Bug 151535 Parameters are invisable in Joint Dataset
Trying to use "Joint Dataset" combined with parameters within underlaying Data-Sets (neccessary to achive a filtering where clause for a DateTime Field) Parameter editing ( e.g. in Chart designer) do not show the entire parameter. As specified it should show and let to edit a combination of both underlaying datasets' parameters.
data/org.eclipse.birt.report.data.adapter/src/org/eclipse/birt/report/data/adapter/internal/adapter/DataAdapterUtil.java
{
	private static final String PARAMS_PREFIX = "params";
	
	/**
	 * Adapts common base data source properties
	 */
	public static void adaptBaseDataSource( DataSourceHandle source, BaseDataSourceDesign dest )
	{
		dest.setBeforeOpenScript( source.getBeforeOpen( ) );
		dest.setAfterOpenScript( source.getAfterOpen( ) );
		dest.setBeforeCloseScript( source.getBeforeClose( ) );
		dest.setAfterCloseScript( source.getAfterClose( ) );
	}
	/**
	 * Adapts base data set properties
	 */
	public static void adaptBaseDataSet( DataSetHandle modelDataSet,
			BaseDataSetDesign dteDataSet ) throws BirtException
	{
		if ( ( !( modelDataSet instanceof JointDataSetHandle ) )
				&& modelDataSet.getDataSource( ) == null )
		{
			throw new AdapterException( ResourceConstants.DATASOURCE_NULL_ERROR );
		}
		
		if ( !( modelDataSet instanceof JointDataSetHandle ) )