From 50da46ffda56be89277ff2ad287e17251849878c Mon Sep 17 00:00:00 2001 From: Florian Schmaus Date: Mon, 13 Apr 2020 21:27:31 +0200 Subject: [PATCH] core: Add ExtensionElementFilter --- .../smack/filter/ExtensionElementFilter.java | 53 +++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 smack-core/src/main/java/org/jivesoftware/smack/filter/ExtensionElementFilter.java diff --git a/smack-core/src/main/java/org/jivesoftware/smack/filter/ExtensionElementFilter.java b/smack-core/src/main/java/org/jivesoftware/smack/filter/ExtensionElementFilter.java new file mode 100644 index 000000000..ff84f403d --- /dev/null +++ b/smack-core/src/main/java/org/jivesoftware/smack/filter/ExtensionElementFilter.java @@ -0,0 +1,53 @@ +/** + * + * Copyright 2020 Florian Schmaus + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.jivesoftware.smack.filter; + +import javax.xml.namespace.QName; + +import org.jivesoftware.smack.packet.ExtensionElement; +import org.jivesoftware.smack.packet.Stanza; +import org.jivesoftware.smack.util.XmppElementUtil; + +public class ExtensionElementFilter implements StanzaFilter { + + private final Class extensionElementClass; + private final QName extensionElementQName; + + protected ExtensionElementFilter(Class extensionElementClass) { + this.extensionElementClass = extensionElementClass; + extensionElementQName = XmppElementUtil.getQNameFor(extensionElementClass); + } + + @Override + public final boolean accept(Stanza stanza) { + ExtensionElement extensionElement = stanza.getExtension(extensionElementQName); + if (extensionElement == null) { + return false; + } + + if (!extensionElementClass.isInstance(extensionElement)) { + return false; + } + + E specificExtensionElement = extensionElementClass.cast(extensionElement); + return accept(specificExtensionElement); + } + + public boolean accept(E extensionElement) { + return true; + } +}