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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.zip;
import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.LinkOption;
import java.nio.file.Path;
import java.nio.file.attribute.BasicFileAttributes;
import java.nio.file.attribute.FileTime;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Date;
import java.util.List;
import java.util.NoSuchElementException;
import java.util.Objects;
import java.util.zip.ZipEntry;
import java.util.zip.ZipException;
import org.apache.commons.compress.archivers.ArchiveEntry;
import org.apache.commons.compress.archivers.EntryStreamOffsets;
import org.apache.commons.compress.utils.ByteUtils;
import org.apache.commons.compress.utils.TimeUtils;
/**
* Extension that adds better handling of extra fields and provides
* access to the internal and external file attributes.
*
* The extra data is expected to follow the recommendation of
* APPNOTE.TXT:
*
* - the extra byte array consists of a sequence of extra fields
* - each extra fields starts by a two byte header id followed by
* a two byte sequence holding the length of the remainder of
* data.
*
*
* Any extra data that cannot be parsed by the rules above will be
* consumed as "unparseable" extra data and treated differently by the
* methods of this class. Versions prior to Apache Commons Compress
* 1.1 would have thrown an exception if any attempt was made to read
* or write extra data not conforming to the recommendation.
*
* @NotThreadSafe
*/
public class ZipArchiveEntry extends java.util.zip.ZipEntry implements ArchiveEntry, EntryStreamOffsets {
/**
* Indicates how the comment of this entry has been determined.
* @since 1.16
*/
public enum CommentSource {
/**
* The comment has been read from the archive using the encoding
* of the archive specified when creating the {@link
* ZipArchiveInputStream} or {@link ZipFile} (defaults to the
* platform's default encoding).
*/
COMMENT,
/**
* The comment has been read from an {@link UnicodeCommentExtraField
* Unicode Extra Field}.
*/
UNICODE_EXTRA_FIELD
}
/**
* How to try to parse the extra fields.
*
* Configures the behavior for:
*
* - What shall happen if the extra field content doesn't
* follow the recommended pattern of two-byte id followed by a
* two-byte length?
* - What shall happen if an extra field is generally supported
* by Commons Compress but its content cannot be parsed
* correctly? This may for example happen if the archive is
* corrupt, it triggers a bug in Commons Compress or the extra
* field uses a version not (yet) supported by Commons
* Compress.
*
*
* @since 1.19
*/
public enum ExtraFieldParsingMode implements ExtraFieldParsingBehavior {
/**
* Try to parse as many extra fields as possible and wrap
* unknown extra fields as well as supported extra fields that
* cannot be parsed in {@link UnrecognizedExtraField}.
*
* Wrap extra data that doesn't follow the recommended
* pattern in an {@link UnparseableExtraFieldData}
* instance.
*
* This is the default behavior starting with Commons Compress 1.19.
*/
BEST_EFFORT(ExtraFieldUtils.UnparseableExtraField.READ) {
@Override
public ZipExtraField fill(final ZipExtraField field, final byte[] data, final int off, final int len, final boolean local) {
return fillAndMakeUnrecognizedOnError(field, data, off, len, local);
}
},
/**
* Try to parse as many extra fields as possible and wrap
* unknown extra fields in {@link UnrecognizedExtraField}.
*
* Wrap extra data that doesn't follow the recommended
* pattern in an {@link UnparseableExtraFieldData}
* instance.
*
* Throw an exception if an extra field that is generally
* supported cannot be parsed.
*
* This used to be the default behavior prior to Commons
* Compress 1.19.
*/
STRICT_FOR_KNOW_EXTRA_FIELDS(ExtraFieldUtils.UnparseableExtraField.READ),
/**
* Try to parse as many extra fields as possible and wrap
* unknown extra fields as well as supported extra fields that
* cannot be parsed in {@link UnrecognizedExtraField}.
*
* Ignore extra data that doesn't follow the recommended
* pattern.
*/
ONLY_PARSEABLE_LENIENT(ExtraFieldUtils.UnparseableExtraField.SKIP) {
@Override
public ZipExtraField fill(final ZipExtraField field, final byte[] data, final int off, final int len, final boolean local) {
return fillAndMakeUnrecognizedOnError(field, data, off, len, local);
}
},
/**
* Try to parse as many extra fields as possible and wrap
* unknown extra fields in {@link UnrecognizedExtraField}.
*
* Ignore extra data that doesn't follow the recommended
* pattern.
*
* Throw an exception if an extra field that is generally
* supported cannot be parsed.
*/
ONLY_PARSEABLE_STRICT(ExtraFieldUtils.UnparseableExtraField.SKIP),
/**
* Throw an exception if any of the recognized extra fields
* cannot be parsed or any extra field violates the
* recommended pattern.
