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3d4e7938a7
ExtensionElement is now a marker interface that requires all implementation non-abstract classes to carry a static final QNAME field (of type QName). This is verified by a new unit test. Also FullyQualifiedElement is renamed to simply XmlElement. XmlElement is used over ExtensionElement when implementing classes do not statically know the qualified name of the XML elements they represent. In general, XmlElement should be used sparingly, and every XML element should be modeled by its own Java class (implementing ExtensionElement).
48 lines
1.6 KiB
Java
48 lines
1.6 KiB
Java
/**
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*
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* Copyright © 2014-2021 Florian Schmaus
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smack.util;
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import java.util.Collection;
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import org.jivesoftware.smack.packet.XmlElement;
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public class PacketUtil {
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/**
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* Get a extension element from a collection.
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*
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* @param collection Collection of ExtensionElements.
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* @param element name of the targeted ExtensionElement.
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* @param namespace namespace of the targeted ExtensionElement.
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* @param <PE> Type of the ExtensionElement
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*
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* @return the extension element
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*/
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@SuppressWarnings("unchecked")
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public static <PE extends XmlElement> PE extensionElementFrom(Collection<XmlElement> collection,
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String element, String namespace) {
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for (XmlElement packetExtension : collection) {
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if ((element == null || packetExtension.getElementName().equals(
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element))
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&& packetExtension.getNamespace().equals(namespace)) {
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return (PE) packetExtension;
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}
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}
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return null;
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}
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}
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