Bug 148392 Float type fails to be retrieven in scripted datasets
1/ Create a scripted dataset with Float type values, retrive them in the fetch dataset's method configure the output columns and assign them the Float type => result preview fails to show the float columns values 2/ Set the columns' type as Any => the result preview shows normally 3/ Create a chart based on the previous dataset configure the databindings setting float as the said columns type (the dataset's type is Any) => the series fails to appear in the graph (see error in footer) 4/ Change the data bindings for the said columns as Any and use the series fromatting to fix it => the series appears normally
core/org.eclipse.birt.core/src/org/eclipse/birt/core/data/DataTypeUtil.java
else if ( source instanceof Date )
		{
			long longValue = ( (Date) source ).getTime( );
			return new BigDecimal( longValue );
		}
		else if ( source instanceof Double )
		{
			Double d2 = (Double) source;
			if ( d2.isNaN( ) || d2.isInfinite( ) )
			{
				throw new BirtException( pluginId,
						ResourceConstants.CONVERT_FAILS,
						new Object[]{
								d2.isNaN( ) ? "NaN" : "infinite value",
								"BigDecimal"
						},
						resourceBundle );
			}
			return new BigDecimal( d2.doubleValue( ) );
		}
		else if ( source instanceof String )
		{
			try
			{
				return new BigDecimal( (String) source );
			}
			catch ( NumberFormatException e )
			{
				throw new BirtException( pluginId,
						ResourceConstants.CONVERT_FAILS,