*/
DRACONIC(ExtraFieldUtils.UnparseableExtraField.THROW);
private static ZipExtraField fillAndMakeUnrecognizedOnError(final ZipExtraField field, final byte[] data, final int off,
final int len, final boolean local) {
try {
return ExtraFieldUtils.fillExtraField(field, data, off, len, local);
} catch (final ZipException ex) {
final UnrecognizedExtraField u = new UnrecognizedExtraField();
u.setHeaderId(field.getHeaderId());
if (local) {
u.setLocalFileDataData(Arrays.copyOfRange(data, off, off + len));
} else {
u.setCentralDirectoryData(Arrays.copyOfRange(data, off, off + len));
}
return u;
}
}
private final ExtraFieldUtils.UnparseableExtraField onUnparseableData;
ExtraFieldParsingMode(final ExtraFieldUtils.UnparseableExtraField onUnparseableData) {
this.onUnparseableData = onUnparseableData;
}
@Override
public ZipExtraField createExtraField(final ZipShort headerId)
throws ZipException, InstantiationException, IllegalAccessException {
return ExtraFieldUtils.createExtraField(headerId);
}
@Override
public ZipExtraField fill(final ZipExtraField field, final byte[] data, final int off, final int len, final boolean local)
throws ZipException {
return ExtraFieldUtils.fillExtraField(field, data, off, len, local);
}
@Override
public ZipExtraField onUnparseableExtraField(final byte[] data, final int off, final int len, final boolean local,
final int claimedLength) throws ZipException {
return onUnparseableData.onUnparseableExtraField(data, off, len, local, claimedLength);
}
}
/**
* Indicates how the name of this entry has been determined.
* @since 1.16
*/
public enum NameSource {
/**
* The name has been read from the archive using the encoding
* of the archive specified when creating the {@link
* ZipArchiveInputStream} or {@link ZipFile} (defaults to the
* platform's default encoding).
*/
NAME,
/**
* The name has been read from the archive and the archive
* specified the EFS flag which indicates the name has been
* encoded as UTF-8.
*/
NAME_WITH_EFS_FLAG,
/**
* The name has been read from an {@link UnicodePathExtraField
* Unicode Extra Field}.
*/
UNICODE_EXTRA_FIELD
}
static final ZipArchiveEntry[] EMPTY_ARRAY = {};
public static final int PLATFORM_UNIX = 3;
public static final int PLATFORM_FAT = 0;
public static final int CRC_UNKNOWN = -1;
private static final int SHORT_MASK = 0xFFFF;
private static final int SHORT_SHIFT = 16;
private static boolean canConvertToInfoZipExtendedTimestamp(
final FileTime lastModifiedTime,
final FileTime lastAccessTime,
final FileTime creationTime) {
return TimeUtils.isUnixTime(lastModifiedTime)
&& TimeUtils.isUnixTime(lastAccessTime)
&& TimeUtils.isUnixTime(creationTime);
}
/**
* The {@link java.util.zip.ZipEntry} base class only supports
* the compression methods STORED and DEFLATED. We override the
* field so that any compression methods can be used.
*
* The default value -1 means that the method has not been specified.
*
* @see COMPRESS-93
*/
private int method = ZipMethod.UNKNOWN_CODE;
/**
* The {@link java.util.zip.ZipEntry#setSize} method in the base
* class throws an IllegalArgumentException if the size is bigger
* than 2GB for Java versions < 7 and even in Java 7+ if the
* implementation in java.util.zip doesn't support Zip64 itself
* (it is an optional feature).
*
*
We need to keep our own size information for Zip64 support.
*/
private long size = SIZE_UNKNOWN;
private int internalAttributes;
private int versionRequired;
private int versionMadeBy;
private int platform = PLATFORM_FAT;
private int rawFlag;
private long externalAttributes;
private int alignment;
private ZipExtraField[] extraFields;
private UnparseableExtraFieldData unparseableExtra;
private String name;
private byte[] rawName;
private GeneralPurposeBit gpb = new GeneralPurposeBit();
private long localHeaderOffset = OFFSET_UNKNOWN;
private long dataOffset = OFFSET_UNKNOWN;
private boolean isStreamContiguous;
private NameSource nameSource = NameSource.NAME;
private CommentSource commentSource = CommentSource.COMMENT;
private long diskNumberStart;
private boolean lastModifiedDateSet = false;
private long time = -1;
/**
*/
protected ZipArchiveEntry() {
this("");
}
/**
* Creates a new ZIP entry taking some information from the given
* file and using the provided name.
*
* The name will be adjusted to end with a forward slash "/" if
* the file is a directory. If the file is not a directory a
* potential trailing forward slash will be stripped from the
* entry name.
* @param inputFile file to create the entry from
* @param entryName name of the entry
*/
public ZipArchiveEntry(final File inputFile, final String entryName) {
this(inputFile.isDirectory() && !entryName.endsWith("/") ?
entryName + "/" : entryName);
try {
setAttributes(inputFile.toPath());
} catch (IOException e) { // NOSONAR
if (inputFile.isFile()){
setSize(inputFile.length());
}
setTime(inputFile.lastModified());
}
}
/**
* Creates a new ZIP entry with fields taken from the specified ZIP entry.
*
* Assumes the entry represents a directory if and only if the
* name ends with a forward slash "/".
*
* @param entry the entry to get fields from
* @throws ZipException on error
*/
public ZipArchiveEntry(final java.util.zip.ZipEntry entry) throws ZipException {
super(entry);
setName(entry.getName());
final byte[] extra = entry.getExtra();
if (extra != null) {
setExtraFields(ExtraFieldUtils.parse(extra, true, ExtraFieldParsingMode.BEST_EFFORT));
} else {
// initializes extra data to an empty byte array
setExtra();
}
setMethod(entry.getMethod());
this.size = entry.getSize();
}
/**
* Creates a new ZIP entry taking some information from the given
* path and using the provided name.
*
* The name will be adjusted to end with a forward slash "/" if
* the file is a directory. If the file is not a directory a
* potential trailing forward slash will be stripped from the
* entry name.
