org.jivesoftware.smackx.jingle_filetransfer.element.Checksum Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of smack-experimental Show documentation

Smack experimental extensions. Classes and methods for XEPs that are in status 'experimental' or that should otherwise carefully considered for deployment. The API may change even between patch versions.

There is a newer version: 4.5.0-beta5

Show newest version

/**
 *
 * Copyright 2017 Paul Schaub
 *
 * 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.smackx.jingle_filetransfer.element;

import org.jivesoftware.smack.packet.ExtensionElement;
import org.jivesoftware.smack.util.Objects;
import org.jivesoftware.smack.util.XmlStringBuilder;

import org.jivesoftware.smackx.jingle.element.JingleContent;

/**
 * Checksum element.
 */
public class Checksum implements ExtensionElement {
    public static final String ELEMENT = "checksum";
    public static final String ATTR_CREATOR = "creator";
    public static final String ATTR_NAME = "name";

    private final JingleContent.Creator creator;
    private final String name;
    private final JingleFileTransferChild file;

    public Checksum(JingleContent.Creator creator, String name, JingleFileTransferChild file) {
        this.creator = creator;
        this.name = name;
        this.file = Objects.requireNonNull(file, "file MUST NOT be null.");
        Objects.requireNonNull(file.getHash(), "file MUST contain at least one hash element.");
    }

    @Override
    public String getElementName() {
        return ELEMENT;
    }

    @Override
    public CharSequence toXML(org.jivesoftware.smack.packet.XmlEnvironment enclosingNamespace) {
        XmlStringBuilder sb = new XmlStringBuilder(this);
        sb.optAttribute(ATTR_CREATOR, creator);
        sb.optAttribute(ATTR_NAME, name);
        sb.rightAngleBracket();
        sb.append(file);
        sb.closeElement(this);
        return sb;
    }

    @Override
    public String getNamespace() {
        return JingleFileTransfer.NAMESPACE_V5;
    }
}