/* ======================================================================
   Parts Copyright 2006 University of Leeds, Oxford University, University of the Highlands and Islands.

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.

====================================================================== */

package org.bodington.assessment;

import java.math.BigInteger;
import java.math.BigDecimal;
import java.util.Enumeration;
import java.io.*;

import org.bodington.sqldatabase.*;
import org.bodington.database.*;
import org.bodington.server.*;
import org.bodington.text.BigString;

public class McqQuestion extends org.bodington.sqldatabase.SqlPersistentObject
	{
	private static final byte FLAGS_TYPE_MASK = 7;
	private static final byte FLAGS_TYPE_REV_MASK = (byte)0xf8;
        
	public static final byte TYPE_MULTIPLE_TRUE = 0;
	public static final byte TYPE_ONE_TRUE = 1;
	public static final byte TYPE_MULTIPLE_TF = 2;
	public static final byte TYPE_MULTIPLE_TFD = 3;
	public static final byte TYPE_STRICT_MULTIPLE_TF = 4;
	
	private PrimaryKey mcq_question_id;
	private PrimaryKey resource_id;
	private PrimaryKey question_big_string_id;
	private PrimaryKey explanation_big_string_id;
	private PrimaryKey statement_a_big_string_id;
	private PrimaryKey statement_b_big_string_id;
	private PrimaryKey statement_c_big_string_id;
	private PrimaryKey statement_d_big_string_id;
	private PrimaryKey statement_e_big_string_id;
	private int ordinal;
	private byte flags;
	private byte answers;
	
	public static McqQuestion findMcqQuestion( PrimaryKey key )
	    throws BuildingServerException
	    {
	    return (McqQuestion)findPersistentObject( key, "org.bodington.server.assessment.McqQuestion" );
	    }
	
	public static McqQuestion findMcqQuestion( String where )
	    throws BuildingServerException
	    {
	    return (McqQuestion)findPersistentObject( where, "org.bodington.assessment.McqQuestion" );
	    }
	
	public static Enumeration findMcqQuestions( String where )
	    throws BuildingServerException
	    {
	    return findPersistentObjects( where, "org.bodington.assessment.McqQuestion" );
	    }
	
	public static Enumeration findMcqQuestions( String where, String order )
	    throws BuildingServerException
	    {
	    return findPersistentObjects( where, order, "org.bodington.assessment.McqQuestion" );
	    }
	

	
    public PrimaryKey getPrimaryKey()
    	{
        return getMcqQuestionId();
    	}

    public void setPrimaryKey(PrimaryKey key)
    	{
    	setMcqQuestionId( key );
    	}

	
	public PrimaryKey getMcqQuestionId()
		{
		return mcq_question_id;
		}
		
	public void setMcqQuestionId( PrimaryKey id )
		{
		mcq_question_id = id;
		}
		
		
	public PrimaryKey getResourceId()
		{
		return resource_id;
		}

	public void setResourceId( PrimaryKey id )
		{
		resource_id = id;
		}

		
		
	public PrimaryKey getQuestionBigStringId()
		{
		return question_big_string_id;
		}

	public void setQuestionBigStringId( PrimaryKey id )
		{
		question_big_string_id = id;
		setUnsaved();
		}
		
	public String getQuestion()
		throws BuildingServerException
		{
		if ( question_big_string_id == null )
			return null;
		BigString bstr = BigString.findBigString( question_big_string_id );
		if ( bstr == null )
			return null;
		return bstr.getString();
		}
		
	public void setQuestion( String s )
		throws BuildingServerException
		{
		BigString bstr=null;
		if ( question_big_string_id != null )
			bstr = BigString.findBigString( question_big_string_id );
		if ( bstr == null )
			{
			bstr = new BigString();
			bstr.setString( s );
			bstr.save();
			question_big_string_id = bstr.getBigStringId();
			setUnsaved();
			return;
			}

		bstr.setString( s );
		bstr.save();
		}
	
		
	public PrimaryKey getExplanationBigStringId()
		{
		return explanation_big_string_id;
		}

	public void setExplanationBigStringId( PrimaryKey id )
		{
		explanation_big_string_id = id;
		setUnsaved();
		}
		
	public String getExplanation()
		throws BuildingServerException
		{
		if ( explanation_big_string_id == null )
			return null;
		BigString bstr = BigString.findBigString( explanation_big_string_id );
		if ( bstr == null )
			return null;
		return bstr.getString();
		}
		