* @param inputPath path to create the entry from.
* @param entryName name of the entry.
* @param options options indicating how symbolic links are handled.
* @throws IOException if an I/O error occurs.
* @since 1.21
*/
public ZipArchiveEntry(final Path inputPath, final String entryName, final LinkOption... options) throws IOException {
this(Files.isDirectory(inputPath, options) && !entryName.endsWith("/") ?
entryName + "/" : entryName);
setAttributes(inputPath, options);
}
/**
* Creates a new ZIP entry with the specified name.
*
* Assumes the entry represents a directory if and only if the
* name ends with a forward slash "/".
*
* @param name the name of the entry
*/
public ZipArchiveEntry(final String name) {
super(name);
setName(name);
}
/**
* Creates a new ZIP entry with fields taken from the specified ZIP entry.
*
* Assumes the entry represents a directory if and only if the
* name ends with a forward slash "/".
*
* @param entry the entry to get fields from
* @throws ZipException on error
*/
public ZipArchiveEntry(final ZipArchiveEntry entry) throws ZipException {
this((java.util.zip.ZipEntry) entry);
setInternalAttributes(entry.getInternalAttributes());
setExternalAttributes(entry.getExternalAttributes());
setExtraFields(entry.getAllExtraFieldsNoCopy());
setPlatform(entry.getPlatform());
final GeneralPurposeBit other = entry.getGeneralPurposeBit();
setGeneralPurposeBit(other == null ? null :
(GeneralPurposeBit) other.clone());
}
/**
* Adds an extra field - replacing an already present extra field
* of the same type.
*
* The new extra field will be the first one.
* @param ze an extra field
*/
public void addAsFirstExtraField(final ZipExtraField ze) {
if (ze instanceof UnparseableExtraFieldData) {
unparseableExtra = (UnparseableExtraFieldData) ze;
} else {
if (getExtraField(ze.getHeaderId()) != null) {
internalRemoveExtraField(ze.getHeaderId());
}
final ZipExtraField[] copy = extraFields;
final int newLen = extraFields != null ? extraFields.length + 1 : 1;
extraFields = new ZipExtraField[newLen];
extraFields[0] = ze;
if (copy != null){
System.arraycopy(copy, 0, extraFields, 1, extraFields.length - 1);
}
}
setExtra();
}
/**
* Adds an extra field - replacing an already present extra field
* of the same type.
*
* If no extra field of the same type exists, the field will be
* added as last field.
* @param ze an extra field
*/
public void addExtraField(final ZipExtraField ze) {
internalAddExtraField(ze);
setExtra();
}
private void addInfoZipExtendedTimestamp(
final FileTime lastModifiedTime,
final FileTime lastAccessTime,
final FileTime creationTime) {
final X5455_ExtendedTimestamp infoZipTimestamp = new X5455_ExtendedTimestamp();
if (lastModifiedTime != null) {
infoZipTimestamp.setModifyFileTime(lastModifiedTime);
}
if (lastAccessTime != null) {
infoZipTimestamp.setAccessFileTime(lastAccessTime);
}
if (creationTime != null) {
infoZipTimestamp.setCreateFileTime(creationTime);
}
internalAddExtraField(infoZipTimestamp);
}
private void addNTFSTimestamp(
final FileTime lastModifiedTime,
final FileTime lastAccessTime,
final FileTime creationTime) {
final X000A_NTFS ntfsTimestamp = new X000A_NTFS();
if (lastModifiedTime != null) {
ntfsTimestamp.setModifyFileTime(lastModifiedTime);
}
if (lastAccessTime != null) {
ntfsTimestamp.setAccessFileTime(lastAccessTime);
}
if (creationTime != null) {
ntfsTimestamp.setCreateFileTime(creationTime);
}
internalAddExtraField(ntfsTimestamp);
}
/**
* Overwrite clone.
* @return a cloned copy of this ZipArchiveEntry
*/
@Override
public Object clone() {
final ZipArchiveEntry e = (ZipArchiveEntry) super.clone();
e.setInternalAttributes(getInternalAttributes());
e.setExternalAttributes(getExternalAttributes());
e.setExtraFields(getAllExtraFieldsNoCopy());
return e;
}
private ZipExtraField[] copyOf(final ZipExtraField[] src, final int length) {
return Arrays.copyOf(src, length);
}
@Override
public boolean equals(final Object obj) {
if (this == obj) {
return true;
}
if (obj == null || getClass() != obj.getClass()) {
return false;
}
final ZipArchiveEntry other = (ZipArchiveEntry) obj;
final String myName = getName();
final String otherName = other.getName();
if (!Objects.equals(myName, otherName)) {
return false;
}
String myComment = getComment();
String otherComment = other.getComment();
if (myComment == null) {
myComment = "";
}
if (otherComment == null) {
otherComment = "";
}
return Objects.equals(getLastModifiedTime(), other.getLastModifiedTime())
&& Objects.equals(getLastAccessTime(), other.getLastAccessTime())
&& Objects.equals(getCreationTime(), other.getCreationTime())
&& myComment.equals(otherComment)
&& getInternalAttributes() == other.getInternalAttributes()
&& getPlatform() == other.getPlatform()
&& getExternalAttributes() == other.getExternalAttributes()
&& getMethod() == other.getMethod()
&& getSize() == other.getSize()
&& getCrc() == other.getCrc()
&& getCompressedSize() == other.getCompressedSize()
&& Arrays.equals(getCentralDirectoryExtra(),
other.getCentralDirectoryExtra())
&& Arrays.equals(getLocalFileDataExtra(),
other.getLocalFileDataExtra())
&& localHeaderOffset == other.localHeaderOffset
&& dataOffset == other.dataOffset
&& gpb.equals(other.gpb);
}
private ZipExtraField findMatching(final ZipShort headerId, final List fs) {
return fs.stream().filter(f -> headerId.equals(f.getHeaderId())).findFirst().orElse(null);
}
private ZipExtraField findUnparseable(final List fs) {
return fs.stream().filter(UnparseableExtraFieldData.class::isInstance).findFirst().orElse(null);
}
/**
* Gets currently configured alignment.
