Package org.apache.commons.compress.archivers.zip

Class ZipArchiveEntry

  • All Implemented Interfaces:
    java.lang.Cloneable, ArchiveEntry, EntryStreamOffsets
    Direct Known Subclasses:
    JarArchiveEntry
    public class ZipArchiveEntry
extends java.util.zip.ZipEntry
implements ArchiveEntry, EntryStreamOffsets
    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.

    • Constructor Detail

      • ZipArchiveEntry

        public ZipArchiveEntry​(java.lang.String name)
        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 "/".

        Parameters:
        name - the name of the entry

      • ZipArchiveEntry

        public ZipArchiveEntry​(java.util.zip.ZipEntry entry)
                throws java.util.zip.ZipException
        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 "/".

        Parameters:
        entry - the entry to get fields from
        Throws:
        java.util.zip.ZipException - on error

      • ZipArchiveEntry

        public ZipArchiveEntry​(ZipArchiveEntry entry)
                throws java.util.zip.ZipException
        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 "/".

        Parameters:
        entry - the entry to get fields from
        Throws:
        java.util.zip.ZipException - on error

      • ZipArchiveEntry

        public ZipArchiveEntry​(java.io.File inputFile,
                       java.lang.String entryName)
        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.

        Parameters:
        inputFile - file to create the entry from
        entryName - name of the entry

      • ZipArchiveEntry

        public ZipArchiveEntry​(java.nio.file.Path inputPath,
                       java.lang.String entryName,
                       java.nio.file.LinkOption... options)
                throws java.io.IOException
        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.

        Parameters:
        inputPath - path to create the entry from.
        entryName - name of the entry.
        options - options indicating how symbolic links are handled.
        Throws:
        java.io.IOException - if an I/O error occurs.
        Since:
        1.21

    • Method Detail

      • setTime

        public void setTime​(java.nio.file.attribute.FileTime fileTime)
        Sets the modification time of the entry.
        Parameters:
        fileTime - the entry modification time.
        Since:
        1.21

      • clone

        public java.lang.Object clone()
        Overwrite clone.
        Overrides:
        clone in class java.util.zip.ZipEntry
        Returns:
        a cloned copy of this ZipArchiveEntry

      • getMethod

        public int getMethod()
        Returns the compression method of this entry, or -1 if the compression method has not been specified.
        Overrides:
        getMethod in class java.util.zip.ZipEntry
        Returns:
        compression method
        Since:
        1.1

      • setMethod

        public void setMethod​(int method)
        Sets the compression method of this entry.
        Overrides:
        setMethod in class java.util.zip.ZipEntry
        Parameters:
        method - compression method
        Since:
        1.1

      • getInternalAttributes

        public int getInternalAttributes()
        Retrieves the internal file attributes.

        Note: ZipArchiveInputStream is unable to fill this field, you must use ZipFile if you want to read entries using this attribute.

        Returns:
        the internal file attributes

      • setInternalAttributes

        public void setInternalAttributes​(int value)
        Sets the internal file attributes.
        Parameters:
        value - an int value

      • getExternalAttributes

        public long getExternalAttributes()
        Retrieves the external file attributes.

        Note: ZipArchiveInputStream is unable to fill this field, you must use ZipFile if you want to read entries using this attribute.

        Returns:
        the external file attributes

      • setExternalAttributes

        public void setExternalAttributes​(long value)
        Sets the external file attributes.
        Parameters:
        value - an long value

      • setUnixMode

        public void setUnixMode​(int mode)
        Sets Unix permissions in a way that is understood by Info-Zip's unzip command.
        Parameters:
        mode - an int value

      • getUnixMode

        public int getUnixMode()
        Unix permission.
        Returns:
        the unix permissions

      • isUnixSymlink

        public boolean isUnixSymlink()
        Returns true if this entry represents a unix symlink, in which case the entry's content contains the target path for the symlink.
        Returns:
        true if the entry represents a unix symlink, false otherwise.
        Since:
        1.5

      • getPlatform

        public int getPlatform()
        Platform specification to put into the "version made by" part of the central file header.
        Returns:
        PLATFORM_FAT unless setUnixMode has been called, in which case PLATFORM_UNIX will be returned.

