Bug 142430 Available data set should be invisible for dynamic image
Steps to reproduce: 1.New a sample data source and data set with table "PRODUCTLINES" 2.Add a dynamic image, binding with data set 3.Click "Expression Builder" Expected result: Available data set is not listed in Category to avoid user choose it Actual result: Available data set is listed in Category but we didn't support such expression like dataSetRow["image"]
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/ImageBuilder.java
ResourceFileLabelProvider labelProvider = new ResourceFileLabelProvider( );
		ResourceFileContentProvider contentProvider = new ResourceFileContentProvider( IMAGE_TYPES );
		ResourceSelectionValidator validator = new ResourceSelectionValidator( IMAGE_TYPES );
		ResourceFileFolderSelectionDialog dialog = new ResourceFileFolderSelectionDialog( UIUtil.getDefaultShell( ),
				labelProvider,
				contentProvider );
		dialog.setTitle( Messages.getString( "ImageBuilder.BrowserResourceDialog.Title" ) ); 
		dialog.setMessage( Messages.getString( "ImageBuilder.BrowserResourceDialog.Message" ) ); 
		dialog.setValidator( validator );
		dialog.setInput( ReportPlugin.getDefault( ).getResourcePreference( ) );
		if ( dialog.open( ) == Window.OK )
		{
			uriEditor.setText( "\"" + dialog.getPath( ) + "\"" );
		}
	}
	/**
	 * @param value
	 * @return
	 */
	private String removeQuoteString( String value )
	{
		if ( value != null
				&& value.length( ) > 1
				&& value.charAt( 0 ) == '\"'
				&& value.charAt( value.length( ) - 1 ) == '\"' )
		{
			return value.substring( 1, value.length( ) - 1 );
		}
		return value;
	}