Bug 131258 NewOdaDataSet is created when drop dataset from data explorer into layout in library
Details: NewOdaDataSet is created when drop dataset from data explorer into layout in library Setp: 1.New a library 2.Create a datasource and dataset 3.Drop dataset from Actual result: A new dataset named NewOdaDataSet is created. Exception result: The dataset is unnecessary to be created
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/palette/BasePaletteFactory.java
{
		if ( !( str instanceof String ) )
		{
			throw new Error( "Don't support the other type expect String" ); 
		}
		String template = (String) str;
		AbstractToolHandleExtends preHandle = null;
		if ( IReportElementConstants.REPORT_ELEMENT_IMAGE.equalsIgnoreCase( template ) )
		{
			preHandle = new ImageToolExtends( );
		}
		else if ( IReportElementConstants.REPORT_ELEMENT_TABLE.equalsIgnoreCase( template ) )
		{
			preHandle = new TableToolExtends( );
		}
		else if ( IReportElementConstants.REPORT_ELEMENT_TEXT.equalsIgnoreCase( template )
				|| IReportElementConstants.AUTOTEXT_PAGE.equalsIgnoreCase( template )
				|| IReportElementConstants.AUTOTEXT_DATE.equalsIgnoreCase( template )
				|| IReportElementConstants.AUTOTEXT_CREATEDON.equalsIgnoreCase( template )
				|| IReportElementConstants.AUTOTEXT_CREATEDBY.equalsIgnoreCase( template )
				|| IReportElementConstants.AUTOTEXT_FILENAME.equalsIgnoreCase( template )
				|| IReportElementConstants.AUTOTEXT_LASTPRINTED.equalsIgnoreCase( template )
				|| IReportElementConstants.AUTOTEXT_PAGEXOFY.equalsIgnoreCase( template ) )
		{
			preHandle = new TextToolExtends( );
		}
		else if ( IReportElementConstants.REPORT_ELEMENT_TEXTDATA.equalsIgnoreCase( template ) )
		{
			preHandle = new TextDataToolExtends( );
		}