	public void setExplanation( String s )
		throws BuildingServerException
		{
		BigString bstr=null;
		if ( question_big_string_id != null )
			bstr = BigString.findBigString( explanation_big_string_id );
		if ( bstr == null )
			{
			bstr = new BigString();
			bstr.setString( s );
			bstr.save();
			explanation_big_string_id = bstr.getBigStringId();
			setUnsaved();
			return;
			}

		bstr.setString( s );
		bstr.save();
		}
	


	public PrimaryKey getStatementABigStringId()
		{
		return statement_a_big_string_id;
		}

	public void setStatementABigStringId( PrimaryKey id )
		{
		statement_a_big_string_id = id;
		setUnsaved();
		}
		
		
	public PrimaryKey getStatementBBigStringId()
		{
		return statement_b_big_string_id;
		}

	public void setStatementBBigStringId( PrimaryKey id )
		{
		statement_b_big_string_id = id;
		setUnsaved();
		}
		
		
	public PrimaryKey getStatementCBigStringId()
		{
		return statement_c_big_string_id;
		}

	public void setStatementCBigStringId( PrimaryKey id )
		{
		statement_c_big_string_id = id;
		setUnsaved();
		}
		
		
	public PrimaryKey getStatementDBigStringId()
		{
		return statement_d_big_string_id;
		}

	public void setStatementDBigStringId( PrimaryKey id )
		{
		statement_d_big_string_id = id;
		setUnsaved();
		}
		
		
	public PrimaryKey getStatementEBigStringId()
		{
		return statement_e_big_string_id;
		}

	public void setStatementEBigStringId( PrimaryKey id )
		{
		statement_e_big_string_id = id;
		setUnsaved();
		}
		

	public PrimaryKey getStatementBigStringId( int n )
		throws BuildingServerException
		{
		switch ( n )
			{
			case 0:
				return getStatementABigStringId();
			case 1:
				return getStatementBBigStringId();
			case 2:
				return getStatementCBigStringId();
			case 3:
				return getStatementDBigStringId();
			case 4:
				return getStatementEBigStringId();
			}
			
		return null;
		}
		
	public String getStatement( int n )
		throws BuildingServerException
		{
		if ( n<0 || n>4 )
			return null;
			
		PrimaryKey big_string_id = null;
		switch ( n )
			{
			case 0:
				big_string_id = getStatementABigStringId();
				break;
			case 1:
				big_string_id = getStatementBBigStringId();
				break;
			case 2:
				big_string_id = getStatementCBigStringId();
				break;
			case 3:
				big_string_id = getStatementDBigStringId();
				break;
			case 4:
				big_string_id = getStatementEBigStringId();
				break;
			}
			
		if ( big_string_id == null )
			return null;
			
		BigString bs = BigString.findBigString( big_string_id );
		if ( bs == null )
			return null;
		
		return bs.toString();
		}
		
	public void setStatement( int n, String s )
		throws BuildingServerException
		{
		if ( n<0 || n>4 )
			return;
		
		PrimaryKey big_string_id = null;
		switch ( n )
			{
			case 0:
				big_string_id = getStatementABigStringId();
				break;
			case 1:
				big_string_id = getStatementBBigStringId();
				break;
			case 2:
				big_string_id = getStatementCBigStringId();
				break;
			case 3:
				big_string_id = getStatementDBigStringId();
				break;
			case 4:
				big_string_id = getStatementEBigStringId();
				break;
			}
			
		BigString bs=null;
		
		if ( big_string_id !=null )
			bs = BigString.findBigString( big_string_id );
		
		if ( bs == null )
			{
			bs = new BigString();
			bs.setString( s );
			bs.save();
			switch ( n )
				{
				case 0:
					setStatementABigStringId( bs.getBigStringId() );
					break;
				case 1:
					setStatementBBigStringId( bs.getBigStringId() );
					break;
				case 2:
					setStatementCBigStringId( bs.getBigStringId() );
					break;
				case 3:
					setStatementDBigStringId( bs.getBigStringId() );
					break;
				case 4:
					setStatementEBigStringId( bs.getBigStringId() );
					break;
				}
			setUnsaved();
			return;
			}
		

		bs.setString( s );
		bs.save();
		}
	

		
	public int getOrdinal()
		{
		return ordinal;
		}
		
	public void setOrdinal( int o )
		{
		if ( o==ordinal )
			return;
		ordinal = o;
		setUnsaved();
		}
		
		
	public byte getFlags()
		{
		return flags;
		}
		
	public void setFlags( byte b )
		{
		if ( b==flags )
			return;
		flags = b;
		setUnsaved();
		}