      • setAlignment

        public void setAlignment​(int alignment)
        Sets alignment for this entry.
        Parameters:
        alignment - requested alignment, 0 for default.
        Since:
        1.14

      • setExtraFields

        public void setExtraFields​(ZipExtraField[] fields)
        Replaces all currently attached extra fields with the new array.
        Parameters:
        fields - an array of extra fields

      • getExtraFields

        public ZipExtraField[] getExtraFields()
        Retrieves all extra fields that have been parsed successfully.

        Note: The set of extra fields may be incomplete when ZipArchiveInputStream has been used as some extra fields use the central directory to store additional information.

        Returns:
        an array of the extra fields

      • getExtraFields

        public ZipExtraField[] getExtraFields​(boolean includeUnparseable)
        Retrieves extra fields.
        Parameters:
        includeUnparseable - whether to also return unparseable extra fields as UnparseableExtraFieldData if such data exists.
        Returns:
        an array of the extra fields
        Since:
        1.1

      • addExtraField

        public void addExtraField​(ZipExtraField ze)
        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.

        Parameters:
        ze - an extra field

      • addAsFirstExtraField

        public void addAsFirstExtraField​(ZipExtraField ze)
        Adds an extra field - replacing an already present extra field of the same type.

        The new extra field will be the first one.

        Parameters:
        ze - an extra field

      • removeExtraField

        public void removeExtraField​(ZipShort type)
        Remove an extra field.
        Parameters:
        type - the type of extra field to remove

      • removeUnparseableExtraFieldData

        public void removeUnparseableExtraFieldData()
        Removes unparseable extra field data.
        Since:
        1.1

      • getExtraField

        public ZipExtraField getExtraField​(ZipShort type)
        Looks up an extra field by its header id.
        Parameters:
        type - the header id
        Returns:
        null if no such field exists.

      • getUnparseableExtraFieldData

        public UnparseableExtraFieldData getUnparseableExtraFieldData()
        Looks up extra field data that couldn't be parsed correctly.
        Returns:
        null if no such field exists.
        Since:
        1.1

      • setExtra

        public void setExtra​(byte[] extra)
              throws java.lang.RuntimeException
        Parses the given bytes as extra field data and consumes any unparseable data as an UnparseableExtraFieldData instance.
        Overrides:
        setExtra in class java.util.zip.ZipEntry
        Parameters:
        extra - an array of bytes to be parsed into extra fields
        Throws:
        java.lang.RuntimeException - if the bytes cannot be parsed
        java.lang.RuntimeException - on error

      • setCentralDirectoryExtra

        public void setCentralDirectoryExtra​(byte[] b)
        Sets the central directory part of extra fields.
        Parameters:
        b - an array of bytes to be parsed into extra fields

      • getLocalFileDataExtra

        public byte[] getLocalFileDataExtra()
        Retrieves the extra data for the local file data.
        Returns:
        the extra data for local file

      • getCentralDirectoryExtra

        public byte[] getCentralDirectoryExtra()
        Retrieves the extra data for the central directory.
        Returns:
        the central directory extra data

      • getName

        public java.lang.String getName()
        Get the name of the entry.

        This method returns the raw name as it is stored inside of the archive.

        Specified by:
        getName in interface ArchiveEntry
        Overrides:
        getName in class java.util.zip.ZipEntry
        Returns:
        the entry name

      • isDirectory

        public boolean isDirectory()
        Is this entry a directory?
        Specified by:
        isDirectory in interface ArchiveEntry
        Overrides:
        isDirectory in class java.util.zip.ZipEntry
        Returns:
        true if the entry is a directory

      • getSize

        public long getSize()
        Gets the uncompressed size of the entry data.

        Note: ZipArchiveInputStream may create entries that return SIZE_UNKNOWN as long as the entry hasn't been read completely.

        Specified by:
        getSize in interface ArchiveEntry
        Overrides:
        getSize in class java.util.zip.ZipEntry
        Returns:
        the entry size

      • setSize

        public void setSize​(long size)
        Sets the uncompressed size of the entry data.
        Overrides:
        setSize in class java.util.zip.ZipEntry
        Parameters:
        size - the uncompressed size in bytes
        Throws:
        java.lang.IllegalArgumentException - if the specified size is less than 0

      • getRawName

        public byte[] getRawName()
        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.

