THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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package com.adamkoch.learning.wicket; import java.io.Serializable; import java.util.ArrayList; import java.util.Collections; import java.util.Comparator; import java.util.Iterator; import java.util.List; import org.apache.wicket.extensions.markup.html.repeater.util.SortableDataProvider; import org.apache.wicket.model.AbstractReadOnlyModel; import org.apache.wicket.model.IModel; import org.apache.wicket.model.PropertyModel; public class UserProvider extends SortableDataProvider { class SortableDataProviderComparator implements Comparator<Contact>, Serializable { public int compare(final Contact o1, final Contact o2) { PropertyModel<Comparable> model1 = new PropertyModel<Comparable>(o1, getSort().getProperty()); PropertyModel<Comparable> model2 = new PropertyModel<Comparable>(o2, getSort().getProperty()); int result = model1.getObject().compareTo(model2.getObject()); if (!getSort().isAscending()) { result = -result; } return result; } } private List<Contact> list = new ArrayList<Contact>(); private SortableDataProviderComparator comparator = new SortableDataProviderComparator(); public UserProvider() { // The default sorting setSort("name.first", true); list.add(new Contact(new Name("Abby", "Zerind"))); list.add(new Contact(new Name("Bernard", "Youst"))); list.add(new Contact(new Name("Charlie", "Xerg"))); list.add(new Contact(new Name("Deitri", "West"))); list.add(new Contact(new Name("Ernie", "Vuntang"))); list.add(new Contact(new Name("Frank", "Unter"))); } public Iterator<Contact> iterator(final int first, final int count) { // In this example the whole list gets copied, sorted and sliced; in real applications typically your database would deliver a sorted and limited list // Get the data List<Contact> newList = new ArrayList<Contact>(list); // Sort the data Collections.sort(newList, comparator); // Return the data for the current page - this can be determined only after sorting return newList.subList(first, first + count).iterator(); } public IModel<Contact> model(final ContactObject object) { return new AbstractReadOnlyModel<Contact>() { @Override public Contact getObject() { return (Contact) object; } }; } public int size() { return list.size(); } } class Contact implements Serializable { private final Name name; public Contact(final Name name) { this.name = name; } public Name getName() { return name; } } class Name implements Serializable { private String firstName; private String lastName; public Name(final String fName, final String lName) { firstName = fName; lastName = lName; } public String getFirst() { return firstName; } public String getLast() { return lastName; } public void setFirst(final String firstName) { this.firstName = firstName; } public void setLast(final String lastName) { this.lastName = lastName; } } |
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