001// Copyright 2012 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.ioc.internal.util.CollectionFactory;
018import org.apache.tapestry5.ioc.internal.util.InternalUtils;
019import org.apache.tapestry5.json.JSONArray;
020import org.apache.tapestry5.services.javascript.InitializationPriority;
021
022import java.util.ArrayList;
023import java.util.List;
024import java.util.Map;
025import java.util.Set;
026
027public class ModuleInitsManager
028{
029    private final Set<String> pureInits = CollectionFactory.newSet();
030
031    private final Map<InitializationPriority, List<Object>> inits = CollectionFactory.newMap();
032
033    private int initCount;
034
035    public void addInitialization(InitializationPriority priority, String moduleName, String functionName, JSONArray arguments)
036    {
037        assert priority != null;
038        assert InternalUtils.isNonBlank(moduleName);
039
040        String name = functionName == null ? moduleName : moduleName + ":" + functionName;
041
042        if ((arguments == null || arguments.length() == 0))
043        {
044            if (pureInits.contains(name))
045            {
046                // A degenerate case is a pure init added repeatedly with different priorities. That isn't handled:
047                // the first priority wins.
048                return;
049            }
050
051            pureInits.add(name);
052            InternalUtils.addToMapList(inits, priority, name);
053        } else
054        {
055
056            JSONArray init = new JSONArray();
057
058            init.put(name);
059
060            init.putAll(arguments);
061
062            InternalUtils.addToMapList(inits, priority, init);
063        }
064
065        initCount++;
066    }
067
068    /**
069     * Returns all previously added inits, sorted by {@link InitializationPriority}, then by order in which they
070     * were added.
071     */
072    public List<?> getSortedInits()
073    {
074        List<Object> result = new ArrayList<Object>(initCount);
075
076        for (InitializationPriority p : InitializationPriority.values())
077        {
078            List<Object> initsForPriority = inits.get(p);
079
080            if (initsForPriority != null)
081            {
082                result.addAll(initsForPriority);
083            }
084        }
085
086        return result;
087    }
088}