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/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2002 The Apache Software Foundation. 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. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" and
* "Apache POI" must not be used to endorse or promote products
* derived from this software without prior written permission. For
* written permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* "Apache POI", nor may "Apache" appear in their name, without
* prior written permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 APACHE SOFTWARE FOUNDATION OR
* ITS 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
package org.apache.poi.poifs.storage;
import org.apache.poi.poifs.common.POIFSConstants;
import java.io.*;
/**
* A big block created from an InputStream, holding the raw data
*
* @author Marc Johnson (mjohnson at apache dot org
*/
public class RawDataBlock
implements ListManagedBlock
{
private byte[] _data;
private boolean _eof;
/**
* Constructor RawDataBlock
*
* @param stream the InputStream from which the data will be read
*
* @exception IOException on I/O errors, and if an insufficient
* amount of data is read
*/
public RawDataBlock(final InputStream stream)
throws IOException
{
_data = new byte[ POIFSConstants.BIG_BLOCK_SIZE ];
int count = stream.read(_data);
if (count == -1)
{
_eof = true;
}
else if (count != POIFSConstants.BIG_BLOCK_SIZE)
{
String type = " byte" + ((count == 1) ? ("")
: ("s"));
throw new IOException("Unable to read entire block; " + count
+ type + " read; expected "
+ POIFSConstants.BIG_BLOCK_SIZE + " bytes");
}
else
{
_eof = false;
}
}
/**
* When we read the data, did we hit end of file?
*
* @return true if no data was read because we were at the end of
* the file, else false
*
* @exception IOException
*/
public boolean eof()
throws IOException
{
return _eof;
}
/* ********** START implementation of ListManagedBlock ********** */
/**
* Get the data from the block
*
* @return the block's data as a byte array
*
* @exception IOException if there is no data
*/
public byte [] getData()
throws IOException
{
if (eof())
{
throw new IOException("Cannot return empty data");
}
return _data;
}
/* ********** END implementation of ListManagedBlock ********** */
} // end public class RawDataBlock
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