001/**
002 *
003 * Copyright 2020 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.fallback_indication.element;
018
019import org.jivesoftware.smack.packet.ExtensionElement;
020import org.jivesoftware.smack.packet.Message;
021import org.jivesoftware.smack.packet.XmlEnvironment;
022import org.jivesoftware.smack.util.XmlStringBuilder;
023
024public class FallbackIndicationElement implements ExtensionElement {
025
026    public static final String NAMESPACE = "urn:xmpp:fallback:0";
027    public static final String ELEMENT = "fallback";
028
029    public static final FallbackIndicationElement INSTANCE = new FallbackIndicationElement();
030
031    @Override
032    public String getNamespace() {
033        return NAMESPACE;
034    }
035
036    @Override
037    public String getElementName() {
038        return ELEMENT;
039    }
040
041    @Override
042    public XmlStringBuilder toXML(XmlEnvironment xmlEnvironment) {
043        return new XmlStringBuilder(this).closeEmptyElement();
044    }
045
046    public static boolean hasFallbackIndication(Message message) {
047        return message.hasExtension(ELEMENT, NAMESPACE);
048    }
049
050    public static FallbackIndicationElement fromMessage(Message message) {
051        return message.getExtension(FallbackIndicationElement.class);
052    }
053}