001/**
002 * Copyright 2010-2014 The Kuali Foundation
003 *
004 * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
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 */
016package org.kuali.common.util.log.log4j.model;
017
018import java.util.Collections;
019import java.util.List;
020
021import javax.xml.bind.annotation.XmlAttribute;
022
023import org.kuali.common.util.Assert;
024import org.kuali.common.util.nullify.NullUtils;
025
026public final class AppenderRef {
027
028        public static final List<AppenderRef> EMPTY = Collections.<AppenderRef> emptyList();
029
030        @XmlAttribute
031        private final String ref;
032
033        @SuppressWarnings("unused")
034        private AppenderRef() {
035                this(NullUtils.NONE);
036        }
037
038        public AppenderRef(String ref) {
039                Assert.noBlanks(ref);
040                this.ref = ref;
041        }
042
043        public String getRef() {
044                return ref;
045        }
046
047}