/*
* 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.cocoon.portal.impl;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.avalon.framework.activity.Disposable;
import org.apache.avalon.framework.component.Component;
import org.apache.avalon.framework.configuration.Configurable;
import org.apache.avalon.framework.configuration.Configuration;
import org.apache.avalon.framework.context.Context;
import org.apache.avalon.framework.context.ContextException;
import org.apache.avalon.framework.context.Contextualizable;
import org.apache.avalon.framework.logger.AbstractLogEnabled;
import org.apache.avalon.framework.service.ServiceException;
import org.apache.avalon.framework.service.ServiceManager;
import org.apache.avalon.framework.service.Serviceable;
import org.apache.avalon.framework.thread.ThreadSafe;
import org.apache.cocoon.components.ContextHelper;
import org.apache.cocoon.environment.ObjectModelHelper;
import org.apache.cocoon.environment.Request;
import org.apache.cocoon.portal.PortalService;
import org.apache.cocoon.portal.event.impl.ChangeAspectDataEvent;
import org.apache.cocoon.portal.layout.CompositeLayout;
import org.apache.cocoon.portal.layout.Item;
import org.apache.cocoon.portal.layout.Layout;
import org.apache.cocoon.portal.layout.NamedItem;
/**
* Manages the various activities required for page labels.
*
* The name of the request parameter used to identify the page labelmay be configured
* here by declaring
* <br><parameter-name><i>request-parm-name</i></parameter-name><br>
* in the configuration for this component. The default request parameter name is
* 'pageLabel'.
* @author Ralph Goers
*
* @version CVS $Id$
*/
public class PageLabelManager
extends AbstractLogEnabled
implements ThreadSafe, Serviceable, Configurable, Contextualizable, Component, Disposable {
public static final String ROLE = PageLabelManager.class.getName();
/** The service manager */
protected ServiceManager manager;
/** The portal service */
protected PortalService portalService;
/** The cocoon context */
protected Context context;
protected String aspectName = null;
private String requestParameterName;
/** boolean to determine if page label should use directory structure */
private boolean useUrlPath;
private boolean nonStickyTabs;
private boolean marshallEvents;
protected static final String LABEL_ARRAY = PageLabelManager.class.getName() + "A";
protected static final String LABEL_MAP = "page-labels";
protected static final String EVENT_MAP = PageLabelManager.class.getName() + "E";
private static final String DEFAULT_REQUEST_PARAMETER_NAME = "pageLabel";
/**
* @see org.apache.avalon.framework.service.Serviceable#service(org.apache.avalon.framework.service.ServiceManager)
*/
public void service(ServiceManager manager) throws ServiceException {
this.manager = manager;
this.portalService = (PortalService) this.manager.lookup(PortalService.ROLE);
}
/**
* @see org.apache.avalon.framework.activity.Disposable#dispose()
*/
public void dispose() {
if (this.manager != null) {
this.manager.release(this.portalService);
this.manager = null;
}
}
/* (non-Javadoc)
* @see org.apache.avalon.framework.configuration.Configurable#configure(org.apache.avalon.framework.configuration.Configuration)
*/
public void configure(Configuration config) {
this.requestParameterName =
config.getChild("parameterName").getValue(DEFAULT_REQUEST_PARAMETER_NAME);
this.aspectName = config.getChild("aspectName").getValue("tab");
this.nonStickyTabs =
Boolean.valueOf(config.getChild("nonStickyTabs").getValue("false")).booleanValue();
this.marshallEvents =
Boolean.valueOf(config.getChild("marshallEvents").getValue("false")).booleanValue();
this.useUrlPath =
Boolean.valueOf(config.getChild("urlPath").getValue("false")).booleanValue();
}
/* (non-Javadoc)
* @see org.apache.avalon.framework.context.Contextualizable#contextualize(org.apache.avalon.framework.context.Context)
*/
public void contextualize(Context context) throws ContextException {
this.context = context;
}
/**
* Return the current page label.
* @return The current page label.
*/
public String getCurrentLabel() {
String[] labels = getLabels();
return labels[0];
}
/**
* Return the page label from the previous request.
* @return The previous page label.
*/
public String getPreviousLabel() {
String[] labels = getLabels();
return labels[1];
}
/**
* Sets the current page label.
* @return The current page label.
*/
public String setCurrentLabel() {
final Request request =
ObjectModelHelper.getRequest(ContextHelper.getObjectModel(this.context));
String value;
if (this.useUrlPath) {
value = request.getSitemapURI();
if (!isLabel(value)) {
value = null;
}
} else {
value = request.getParameter(this.requestParameterName);
}
String[] labels = getLabels();
if (value != null) {
labels[1] = labels[0];
labels[0] = value;
}
return labels[0];
}
/**
* Returns whether directory structure should be used
* @return A boolean specifying if directory structure should be used.
