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.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/adapter/ModelDteApiAdapter.java
JoinConditionHandle jc = null;
		
		while( it.hasNext( ) )
		{
			jc = (JoinConditionHandle)it.next( );
			joinConditions.add( new JoinCondition( new ScriptExpression( jc.getLeftExpression( )), new ScriptExpression(jc.getRightExpression( )),toDteJoinOperator(jc.getOperator( )))) ;
		}
		
		int joinType = toDteJoinType(jc.getJoinType( ));
		
		IBaseDataSetEventHandler eventHandler = new DataSetScriptExecutor(
				handle, context );
		JointDataSetDesign dteDataSet = new JointDataSetDesign( handle.getQualifiedName( ),
				jc.getLeftDataSet( ),
				jc.getRightDataSet( ),
				joinType,
				joinConditions );
		dteDataSet.setEventHandler( eventHandler );
		
		adaptBaseDataSet( handle, dteDataSet );
		return dteDataSet;
	}
	private int toDteJoinOperator( String operator )
	{
		if( operator.equals( DesignChoiceConstants.JOIN_OPERATOR_EQALS ))
			return IJoinCondition.OP_EQ;
		return -1;
	}
	
	private int toDteJoinType ( String joinType )