Bug 198504 The same name aggregation should be hint in dialog[0001]
Description: The same name aggregation should be hint in dialog[0001] Step: 1.New a datasource, dataset, table and binding the dataset. 2.New a aggregation column binding on table named aggr1. 3.Drop a aggregation item into table and set the named as aggr1. 4.Click OK Actual result: Pop up an error message said that the name is exist. Expected result: It can hint in dialog when input the same name, but pop up an error dialog
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/dialogs/BindingDialogHelper.java
}
		}
		return argList;
	}
	public void save( ) throws Exception
	{
		if ( txtName.getText( ) != null
				&& txtName.getText( ).trim( ).length( ) > 0 )
		{
			if ( isAggregate( ) )
			{
				saveAggregate( );
			}
			else
			{
				if ( getBinding( ) == null )
				{
					for ( int i = 0; i < DATA_TYPE_CHOICES.length; i++ )
					{
						if ( DATA_TYPE_CHOICES[i].getDisplayName( )
								.equals( cmbType.getText( ) ) )
						{
							newBinding.setDataType( DATA_TYPE_CHOICES[i].getName( ) );
							break;
						}
					}
					this.newBinding.setName( txtName.getText( ) );
					this.newBinding.setDisplayName( txtDisplayName.getText( ) );
					this.newBinding.setExpression( txtExpression.getText( ) );
					this.binding = DEUtil.addColumn( getBindingHolder( ),