// Copyright 2006, 2007, 2008, 2009 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.tapestry5.internal.services;
import org.apache.tapestry5.Link;
import org.apache.tapestry5.internal.structure.Page;
import org.apache.tapestry5.ioc.internal.util.CollectionFactory;
import org.apache.tapestry5.ioc.internal.util.Defense;
import org.apache.tapestry5.ioc.services.TypeCoercer;
import org.apache.tapestry5.services.*;
import java.util.List;
public class LinkSourceImpl implements LinkSource, LinkCreationHub
{
private final RequestPageCache pageCache;
private final PageRenderQueue pageRenderQueue;
private final PageActivationContextCollector contextCollector;
private final LinkFactory linkFactory;
private final List<LinkCreationListener> listeners = CollectionFactory.newThreadSafeList();
private final TypeCoercer typeCoercer;
private final ComponentClassResolver resolver;
public LinkSourceImpl(
RequestPageCache pageCache,
PageRenderQueue pageRenderQueue,
PageActivationContextCollector contextCollector,
LinkFactory linkFactory, TypeCoercer typeCoercer, ComponentClassResolver resolver)
{
this.pageCache = pageCache;
this.pageRenderQueue = pageRenderQueue;
this.contextCollector = contextCollector;
this.linkFactory = linkFactory;
this.typeCoercer = typeCoercer;
this.resolver = resolver;
}
public Link createComponentEventLink(Page page, String nestedId, String eventType, boolean forForm,
Object... eventContext)
{
Defense.notNull(page, "page");
Defense.notBlank(eventType, "action");
Page activePage = pageRenderQueue.getRenderingPage();
// See TAPESTRY-2184
if (activePage == null)
activePage = page;
String activePageName = activePage.getName();
Object[] pageActivationContext = contextCollector.collectPageActivationContext(activePageName);
ComponentEventRequestParameters parameters
= new ComponentEventRequestParameters(
activePageName,
page.getName(),
toBlank(nestedId),
eventType,
new ArrayEventContext(typeCoercer, pageActivationContext),
new ArrayEventContext(typeCoercer, eventContext));
Link link = linkFactory.createComponentEventLink(parameters, forForm);
for (LinkCreationListener listener : listeners)
listener.createdComponentEventLink(link);
return link;
}
private String toBlank(String input)
{
return input == null ? "" : input;
}
public Link createPageRenderLink(String pageName, boolean override, Object... pageActivationContext)
{
// Resolve the page name to its canonical format (the best version for URLs). This also validates
// the page name.
String canonical = resolver.canonicalizePageName(pageName);
Object[] context = (override || pageActivationContext.length != 0)
? pageActivationContext
: contextCollector.collectPageActivationContext(canonical);
PageRenderRequestParameters parameters =
new PageRenderRequestParameters(canonical,
new ArrayEventContext(typeCoercer, context));
Link link = linkFactory.createPageRenderLink(parameters);
for (LinkCreationListener listener : listeners)
listener.createdPageRenderLink(link);
return link;
}
public LinkCreationHub getLinkCreationHub()
{
return this;
}
public void addListener(LinkCreationListener listener)
{
Defense.notNull(listener, "listener");
listeners.add(listener);
}
public void removeListener(LinkCreationListener listener)
{
Defense.notNull(listener, "listener");
listeners.remove(listener);
}
}