001 // Copyright 2006, 2007, 2008, 2009, 2010, 2011 The Apache Software Foundation
002 //
003 // Licensed under the Apache License, Version 2.0 (the "License");
004 // you may not use this file except in compliance with the License.
005 // You may obtain a copy of the License at
006 //
007 // http://www.apache.org/licenses/LICENSE-2.0
008 //
009 // Unless required by applicable law or agreed to in writing, software
010 // distributed under the License is distributed on an "AS IS" BASIS,
011 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012 // See the License for the specific language governing permissions and
013 // limitations under the License.
014
015 package org.apache.tapestry5.internal.services;
016
017 import java.util.List;
018
019 import org.apache.tapestry5.Link;
020 import org.apache.tapestry5.internal.TapestryInternalUtils;
021 import org.apache.tapestry5.internal.structure.Page;
022 import org.apache.tapestry5.ioc.internal.util.CollectionFactory;
023 import org.apache.tapestry5.ioc.internal.util.InternalUtils;
024 import org.apache.tapestry5.ioc.services.TypeCoercer;
025 import org.apache.tapestry5.services.ComponentClassResolver;
026 import org.apache.tapestry5.services.ComponentEventLinkEncoder;
027 import org.apache.tapestry5.services.ComponentEventRequestParameters;
028 import org.apache.tapestry5.services.LinkCreationHub;
029 import org.apache.tapestry5.services.LinkCreationListener;
030 import org.apache.tapestry5.services.LinkCreationListener2;
031 import org.apache.tapestry5.services.PageRenderRequestParameters;
032 import org.apache.tapestry5.services.RequestGlobals;
033
034 @SuppressWarnings("all")
035 public class LinkSourceImpl implements LinkSource, LinkCreationHub
036 {
037 private final PageRenderQueue pageRenderQueue;
038
039 private final PageActivationContextCollector contextCollector;
040
041 private final ComponentEventLinkEncoder linkEncoder;
042
043 private final List<LinkCreationListener2> listeners = CollectionFactory.newThreadSafeList();
044
045 private final TypeCoercer typeCoercer;
046
047 private final ComponentClassResolver resolver;
048
049 private final RequestGlobals requestGlobals;
050
051 private final RequestPageCache pageCache;
052
053 public LinkSourceImpl(PageRenderQueue pageRenderQueue, PageActivationContextCollector contextCollector,
054 TypeCoercer typeCoercer, ComponentClassResolver resolver, ComponentEventLinkEncoder linkEncoder,
055 RequestGlobals requestGlobals, RequestPageCache pageCache, List<LinkCreationListener2> configuration)
056 {
057 this.pageRenderQueue = pageRenderQueue;
058 this.contextCollector = contextCollector;
059 this.typeCoercer = typeCoercer;
060 this.resolver = resolver;
061 this.linkEncoder = linkEncoder;
062 this.requestGlobals = requestGlobals;
063 this.pageCache = pageCache;
064
065 listeners.addAll(configuration);
066 }
067
068 public Link createComponentEventLink(Page page, String nestedId, String eventType, boolean forForm,
069 Object... eventContext)
070 {
071 assert page != null;
072 assert InternalUtils.isNonBlank(eventType);
073
074 Page activePage = pageRenderQueue.getRenderingPage();
075
076 // See TAPESTRY-2184
077 if (activePage == null)
078 activePage = page;
079
080 String activePageName = activePage.getName();
081
082 Object[] pageActivationContext = contextCollector.collectPageActivationContext(activePageName);
083
084 ComponentEventRequestParameters parameters = new ComponentEventRequestParameters(activePageName,
085 page.getName(), toBlank(nestedId), eventType,
086 new ArrayEventContext(typeCoercer, pageActivationContext), new ArrayEventContext(typeCoercer,
087 eventContext));
088
089 Link link = linkEncoder.createComponentEventLink(parameters, forForm);
090
091 for (LinkCreationListener2 listener : listeners)
092 listener.createdComponentEventLink(link, parameters);
093
094 return link;
095 }
096
097 private String toBlank(String input)
098 {
099 return input == null ? "" : input;
100 }
101
102 public Link createPageRenderLink(String pageName, boolean override, Object... pageActivationContext)
103 {
104 // Resolve the page name to its canonical format (the best version for URLs). This also
105 // validates
106 // the page name.
107
108 String canonical = resolver.canonicalizePageName(pageName);
109
110 Object[] context = (override || pageActivationContext.length != 0) ? pageActivationContext : contextCollector
111 .collectPageActivationContext(canonical);
112
113 boolean loopback = canonical.equals(requestGlobals.getActivePageName())
114 && pageCache.get(pageName).hasResetListeners();
115
116 PageRenderRequestParameters parameters = new PageRenderRequestParameters(canonical, new ArrayEventContext(
117 typeCoercer, context), loopback);
118
119 Link link = linkEncoder.createPageRenderLink(parameters);
120
121 for (LinkCreationListener2 listener : listeners)
122 listener.createdPageRenderLink(link, parameters);
123
124 return link;
125 }
126
127 public LinkCreationHub getLinkCreationHub()
128 {
129 return this;
130 }
131
132 public void addListener(LinkCreationListener listener)
133 {
134 assert listener != null;
135
136 addListener(TapestryInternalUtils.toLinkCreationListener2(listener));
137 }
138
139 public void addListener(LinkCreationListener2 listener)
140 {
141 assert listener != null;
142
143 listeners.add(listener);
144 }
145 }