Bug 122584 Cascading parameter values can't be displayed properly in html viewer.
Description: Cascading parameter values can't be displayed properly in html viewer. Steps to reproduce: 1. Preview attached design file in html viewer. 2. Click on "change parameter" button in html viewer. 3. Select the first parameter value and expect that the second parameter value in the same cascading parameter group could be displayed, but it is not displayed.
core/org.eclipse.birt.core/src/org/eclipse/birt/core/data/DataTypeUtil.java
long longValue = ( (Date) source ).getTime( );
			return new BigDecimal( longValue );
		}
		else if ( source instanceof Double )
		{
			double doubleValue = ( (Double) source ).doubleValue( );
			return new BigDecimal( doubleValue );
		}
		else if ( source instanceof String )
		{
			try
			{
				return new BigDecimal( (String) source );
			}
			catch ( NumberFormatException e )
			{
				throw new BirtException( pluginId, ResourceConstants.CONVERT_FAILS,
						"BigDecimal", resourceBundle );
			}
		}
		else
			throw new BirtException( pluginId, ResourceConstants.CONVERT_FAILS,
					"BigDecimal", resourceBundle );
	}
	/**
	 * Number -> Boolean
	 * 		0 		-> false
	 * 		others 	-> true
	 * String -> Boolean
	 * 		"true" 	-> true (ignore case)