*
* @return
* alignment for this entry.
* @since 1.14
*/
protected int getAlignment() {
return this.alignment;
}
private ZipExtraField[] getAllExtraFields() {
final ZipExtraField[] allExtraFieldsNoCopy = getAllExtraFieldsNoCopy();
return (allExtraFieldsNoCopy == extraFields) ? copyOf(allExtraFieldsNoCopy, allExtraFieldsNoCopy.length)
: allExtraFieldsNoCopy;
}
/**
* Get all extra fields, including unparseable ones.
* @return An array of all extra fields. Not necessarily a copy of internal data structures, hence private method
*/
private ZipExtraField[] getAllExtraFieldsNoCopy() {
if (extraFields == null) {
return getUnparseableOnly();
}
return unparseableExtra != null ? getMergedFields() : extraFields;
}
/**
* Retrieves the extra data for the central directory.
* @return the central directory extra data
*/
public byte[] getCentralDirectoryExtra() {
return ExtraFieldUtils.mergeCentralDirectoryData(getAllExtraFieldsNoCopy());
}
/**
* The source of the comment field value.
* @return source of the comment field value
* @since 1.16
*/
public CommentSource getCommentSource() {
return commentSource;
}
@Override
public long getDataOffset() {
return dataOffset;
}
/**
* The number of the split segment this entry starts at.
*
* @return the number of the split segment this entry starts at.
* @since 1.20
*/
public long getDiskNumberStart() {
return diskNumberStart;
}
/**
* Retrieves the external file attributes.
*
* Note: {@link ZipArchiveInputStream} is unable to fill
* this field, you must use {@link ZipFile} if you want to read
* entries using this attribute.
*
* @return the external file attributes
*/
public long getExternalAttributes() {
return externalAttributes;
}
/**
* Looks up an extra field by its header id.
*
* @param type the header id
* @return null if no such field exists.
*/
public ZipExtraField getExtraField(final ZipShort type) {
if (extraFields != null) {
for (final ZipExtraField extraField : extraFields) {
if (type.equals(extraField.getHeaderId())) {
return extraField;
}
}
}
return null;
}
/**
* Retrieves all extra fields that have been parsed successfully.
*
* Note: The set of extra fields may be incomplete when
* {@link ZipArchiveInputStream} has been used as some extra
* fields use the central directory to store additional
* information.
*
* @return an array of the extra fields
*/
public ZipExtraField[] getExtraFields() {
return getParseableExtraFields();
}
/**
* Retrieves extra fields.
* @param includeUnparseable whether to also return unparseable
* extra fields as {@link UnparseableExtraFieldData} if such data
* exists.
* @return an array of the extra fields
*
* @since 1.1
*/
public ZipExtraField[] getExtraFields(final boolean includeUnparseable) {
return includeUnparseable ?
getAllExtraFields() :
getParseableExtraFields();
}
/**
* Retrieves extra fields.
* @param parsingBehavior controls parsing of extra fields.
* @return an array of the extra fields
*
* @throws ZipException if parsing fails, can not happen if {@code
* parsingBehavior} is {@link ExtraFieldParsingMode#BEST_EFFORT}.
*
* @since 1.19
*/
public ZipExtraField[] getExtraFields(final ExtraFieldParsingBehavior parsingBehavior)
throws ZipException {
if (parsingBehavior == ExtraFieldParsingMode.BEST_EFFORT) {
return getExtraFields(true);
}
if (parsingBehavior == ExtraFieldParsingMode.ONLY_PARSEABLE_LENIENT) {
return getExtraFields(false);
}
final byte[] local = getExtra();
final List localFields = new ArrayList<>(Arrays.asList(ExtraFieldUtils.parse(local, true,
parsingBehavior)));
final byte[] central = getCentralDirectoryExtra();
final List centralFields = new ArrayList<>(Arrays.asList(ExtraFieldUtils.parse(central, false,
parsingBehavior)));
final List merged = new ArrayList<>();
for (final ZipExtraField l : localFields) {
ZipExtraField c = null;
if (l instanceof UnparseableExtraFieldData) {
c = findUnparseable(centralFields);
} else {
c = findMatching(l.getHeaderId(), centralFields);
}
if (c != null) {
final byte[] cd = c.getCentralDirectoryData();
if (cd != null && cd.length > 0) {
l.parseFromCentralDirectoryData(cd, 0, cd.length);
}
centralFields.remove(c);
}
merged.add(l);
}
merged.addAll(centralFields);
return merged.toArray(ExtraFieldUtils.EMPTY_ZIP_EXTRA_FIELD_ARRAY);
}
/**
* The "general purpose bit" field.
