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JavaDBF is a Java library for reading and writing XBase files.
There is a newer version: 1.14.1
/*

(C) Copyright 2017 Alberto Fernández 

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 3.0 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, see .

*/
package com.linuxense.javadbf;

import java.io.DataInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.Charset;

/**
 *  Importing data from DBC (compressed DBF) files into data frames.
 *  
 *  Please note that this is the file format used by the Brazilian Ministry of Health (DATASUS), 
 *  and it is not related to the Microsoft FoxPro or CANdb DBC file formats.
 *	DATASUS is the name of the Department of Informatics of Brazilian Health System. 
 *  It is the agency resposible for publishing Brazilian public healthcare data. Besides DATASUS, 
 *  the Brazilian National Agency for Supplementary Health (ANS) also uses this file format for its public data.
 */

public class DBCDATASUSReader extends DBFReader {

	/**
	 * Create a Reader for DBC DATASUS data.
	 * charset is autodetected and deleted records are skipped
	 * @param in the InputStream where the data is read from.
	 */
	
	public DBCDATASUSReader(InputStream in) {
		this(in, null, false);
	}
	/**
	 * Create a Reader for DBC DATASUS data.
	 * charset is autodetected 
	 * @param in the InputStream where the data is read from.
	 * @param showDeletedRows can be used to identify records that have been deleted.
	 */
	public DBCDATASUSReader(InputStream in, boolean showDeletedRows) {
		this(in, null, showDeletedRows);
	}
	/**
	 * Create a Reader for DBC DATASUS data.
	 * Deleted records are skipped
	 * @param in the InputStream where the data is read from.
	 * @param charset charset used to decode field names and field contents. If null, then is autedetected from dbf file
	 */
	public DBCDATASUSReader(InputStream in, Charset charset) {
		this(in, charset, false);
	}
	/**
	 * Create a Reader for DBC DATASUS data.
	 * @param in the InputStream where the data is read from.
	 * @param charset charset used to decode field names and field contents. If null, then is autedetected from dbf file
	 * @param showDeletedRows can be used to identify records that have been deleted.
	 */
	public DBCDATASUSReader(InputStream in, Charset charset, boolean showDeletedRows) {
		super(in, charset, showDeletedRows);
		initDBC();
	}

	private void initDBC() {
		try {
			int uncompressedSize = this.getHeader().numberOfRecords * this.getHeader().recordLength; 
			// Skip CRC
			skip(4);
			this.dataInputStream = new DataInputStream(new DBFExploderInputStream(this.inputStream, uncompressedSize));
			
		} catch (IOException e) {
			throw new DBFException(e);
		}

	}


}