de.schlichtherle.io.archive.zip
Class ZipOutputArchive

java.lang.Object
  java.io.OutputStream
      java.io.FilterOutputStream
          de.schlichtherle.util.zip.BasicZipOutputStream
              de.schlichtherle.io.archive.zip.ZipOutputArchive

All Implemented Interfaces:

OutputArchive, Closeable, Flushable

Direct Known Subclasses:

CheckedZip32OutputArchive, Zip32OutputArchive

public class ZipOutputArchive
extends BasicZipOutputStream
implements OutputArchive

An implementation of OutputArchive to write ZIP archives.

This output archive can only write one entry at a time. Archive drivers may wrap this class in a MultiplexedOutputArchive to overcome this limitation.

Since:

TrueZIP 6.7

Author:

Christian Schlichtherle

See Also:

ZipDriver

TEMP_FILE_PREFIX

private static final String TEMP_FILE_PREFIX

Prefix for temporary files created by the multiplexer.

See Also:

Constant Field Values

source

private final ZipInputArchive source

metaData

private OutputArchiveMetaData metaData

tempEntry

private ZipEntry tempEntry

ZipOutputArchive

public ZipOutputArchive(OutputStream out,
                        String charset,
                        ZipInputArchive source)
                 throws NullPointerException,
                        UnsupportedEncodingException,
                        IOException

Deprecated. 

Throws:

NullPointerException

UnsupportedEncodingException

IOException

ZipOutputArchive

public ZipOutputArchive(OutputStream out,
                        String charset,
                        int level,
                        ZipInputArchive source)
                 throws NullPointerException,
                        UnsupportedEncodingException,
                        IOException

Creates a new instance which uses the output stream, character set and compression level.

Parameters:

level - The compression level to use.

Throws:

IllegalArgumentException - If level is not in the range [1..9] and is not -1.

NullPointerException

UnsupportedEncodingException

IOException

getNumArchiveEntries

public int getNumArchiveEntries()

Description copied from interface: OutputArchive

Returns the number of ArchiveEntry instances in this archive.

This method may be called before the archive is closed and must also reflect entries which have not yet been closed.

Specified by:

getNumArchiveEntries in interface OutputArchive

getArchiveEntries

public Enumeration getArchiveEntries()

Description copied from interface: OutputArchive

Returns an enumeration of the ArchiveEntry instances in this archive (i.e. written so far).

This method may be called before the archive is closed and must also reflect entries which have not yet been closed.

Specified by:

getArchiveEntries in interface OutputArchive

getArchiveEntry

public ArchiveEntry getArchiveEntry(String entryName)

Description copied from interface: OutputArchive

Returns the ArchiveEntry for the given entry name or null if no entry with this name has been written or started to be written.

This method may be called before the archive is closed and must also reflect entries which have not yet been closed.

Specified by:

getArchiveEntry in interface OutputArchive

Parameters:

entryName - A valid archive entry name - never null.

See Also:

Requirements for Archive Entry Names

getOutputStream

public OutputStream getOutputStream(ArchiveEntry dstEntry,
                                    ArchiveEntry srcEntry)
                             throws IOException

Description copied from interface: OutputArchive

Returns a new OutputStream for writing the contents of the given archive entry.

The returned stream should preferrably be unbuffered, as buffering is usually done in higher layers (all copy routines in TrueZIP do this and most client applications do it, too). Buffering twice does not increase, but decrease performance.

Note that the stream is guaranteed to be closed before the OutputArchive.close() method of this archive is called!

Specified by:

getOutputStream in interface OutputArchive

Parameters:

dstEntry - A valid reference to an archive entry. The runtime class of this entry is the same as the runtime class of the entries returned by ArchiveDriver.createArchiveEntry(de.schlichtherle.io.archive.Archive, java.lang.String, de.schlichtherle.io.archive.spi.ArchiveEntry).

srcEntry - If not null, this identifies the entry from which TrueZIP is actually copying data from and should be used to implement the Direct Data Copying (DDC) feature. Note that there is no guarantee on the runtime type of this object; it may have been created by other drivers. Furthermore, this not exclusively used for archive copies, so you should not simply copy all properties of the source entry to the entry (see ArchiveDriver.createArchiveEntry(Archive, String, ArchiveEntry) for comparison).

For example, the ZIP driver family uses this to copy the already deflated data if the source entry is another ZIP file entry. As another example, the TarDriver uses this to determine the size of the input file, thereby removing the need to create (yet another) temporary file.

Returns:

A (preferrably unbuffered) OutputStream to write the archive entry data to. null is not allowed!

Throws:

OutputArchiveBusyException - If the archive is currently busy on output for another entry. This exception is guaranteed to be recoverable, meaning it should be possible to write the same entry again as soon as the archive is not busy on output anymore.

FileNotFoundException - If the archive entry is not accessible for some reason.

IOException - On any other exceptional condition.

isBusy

public final boolean isBusy()

Returns whether this output archive is busy writing an archive entry or not.

Overrides:

isBusy in class BasicZipOutputStream

storeTempEntry

private void storeTempEntry(ZipEntry entry,
                            File temp)
                     throws IOException

Throws:

IOException

storeDirectory

public final void storeDirectory(ArchiveEntry entry)
                          throws IOException

Deprecated. This method will be removed in the next major version number release and should be implemented as getOutputStream(entry, null).close().

Description copied from interface: OutputArchive

Writes the given entry as a directory enry.

Specified by:

storeDirectory in interface OutputArchive

Parameters:

entry - The archive entry to write. This is never null and safe to be casted to the archive entry type actually created by the ArchiveDriver.createArchiveEntry(de.schlichtherle.io.archive.Archive, java.lang.String, de.schlichtherle.io.archive.spi.ArchiveEntry) method.

Throws:

IOException - On any exceptional condition.

finish

public void finish()
            throws IOException

Retain the postamble of the source ZIP archive, if any.

Overrides:

finish in class BasicZipOutputStream

Throws:

ZipException - If and only if writing the entry is impossible because the resulting file would not comply to the ZIP file format specification.

IOException - On any I/O related issue.

getMetaData

public OutputArchiveMetaData getMetaData()

Description copied from interface: OutputArchive

Returns the meta data for this input archive. The default value is null.

Specified by:

getMetaData in interface OutputArchive

setMetaData

public void setMetaData(OutputArchiveMetaData metaData)

Description copied from interface: OutputArchive

Sets the meta data for this input archive.

Specified by:

setMetaData in interface OutputArchive

Parameters:

metaData - The meta data - may not be null.