* @return the general purpose bit
* @since 1.1
*/
public GeneralPurposeBit getGeneralPurposeBit() {
return gpb;
}
/**
* Retrieves the internal file attributes.
*
* Note: {@link ZipArchiveInputStream} is unable to fill
* this field, you must use {@link ZipFile} if you want to read
* entries using this attribute.
*
* @return the internal file attributes
*/
public int getInternalAttributes() {
return internalAttributes;
}
/**
* Wraps {@link java.util.zip.ZipEntry#getTime} with a {@link Date} as the
* entry's last modified date.
*
* Changes to the implementation of {@link java.util.zip.ZipEntry#getTime}
* leak through and the returned value may depend on your local
* time zone as well as your version of Java.
*/
@Override
public Date getLastModifiedDate() {
return new Date(getTime());
}
/**
* Retrieves the extra data for the local file data.
* @return the extra data for local file
*/
public byte[] getLocalFileDataExtra() {
final byte[] extra = getExtra();
return extra != null ? extra : ByteUtils.EMPTY_BYTE_ARRAY;
}
protected long getLocalHeaderOffset() {
return this.localHeaderOffset;
}
private ZipExtraField[] getMergedFields() {
final ZipExtraField[] zipExtraFields = copyOf(extraFields, extraFields.length + 1);
zipExtraFields[extraFields.length] = unparseableExtra;
return zipExtraFields;
}
/**
* Returns the compression method of this entry, or -1 if the
* compression method has not been specified.
*
* @return compression method
*
* @since 1.1
*/
@Override
public int getMethod() {
return method;
}
/**
* Get the name of the entry.
*
* This method returns the raw name as it is stored inside of the archive.
*
* @return the entry name
*/
@Override
public String getName() {
return name == null ? super.getName() : name;
}
/**
* The source of the name field value.
* @return source of the name field value
* @since 1.16
*/
public NameSource getNameSource() {
return nameSource;
}
private ZipExtraField[] getParseableExtraFields() {
final ZipExtraField[] parseableExtraFields = getParseableExtraFieldsNoCopy();
return (parseableExtraFields == extraFields) ? copyOf(parseableExtraFields, parseableExtraFields.length)
: parseableExtraFields;
}
private ZipExtraField[] getParseableExtraFieldsNoCopy() {
if (extraFields == null) {
return ExtraFieldUtils.EMPTY_ZIP_EXTRA_FIELD_ARRAY;
}
return extraFields;
}
/**
* Platform specification to put into the "version made
* by" part of the central file header.
*
* @return PLATFORM_FAT unless {@link #setUnixMode setUnixMode}
* has been called, in which case PLATFORM_UNIX will be returned.
*/
public int getPlatform() {
return platform;
}
/**
* The content of the flags field.
* @return content of the flags field
* @since 1.11
*/
public int getRawFlag() {
return rawFlag;
}
/**
* Returns the raw bytes that made up the name before it has been
* converted using the configured or guessed encoding.
*
* This method will return null if this instance has not been
* read from an archive.
*
* @return the raw name bytes
* @since 1.2
*/
public byte[] getRawName() {
if (rawName != null) {
return Arrays.copyOf(rawName, rawName.length);
}
return null;
}
/**
* Gets the uncompressed size of the entry data.
*
* Note: {@link ZipArchiveInputStream} may create
* entries that return {@link #SIZE_UNKNOWN SIZE_UNKNOWN} as long
* as the entry hasn't been read completely.
*
* @return the entry size
*/
@Override
public long getSize() {
return size;
}
/**
* {@inheritDoc}
*
* Override to work around bug JDK-8130914
*
* @return The last modification time of the entry in milliseconds
* since the epoch, or -1 if not specified
*
* @see #setTime(long)
* @see #setLastModifiedTime(FileTime)
*/
@Override
public long getTime() {
if (lastModifiedDateSet) {
return getLastModifiedTime().toMillis();
}
return time != -1 ? time : super.getTime();
}
/**
* Unix permission.
* @return the unix permissions
*/
public int getUnixMode() {
return platform != PLATFORM_UNIX ? 0 :
(int) ((getExternalAttributes() >> SHORT_SHIFT) & SHORT_MASK);
}
/**
* Looks up extra field data that couldn't be parsed correctly.
*
* @return null if no such field exists.
*
* @since 1.1
*/
public UnparseableExtraFieldData getUnparseableExtraFieldData() {
return unparseableExtra;
}
private ZipExtraField[] getUnparseableOnly() {
return unparseableExtra == null ? ExtraFieldUtils.EMPTY_ZIP_EXTRA_FIELD_ARRAY : new ZipExtraField[] { unparseableExtra };
}
/**
* The "version made by" field.
* @return "version made by" field
* @since 1.11
*/
public int getVersionMadeBy() {
return versionMadeBy;
}
/**
* The "version required to expand" field.
* @return "version required to expand" field
* @since 1.11
*/
public int getVersionRequired() {
return versionRequired;
}
/**
* Get the hash code of the entry.
* This uses the name as the hash code.
* @return a hash code.
