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.contactlist.server.logic;
018
019import com.echothree.model.control.contactlist.common.exception.UnknownContactListGroupNameException;
020import com.echothree.model.control.contactlist.server.ContactListControl;
021import com.echothree.model.data.contactlist.server.entity.ContactListGroup;
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 ContactListGroupLogic
028    extends BaseLogic {
029    
030    private ContactListGroupLogic() {
031        super();
032    }
033    
034    private static class ContactListLogicHolder {
035        static ContactListGroupLogic instance = new ContactListGroupLogic();
036    }
037    
038    public static ContactListGroupLogic getInstance() {
039        return ContactListLogicHolder.instance;
040    }
041    
042    public ContactListGroup getContactListGroupByName(final ExecutionErrorAccumulator eea, final String contactListGroupName) {
043        var contactListControl = Session.getModelController(ContactListControl.class);
044        ContactListGroup contactListGroup = contactListControl.getContactListGroupByName(contactListGroupName);
045
046        if(contactListGroup == null) {
047            handleExecutionError(UnknownContactListGroupNameException.class, eea, ExecutionErrors.UnknownContactListGroupName.name(), contactListGroupName);
048        }
049
050        return contactListGroup;
051    }
052    
053}