}
}
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