	public byte getQuestionType()
		{
		return (byte)(getFlags() & FLAGS_TYPE_MASK);
		}
        
	public void setQuestionType( byte t )
		{
		if ( getQuestionType() == t )
			return;
		setFlags( (byte)((getFlags() & FLAGS_TYPE_REV_MASK) | t) );
		}


	public byte getAnswers()
		{
		return answers;
		}
		
	public void setAnswers( byte b )
		{
		if ( answers == b )
			return;
		answers = b;
		setUnsaved();
		}
		
	public boolean getAnswer( int n )
		{
		if ( n<0 || n>4 ) return false;
		return (answers & (1 << n)) != 0;
		}
		
	public void setAnswer( int n, boolean answer )
		{
		if ( n<0 || n>4 ) return;
		if ( answer == getAnswer( n ) )
			return;
			
		setAnswers( (byte)(getAnswers() ^ (1 << n)) );
		}



    public int getMaximumMark()
        {
        int m=0;

        if ( getQuestionType() == TYPE_ONE_TRUE || getQuestionType() == TYPE_MULTIPLE_TRUE )
        {
            for ( int i=0; i<5; i++ )
                if ( getAnswer( i ) )
                    m++;
        }
        else
            m=5;
        
        return m;
        }

        public void exportXmlTf( PrintWriter xmlout, boolean dontknow, boolean strict )
            throws IOException, BuildingServerException
        {
            int j;
            
            String ident = "pk" + getPrimaryKey() +"tfd";
            xmlout.print( "\t<item ident=\"" );
            xmlout.print( ident );
            xmlout.print( "\">" );
            xmlout.println();
            
            xmlout.println( "\t\t<itemmetadata>" );
            xmlout.println( "\t\t\t<qmd_computerscored>Yes</qmd_computerscored>" );
            xmlout.println( "\t\t\t<qmd_feedbackpermitted>No</qmd_feedbackpermitted>" );
            xmlout.println( "\t\t\t<qmd_hintspermitted>No</qmd_hintspermitted>" );
            xmlout.println( "\t\t\t<qmd_itemtype>Logical Identifier</qmd_itemtype>" );
            xmlout.println( "\t\t\t<qmd_maximumscore>5</qmd_maximumscore>" );
            xmlout.println( "\t\t\t<qmd_renderingtype>Choice</qmd_renderingtype>" );
            xmlout.println( "\t\t\t<qmd_responsetype>Multiple</qmd_responsetype>" );
            xmlout.println( "\t\t\t<qmd_scoringpermitted>No</qmd_scoringpermitted>" );
            xmlout.println( "\t\t\t<qmd_toolvendor>Bodington System</qmd_toolvendor>" );
            xmlout.println( "\t\t</itemmetadata>" );
            xmlout.println();
            
            xmlout.println("\t\t<presentation label='"+ident+"'>");
            xmlout.println("\t\t\t<response_grp ident='"+ident+"' rcardinality='Multiple' rtiming='No'>");
            xmlout.println();
            
            xmlout.println("\t\t\t\t<material>");
            xmlout.print("\t\t\t\t\t<mattext texttype='text/html'>");
            xmlout.print("<![CDATA[");
            xmlout.print(getQuestion());
            xmlout.println("]]></mattext>");
            xmlout.println("\t\t\t\t</material>");
            xmlout.println();
            
            xmlout.println("\t\t\t\t<render_choice shuffle='No'>");
            xmlout.println();
            
            
            
            for (j=0; j<5; j++)
            {
                xmlout.print("\t\t\t\t\t<response_label ident='");
                xmlout.print((char)('A'+j));
                if ( dontknow )
                    xmlout.println("' match_max='1' match_group='T,F,D,U'>");
                else
                    xmlout.println("' match_max='1' match_group='T,F,U'>");
                xmlout.println("\t\t\t\t\t\t<material>");
                xmlout.print( "\t\t\t\t\t\t\t<mattext texttype='text/html'><![CDATA[" );
                xmlout.print( getStatement( j ) );
                xmlout.print( "]]></mattext>" );
                xmlout.println("\t\t\t\t\t\t</material>");
                xmlout.println("\t\t\t\t\t</response_label>");
                xmlout.println();
            }
            
