001// Copyright 2008-2013 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.internal.InternalConstants;
018import org.apache.tapestry5.json.JSONArray;
019import org.apache.tapestry5.json.JSONObject;
020import org.apache.tapestry5.services.javascript.InitializationPriority;
021import org.apache.tapestry5.services.javascript.ModuleConfigurationCallback;
022import org.apache.tapestry5.services.javascript.StylesheetLink;
023
024import java.util.List;
025
026public class PartialMarkupDocumentLinker implements DocumentLinker
027{
028    private final JSONArray libraryURLs = new JSONArray();
029
030    private final JSONArray stylesheets = new JSONArray();
031
032    private final ModuleInitsManager initsManager = new ModuleInitsManager();
033
034    public void addCoreLibrary(String libraryURL)
035    {
036        notImplemented("addCoreLibrary");
037    }
038
039    public void addLibrary(String libraryURL)
040    {
041        libraryURLs.put(libraryURL);
042    }
043
044    public void addStylesheetLink(StylesheetLink stylesheet)
045    {
046        JSONObject object = new JSONObject(
047
048                "href", stylesheet.getURL(),
049
050                "media", stylesheet.getOptions().media);
051
052        stylesheets.put(object);
053    }
054
055    private void notImplemented(String methodName)
056    {
057        throw new UnsupportedOperationException(String.format("DocumentLinker.%s() is not implemented for partial page renders.", methodName));
058    }
059
060    public void addScript(InitializationPriority priority, String script)
061    {
062        notImplemented("addScript");
063    }
064    
065    public void addModuleConfigurationCallback(ModuleConfigurationCallback callback)
066    {
067        notImplemented("moduleConfigurationCallback");
068    }
069
070    public void addInitialization(InitializationPriority priority, String moduleName, String functionName, JSONArray arguments)
071    {
072        initsManager.addInitialization(priority, moduleName, functionName, arguments);
073    }
074
075    /**
076     * Commits changes, adding one or more keys to the reply.
077     *
078     * @param reply
079     *         JSON Object to be sent to client
080     */
081    public void commit(JSONObject reply)
082    {
083        if (libraryURLs.length() > 0)
084        {
085            reply.in(InternalConstants.PARTIAL_KEY).put("libraries", libraryURLs);
086        }
087
088        if (stylesheets.length() > 0)
089        {
090            reply.in(InternalConstants.PARTIAL_KEY).put("stylesheets", stylesheets);
091        }
092
093        List<?> inits = initsManager.getSortedInits();
094
095        if (inits.size() > 0)
096        {
097            reply.in(InternalConstants.PARTIAL_KEY).put("inits", JSONArray.from(inits));
098        }
099    }
100}