Bug 201236 Issue about Allow multiple and duplicate values in Layout preview[0705]
Description: Issue about Allow multiple and duplicate values in Layout preview Build number:2.2.1.v20070827 Steps to reproduce: 1. New sample data source and dataset from CUSTOMERS. 2. New a parameter p1, listbox, dynamic, value field COUNTRY, tick on allow duplicate value, tick on allow multiple values. 3. Insert a data item to Layout, set expression as var values=""; for (i=0;i<params["p1"].value.length;i++) values=values+params["p1"].value[i]+"."; values; 4. In Layout, click Preview and select France. Expected result: Display one France. Actual result: Display several France. I tried the same action but preview in Web viewer and extenal html, the result is only one France. Error log:n/a
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/utility/DataUtil.java
* </p>
	 * 
	 * @param source
	 * @param toType
	 * @return
	 * @throws BirtException
	 */
	public static Object convert( Object source, int toType )
			throws BirtException
	{
		if ( source == null )
			return null;
		
		if ( toType == IScalarParameterDefn.TYPE_ANY )
			return source;
		switch ( toType )
		{
			case IScalarParameterDefn.TYPE_INTEGER :
				return DataTypeUtil.toInteger( source );
			case IScalarParameterDefn.TYPE_DECIMAL :
				return DataTypeUtil.toBigDecimal( source );
			case IScalarParameterDefn.TYPE_BOOLEAN :
				return DataTypeUtil.toBoolean( source );
			case IScalarParameterDefn.TYPE_DATE_TIME :
				return DataTypeUtil.toDate( source );
			case IScalarParameterDefn.TYPE_FLOAT :
				return DataTypeUtil.toDouble( source );
			case IScalarParameterDefn.TYPE_STRING :
				return DataTypeUtil.toString( source );
			case IScalarParameterDefn.TYPE_DATE :