    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.commons.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}