        Returns:
        the raw name bytes
        Since:
        1.2

      • getDataOffset

        public long getDataOffset()
        Description copied from interface: EntryStreamOffsets
        Gets the offset of data stream within the archive file,
        Specified by:
        getDataOffset in interface EntryStreamOffsets
        Returns:
        the offset of entry data stream, OFFSET_UNKNOWN if not known.

      • isStreamContiguous

        public boolean isStreamContiguous()
        Description copied from interface: EntryStreamOffsets
        Indicates whether the stream is contiguous, i.e. not split among several archive parts, interspersed with control blocks, etc.
        Specified by:
        isStreamContiguous in interface EntryStreamOffsets
        Returns:
        true if stream is contiguous, false otherwise.

      • hashCode

        public int hashCode()
        Get the hashCode of the entry. This uses the name as the hashcode.
        Overrides:
        hashCode in class java.util.zip.ZipEntry
        Returns:
        a hashcode.

      • getGeneralPurposeBit

        public GeneralPurposeBit getGeneralPurposeBit()
        The "general purpose bit" field.
        Returns:
        the general purpose bit
        Since:
        1.1

      • setGeneralPurposeBit

        public void setGeneralPurposeBit​(GeneralPurposeBit b)
        The "general purpose bit" field.
        Parameters:
        b - the general purpose bit
        Since:
        1.1

      • getLastModifiedDate

        public java.util.Date getLastModifiedDate()
        Wraps ZipEntry.getTime() with a Date as the entry's last modified date.

        Changes to the implementation of ZipEntry.getTime() leak through and the returned value may depend on your local time zone as well as your version of Java.

        Specified by:
        getLastModifiedDate in interface ArchiveEntry
        Returns:
        the last modified date of this entry.

      • equals

        public boolean equals​(java.lang.Object obj)
        Overrides:
        equals in class java.lang.Object

      • setVersionMadeBy

        public void setVersionMadeBy​(int versionMadeBy)
        Sets the "version made by" field.
        Parameters:
        versionMadeBy - "version made by" field
        Since:
        1.11

      • setVersionRequired

        public void setVersionRequired​(int versionRequired)
        Sets the "version required to expand" field.
        Parameters:
        versionRequired - "version required to expand" field
        Since:
        1.11

      • getVersionRequired

        public int getVersionRequired()
        The "version required to expand" field.
        Returns:
        "version required to expand" field
        Since:
        1.11

      • getVersionMadeBy

        public int getVersionMadeBy()
        The "version made by" field.
        Returns:
        "version made by" field
        Since:
        1.11

      • getRawFlag

        public int getRawFlag()
        The content of the flags field.
        Returns:
        content of the flags field
        Since:
        1.11

      • setRawFlag

        public void setRawFlag​(int rawFlag)
        Sets the content of the flags field.
        Parameters:
        rawFlag - content of the flags field
        Since:
        1.11

      • getNameSource

        public ZipArchiveEntry.NameSource getNameSource()
        The source of the name field value.
        Returns:
        source of the name field value
        Since:
        1.16

      • setNameSource

        public void setNameSource​(ZipArchiveEntry.NameSource nameSource)
        Sets the source of the name field value.
        Parameters:
        nameSource - source of the name field value
        Since:
        1.16

      • getCommentSource

        public ZipArchiveEntry.CommentSource getCommentSource()
        The source of the comment field value.
        Returns:
        source of the comment field value
        Since:
        1.16

      • setCommentSource

        public void setCommentSource​(ZipArchiveEntry.CommentSource commentSource)
        Sets the source of the comment field value.
        Parameters:
        commentSource - source of the comment field value
        Since:
        1.16

      • getDiskNumberStart

        public long getDiskNumberStart()
        The number of the split segment this entry starts at.
        Returns:
        the number of the split segment this entry starts at.
        Since:
        1.20

      • setDiskNumberStart

        public void setDiskNumberStart​(long diskNumberStart)
        The number of the split segment this entry starts at.
        Parameters:
        diskNumberStart - the number of the split segment this entry starts at.
        Since:
        1.20