            xmlout.println("\t\t\t\t\t<response_label ident='T'>");
            xmlout.println("\t\t\t\t\t\t<material>");
            xmlout.println("\t\t\t\t\t\t\t<mattext  texttype='text/html'><![CDATA[T]]></mattext>");
            xmlout.println("\t\t\t\t\t\t</material>");
            xmlout.println("\t\t\t\t\t</response_label>");
            xmlout.println();
            
            xmlout.println("\t\t\t\t\t<response_label ident='F'>");
            xmlout.println("\t\t\t\t\t\t<material>");
            xmlout.println("\t\t\t\t\t\t\t<mattext  texttype='text/html'><![CDATA[F]]></mattext>");
            xmlout.println("\t\t\t\t\t\t</material>");
            xmlout.println("\t\t\t\t\t</response_label>");
            xmlout.println();
            
            if ( dontknow )
            {
                xmlout.println("\t\t\t\t\t<response_label ident='D'>");
                xmlout.println("\t\t\t\t\t\t<material>");
                xmlout.println("\t\t\t\t\t\t\t<mattext  texttype='text/html'><![CDATA[D]]></mattext>");
                xmlout.println("\t\t\t\t\t\t</material>");
                xmlout.println("\t\t\t\t\t</response_label>");
                xmlout.println();
            }
            
            xmlout.println("\t\t\t\t\t<response_label ident='U'>");
            xmlout.println("\t\t\t\t\t\t<material>");
            xmlout.println("\t\t\t\t\t\t\t<mattext  texttype='text/html'><![CDATA[U]]></mattext>");
            xmlout.println("\t\t\t\t\t\t</material>");
            xmlout.println("\t\t\t\t\t</response_label>");
            xmlout.println();
            
            xmlout.println("\t\t\t\t</render_choice>");
            xmlout.println("\t\t\t</response_grp>");
            xmlout.println("\t\t</presentation>");
            xmlout.println();
            
            xmlout.println("\t\t<resprocessing>");
            
            xmlout.println("\t\t\t<outcomes>");
            xmlout.println("\t\t\t\t<decvar varname='SCORE' vartype='Integer' defaultval='0' minvalue='0' maxvalue='5'/>");
            xmlout.println("\t\t\t</outcomes>");
            
            /* can't see the point of this respcondition because the next
             * ones can be programmed to always provide the feedback */
            /*
            xmlout.println("\t\t\t<respcondition title='Right' continue='Yes'>");
            xmlout.println("\t\t\t\t<conditionvar>");
            xmlout.println("\t\t\t\t\t<and>");
            for (j=0; j<5; j++)
            {
                xmlout.print("\t\t\t\t\t\t<varsubset respident='"+ident+"'>");
                xmlout.print((char)('A'+j)+",");
                if (getAnswer(j)) xmlout.print("T"); else xmlout.print("F");
                xmlout.println("</varsubset>");
            }
            xmlout.println("\t\t\t\t\t</and>");
            xmlout.println("\t\t\t\t</conditionvar>");
            xmlout.println("\t\t\t\t<displayfeedback feedbacktype='Response' linkrefid='"+ident+".Response'/>");
            xmlout.println("\t\t\t</respcondition>");
             **/
        
            if ( strict )
            {
                // add 5 marks if all statements correctly selected
                xmlout.println("\t\t\t<respcondition title='Right' continue='Yes'>");
                xmlout.println("\t\t\t\t<conditionvar>");
                xmlout.println("\t\t\t\t\t<and>");
                for (j=0; j<5; j++)
                {
                    xmlout.print("\t\t\t\t\t\t<varsubset respident='"+ident+"'>");
                    xmlout.print((char)('A'+j)+",");
                    if (getAnswer(j)) xmlout.print("T"); else xmlout.print("F");
                    xmlout.println("</varsubset>");
                }
                xmlout.println("\t\t\t\t\t</and>");
                xmlout.println("\t\t\t\t</conditionvar>");
                xmlout.println("\t\t\t\t<setvar action='Add' varname='SCORE'>5</setvar>");
                xmlout.println("\t\t\t</respcondition>");
            }
            else
            {
                // add one mark for each correct statement
                for (j=0; j<5; j++)
                {
                    xmlout.println("\t\t\t<respcondition title='"+(char)('A'+j)+"R' continue='Yes'>");
                    xmlout.println("\t\t\t\t<conditionvar>");
                    xmlout.print("\t\t\t\t\t\t<varsubset respident='"+ident+"'>");
                    xmlout.print((char)('A'+j)+",");
                    if (getAnswer(j)) xmlout.print("T"); else xmlout.print("F");
                    xmlout.println("</varsubset>");
                    xmlout.println("\t\t\t\t</conditionvar>");
                    xmlout.println("\t\t\t\t<setvar action='Add' varname='SCORE'>1</setvar>");
                    xmlout.println("\t\t\t</respcondition>");
                    xmlout.println();
                }
                // negative marking needs another set of conditions....
                // but can't go totally -ve because of minvalue attribute on SCORE
                if ( dontknow )
                {
                    for (j=0; j<5; j++)
                    {
                        xmlout.println("\t\t\t<respcondition title='"+(char)('A'+j)+"R' continue='Yes'>");
                        xmlout.println("\t\t\t\t<conditionvar>");
                        xmlout.print("\t\t\t\t\t\t<varsubset respident='"+ident+"'>");
                        xmlout.print((char)('A'+j)+",");
                        if (getAnswer(j)) xmlout.print("F"); else xmlout.print("T");
                        xmlout.println("</varsubset>");
                        xmlout.println("\t\t\t\t</conditionvar>");
                        xmlout.println("\t\t\t\t<setvar action='Add' varname='SCORE'>-1</setvar>");
                        xmlout.println("\t\t\t</respcondition>");
                        xmlout.println();
                    }
                }
            }

