001// --------------------------------------------------------------------------------
002// Copyright 2002-2024 Echo Three, LLC
003//
004// Licensed under the Apache License, Version 2.0 (the "License");
005// you may not use this file except in compliance with the License.
006// You may obtain a copy of the License at
007//
008//     http://www.apache.org/licenses/LICENSE-2.0
009//
010// Unless required by applicable law or agreed to in writing, software
011// distributed under the License is distributed on an "AS IS" BASIS,
012// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013// See the License for the specific language governing permissions and
014// limitations under the License.
015// --------------------------------------------------------------------------------
016
017package com.echothree.model.control.letter.server.transfer;
018
019import com.echothree.model.control.chain.common.transfer.ChainInstanceTransfer;
020import com.echothree.model.control.chain.server.control.ChainControl;
021import com.echothree.model.control.letter.common.transfer.LetterTransfer;
022import com.echothree.model.control.letter.common.transfer.QueuedLetterTransfer;
023import com.echothree.model.control.letter.server.control.LetterControl;
024import com.echothree.model.data.letter.server.entity.QueuedLetter;
025import com.echothree.model.data.user.server.entity.UserVisit;
026import com.echothree.util.server.persistence.Session;
027
028public class QueuedLetterTransferCache
029        extends BaseLetterTransferCache<QueuedLetter, QueuedLetterTransfer> {
030    
031    ChainControl chainControl;
032    
033    /** Creates a new instance of QueuedLetterTransferCache */
034    public QueuedLetterTransferCache(UserVisit userVisit, LetterControl letterControl) {
035        super(userVisit, letterControl);
036        
037        chainControl = Session.getModelController(ChainControl.class);
038    }
039    
040    public QueuedLetterTransfer getQueuedLetterTransfer(QueuedLetter queuedLetter) {
041        QueuedLetterTransfer queuedLetterTransfer = get(queuedLetter);
042        
043        if(queuedLetterTransfer == null) {
044            ChainInstanceTransfer chainInstance = chainControl.getChainInstanceTransfer(userVisit, queuedLetter.getChainInstance());
045            LetterTransfer letter = letterControl.getLetterTransfer(userVisit, queuedLetter.getLetter());
046            
047            queuedLetterTransfer = new QueuedLetterTransfer(chainInstance, letter);
048            put(queuedLetter, queuedLetterTransfer);
049        }
050        
051        return queuedLetterTransfer;
052    }
053    
054}