72 lines
2.5 KiB
Java
72 lines
2.5 KiB
Java
/**
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*
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* Copyright 2017 Paul Schaub
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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.smackx.jingle_filetransfer.element;
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import org.jivesoftware.smack.packet.ExtensionElement;
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import org.jivesoftware.smack.util.Objects;
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import org.jivesoftware.smack.util.XmlStringBuilder;
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import org.jivesoftware.smackx.jingle.element.JingleContentElement;
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import org.jivesoftware.smackx.jingle_filetransfer.component.JingleFileTransfer;
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/**
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* Checksum element declared in <a href="https://xmpp.org/extensions/xep-0234.html#hash">XEP-0234</a>.
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*/
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public class ChecksumElement implements ExtensionElement {
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public static final String ELEMENT = "checksum";
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public static final String ATTR_CREATOR = "creator";
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public static final String ATTR_NAME = "name";
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private final JingleContentElement.Creator creator;
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private final String name;
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private final JingleFileTransferChildElement file;
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/**
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* Create a new ChecksumElement.
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* @param creator creator of the content (party that added the file to the transmission).
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* @param name name of the content.
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* @param file metadata of the file.
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*/
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public ChecksumElement(JingleContentElement.Creator creator, String name, JingleFileTransferChildElement file) {
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this.creator = creator;
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this.name = name;
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this.file = Objects.requireNonNull(file, "file MUST NOT be null.");
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Objects.requireNonNull(file.getHash(), "file MUST contain at least one hash element.");
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}
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@Override
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public String getElementName() {
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return ELEMENT;
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}
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@Override
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public CharSequence toXML(String enclosingNamespace) {
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XmlStringBuilder sb = new XmlStringBuilder(this);
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sb.optAttribute(ATTR_CREATOR, creator);
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sb.optAttribute(ATTR_NAME, name);
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sb.rightAngleBracket();
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sb.element(file);
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sb.closeElement(this);
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return sb;
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}
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@Override
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public String getNamespace() {
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return JingleFileTransfer.NAMESPACE;
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}
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}
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