*/
@Override
public int hashCode() {
// this method has severe consequences on performance. We cannot rely
// on the super.hashCode() method since super.getName() always return
// the empty string in the current implementation (there's no setter)
// so it is basically draining the performance of a hashmap lookup
return getName().hashCode();
}
private void internalAddExtraField(final ZipExtraField ze) {
if (ze instanceof UnparseableExtraFieldData) {
unparseableExtra = (UnparseableExtraFieldData) ze;
} else if (extraFields == null) {
extraFields = new ZipExtraField[]{ze};
} else {
if (getExtraField(ze.getHeaderId()) != null) {
internalRemoveExtraField(ze.getHeaderId());
}
final ZipExtraField[] zipExtraFields = copyOf(extraFields, extraFields.length + 1);
zipExtraFields[zipExtraFields.length - 1] = ze;
extraFields = zipExtraFields;
}
}
private void internalRemoveExtraField(final ZipShort type) {
if (extraFields == null) {
return;
}
final List newResult = new ArrayList<>();
for (final ZipExtraField extraField : extraFields) {
if (!type.equals(extraField.getHeaderId())) {
newResult.add(extraField);
}
}
if (extraFields.length == newResult.size()) {
return;
}
extraFields = newResult.toArray(ExtraFieldUtils.EMPTY_ZIP_EXTRA_FIELD_ARRAY);
}
private void internalSetLastModifiedTime(final FileTime time) {
super.setLastModifiedTime(time);
this.time = time.toMillis();
lastModifiedDateSet = true;
}
/**
* Is this entry a directory?
* @return true if the entry is a directory
*/
@Override
public boolean isDirectory() {
return getName().endsWith("/");
}
@Override
public boolean isStreamContiguous() {
return isStreamContiguous;
}
/**
* Returns true if this entry represents a unix symlink,
* in which case the entry's content contains the target path
* for the symlink.
*
* @since 1.5
* @return true if the entry represents a unix symlink, false otherwise.
*/
public boolean isUnixSymlink() {
return (getUnixMode() & UnixStat.FILE_TYPE_FLAG) == UnixStat.LINK_FLAG;
}
/**
* If there are no extra fields, use the given fields as new extra
* data - otherwise merge the fields assuming the existing fields
* and the new fields stem from different locations inside the
* archive.
* @param f the extra fields to merge
* @param local whether the new fields originate from local data
*/
private void mergeExtraFields(final ZipExtraField[] f, final boolean local) {
if (extraFields == null) {
setExtraFields(f);
} else {
for (final ZipExtraField element : f) {
final ZipExtraField existing;
if (element instanceof UnparseableExtraFieldData) {
existing = unparseableExtra;
} else {
existing = getExtraField(element.getHeaderId());
}
if (existing == null) {
internalAddExtraField(element);
} else {
final byte[] b = local ? element.getLocalFileDataData()
: element.getCentralDirectoryData();
try {
if (local) {
existing.parseFromLocalFileData(b, 0, b.length);
} else {
existing.parseFromCentralDirectoryData(b, 0, b.length);
}
} catch (final ZipException ex) {
// emulate ExtraFieldParsingMode.fillAndMakeUnrecognizedOnError
final UnrecognizedExtraField u = new UnrecognizedExtraField();
u.setHeaderId(existing.getHeaderId());
if (local) {
u.setLocalFileDataData(b);
u.setCentralDirectoryData(existing.getCentralDirectoryData());
} else {
u.setLocalFileDataData(existing.getLocalFileDataData());
u.setCentralDirectoryData(b);
}
internalRemoveExtraField(existing.getHeaderId());
internalAddExtraField(u);
}
}
}
setExtra();
}
}
/**
* Remove an extra field.
* @param type the type of extra field to remove
*/
public void removeExtraField(final ZipShort type) {
if (getExtraField(type) == null) {
throw new NoSuchElementException();
}
internalRemoveExtraField(type);
setExtra();
}
/**
* Removes unparseable extra field data.
*
* @since 1.1
*/
public void removeUnparseableExtraFieldData() {
if (unparseableExtra == null) {
throw new NoSuchElementException();
}
unparseableExtra = null;
setExtra();
}
private boolean requiresExtraTimeFields() {
if (getLastAccessTime() != null || getCreationTime() != null) {
return true;
}
return lastModifiedDateSet;
}
/**
* Sets alignment for this entry.
*
* @param alignment
* requested alignment, 0 for default.
* @since 1.14
*/
public void setAlignment(final int alignment) {
if ((alignment & (alignment - 1)) != 0 || alignment > 0xffff) {
throw new IllegalArgumentException("Invalid value for alignment, must be power of two and no bigger than "
+ 0xffff + " but is " + alignment);
}
this.alignment = alignment;
}
private void setAttributes(final Path inputPath, final LinkOption... options) throws IOException {
final BasicFileAttributes attributes = Files.readAttributes(inputPath, BasicFileAttributes.class, options);
if (attributes.isRegularFile()) {
setSize(attributes.size());
}
super.setLastModifiedTime(attributes.lastModifiedTime());
super.setCreationTime(attributes.creationTime());
super.setLastAccessTime(attributes.lastAccessTime());
setExtraTimeFields();
}
/**
* Sets the central directory part of extra fields.
* @param b an array of bytes to be parsed into extra fields
*/
public void setCentralDirectoryExtra(final byte[] b) {
try {
mergeExtraFields(ExtraFieldUtils.parse(b, false, ExtraFieldParsingMode.BEST_EFFORT), false);
} catch (final ZipException e) {
// actually this is not possible as of Commons Compress 1.19
throw new IllegalArgumentException(e.getMessage(), e); // NOSONAR
}
}
/**
* Sets the source of the comment field value.