*/
public boolean isUrlPath() {
return this.useUrlPath;
}
/**
* Returns the request parameter being used to identify the page label.
* @return A String containing the request parameter name used for page labels.
*/
public String getRequestParameterName() {
return this.requestParameterName;
}
/**
* Return the Map that contains events for all the page labels.
* @return The Map to use for converting events to and from urls.
*/
public Map getPageEventMap() {
Map map = (Map) portalService.getAttribute(EVENT_MAP);
if (null == map) {
map = new HashMap();
portalService.setAttribute(EVENT_MAP, map);
}
return map;
}
protected Map getLabelMap() {
final Layout rootLayout = portalService.getComponentManager().getProfileManager().getPortalLayout(null, null);
Map map = (Map) rootLayout.getAspectData(LABEL_MAP);
if (null == map) {
map = this.initializeLabels();
rootLayout.setAspectData(LABEL_MAP, map);
}
return map;
}
/**
* Retrieve the events associated with the specified page label.
*
* @param pageLabel The label to retrieve the events for.
* @return A List containing all the events associated with the page label in the order they
* should occur.
*/
public List getPageLabelEvents(String pageLabel) {
final Map labelMap = this.getLabelMap();
List list = (List) labelMap.get(pageLabel);
if (list == null) {
list = new ArrayList();
labelMap.put(pageLabel, list);
}
return list;
}
public boolean isLabel(String pageLabel) {
final Map labelMap = this.getLabelMap();
return labelMap.containsKey(pageLabel);
}
/**
* Returns true if events are not to be exposed as request parameters
*/
public boolean isMarshallEvents() {
return this.marshallEvents;
}
/**
* Return the array containing the current and previous labels.
*/
private String[] getLabels() {
String[] labels = (String[]) portalService.getAttribute(LABEL_ARRAY);
if (null == labels) {
labels = new String[2];
labels[0] = getRoot();
portalService.setAttribute(LABEL_ARRAY, labels);
}
return labels;
}
/**
* Create the page label event map and return it.
*
* @param service The portal service
* @return The page label map.
*/
private Map initializeLabels() {
final Map map = new HashMap();
final Layout portalLayout =
portalService.getComponentManager().getProfileManager().getPortalLayout(null, null);
if (portalLayout instanceof CompositeLayout) {
this.populate((CompositeLayout) portalLayout, map, "", new ArrayList());
}
return map;
}
private String getRoot() {
final Layout portalLayout =
portalService.getComponentManager().getProfileManager().getPortalLayout(null, null);
if (portalLayout instanceof CompositeLayout) {
return getRoot((CompositeLayout)portalLayout, new StringBuffer(""));
}
return "";
}
private String getRoot(CompositeLayout layout, StringBuffer root) {
for (int j=0; j < layout.getSize(); j++) {
Item tab = layout.getItem(j);
if (tab instanceof NamedItem) {
if (root.length() > 0) {
root.append(".");
}
root.append(((NamedItem)tab).getName());
Layout child = tab.getLayout();
if (child != null && child instanceof CompositeLayout) {
getRoot((CompositeLayout)child, root);
}
break;
}
}
return root.toString();
}
/**
* Populate the event map
*
* @param layout
* @param map
* @param name
* @param parentEvents
*/
private List populate(CompositeLayout layout, Map map, String name, List parentEvents) {
List lhList = null;
for (int j = 0; j < layout.getSize(); j++) {
Item tab = layout.getItem(j);
ChangeAspectDataEvent event =
new ChangeAspectDataEvent(layout, this.aspectName, new Integer(j));
StringBuffer label = new StringBuffer(name);
if (label.length() > 0) {
label.append(".");
}
label.append((tab instanceof NamedItem) ? ((NamedItem) tab).getName() :
Integer.toString(j));
List events = new ArrayList(parentEvents);
events.add(event);
Layout child = tab.getLayout();
List allEvents = null;
if (child != null && child instanceof CompositeLayout) {
allEvents = populate((CompositeLayout) child, map, label.toString(), events);
}
if (this.nonStickyTabs) {
// With non-sticky tabs the non-leaf nodes always display
// the left-most child tabs
if (lhList == null) {
if (allEvents != null) {
lhList = allEvents;
} else {
lhList = events;
}
}
if (allEvents != null) {
map.put(label.toString(), allEvents);
} else {
map.put(label.toString(), events);
}
} else {
map.put(label.toString(), events);
}
}
return lhList;
}
}