/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.wicket.devutils.diskstore.browser;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.apache.wicket.devutils.diskstore.DebugDiskDataStore;
import org.apache.wicket.extensions.markup.html.repeater.data.sort.ISortState;
import org.apache.wicket.extensions.markup.html.repeater.data.table.ISortableDataProvider;
import org.apache.wicket.markup.repeater.data.IDataProvider;
import org.apache.wicket.model.IModel;
import org.apache.wicket.model.Model;
import org.apache.wicket.pageStore.PageWindowManager.PageWindow;
/**
* An {@link IDataProvider} that extracts the information about the stored pages
*/
class PageWindowProvider implements ISortableDataProvider<PageWindowDescription, String>
{
private static final int MAX_PAGES_TO_READ = 1000;
/**
* The model that brings the currently selected session id
*/
private final IModel<String> sessionId;
PageWindowProvider(final IModel<String> sessionId)
{
this.sessionId = sessionId;
}
public Iterator<? extends PageWindowDescription> iterator(long first, long count)
{
List<PageWindow> lastPageWindows = getPageWindows();
List<PageWindow> subList = lastPageWindows.subList((int)first, (int)(first + count));
List<PageWindowDescription> pageDescriptions = new ArrayList<PageWindowDescription>();
for (PageWindow pw : subList)
{
pageDescriptions.add(new PageWindowDescription(pw, sessionId.getObject()));
}
return pageDescriptions.iterator();
}
private List<PageWindow> getPageWindows()
{
List<PageWindow> lastPageWindows = new ArrayList<PageWindow>();
if (sessionId != null && sessionId.getObject() != null)
{
String sessId = sessionId.getObject();
DebugDiskDataStore dataStore = DataStoreHelper.getDataStore();
List<PageWindow> pageWindows = dataStore.getLastPageWindows(sessId, MAX_PAGES_TO_READ);
lastPageWindows.addAll(pageWindows);
}
return lastPageWindows;
}
public long size()
{
return getPageWindows().size();
}
/**
* @param description
*
* {@inheritDoc}
*/
public IModel<PageWindowDescription> model(PageWindowDescription description)
{
return new Model<PageWindowDescription>(description);
}
public void detach()
{
sessionId.detach();
}
/*
* No sort state for now. The provider is ISortableDataProvider just because we use
* DefaultDataTable
*/
public ISortState<String> getSortState()
{
return null;
}
}