* @param commentSource source of the comment field value
* @since 1.16
*/
public void setCommentSource(final CommentSource commentSource) {
this.commentSource = commentSource;
}
@Override
public ZipEntry setCreationTime(final FileTime time) {
super.setCreationTime(time);
setExtraTimeFields();
return this;
}
/* (non-Javadoc)
* @see Object#equals(Object)
*/
/**
* Sets the data offset.
*
* @param dataOffset
* new value of data offset.
*/
protected void setDataOffset(final long dataOffset) {
this.dataOffset = dataOffset;
}
/**
* The number of the split segment this entry starts at.
*
* @param diskNumberStart the number of the split segment this entry starts at.
* @since 1.20
*/
public void setDiskNumberStart(final long diskNumberStart) {
this.diskNumberStart = diskNumberStart;
}
/**
* Sets the external file attributes.
* @param value an {@code long} value
*/
public void setExternalAttributes(final long value) {
externalAttributes = value;
}
/**
* Unfortunately {@link java.util.zip.ZipOutputStream} seems to
* access the extra data directly, so overriding getExtra doesn't
* help - we need to modify super's data directly and on every update.
*/
protected void setExtra() {
// ZipEntry will update the time fields here, so we need to reprocess them afterwards
super.setExtra(ExtraFieldUtils.mergeLocalFileDataData(getAllExtraFieldsNoCopy()));
// Reprocess and overwrite the modifications made by ZipEntry#setExtra(byte[])
updateTimeFieldsFromExtraFields();
}
/**
* Parses the given bytes as extra field data and consumes any
* unparseable data as an {@link UnparseableExtraFieldData}
* instance.
* @param extra an array of bytes to be parsed into extra fields
* @throws RuntimeException if the bytes cannot be parsed
* @throws RuntimeException on error
*/
@Override
public void setExtra(final byte[] extra) throws RuntimeException {
try {
mergeExtraFields(ExtraFieldUtils.parse(extra, true, ExtraFieldParsingMode.BEST_EFFORT), true);
} catch (final ZipException e) {
// actually this is not possible as of Commons Compress 1.1
throw new IllegalArgumentException("Error parsing extra fields for entry: " // NOSONAR
+ getName() + " - " + e.getMessage(), e);
}
}
/**
* Replaces all currently attached extra fields with the new array.
* @param fields an array of extra fields
*/
public void setExtraFields(final ZipExtraField[] fields) {
unparseableExtra = null;
final List newFields = new ArrayList<>();
if (fields != null) {
for (final ZipExtraField field : fields) {
if (field instanceof UnparseableExtraFieldData) {
unparseableExtra = (UnparseableExtraFieldData) field;
} else {
newFields.add(field);
}
}
}
extraFields = newFields.toArray(ExtraFieldUtils.EMPTY_ZIP_EXTRA_FIELD_ARRAY);
setExtra();
}
private void setExtraTimeFields() {
if (getExtraField(X5455_ExtendedTimestamp.HEADER_ID) != null) {
internalRemoveExtraField(X5455_ExtendedTimestamp.HEADER_ID);
}
if (getExtraField(X000A_NTFS.HEADER_ID) != null) {
internalRemoveExtraField(X000A_NTFS.HEADER_ID);
}
if (requiresExtraTimeFields()) {
final FileTime lastModifiedTime = getLastModifiedTime();
final FileTime lastAccessTime = getLastAccessTime();
final FileTime creationTime = getCreationTime();
if (canConvertToInfoZipExtendedTimestamp(lastModifiedTime, lastAccessTime, creationTime)) {
addInfoZipExtendedTimestamp(lastModifiedTime, lastAccessTime, creationTime);
}
addNTFSTimestamp(lastModifiedTime, lastAccessTime, creationTime);
}
setExtra();
}
/**
* The "general purpose bit" field.
* @param b the general purpose bit
* @since 1.1
*/
public void setGeneralPurposeBit(final GeneralPurposeBit b) {
gpb = b;
}
/**
* Sets the internal file attributes.
* @param value an {@code int} value
*/
public void setInternalAttributes(final int value) {
internalAttributes = value;
}
@Override
public ZipEntry setLastAccessTime(final FileTime time) {
super.setLastAccessTime(time);
setExtraTimeFields();
return this;
}
@Override
public ZipEntry setLastModifiedTime(final FileTime time) {
internalSetLastModifiedTime(time);
setExtraTimeFields();
return this;
}
protected void setLocalHeaderOffset(final long localHeaderOffset) {
this.localHeaderOffset = localHeaderOffset;
}
/**
* Sets the compression method of this entry.
*
* @param method compression method
*
* @since 1.1
*/
@Override
public void setMethod(final int method) {
if (method < 0) {
throw new IllegalArgumentException(
"ZIP compression method can not be negative: " + method);
}
this.method = method;
}
/**
* Set the name of the entry.
* @param name the name to use
*/
protected void setName(String name) {
if (name != null && getPlatform() == PLATFORM_FAT
&& !name.contains("/")) {
name = name.replace('\\', '/');
}
this.name = name;
}
/**
* Sets the name using the raw bytes and the string created from
* it by guessing or using the configured encoding.
