001/**
002 *
003 * Copyright 2018 Paul Schaub
004 *
005 * Licensed under the Apache License, Version 2.0 (the "License");
006 * you may not use this file except in compliance with the License.
007 * You may obtain a copy of the License at
008 *
009 *     http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.jivesoftware.smackx.sid.element;
018
019import java.util.UUID;
020
021import org.jivesoftware.smack.packet.ExtensionElement;
022import org.jivesoftware.smack.util.StringUtils;
023
024public abstract class StableAndUniqueIdElement implements ExtensionElement {
025
026    public static final String ATTR_ID = "id";
027
028    private final String id;
029
030    public StableAndUniqueIdElement() {
031        this.id = UUID.randomUUID().toString();
032    }
033
034    public String getId() {
035        return id;
036    }
037
038    public StableAndUniqueIdElement(String id) {
039        if (StringUtils.isNullOrEmpty(id)) {
040            throw new IllegalArgumentException("Argument 'id' cannot be null or empty.");
041        }
042        this.id = id;
043    }
044}