Bug 214572 Implement IAggregationCellViewProvider for crosstab/chart integration
This interface implements the model logic for the designer UI, when the users design a crosstab with charts. Note that it is independent from the multi-view feature. /** * Return the name of this view */ String getViewName( ); // this should simply return "chart" /** * Returns if the given aggregation cell matches this view */ boolean matchView( AggregationCellHandle cell ); Returns true if chart is supported in this type of aggregation cell /** * Switches given aggregation cell to this view */ void switchView( AggregationCellHandle cell ); create a chart inside the aggregation cell (and remove the data elements). This method is called when the UI tries to switch the cell contents from data element to chart. /** * Restores given aggregation cell to previous view */ void restoreView( AggregationCellHandle cell );
chart/org.eclipse.birt.chart.reportitem.ui/src/org/eclipse/birt/chart/reportitem/ui/ReportDataServiceProvider.java
DateFormat.getInstance( ).parse( expression );
			return DataType.DATE_TIME_LITERAL;
		}
		catch ( ParseException e )
		{
		}
		
		return null;
	}
	/**
	 * Find data type of expression from specified item handle.
	 * 
	 * @param expression
	 *            expression.
	 * @param itemHandle
	 *            specified item handle.
	 * @return an object array, size is two, the first element is a boolean
	 *         object, if its value is <code>true</code> then means the data
	 *         type is found and the second element of array stores the data
	 *         type; if its value is <code>false</code> then means that data
	 *         type is not found.
	 */
	private Object[] findDataType( String expression,
			ReportItemHandle itemHandle )
	{
		Object[] returnObj = new Object[2];
		returnObj[0] = new Boolean( false );
		Iterator iterator = itemHandle.columnBindingsIterator( );
		while ( iterator.hasNext( ) )
		{