            xmlout.println("\t\t\t<respcondition title='Feedback' continue='Yes'>");
            xmlout.println("\t\t\t\t<conditionvar>");
            xmlout.println("\t\t\t\t\t<other/>");
            xmlout.println("\t\t\t\t</conditionvar>");
            xmlout.println("\t\t\t\t<displayfeedback feedbacktype='Response' linkrefid='"+ident+".Response'/>");
            xmlout.println("\t\t\t</respcondition>");
            xmlout.println();
            
            
            xmlout.println("\t\t</resprocessing>");
            xmlout.println();
            
            xmlout.println("\t\t<itemfeedback ident='"+ident+".Response' view='Candidate'>");
            xmlout.println("\t\t\t<material>");
            xmlout.println("\t\t\t\t<mattext texttype='text/html'>");
            xmlout.print("\t\t\t\t\t<![CDATA[");
            xmlout.print(getExplanation());
            xmlout.println("]]>");
            xmlout.println("\t\t\t\t</mattext>");
            xmlout.println("\t\t\t</material>");
            xmlout.println("\t\t</itemfeedback>");
            xmlout.println();
            
            xmlout.println("\t</item>");
        }
        
        
	public void exportXml( PrintWriter xmlout )
	    throws IOException, BuildingServerException
	    {
	    int j;
            byte type = getQuestionType();
            
            if ( type == TYPE_MULTIPLE_TF )
                { exportXmlTf( xmlout, false, false ); return; }
            
            if ( type == TYPE_STRICT_MULTIPLE_TF )
                { exportXmlTf( xmlout, true, true ); return; }
            
            if ( type == TYPE_MULTIPLE_TFD )
                { exportXmlTf( xmlout, true, false ); return; }
            
        String ident = "pk" + getPrimaryKey() + ((type==TYPE_ONE_TRUE)?"mcq":"mrq");
        String card = (type==TYPE_ONE_TRUE)?"Single":"Multiple";
        String maxr = (type==TYPE_ONE_TRUE)?"1":"5";

        xmlout.print( "\t<item ident=\"" );
        xmlout.print( ident );
        xmlout.print( "\">" );
        xmlout.println();

        xmlout.println( "\t\t<itemmetadata>" );
        xmlout.println( "\t\t\t<qmd_computerscored>Yes</qmd_computerscored>" );
        xmlout.println( "\t\t\t<qmd_feedbackpermitted>No</qmd_feedbackpermitted>" );
        xmlout.println( "\t\t\t<qmd_hintspermitted>No</qmd_hintspermitted>" );
        xmlout.println( "\t\t\t<qmd_itemtype>Logical Identifier</qmd_itemtype>" );
        xmlout.print( "\t\t\t<qmd_maximumscore>" );
        xmlout.print( getMaximumMark() );
        xmlout.println( "</qmd_maximumscore>" );
        
        xmlout.println( "\t\t\t<qmd_renderingtype>Choice</qmd_renderingtype>" );
        xmlout.print( "\t\t\t<qmd_responsetype>" );
        xmlout.print( card );
        xmlout.println( "</qmd_responsetype>" );
        
        xmlout.println( "\t\t\t<qmd_scoringpermitted>No</qmd_scoringpermitted>" );
        xmlout.println( "\t\t\t<qmd_toolvendor>Bodington System</qmd_toolvendor>" );
        xmlout.println( "\t\t</itemmetadata>" );
                
