    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
    015    package org.apache.tapestry5.internal.services;
    016
    017    import org.apache.tapestry5.ComponentResources;
    018    import org.apache.tapestry5.internal.structure.ComponentPageElement;
    019    import org.apache.tapestry5.internal.structure.Page;
    020    import org.apache.tapestry5.ioc.internal.util.InternalUtils;
    021    import org.apache.tapestry5.runtime.Component;
    022    import org.apache.tapestry5.services.ComponentClassResolver;
    023    import org.apache.tapestry5.services.ComponentSource;
    024    import org.apache.tapestry5.services.RequestGlobals;
    025
    026    @SuppressWarnings("all")
    027    public 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    }