/*
* 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.lenya.modules.navigation;
import java.io.IOException;
import java.net.MalformedURLException;
import java.util.Map;
import org.apache.avalon.framework.activity.Initializable;
import org.apache.avalon.framework.parameters.Parameters;
import org.apache.cocoon.ProcessingException;
import org.apache.cocoon.environment.ObjectModelHelper;
import org.apache.cocoon.environment.Request;
import org.apache.cocoon.environment.SourceResolver;
import org.apache.cocoon.transformation.AbstractSAXTransformer;
import org.apache.lenya.cms.linking.Link;
import org.apache.lenya.cms.linking.LinkResolver;
import org.apache.lenya.cms.linking.LinkTarget;
import org.apache.lenya.cms.metadata.MetaData;
import org.apache.lenya.cms.metadata.MetaDataException;
import org.apache.lenya.cms.publication.Area;
import org.apache.lenya.cms.publication.Document;
import org.apache.lenya.cms.publication.DocumentFactory;
import org.apache.lenya.cms.publication.DocumentUtil;
import org.apache.lenya.cms.publication.Publication;
import org.apache.lenya.cms.publication.URLInformation;
import org.apache.lenya.util.ServletHelper;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.AttributesImpl;
/**
* Updates navigation nodes according to the site meta data of the corresponding
* documents.
*/
public class SiteMetaDataTransformer extends AbstractSAXTransformer implements Initializable {
private Area area;
private LinkResolver linkResolver;
public void setup(SourceResolver resolver, Map objectModel, String src, Parameters params)
throws ProcessingException, SAXException, IOException {
super.setup(resolver, objectModel, src, params);
Request req = ObjectModelHelper.getRequest(objectModel);
DocumentFactory factory = DocumentUtil.getDocumentFactory(this.manager, request);
String webappUrl = ServletHelper.getWebappURI(req);
URLInformation info = new URLInformation(webappUrl);
try {
Publication pub = factory.getPublication(info.getPublicationId());
this.area = pub.getArea(info.getArea());
} catch (Exception e) {
throw new RuntimeException(e);
}
}
public void initialize() throws Exception {
this.linkResolver = (LinkResolver) this.manager.lookup(LinkResolver.ROLE);
}
public void dispose() {
super.dispose();
if (this.linkResolver == null) {
this.manager.release(linkResolver);
}
}
protected static final String NAV_NAMESPACE = "http://apache.org/lenya/site/1.0";
protected static final String ELEM_LINK = "link";
protected static final String ATTR_HREF = "href";
/**
* The site meta data namespace.
*/
public static final String NAMESPACE = "http://apache.org/lenya/metadata/site/1.0";
/**
* The folderNode meta data element name.
*/
public static final String ELEM_FOLDER_NODE = "folderNode";
/**
* The externalLink meta data element name.
*/
public static final String ELEM_EXTERNAL_LINK = "externalLink";
public void startElement(String uri, String localName, String qName, Attributes attr)
throws SAXException {
if (uri != null && uri.equals(NAV_NAMESPACE) && localName.equals(ELEM_LINK)) {
AttributesImpl attrs = new AttributesImpl(attr);
String href = attrs.getValue(ATTR_HREF);
try {
if (href != null && href.startsWith("lenya-document:")) {
LinkTarget target = linkResolver.resolve(this.area.getPublication()
.getFactory(), getLinkUri(href));
if (target.exists()) {
Document doc = target.getDocument();
int hrefIndex = attrs.getIndex(ATTR_HREF);
if (isFolderNode(doc)) {
attrs.removeAttribute(hrefIndex);
} else {
String externalLink = getExternalLink(doc);
if (externalLink != null) {
attrs.setAttribute(hrefIndex, "", ATTR_HREF, ATTR_HREF, "CDATA",
externalLink);
}
}
}
}
} catch (Exception e) {
throw new SAXException(e);
} finally {
super.startElement(uri, localName, qName, attrs);
}
} else {
super.startElement(uri, localName, qName, attr);
}
}
protected boolean isFolderNode(Document doc) throws MetaDataException {
MetaData meta = doc.getMetaData(NAMESPACE);
String value = meta.getFirstValue(ELEM_FOLDER_NODE);
boolean isFolderNode = value != null && Boolean.valueOf(value).booleanValue();
return isFolderNode;
}
protected String getExternalLink(Document doc) throws MetaDataException {
MetaData meta = doc.getMetaData(NAMESPACE);
return meta.getFirstValue(ELEM_EXTERNAL_LINK);
}
protected String getLinkUri(String href) throws MalformedURLException {
int qm = href.indexOf("?");
String linkUri = qm < 0 ? href : href.substring(0, qm - 1);
Link link = new Link(linkUri);
if (link.getArea() == null) {
link.setArea(this.area.getName());
}
if (link.getPubId() == null) {
link.setPubId(this.area.getPublication().getId());
}
return link.getUri();
}
}