/*********************************************************************
*
* Copyright (C) 2002 Andrew Khan
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
***************************************************************************/
package jxl.read.biff;
import java.util.ArrayList;
import jxl.common.Logger;
import jxl.biff.IntegerHelper;
import jxl.biff.Type;
/**
* A container for the raw record data within a biff file
*/
public final class Record
{
/**
* The logger
*/
private static final Logger logger = Logger.getLogger(Record.class);
/**
* The excel biff code
*/
private int code;
/**
* The data type
*/
private Type type;
/**
* The length of this record
*/
private int length;
/**
* A pointer to the beginning of the actual data
*/
private int dataPos;
/**
* A handle to the excel 97 file
*/
private File file;
/**
* The raw data within this record
*/
private byte[] data;
/**
* Any continue records
*/
private ArrayList continueRecords;
/**
* Constructor
*
* @param offset the offset in the raw file
* @param f the excel 97 biff file
* @param d the data record
*/
Record(byte[] d, int offset, File f)
{
code = IntegerHelper.getInt(d[offset], d[offset + 1]);
length = IntegerHelper.getInt(d[offset + 2], d[offset + 3]);
file = f;
file.skip(4);
dataPos = f.getPos();
file.skip(length);
type = Type.getType(code);
}
/**
* Gets the biff type
*
* @return the biff type
*/
public Type getType()
{
return type;
}
/**
* Gets the length of the record
*
* @return the length of the record
*/
public int getLength()
{
return length;
}
/**
* Gets the data portion of the record
*
* @return the data portion of the record
*/
public byte[] getData()
{
if (data == null)
{
data = file.read(dataPos, length);
}
// copy in any data from the continue records
if (continueRecords != null)
{
int size = 0;
byte[][] contData = new byte[continueRecords.size()][];
for (int i = 0; i < continueRecords.size(); i++)
{
Record r = (Record) continueRecords.get(i);
contData[i] = r.getData();
byte[] d2 = contData[i];
size += d2.length;
}
byte[] d3 = new byte[data.length + size];
System.arraycopy(data, 0, d3, 0, data.length);
int pos = data.length;
for (int i = 0; i < contData.length; i++)
{
byte[] d2 = contData[i];
System.arraycopy(d2, 0, d3, pos, d2.length);
pos += d2.length;
}
data = d3;
}
return data;
}
/**
* The excel 97 code
*
* @return the excel code
*/
public int getCode()
{
return code;
}
/**
* In the case of dodgy records, this method may be called to forcibly
* set the type in order to continue processing
*
* @param t the forcibly overridden type
*/
void setType(Type t)
{
type = t;
}
/**
* Adds a continue record to this data
*
* @param d the continue record
*/
public void addContinueRecord(Record d)
{
if (continueRecords == null)
{
continueRecords = new ArrayList();
}
continueRecords.add(d);
}
}
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