InterchangeFormat.java

/**
 * InterchangeFormat.java
 * @author Fabio G. Cozman 
 * Copyright 1996 - 1999, Fabio G. Cozman,
 *          Carnergie Mellon University, Universidade de Sao Paulo
 * fgcozman@usp.br, http://www.cs.cmu.edu/~fgcozman/home.html
 *
 * The JavaBayes distribution is free software; you can
 * redistribute it and/or modify it under the terms of the GNU General
 * Public License as published by the Free Software Foundation (either
 * version 2 of the License or, at your option, any later version), 
 * provided that this notice and the name of the author appear in all 
 * copies. Upon request to the author, some of the packages in the 
 * JavaBayes distribution can be licensed under the GNU Lesser General
 * Public License as published by the Free Software Foundation (either
 * version 2 of the License, or (at your option) any later version).
 * If you're using the software, please notify fgcozman@usp.br so
 * that you can receive updates and patches. JavaBayes is distributed
 * "as is", 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 General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with the JavaBayes distribution. If not, write to the Free
 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

package InterchangeFormat;

import java.io.*;

public class InterchangeFormat {
    InputStream istream;
    Parsers.XMLBIFv03.XMLBIFv03 xml_bif03;
    Parsers.XMLBIFv02.XMLBIFv02 xml_bif02;
    Parsers.BIFv015.BIFv015 bif015;
    Parsers.BIFv01.BIFv01 bif01;

    // Size of the buffer for reading and resetting streams
    private final static int MARK_READ_LIMIT = 10000;

    public InterchangeFormat() {
    }

    public InterchangeFormat(InputStream is) {
        set_stream(is);
    }

    public void set_stream(InputStream is) {
        istream = new BufferedInputStream(is);
    }
    
    public void CompilationUnit() throws IFException {
        StringBuffer error_messages = new StringBuffer("Error messages\n");
        xml_bif03 = null;
        xml_bif02 = null;
        bif015 = null;
        bif01 = null;
        
        if (istream.markSupported()) {
            istream.mark(MARK_READ_LIMIT);
        }
        else
            error_messages.append("\nNo support for reset operation.");

        xml_bif03 = new Parsers.XMLBIFv03.XMLBIFv03(istream);
        try {
            xml_bif03.CompilationUnit();
            xml_bif03.invert_probability_tables();
        } catch (Throwable e4) { // Catch anything!
            error_messages.append(e4); 
            try { istream.reset();
            } catch (Exception e) { error_messages.append("\n\nReset not allowed!"); }
            error_messages.append("Input stream reset!\n");
        // Note that the following lines are within an enclosing catch block.
        xml_bif02 = new Parsers.XMLBIFv02.XMLBIFv02(istream);
        try {
            xml_bif02.CompilationUnit();
        } catch (Throwable e3) { // Catch anything!
            error_messages.append(e3);
            try { istream.reset();
            } catch (Exception e) {  error_messages.append("\n\nReset not allowed!"); }
            error_messages.append("Input stream reset!\n");
        // Note that the following lines are within an enclosing catch block.
        bif015 = new Parsers.BIFv015.BIFv015(istream);
        try {
            bif015.CompilationUnit(); 
        } catch (Throwable e2) { // Catch anything!
            error_messages.append(e2);
            try { istream.reset();
            } catch (Exception e) {  error_messages.append("\n\nReset not allowed!"); }
            error_messages.append("Input stream reset!\n");
        // Note that the following lines are within an enclosing catch block.
        bif01 = new Parsers.BIFv01.BIFv01(istream);
        try {
            bif01.CompilationUnit();
        } catch (Throwable e1) { // Catch anything!
            error_messages.append(e1);
            throw new IFException( new String(error_messages) );
        } // End bif01
        } // End bif015
        } // End xml_bif02
        } // End xml_bif03
    }

    public IFBayesNet get_ifbn() {
        IFBayesNet ifbn = null;

        if (xml_bif03 != null) ifbn = xml_bif03.get_ifbn();
        if (ifbn != null) return(ifbn);
        else {
        // Note that the following lines are inside an else.
        if (xml_bif02 != null) ifbn = xml_bif02.get_ifbn();
        if (ifbn != null) return(ifbn);
        else {
        // Note that the following lines are inside an else.
        if (bif015 != null) ifbn = bif015.get_ifbn();
        if (ifbn != null) return(ifbn);
        else {
        // Note that the following lines are inside an else.
        if (bif01 != null) ifbn = bif01.get_ifbn();
        if (ifbn != null) return(ifbn);
        } // End of bif01
        } // End of bif015
        } // End of xml_bif02
        return(ifbn);
    }
}