* @param name the name to use created from the raw bytes using
* the guessed or configured encoding
* @param rawName the bytes originally read as name from the
* archive
* @since 1.2
*/
protected void setName(final String name, final byte[] rawName) {
setName(name);
this.rawName = rawName;
}
/**
* Sets the source of the name field value.
* @param nameSource source of the name field value
* @since 1.16
*/
public void setNameSource(final NameSource nameSource) {
this.nameSource = nameSource;
}
/**
* Set the platform (UNIX or FAT).
* @param platform an {@code int} value - 0 is FAT, 3 is UNIX
*/
protected void setPlatform(final int platform) {
this.platform = platform;
}
/**
* Sets the content of the flags field.
* @param rawFlag content of the flags field
* @since 1.11
*/
public void setRawFlag(final int rawFlag) {
this.rawFlag = rawFlag;
}
/**
* Sets the uncompressed size of the entry data.
* @param size the uncompressed size in bytes
* @throws IllegalArgumentException if the specified size is less
* than 0
*/
@Override
public void setSize(final long size) {
if (size < 0) {
throw new IllegalArgumentException("Invalid entry size");
}
this.size = size;
}
protected void setStreamContiguous(final boolean isStreamContiguous) {
this.isStreamContiguous = isStreamContiguous;
}
/**
* Sets the modification time of the entry.
* @param fileTime the entry modification time.
* @since 1.21
*/
public void setTime(final FileTime fileTime) {
setTime(fileTime.toMillis());
}
/**
*
* {@inheritDoc}
*
* Override to work around bug JDK-8130914
*
* @param time
* The last modification time of the entry in milliseconds
* since the epoch
* @see #getTime()
* @see #getLastModifiedTime()
*/
@Override
public void setTime(final long time) {
if (ZipUtil.isDosTime(time)) {
super.setTime(time);
this.time = time;
lastModifiedDateSet = false;
setExtraTimeFields();
} else {
setLastModifiedTime(FileTime.fromMillis(time));
}
}
/**
* Sets Unix permissions in a way that is understood by Info-Zip's
* unzip command.
* @param mode an {@code int} value
*/
public void setUnixMode(final int mode) {
// CheckStyle:MagicNumberCheck OFF - no point
setExternalAttributes((mode << SHORT_SHIFT)
// MS-DOS read-only attribute
| ((mode & 0200) == 0 ? 1 : 0)
// MS-DOS directory flag
| (isDirectory() ? 0x10 : 0));
// CheckStyle:MagicNumberCheck ON
platform = PLATFORM_UNIX;
}
/**
* Sets the "version made by" field.
* @param versionMadeBy "version made by" field
* @since 1.11
*/
public void setVersionMadeBy(final int versionMadeBy) {
this.versionMadeBy = versionMadeBy;
}
/**
* Sets the "version required to expand" field.
* @param versionRequired "version required to expand" field
* @since 1.11
*/
public void setVersionRequired(final int versionRequired) {
this.versionRequired = versionRequired;
}
private void updateTimeFieldsFromExtraFields() {
// Update times from X5455_ExtendedTimestamp field
updateTimeFromExtendedTimestampField();
// Update times from X000A_NTFS field, overriding X5455_ExtendedTimestamp if both are present
updateTimeFromNtfsField();
}
/**
* Workaround for the fact that, as of Java 17, {@link java.util.zip.ZipEntry} does not properly modify
* the entry's {@code xdostime} field, only setting {@code mtime}. While this is not strictly necessary,
* it's better to maintain the same behavior between this and the NTFS field.
*/
private void updateTimeFromExtendedTimestampField() {
final ZipExtraField extraField = getExtraField(X5455_ExtendedTimestamp.HEADER_ID);
if (extraField instanceof X5455_ExtendedTimestamp) {
final X5455_ExtendedTimestamp extendedTimestamp = (X5455_ExtendedTimestamp) extraField;
if (extendedTimestamp.isBit0_modifyTimePresent()) {
final FileTime modifyTime = extendedTimestamp.getModifyFileTime();
if (modifyTime != null) {
internalSetLastModifiedTime(modifyTime);
}
}
if (extendedTimestamp.isBit1_accessTimePresent()) {
final FileTime accessTime = extendedTimestamp.getAccessFileTime();
if (accessTime != null) {
super.setLastAccessTime(accessTime);
}
}
if (extendedTimestamp.isBit2_createTimePresent()) {
final FileTime creationTime = extendedTimestamp.getCreateFileTime();
if (creationTime != null) {
super.setCreationTime(creationTime);
}
}
}
}
/**
* Workaround for the fact that, as of Java 17, {@link java.util.zip.ZipEntry} parses NTFS
* timestamps with a maximum precision of microseconds, which is lower than the 100ns precision
* provided by this extra field.
*/
private void updateTimeFromNtfsField() {
final ZipExtraField extraField = getExtraField(X000A_NTFS.HEADER_ID);
if (extraField instanceof X000A_NTFS) {
final X000A_NTFS ntfsTimestamp = (X000A_NTFS) extraField;
final FileTime modifyTime = ntfsTimestamp.getModifyFileTime();
if (modifyTime != null) {
internalSetLastModifiedTime(modifyTime);
}
final FileTime accessTime = ntfsTimestamp.getAccessFileTime();
if (accessTime != null) {
super.setLastAccessTime(accessTime);
}
final FileTime creationTime = ntfsTimestamp.getCreateFileTime();
if (creationTime != null) {
super.setCreationTime(creationTime);
}
}
}
}