Bug 168305 IsHostPage doesn't work for birt:report tag.[0603]
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/taglib/ReportTag.java
* 
	 * @param handle
	 * @param field
	 * @param value
	 * @return
	 * @throws Exception
	 */
	private Object getParameterValue( ScalarParameterHandle handle,
			ParameterField field, String value ) throws Exception
	{
		
		String dataType = handle.getDataType( );
		
		if ( DesignChoiceConstants.PARAM_TYPE_STRING
				.equalsIgnoreCase( dataType ) )
		{
			return value;
		}
		
		String pattern = field.getPattern( );
		if ( pattern == null || pattern.length( ) <= 0 )
		{
			pattern = handle.getPattern( );
		}
		return DataUtil.validate( handle.getDataType( ), pattern, value,
				this.locale, field.isLocale( ) );
	}
	/**
	 * Returns Report Service Object
	 *