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Apache Commons Compress software defines an API for working with
compression and archive formats. These include: bzip2, gzip, pack200,
lzma, xz, Snappy, traditional Unix Compress, DEFLATE, DEFLATE64, LZ4,
Brotli, Zstandard and ar, cpio, jar, tar, zip, dump, 7z, arj.
/*
* 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.commons.compress.archivers.dump;
import java.io.IOException;
import java.util.Date;
import java.util.Objects;
import org.apache.commons.compress.archivers.zip.ZipEncoding;
/**
* This class represents identifying information about a Dump archive volume.
* It consists the archive's dump date, label, hostname, device name and possibly
* last mount point plus the volume's volume id andfirst record number.
*
* For the corresponding C structure see the header of {@link DumpArchiveEntry}.
*
*/
public class DumpArchiveSummary {
private long dumpDate;
private long previousDumpDate;
private int volume;
private String label;
private int level;
private String filesys;
private String devname;
private String hostname;
private int flags;
private int firstrec;
private int ntrec;
DumpArchiveSummary(final byte[] buffer, final ZipEncoding encoding) throws IOException {
dumpDate = 1000L * DumpArchiveUtil.convert32(buffer, 4);
previousDumpDate = 1000L * DumpArchiveUtil.convert32(buffer, 8);
volume = DumpArchiveUtil.convert32(buffer, 12);
label = DumpArchiveUtil.decode(encoding, buffer, 676, DumpArchiveConstants.LBLSIZE).trim();
level = DumpArchiveUtil.convert32(buffer, 692);
filesys = DumpArchiveUtil.decode(encoding, buffer, 696, DumpArchiveConstants.NAMELEN).trim();
devname = DumpArchiveUtil.decode(encoding, buffer, 760, DumpArchiveConstants.NAMELEN).trim();
hostname = DumpArchiveUtil.decode(encoding, buffer, 824, DumpArchiveConstants.NAMELEN).trim();
flags = DumpArchiveUtil.convert32(buffer, 888);
firstrec = DumpArchiveUtil.convert32(buffer, 892);
ntrec = DumpArchiveUtil.convert32(buffer, 896);
//extAttributes = DumpArchiveUtil.convert32(buffer, 900);
}
@Override
public boolean equals(final Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
final DumpArchiveSummary other = (DumpArchiveSummary) obj;
return Objects.equals(devname, other.devname) && dumpDate == other.dumpDate && Objects.equals(hostname, other.hostname);
}
/**
* Get the device name, e.g., /dev/sda3 or /dev/mapper/vg0-home.
* @return device name
*/
public String getDevname() {
return devname;
}
/**
* Get the date of this dump.
* @return the date of this dump.
*/
public Date getDumpDate() {
return new Date(dumpDate);
}
/**
* Get the last mountpoint, e.g., /home.
* @return last mountpoint
*/
public String getFilesystem() {
return filesys;
}
/**
* Get the inode of the first record on this volume.
* @return inode of the first record on this volume.
*/
public int getFirstRecord() {
return firstrec;
}
/**
* Get the miscellaneous flags. See below.
* @return flags
*/
public int getFlags() {
return flags;
}
/**
* Get the hostname of the system where the dump was performed.
* @return hostname the host name
*/
public String getHostname() {
return hostname;
}
/**
* Get dump label. This may be autogenerated or it may be specified
* bu the user.
* @return dump label
*/
public String getLabel() {
return label;
}
/**
* Get the level of this dump. This is a number between 0 and 9, inclusive,
* and a level 0 dump is a complete dump of the partition. For any other dump
* 'n' this dump contains all files that have changed since the last dump
* at this level or lower. This is used to support different levels of
* incremental backups.
* @return dump level
*/
public int getLevel() {
return level;
}
/**
* Get the number of records per tape block. This is typically
* between 10 and 32.
* @return the number of records per tape block
*/
public int getNTRec() {
return ntrec;
}
/**
* Get the date of the previous dump at this level higher.
* @return dumpdate may be null
*/
public Date getPreviousDumpDate() {
return new Date(previousDumpDate);
}
/**
* Get volume (tape) number.
* @return volume (tape) number.
*/
public int getVolume() {
return volume;
}
@Override
public int hashCode() {
return Objects.hash(devname, dumpDate, hostname);
}
/**
* Is this volume compressed? N.B., individual blocks may or may not be compressed.
* The first block is never compressed.
* @return true if volume is compressed
*/
public boolean isCompressed() {
return (flags & 0x0080) == 0x0080;
}
/**
* Does this volume contain extended attributes.
* @return true if volume contains extended attributes.
*/
public boolean isExtendedAttributes() {
return (flags & 0x8000) == 0x8000;
}
/**
* Does this volume only contain metadata?
* @return true if volume only contains meta-data
*/
public boolean isMetaDataOnly() {
return (flags & 0x0100) == 0x0100;
}
/**
* Is this the new header format? (We do not currently support the
* old format.)
*
* @return true if using new header format
*/
public boolean isNewHeader() {
return (flags & 0x0001) == 0x0001;
}
/**
* Is this the new inode format? (We do not currently support the
* old format.)
* @return true if using new inode format
*/
public boolean isNewInode() {
return (flags & 0x0002) == 0x0002;
}
/**
* Set the device name.
* @param devname the device name
*/
public void setDevname(final String devname) {
this.devname = devname;
}
/**
* Set dump date.
* @param dumpDate the dump date
*/
public void setDumpDate(final Date dumpDate) {
this.dumpDate = dumpDate.getTime();
}
/**
* Set the last mountpoint.
* @param fileSystem the last mountpoint
*/
public void setFilesystem(final String fileSystem) {
this.filesys = fileSystem;
}
/**
* Set the inode of the first record.
* @param firstrec the first record
*/
public void setFirstRecord(final int firstrec) {
this.firstrec = firstrec;
}
/**
* Set the miscellaneous flags.
* @param flags flags
*/
public void setFlags(final int flags) {
this.flags = flags;
}
/**
* Set the hostname.
* @param hostname the host name
*/
public void setHostname(final String hostname) {
this.hostname = hostname;
}
/**
* Set dump label.
* @param label the label
*/
public void setLabel(final String label) {
this.label = label;
}
/**
* Set level.
* @param level the level
*/
public void setLevel(final int level) {
this.level = level;
}
/**
* Set the number of records per tape block.
* @param ntrec the number of records per tape block
*/
public void setNTRec(final int ntrec) {
this.ntrec = ntrec;
}
/**
* Set previous dump date.
* @param previousDumpDate the previous dump dat
*/
public void setPreviousDumpDate(final Date previousDumpDate) {
this.previousDumpDate = previousDumpDate.getTime();
}
/**
* Set volume (tape) number.
* @param volume the volume number
*/
public void setVolume(final int volume) {
this.volume = volume;
}
}