vaadin table must sort entries in chronological order descending i.e. latest at the top then down to the earliest notes

问题

I have a vaadin table which is displaying Notes, with created date time. I want to sort entries in chronological order descending (i.e. latest at the top then down to the earliest notes) by default. When I added a new value it should be in top. This is a Java EE web application which is using Vaadin.

I tried ...

setSortContainerPropertyId(NoteContainer.DATE_CREATED);
setSortAscending(false);
sort();

inside my NoteTable constructor. But it only added the sorting functionality to DATE_CREATED column. when I clicked the that column header only it starts to sort. Please give me a proper solution...?

Note Table class constructor..

public NoteTable()
{
    dataSource = new NoteContainer();
    setContainerDataSource(dataSource);

    NoteTableColumnGenerator columnGenerator = new NoteTableColumnGenerator();
    addGeneratedColumn(ACTION, columnGenerator);
    addGeneratedColumn(CREATED_BY, columnGenerator);
    addGeneratedColumn(TEXT, columnGenerator);

    setVisibleColumns(NoteContainer.NATURAL_COL_ORDER);
    setSizeFull();

    Object[] columns = getVisibleColumns();
    for (int i = 0; i < columns.length; i++)
    {
        if (((String) columns[i]).equals(NoteContainer.DATE_CREATED))
            setColumnWidth(columns[i], 150);
        else if (((String) columns[i]).equals(NoteContainer.CREATED_BY))
            setColumnWidth(columns[i], 150);
        else if (((String) columns[i]).equals(NoteContainer.ACTION))
            setColumnWidth(columns[i], 150);
        else
            setColumnWidth(columns[i], 550);
    }
    setColumnHeaders(NoteContainer.COL_HEADERS_ENGLISH);

    setSelectable(true);
    setImmediate(true);
    setSortContainerPropertyId(NoteContainer.DATE_CREATED);
    setSortAscending(false);
    sort();
}

Note Container class

public class NoteContainer extends BeanItemContainer<CaseNote> implements Serializable
{
    private static final long serialVersionUID = -5926608449530066014L;

    public static final String DATE_CREATED = "dateCreated";
    public static final String CREATED_BY = "createdBy";
    public static final String TEXT = "text";
    public static final String ACTION = "Action";

    public static final Object[] NATURAL_COL_ORDER = new Object[] {
        ACTION, DATE_CREATED, CREATED_BY, TEXT

    };

    public static final String[] COL_HEADERS_ENGLISH = new String[] {
        "ACTION", "Date Created/Updated", "Created/Updated By", "Note"
    };

    /**
     * Default Constructor.
     * 
     */
    public NoteContainer()
    {
        super(CaseNote.class);
    }
 }

Note : CaseNote is an Entity Class.

回答1:

I resolved it by my self.. I added sort(); inside the table refresh() method instead of NoteTable constructor.

Now it is working fine. thank you everyone, who tried to help me.. :)

来源：https://stackoverflow.com/questions/16064806/vaadin-table-must-sort-entries-in-chronological-order-descending-i-e-latest-at

标签

sorting

java-ee

vaadin