/*
* Copyright 1999-2002,2004 The Apache Software Foundation.
*
* Licensed 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.Iterator;
import java.util.List;
import org.apache.cocoon.portal.event.Event;
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.NamedItem;
import org.apache.avalon.framework.service.ServiceException;
import org.apache.avalon.framework.service.ServiceManager;
import org.apache.excalibur.source.SourceUtil;
/**
* The PageLabelLinkService generates links for named items defined in the layout portal.xml.
* Links for other entities are passed to the DefaultLinkService to be resolved.
*
* @author Ralph Goers
*
* @version CVS $Id: $
*/
public class PageLabelLinkService extends DefaultLinkService {
protected String apectName;
/** The label manager */
protected PageLabelManager labelManager;
/* (non-Javadoc)
* @see org.apache.avalon.framework.service.Serviceable#service(org.apache.avalon.framework.service.ServiceManager)
*/
public void service(ServiceManager manager) throws ServiceException {
super.service(manager);
this.labelManager = (PageLabelManager)this.manager.lookup(PageLabelManager.ROLE);
}
/**
* Get the uri for the coplet containing event
*
* @param event The event to find
* @return A URI
*/
public String getLinkURI(Event event) {
if (event == null) {
return this.getRefreshLinkURI();
}
if (this.labelManager == null) {
super.getLinkURI(event);
}
String requestParameterName = this.labelManager.getRequestParameterName();
if (event instanceof ChangeAspectDataEvent &&
((ChangeAspectDataEvent) event).getTarget() instanceof CompositeLayout) {
ChangeAspectDataEvent e = (ChangeAspectDataEvent)event;
CompositeLayout layout = (CompositeLayout)e.getTarget();
int i = ((Integer)e.getData()).intValue();
Item item = layout.getItem(i);
if (item instanceof NamedItem) {
StringBuffer key = new StringBuffer("");
getKey(item, key);
if (this.labelManager.getPageLabelEvents(key.toString()) != null) {
final Info info = this.getInfo();
boolean hasParams = info.hasParameters;
final StringBuffer buffer = new StringBuffer(info.linkBase.toString());
if (hasParams) {
buffer.append('&');
}
else {
buffer.append('?');
}
buffer.append(requestParameterName).append('=')
.append(SourceUtil.encode(key.toString()));
return buffer.toString();
}
}
}
String label = this.labelManager.getCurrentLabel();
return getLink(super.getLinkURI(event), requestParameterName, label);
}
/**
* Get the uri for this coplet containing the additional events.
*
* @param events The events that will be processed by the generated uri.
* @return A URI
*/
public String getLinkURI(List events)
{
if (events == null || events.size() == 0) {
return this.getRefreshLinkURI();
}
if (this.labelManager == null) {
super.getLinkURI(events);
}
String requestParameterName = this.labelManager.getRequestParameterName();
final Info info = this.getInfo();
final StringBuffer buffer = new StringBuffer(info.linkBase.toString());
boolean hasParams = info.hasParameters;
Iterator iter = events.iterator();
StringBuffer value = new StringBuffer("");
while (iter.hasNext())
{
Event event = (Event)iter.next();
if (event instanceof ChangeAspectDataEvent &&
((ChangeAspectDataEvent) event).getTarget() instanceof CompositeLayout) {
ChangeAspectDataEvent e = (ChangeAspectDataEvent) event;
CompositeLayout layout = (CompositeLayout) e.getTarget();
int i = ((Integer) e.getData()).intValue();
Item item = layout.getItem(i);
if (value.length() > 0) {
value.append('.');
}
if (item instanceof NamedItem) {
value.append(((NamedItem)item).getName());
}
else {
value.append(Integer.toString(i));
}
}
else {
String label = this.labelManager.getCurrentLabel();
return getLink(super.getLinkURI(events), requestParameterName, label);
}
}
if (value.length() > 0 && this.labelManager.getPageLabelEvents(value.toString()) != null) {
if (hasParams) {
buffer.append('&');
}
else {
buffer.append('?');
}
buffer.append(requestParameterName).append('=')
.append(SourceUtil.encode(value.toString()));
return buffer.toString();
}
String label = this.labelManager.getCurrentLabel();
return getLink(super.getLinkURI(events), requestParameterName, label);
}
/* (non-Javadoc)
* @see org.apache.avalon.framework.activity.Disposable#dispose()
*/
public void dispose() {
if (this.manager != null) {
if (this.labelManager != null) {
this.manager.release(this.labelManager);
this.labelManager = null;
}
}
super.dispose();
}
/*
* Generates the page label.
* @param item An Item.
* @param key The StringBuffer in which to create the page label.
*/
private void getKey(Item item, StringBuffer key) {
CompositeLayout parentLayout = item.getParent();
Item parentItem = parentLayout.getParent();
if (parentItem != null) {
getKey(parentItem, key);
}
if (key.length() > 0) {
key.append('.');
}
if (item instanceof NamedItem) {
key.append(((NamedItem) item).getName());
}
else {
key.append(parentLayout.getItems().indexOf(item));
}
}
/*
* Append the page label to the link.
* @param link The link to add the label to.
* @param parmName The request parameter name.
* @param label The page label.
* @return The modified link.
*/
private String getLink(String link, String parmName, String label)
{
if (label == null) {
return link;
}
StringBuffer uri = new StringBuffer(link);
if (link.indexOf('?') >= 0) {
uri.append('&');
} else {
uri.append('?');
}
uri.append(parmName).append('=').append(SourceUtil.encode(label));
return uri.toString();
}
}