/*
* This library is part of OpenCms -
* the Open Source Content Management System
*
* Copyright (c) Alkacon Software GmbH (http://www.alkacon.com)
*
* This library 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 2.1 of the License, or (at your option) any later version.
*
* This library 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.
*
* For further information about Alkacon Software GmbH, please see the
* company website: http://www.alkacon.com
*
* For further information about OpenCms, please see the
* project website: http://www.opencms.org
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package org.opencms.file.collectors;
import org.opencms.file.CmsDataAccessException;
import org.opencms.file.CmsObject;
import org.opencms.file.CmsResource;
import org.opencms.file.CmsResourceFilter;
import org.opencms.main.CmsException;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
/**
* A default resource collector that supports flexible sorting based on resource dates.<p>
*
* @since 7.0.2
*/
public class CmsDateResourceCollector extends A_CmsResourceCollector {
/** Static array of the collectors implemented by this class. */
private static final String[] COLLECTORS = {
"allInFolderDateDesc",
"allInFolderDateAsc",
"allInSubTreeDateDesc",
"allInSubTreeDateAsc"};
/** Array list for fast collector name lookup. */
private static final List<String> COLLECTORS_LIST = Collections.unmodifiableList(Arrays.asList(COLLECTORS));
/**
* @see org.opencms.file.collectors.I_CmsResourceCollector#getCollectorNames()
*/
public List<String> getCollectorNames() {
return COLLECTORS_LIST;
}
/**
* @see org.opencms.file.collectors.I_CmsResourceCollector#getCreateLink(org.opencms.file.CmsObject, java.lang.String, java.lang.String)
*/
public String getCreateLink(CmsObject cms, String collectorName, String param)
throws CmsDataAccessException, CmsException {
// if action is not set, use default action
if (collectorName == null) {
collectorName = COLLECTORS[0];
}
switch (COLLECTORS_LIST.indexOf(collectorName)) {
case 0:
// "allInFolderDateDesc"
case 1:
// "allInFolderDateAsc"
return getCreateInFolder(cms, new CmsExtendedCollectorData(param));
case 2:
// "allInSubTreeDateDesc"
case 3:
// "allInSubTreeDateAsc"
return null;
default:
throw new CmsDataAccessException(Messages.get().container(
Messages.ERR_COLLECTOR_NAME_INVALID_1,
collectorName));
}
}
/**
* @see org.opencms.file.collectors.I_CmsResourceCollector#getCreateParam(org.opencms.file.CmsObject, java.lang.String, java.lang.String)
*/
public String getCreateParam(CmsObject cms, String collectorName, String param) throws CmsDataAccessException {
// if action is not set, use default action
if (collectorName == null) {
collectorName = COLLECTORS[0];
}
switch (COLLECTORS_LIST.indexOf(collectorName)) {
case 0:
// "allInFolderDateDesc"
case 1:
// "allInFolderDateAsc"
return param;
case 2:
// "allInSubTreeDateDesc"
case 3:
// "allInSubTreeDateAsc"
return null;
default:
throw new CmsDataAccessException(Messages.get().container(
Messages.ERR_COLLECTOR_NAME_INVALID_1,
collectorName));
}
}
/**
* @see org.opencms.file.collectors.I_CmsResourceCollector#getResults(org.opencms.file.CmsObject, java.lang.String, java.lang.String)
*/
public List<CmsResource> getResults(CmsObject cms, String collectorName, String param)
throws CmsDataAccessException, CmsException {
// if action is not set use default
if (collectorName == null) {
collectorName = COLLECTORS[0];
}
switch (COLLECTORS_LIST.indexOf(collectorName)) {
case 0:
// "allInFolderDateDesc"
return allInFolderDate(cms, param, false, false);
case 1:
// "allInFolderDateAsc"
return allInFolderDate(cms, param, false, true);
case 2:
// "allInSubTreeDateDesc"
return allInFolderDate(cms, param, true, false);
case 3:
// "allInSubTreeDateAsc"
return allInFolderDate(cms, param, true, true);
default:
throw new CmsDataAccessException(Messages.get().container(
Messages.ERR_COLLECTOR_NAME_INVALID_1,
collectorName));
}
}
/**
* Returns a List of all resources in the folder pointed to by the parameter
* sorted by the selected dates.<p>
*
* @param cms the current CmsObject
* @param param must contain an extended collector parameter set as described by {@link CmsExtendedCollectorData}
* @param tree if true, look in folder and all child folders, if false, look only in given folder
* @param asc if <code>true</code>, the sort is ascending (old dates first), otherwise it is descending
* (new dates first)
*
* @return a List of all resources in the folder pointed to by the parameter sorted by the selected dates
*
* @throws CmsException if something goes wrong
*/
protected List<CmsResource> allInFolderDate(CmsObject cms, String param, boolean tree, boolean asc)
throws CmsException {
CmsExtendedCollectorData data = new CmsExtendedCollectorData(param);
String foldername = CmsResource.getFolderPath(data.getFileName());
List<String> dateIdentifiers = data.getAdditionalParams();
CmsResourceFilter filter = CmsResourceFilter.DEFAULT.addRequireType(data.getType()).addExcludeFlags(
CmsResource.FLAG_TEMPFILE);
List<CmsResource> result = cms.readResources(foldername, filter, tree);
// a special date comparator is used to sort the resources
CmsDateResourceComparator comparator = new CmsDateResourceComparator(cms, dateIdentifiers, asc);
Collections.sort(result, comparator);
return shrinkToFit(result, data.getCount());
}
}