001/** 002 * 003 * Copyright © 2014-2020 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 020import org.jivesoftware.smack.util.XmlStringBuilder; 021 022/** 023 * The stream open <b>tag</b>. 024 */ 025public final class StreamOpen extends AbstractStreamOpen { 026 public static final String UNPREFIXED_ELEMENT = "stream"; 027 028 public static final String ELEMENT = "stream:" + UNPREFIXED_ELEMENT; 029 030 public StreamOpen(CharSequence to) { 031 this(to, null, null, null, StreamContentNamespace.client); 032 } 033 034 public StreamOpen(CharSequence to, CharSequence from, String id) { 035 this(to, from, id, "en", StreamContentNamespace.client); 036 } 037 038 public StreamOpen(CharSequence to, CharSequence from, String id, String lang) { 039 super(to, from, id, lang); 040 } 041 042 public StreamOpen(CharSequence to, CharSequence from, String id, String lang, StreamContentNamespace ns) { 043 super(to, from, id, lang, ns); 044 } 045 046 @Override 047 public String getNamespace() { 048 return contentNamespace; 049 } 050 051 @Override 052 public String getElementName() { 053 return ELEMENT; 054 } 055 056 @Override 057 public XmlStringBuilder toXML(XmlEnvironment enclosingXmlEnvironment) { 058 XmlStringBuilder xml = new XmlStringBuilder(); 059 xml.halfOpenElement(getElementName()); 060 061 String namespace = CLIENT_NAMESPACE; 062 // We always want to state 'xmlns' for stream open tags. 063 if (enclosingXmlEnvironment != null) { 064 namespace = enclosingXmlEnvironment.getEffectiveNamespaceOrUse(CLIENT_NAMESPACE); 065 } 066 xml.attribute("xmlns", namespace); 067 068 xml.attribute("to", to); 069 xml.attribute("xmlns:stream", "http://etherx.jabber.org/streams"); 070 xml.attribute("version", VERSION); 071 xml.optAttribute("from", from); 072 xml.optAttribute("id", id); 073 xml.xmllangAttribute(lang); 074 xml.rightAngleBracket(); 075 return xml; 076 } 077 078 public enum StreamContentNamespace { 079 client, 080 server, 081 } 082}