/*
* #%L
* Alfresco Remote API
* %%
* Copyright (C) 2005 - 2016 Alfresco Software Limited
* %%
* This file is part of the Alfresco software.
* If the software was purchased under a paid Alfresco license, the terms of
* the paid license agreement will prevail. Otherwise, the software is
* provided under the following open source license terms:
*
* Alfresco is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Alfresco is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Alfresco. If not, see .
* #L%
*/
package org.alfresco.rest.api.impl;
import org.alfresco.query.CannedQueryPageDetails;
import org.alfresco.query.PageDetails;
import org.alfresco.query.PagingRequest;
import org.alfresco.query.PagingResults;
import org.alfresco.rest.framework.core.exceptions.InvalidArgumentException;
import org.alfresco.rest.framework.resource.parameters.Paging;
import org.alfresco.util.Pair;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
/**
* @author steveglover
* @author Jamal Kaabi-Mofrad
*/
public class Util
{
public static PagingRequest getPagingRequest(Paging paging)
{
PagingRequest pagingRequest = new PagingRequest(paging.getSkipCount(), paging.getMaxItems());
pagingRequest.setRequestTotalCountMax(CannedQueryPageDetails.DEFAULT_PAGE_SIZE);
return pagingRequest;
}
public static PagingResults wrapPagingResults(Paging paging, Collection result)
{
if (paging == null)
{
throw new InvalidArgumentException("paging object can't be null.");
}
if (result == null)
{
result = Collections.emptyList();
}
PagingRequest pagingRequest = getPagingRequest(paging);
final int totalSize = result.size();
final PageDetails pageDetails = PageDetails.getPageDetails(pagingRequest, totalSize);
final List page = new ArrayList<>(pageDetails.getPageSize());
Iterator it = result.iterator();
for (int counter = 0, end = pageDetails.getEnd(); counter < end && it.hasNext(); counter++)
{
T element = it.next();
if (counter < pageDetails.getSkipCount())
{
continue;
}
if (counter > end - 1)
{
break;
}
page.add(element);
}
return new PagingResults()
{
@Override
public List getPage()
{
return page;
}
@Override
public boolean hasMoreItems()
{
return pageDetails.hasMoreItems();
}
@Override
public Pair getTotalResultCount()
{
Integer total = totalSize;
return new Pair<>(total, total);
}
@Override
public String getQueryExecutionId()
{
return null;
}
};
}
}