001// Copyright 2006, 2007, 2008, 2010 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
015package org.apache.tapestry5.internal.services;
016
017import org.apache.tapestry5.ComponentResources;
018import org.apache.tapestry5.http.services.RequestGlobals;
019import org.apache.tapestry5.internal.structure.ComponentPageElement;
020import org.apache.tapestry5.internal.structure.Page;
021import org.apache.tapestry5.ioc.internal.util.InternalUtils;
022import org.apache.tapestry5.runtime.Component;
023import org.apache.tapestry5.services.ComponentClassResolver;
024import org.apache.tapestry5.services.ComponentSource;
025
026@SuppressWarnings("all")
027public class ComponentSourceImpl implements ComponentSource
028{
029    private final RequestPageCache pageCache;
030
031    private final ComponentClassResolver resolver;
032
033    private final RequestGlobals globals;
034
035    public ComponentSourceImpl(RequestPageCache pageCache, ComponentClassResolver resolver, RequestGlobals globals)
036    {
037        this.pageCache = pageCache;
038        this.resolver = resolver;
039        this.globals = globals;
040    }
041
042    public Component getComponent(String completeId)
043    {
044        assert InternalUtils.isNonBlank(completeId);
045
046        int colonx = completeId.indexOf(':');
047
048        if (colonx < 0)
049        {
050            Page page = pageCache.get(completeId);
051
052            return page.getRootComponent();
053        }
054
055        String pageName = completeId.substring(0, colonx);
056
057        Page page = pageCache.get(pageName);
058        String nestedId = completeId.substring(colonx + 1);
059        String mixinId = null;
060
061        int dollarx = nestedId.indexOf("$");
062
063        if (dollarx > 0)
064        {
065            mixinId = nestedId.substring(dollarx + 1);
066            nestedId = nestedId.substring(0, dollarx);
067        }
068
069        ComponentPageElement element = page.getComponentElementByNestedId(nestedId);
070
071        if (mixinId == null)
072            return element.getComponent();
073
074        ComponentResources resources = element.getMixinResources(mixinId);
075
076        return resources.getComponent();
077    }
078
079    public Component getPage(String pageName)
080    {
081        assert pageName != null;
082
083        Page page = pageCache.get(pageName);
084
085        return page.getRootComponent();
086    }
087
088    public Component getPage(Class pageClass)
089    {
090        assert pageClass != null;
091
092        String pageName = resolver.resolvePageClassNameToPageName(pageClass.getName());
093
094        return getPage(pageName);
095    }
096
097    public Component getActivePage()
098    {
099        String pageName = globals.getActivePageName();
100
101        return pageName == null ? null : getPage(pageName);
102    }
103
104}