        xmlout.println( "\t\t<presentation>" );
            xmlout.println( "\t\t\t<material>" );
                xmlout.print( "\t\t\t\t<mattext texttype=\"text/html\"><![CDATA[" );
                xmlout.print( getQuestion() );
                //if ( broken_composite )
                //    {
                //    xmlout.println();
                //    xmlout.println( "<P>(The next question contains the comment box for this question.)</P>" );
                //    }
                xmlout.print( "]]></mattext>" );
                xmlout.println();
            xmlout.println( "\t\t\t</material>" );
            xmlout.print( "\t\t\t<response_lid ident=\"1\" rcardinality=\"" );
            xmlout.print( card );
            //xmlout.print( "\" minnumber=\"1\" maxnumber=\"" );
            //xmlout.print( maxr );
            xmlout.println( "\">" );

                xmlout.println( "\t\t\t\t<render_choice shuffle=\"No\">" );
                        
        for ( j=0; j<5; j++ )
            {
            xmlout.print( "\t\t\t\t\t<response_label ident=\"" );
            xmlout.print( (char)('A'+j) );
            xmlout.print( "\">" );
            xmlout.println();
                        
            xmlout.println( "\t\t\t\t\t\t<material>" );

                xmlout.print( "\t\t\t\t\t\t\t<mattext texttype=\"text/html\"><![CDATA[" );
                xmlout.print( getStatement( j ) );
                xmlout.print( "]]></mattext>" );
                xmlout.println();

            xmlout.println( "\t\t\t\t\t\t</material>" );
            xmlout.println( "\t\t\t\t\t</response_label>" );
            }

                xmlout.println( "\t\t\t\t</render_choice>" );
            xmlout.println( "\t\t\t</response_lid>" );
        xmlout.println( "\t\t</presentation>" );

        xmlout.println( "\t\t<resprocessing>" );
            xmlout.println( "\t\t\t<outcomes>" );
                xmlout.println( "\t\t\t\t<decvar varname=\"SCORE\" vartype=\"Integer\" minvalue=\"0\" maxvalue=\"5\" defaultval=\"0\"/>" );
            xmlout.println( "\t\t\t</outcomes>" );
            
            for ( j=0; j<5; j++ )
                {
                // need a response condition for each statement that is true
                // and for all 5 statements if there could be negative marking
                if ( getAnswer( j ) || type!=TYPE_ONE_TRUE )
                    {
                    xmlout.print( "\t\t\t<respcondition title=\"" );
                    xmlout.print( (char)('A'+j) );
                    xmlout.println( "\" continue=\"Yes\">" );
                        xmlout.println( "\t\t\t\t<conditionvar>" );
                            xmlout.print( "\t\t\t\t\t<varequal respident=\"1\">" );
                            xmlout.print( (char)('A'+j) );
                            xmlout.println( "</varequal>" );
                        xmlout.println( "\t\t\t\t</conditionvar>" );

                    if ( getAnswer( j ) )
                        xmlout.println( "\t\t\t\t<setvar action=\"Add\" varname=\"SCORE\">1</setvar>" );
                    else
                        xmlout.println( "\t\t\t\t<setvar action=\"Add\" varname=\"SCORE\">-1</setvar>" );
                    xmlout.println( "\t\t\t</respcondition>" );
                    }
                }

                    xmlout.print( "\t\t\t<respcondition title=\"Other\">" );
                        xmlout.println( "\t\t\t\t<conditionvar>" );
                            xmlout.print( "\t\t\t\t\t<other/>" );
                        xmlout.println( "\t\t\t\t</conditionvar>" );
                        xmlout.println( "\t\t\t\t<displayfeedback linkrefid=\"explanation\" feedbacktype=\"Solution\"/>" );
                    xmlout.println( "\t\t\t</respcondition>" );

                
        xmlout.println( "\t\t</resprocessing>" );
		xmlout.println( "\t\t<itemfeedback ident=\"Explanation\" view=\"Candidate\">" );
		    xmlout.print( "\t\t\t<material><mattext texttype=\"text/html\"><![CDATA[" );
		    xmlout.print( getExplanation() );
            xmlout.print( "]]></mattext></material>" );
            xmlout.println();
		xmlout.println( "\t\t</itemfeedback>" );

        
        
        xmlout.print( "\t</item>" );
        xmlout.println();
	    }

	    
	    
	}