/**
* The contents of this file are subject to the license and copyright
* detailed in the LICENSE and NOTICE files at the root of the source
* tree and available online at
*
* http://www.dspace.org/license/
*/
package org.dspace.app.xmlui.aspect.browseArtifacts;
import org.apache.cocoon.caching.CacheableProcessingComponent;
import org.apache.cocoon.environment.ObjectModelHelper;
import org.apache.cocoon.environment.Request;
import org.apache.cocoon.util.HashUtil;
import org.apache.excalibur.source.SourceValidity;
import org.apache.excalibur.source.impl.validity.NOPValidity;
import org.dspace.app.xmlui.cocoon.AbstractDSpaceTransformer;
import org.dspace.app.xmlui.utils.HandleUtil;
import org.dspace.app.xmlui.utils.UIException;
import org.dspace.app.xmlui.wing.Message;
import org.dspace.app.xmlui.wing.WingException;
import org.dspace.app.xmlui.wing.element.List;
import org.dspace.app.xmlui.wing.element.Options;
import org.dspace.authorize.AuthorizeException;
import org.dspace.browse.BrowseException;
import org.dspace.browse.BrowseIndex;
import org.dspace.content.Collection;
import org.dspace.content.Community;
import org.dspace.content.DSpaceObject;
import org.dspace.content.Item;
import org.xml.sax.SAXException;
import java.io.IOException;
import java.io.Serializable;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.Map;
/**
* Navigation that adds code needed for the browse features from dspace
*
* @author Kevin Van de Velde (kevin at atmire dot com)
* @author Mark Diggory (markd at atmire dot com)
* @author Ben Bosman (ben at atmire dot com)
*/
public class Navigation extends AbstractDSpaceTransformer implements CacheableProcessingComponent {
/** Language Strings */
private static final Message T_head_all_of_dspace =
message("xmlui.ArtifactBrowser.Navigation.head_all_of_dspace");
private static final Message T_head_browse =
message("xmlui.ArtifactBrowser.Navigation.head_browse");
private static final Message T_communities_and_collections =
message("xmlui.ArtifactBrowser.Navigation.communities_and_collections");
private static final Message T_head_this_collection =
message("xmlui.ArtifactBrowser.Navigation.head_this_collection");
private static final Message T_head_this_community =
message("xmlui.ArtifactBrowser.Navigation.head_this_community");
/**
* Generate the unique caching key.
* This key must be unique inside the space of this component.
*/
public Serializable getKey() {
try {
Request request = ObjectModelHelper.getRequest(objectModel);
String key = request.getScheme() + request.getServerName() + request.getServerPort() + request.getSitemapURI() + request.getQueryString();
DSpaceObject dso = HandleUtil.obtainHandle(objectModel);
if (dso != null)
{
key += "-" + dso.getHandle();
}
return HashUtil.hash(key);
}
catch (SQLException sqle)
{
// Ignore all errors and just return that the component is not cachable.
return "0";
}
}
/**
* Generate the cache validity object.
*
* The cache is always valid.
*/
public SourceValidity getValidity() {
return NOPValidity.SHARED_INSTANCE;
}
/**
* Add the basic navigational options:
*
* browse - browse by Titles - browse by Authors - browse by Dates
*
* language FIXME: add languages
*
* context no context options are added.
*
* action no action options are added.
*/
public void addOptions(Options options) throws SAXException, WingException,
UIException, SQLException, IOException, AuthorizeException
{
/* Create skeleton menu structure to ensure consistent order between aspects,
* even if they are never used
*/
List browse = options.addList("browse");
options.addList("account");
options.addList("context");
options.addList("administrative");
browse.setHead(T_head_browse);
List browseGlobal = browse.addList("global");
List browseContext = browse.addList("context");
browseGlobal.setHead(T_head_all_of_dspace);
browseGlobal.addItemXref(contextPath + "/community-list",T_communities_and_collections);
// Add the configured browse lists for 'top level' browsing
addBrowseOptions(browseGlobal, contextPath + "/browse");
DSpaceObject dso = HandleUtil.obtainHandle(objectModel);
if (dso != null)
{
if (dso instanceof Item)
{
// If we are an item change the browse scope to the parent
// collection.
dso = ((Item) dso).getOwningCollection();
}
if (dso instanceof Collection)
{
browseContext.setHead(T_head_this_collection);
}
if (dso instanceof Community)
{
browseContext.setHead(T_head_this_community);
}
// Add the configured browse lists for scoped browsing
String handle = dso.getHandle();
addBrowseOptions(browseContext, contextPath + "/handle/" + handle + "/browse");
}
}
/**
* Add navigation for the configured browse tables to the supplied list.
*
* @param browseList
* @param browseURL
* @throws WingException
*/
private void addBrowseOptions(List browseList, String browseURL) throws WingException
{
// FIXME Exception handling
try
{
// Get a Map of all the browse tables
BrowseIndex[] bis = BrowseIndex.getBrowseIndices();
for (BrowseIndex bix : bis)
{
// Create a Map of the query parameters for this link
Map<String, String> queryParams = new HashMap<String, String>();
queryParams.put("type", bix.getName());
// Add a link to this browse
browseList.addItemXref(super.generateURL(browseURL, queryParams),
message("xmlui.ArtifactBrowser.Navigation.browse_" + bix.getName()));
}
}
catch (BrowseException bex)
{
throw new UIException("Unable to get browse indicies", bex);
}
}
}