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.party.server.logic;
018
019import com.echothree.model.control.party.common.exception.UnknownJavaTimeZoneNameException;
020import com.echothree.model.control.party.server.control.PartyControl;
021import com.echothree.model.data.party.server.entity.TimeZone;
022import com.echothree.util.common.message.ExecutionErrors;
023import com.echothree.util.server.control.BaseLogic;
024import com.echothree.util.server.message.ExecutionErrorAccumulator;
025import com.echothree.util.server.persistence.Session;
026
027public class TimeZoneLogic
028        extends BaseLogic {
029
030    private TimeZoneLogic() {
031        super();
032    }
033
034    private static class TimeZoneLogicHolder {
035        static TimeZoneLogic instance = new TimeZoneLogic();
036    }
037
038    public static TimeZoneLogic getInstance() {
039        return TimeZoneLogicHolder.instance;
040    }
041    
042    public TimeZone getTimeZoneByName(final ExecutionErrorAccumulator eea, final String javaTimeZoneName) {
043        var partyControl = Session.getModelController(PartyControl.class);
044        TimeZone timeZone = partyControl.getTimeZoneByJavaName(javaTimeZoneName);
045
046        if(timeZone == null) {
047            handleExecutionError(UnknownJavaTimeZoneNameException.class, eea, ExecutionErrors.UnknownJavaTimeZoneName.name(), javaTimeZoneName);
048        }
049
050        return timeZone;
051    }
052    
053}