/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.sshd.common.subsystem.sftp.extensions;
import java.nio.charset.StandardCharsets;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import org.apache.sshd.common.subsystem.sftp.SftpConstants;
import org.apache.sshd.common.subsystem.sftp.extensions.VersionsParser.Versions;
import org.apache.sshd.common.util.GenericUtils;
/**
* @author <a href="mailto:dev@mina.apache.org">Apache MINA SSHD Project</a>
*/
public class VersionsParser extends AbstractParser<Versions> {
/**
* The "versions" extension data as per
* <A HREF="http://tools.ietf.org/wg/secsh/draft-ietf-secsh-filexfer/draft-ietf-secsh-filexfer-09.txt">DRAFT 09 Section 4.6</A>
*
* @author <a href="mailto:dev@mina.apache.org">Apache MINA SSHD Project</a>
*/
public static class Versions {
public static final char SEP = ',';
private List<String> versions;
public Versions() {
this(null);
}
public Versions(List<String> versions) {
this.versions = versions;
}
public List<String> getVersions() {
return versions;
}
public void setVersions(List<String> versions) {
this.versions = versions;
}
@Override
public String toString() {
return GenericUtils.join(getVersions(), ',');
}
}
public static final VersionsParser INSTANCE = new VersionsParser();
public VersionsParser() {
super(SftpConstants.EXT_VERSIONS);
}
@Override
public Versions parse(byte[] input, int offset, int len) {
return parse(new String(input, offset, len, StandardCharsets.UTF_8));
}
public Versions parse(String value) {
String[] comps = GenericUtils.split(value, Versions.SEP);
return new Versions(GenericUtils.isEmpty(comps) ? Collections.emptyList() : Arrays.asList(comps));
}
}