Package org.apache.wicket.markup.repeater.data

Class EmptyDataProvider<T>

  • Type Parameters:
    T -
    All Implemented Interfaces:
    java.io.Serializable, IDataProvider<T>, IDetachable, org.apache.wicket.util.io.IClusterable
    public class EmptyDataProvider<T>
extends java.lang.Object
implements IDataProvider<T>
    A convenience class to represent an empty data provider.
    Author:
    Phil Kulak
    See Also:
    Serialized Form

    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      static <T> EmptyDataProvider<T> getInstance()  
      java.util.Iterator<T> iterator​(long first, long count)
      Gets an iterator for the subset of total data
      IModel<T> model​(java.lang.Object object)
      Callback used by the consumer of this data provider to wrap objects retrieved from IDataProvider.iterator(long, long) with a model (usually a detachable one).
      long size()
      Gets total number of items in the collection represented by the DataProvider

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Constructor Detail

      • EmptyDataProvider

        public EmptyDataProvider()

    • Method Detail

      • getInstance

        public static <T> EmptyDataProvider<T> getInstance()
        Type Parameters:
        T -
        Returns:
        the singleton instance of this class

      • iterator

        public java.util.Iterator<T> iterator​(long first,
                                      long count)
        Description copied from interface: IDataProvider
        Gets an iterator for the subset of total data
        Specified by:
        iterator in interface IDataProvider<T>
        Parameters:
        first - first row of data
        count - minimum number of elements to retrieve
        Returns:
        iterator capable of iterating over {first, first+count} items

      • size

        public long size()
        Description copied from interface: IDataProvider
        Gets total number of items in the collection represented by the DataProvider
        Specified by:
        size in interface IDataProvider<T>
        Returns:
        total item count

      • model

        public IModel<T> model​(java.lang.Object object)
        Description copied from interface: IDataProvider
        Callback used by the consumer of this data provider to wrap objects retrieved from IDataProvider.iterator(long, long) with a model (usually a detachable one).
        Specified by:
        model in interface IDataProvider<T>
        Parameters:
        object - the object that needs to be wrapped
        Returns:
        the model representation of the object