Bug 155365 Can not set data type to "date time" when editing "Data Item"
Description: Can not set data type to "date time" when editing "Data Item" Steps to reproduce: 1. Insert a data item to the layout 2. Name it and set the expression to "a = new Date()" 3. Select the data type to date time 4. Press ok Actual result: An Birt Exception is thrown out. Expected result: No NPE thrown out
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/ColumnBindingDialog.java
String dataSetName = inputElement.getDataSet( ).getQualifiedName( );
		if ( StringUtil.isBlank( dataSetName ) )
		{
			dataSetName = null;
		}
		return dataSetName;
	}
	private List groupList = Collections.EMPTY_LIST;
	private String[] groups;
	protected Button btnDel;
	protected Button btnEdit;
	protected Button btnAdd;
	private PropertyHandle getParameterBindingPropertyHandle( )
	{
		return inputElement.getPropertyHandle( ReportItemHandle.PARAM_BINDINGS_PROP );
	}
	/*
	 * Set data for Group List
	 */
	public void setGroupList( List groupList )
	{
		Assert.isNotNull( groupList );
		this.groupList = groupList;
	}
	protected ExpressionProvider expressionProvider;
	public void setExpressionProvider( ExpressionProvider provider )
	{
		expressionProvider = provider;
	}
}