    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.internal.structure.ComponentPageElement;
    019import org.apache.tapestry5.internal.structure.Page;
    020import org.apache.tapestry5.ioc.internal.util.InternalUtils;
    021import org.apache.tapestry5.runtime.Component;
    022import org.apache.tapestry5.services.ComponentClassResolver;
    023import org.apache.tapestry5.services.ComponentSource;
    024import org.apache.tapestry5.services.RequestGlobals;
    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}