JPAContainer在表中添加組件？

Question

我正在尋找如何在我的表中添加組件。我的表使用JPAContainer作爲數據源。我試圖使用addContainerProperty，但不起作用並返回一個異常。

我想這

private final CustomJPAContainer<Curriculum> datasource = new CustomJPAContainer<Curriculum>(Curriculum.class); 

Button btnView = new Button(); 
Table tabela = new Table("",datasource); 
tabela.addContainerProperty("View", Button.class, null); 


//exception 
java.lang.UnsupportedOperationException 
    at com.vaadin.addon.jpacontainer.JPAContainer.addContainerProperty(JPAContainer.java:666) 
    at com.vaadin.ui.AbstractSelect.addContainerProperty(AbstractSelect.java:806) 
    at com.vaadin.ui.Table.addContainerProperty(Table.java:4260) 
    at br.ind.ibg.views.VisualizarCurriculum.buildLayout(VisualizarCurriculum.java:58) 
    at br.ind.ibg.views.VisualizarCurriculum.<init>(VisualizarCurriculum.java:36) 
    at br.ind.ibg.utils.MenuSistema$1.menuSelected(MenuSistema.java:60) 
    at com.vaadin.ui.MenuBar.changeVariables(MenuBar.java:186) 
    at com.vaadin.server.communication.ServerRpcHandler.changeVariables(ServerRpcHandler.java:396) 
    at com.vaadin.server.communication.ServerRpcHandler.handleBurst(ServerRpcHandler.java:221) 
    at com.vaadin.server.communication.ServerRpcHandler.handleRpc(ServerRpcHandler.java:111) 
    at com.vaadin.server.communication.UidlRequestHandler.synchronizedHandleRequest(UidlRequestHandler.java:91) 
    at com.vaadin.server.SynchronizedRequestHandler.handleRequest(SynchronizedRequestHandler.java:37) 
    at com.vaadin.server.VaadinService.handleRequest(VaadinService.java:1382) 
    at com.vaadin.server.VaadinServlet.service(VaadinServlet.java:238) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:727) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) 
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122) 
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170) 
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98) 
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950) 
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408) 
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040) 
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607) 
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:313) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
    at java.lang.Thread.run(Thread.java:724) 

任何想法？

/** *編輯/ 我解決了這個問題，使用setGeneratedColumn（）

在這裏，我是怎麼做。

public class ButtonColumnGenerator implements Table.ColumnGenerator{ 
    private static final long serialVersionUID = 1L; 

    @Override 
    public Object generateCell(Table source, Object itemId, Object columnId) { 
     Property prop = source.getItem(itemId).getItemProperty(columnId); 
     Button btnView = new Button(); 
     btnView.setData(itemId); 
     btnView.setDescription("Curriculum: " + itemId); 
     btnView.setIcon(new ThemeResource("../icons/eye.png"));    
     btnView.setWidth("20px"); 
     btnView.setHeight("20px"); 
     btnView.setStyleName(Reindeer.BUTTON_LINK);  

     return btnView; 
    } 
} 


/*** my app */ 
Button btnView = new Button(); 
Table tabela = new Table("",datasource); 
tabela.setVisibleColumns(new Object[]{"idCurriculum", "nome", "cpf"});  
tabela.setColumnHeaders(new String[] {"#", "Nome", "Cpf"}); 
tabela.addGeneratedColumn("", new ButtonColumnGenerator()); 

now works！

Answer 1

將UI組件添加到選擇組件（表，樹，TreeTable，ComboBox等）的數據源對於您的問題是錯誤的方法。 Table組件的容器數據源僅包含表的數據模型，而不包含將顯示此數據的組件。

因此，您不需要將屬性添加到JPAContainer（由於它在內部處理其屬性而不允許此容器），您可以使用Table.setTableFieldFactory(TableFieldFactory fieldFactory)將自定義com.vaadin.ui.TableFieldFactory設置爲您的表格。