001/** 002 * 003 * Copyright © 2014-2019 Florian Schmaus 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 */ 017 018package org.jivesoftware.smack.packet; 019 020/** 021 * Interface to represent a XML element. This is similar to {@link ExtensionElement}, but does not 022 * carry a namespace and is usually included as child element of an stanza extension. 023 */ 024public interface Element { 025 026 CharSequence toXML(XmlEnvironment xmlEnvironment); 027 028 /** 029 * Returns the XML representation of this Element. This method takes an optional argument for the enclosing 030 * namespace which may be null or the empty String if the value is not known. 031 * 032 * @param enclosingNamespace the enclosing namespace or {@code null}. 033 * @return the stanza extension as XML. 034 */ 035 default CharSequence toXML(String enclosingNamespace) { 036 XmlEnvironment xmlEnvironment = new XmlEnvironment(enclosingNamespace); 037 return toXML(xmlEnvironment); 038 } 039 040 default CharSequence toXML() { 041 return toXML(XmlEnvironment.EMPTY); 042 } 043}