Zip (Apache Ant API)
Description: declaration: package: org.apache.tools.ant.taskdefs, class: Zip

Package org.apache.tools.ant.taskdefs

# Class Zip

java.lang.Object
org.apache.tools.ant.ProjectComponent
org.apache.tools.ant.Task
org.apache.tools.ant.taskdefs.MatchingTask
org.apache.tools.ant.taskdefs.Zip

All Implemented Interfaces:
  `Cloneable`, `SelectorContainer`

Direct Known Subclasses:
  `Jar`

public class Zip extends MatchingTask
Create a Zip file.

Since:
  Ant 1.1

- ## Nested Class Summary

  Nested Classes
  Modifier and Type
  Class
  Description
  `static class`
  `Zip.ArchiveState`
  Holds the up-to-date status and the out-of-date resources of the original archive.
  `static class`
  `Zip.Duplicate`
  Possible behaviors when a duplicate file is added: "add", "preserve" or "fail"
  `static final class`
  `Zip.UnicodeExtraField`
  Policy for creation of Unicode extra fields: never, always or not-encodeable.
  `static class`
  `Zip.WhenEmpty`
  Possible behaviors when there are no matching files for the task: "fail", "skip", or "create".
  `static final class`
  `Zip.Zip64ModeAttribute`
  The choices for Zip64 extensions.

- ## Field Summary

  Fields
  Modifier and Type
  Field
  Description
  `protected Hashtable<String,String>`
  `addedDirs`
  `protected String`
  `archiveType`
  `protected boolean`
  `doubleFilePass`
  If this flag is true, execute() will run most operations twice, the first time with `skipWriting` set to true and the second time with setting it to false.
  `protected String`
  `duplicate`
  `protected String`
  `emptyBehavior`
  `protected Hashtable<String,String>`
  `entries`
  `protected boolean`
  `skipWriting`
  whether the methods should just perform some sort of dry-run.
  `protected File`
  `zipFile`

  ### Fields inherited from class org.apache.tools.ant.taskdefs.MatchingTask

  `fileset`

  ### Fields inherited from class org.apache.tools.ant.Task

  `target, taskName, taskType, wrapper`

  ### Fields inherited from class org.apache.tools.ant.ProjectComponent

  `description, location, project`

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `Zip()`

- ## Method Summary

  Modifier and Type
  Method
  Description
  `void`
  `add(ResourceCollection a)`
  Add a collection of resources to be archived.
  `void`
  `addFileset(FileSet set)`
  Adds a set of files.
  `protected final void`
  `addParentDirs(File baseDir, String entry, ZipOutputStream zOut, String prefix, int dirMode)`
  Ensure all parent dirs of a given entry have been added.
  `protected final void`
  `addResources(FileSet fileset, Resource[] resources, ZipOutputStream zOut)`
  Add the given resources.
  `protected final void`
  `addResources(ResourceCollection rc, Resource[] resources, ZipOutputStream zOut)`
  Add the given resources.
  `void`
  `addZipfileset(ZipFileSet set)`
  Adds a set of files that can be read from an archive and be given a prefix/fullpath.
  `void`
  `addZipGroupFileset(FileSet set)`
  Adds a group of zip files.
  `protected void`
  `cleanUp()`
  Do any clean up necessary to allow this instance to be used again.
  `protected boolean`
  `createEmptyZip(File zipFile)`
  Create an empty zip file
  `void`
  `execute()`
  validate and build
  `void`
  `executeMain()`
  Build the zip file.
  `protected void`
  `finalizeZipOutputStream(ZipOutputStream zOut)`
  method for subclasses to override
  `String`
  `getComment()`
  Comment of the archive
  `Zip.UnicodeExtraField`
  `getCreateUnicodeExtraFields()`
  Whether Unicode extra fields will be created.
  `protected final ZipExtraField[]`
  `getCurrentExtraFields()`
  Provides the extra fields for the zip entry currently being added to the archive - if any.
  `File`
  `getDestFile()`
  The file to create.
  `String`
  `getEncoding()`
  Encoding to use for filenames.
  `boolean`
  `getFallBackToUTF8()`
  Whether to fall back to UTF-8 if a name cannot be encoded using the specified encoding.
  `int`
  `getLevel()`
  Get the compression level.
  `String`
  `getModificationtime()`
  The file modification time previously provided to `setModificationtime(String)` or `null` if unset.
  `protected Zip.ArchiveState`
  `getNonFileSetResourcesToAdd(ResourceCollection[] rcs, File zipFile, boolean needsUpdate)`
  Collect the resources that are newer than the corresponding entries (or missing) in the original archive.
  `boolean`
  `getPreserve0Permissions()`
  Assume 0 Unix mode is intentional.
  `protected Zip.ArchiveState`
  `getResourcesToAdd(FileSet[] filesets, File zipFile, boolean needsUpdate)`
  Collect the resources that are newer than the corresponding entries (or missing) in the original archive.
  `protected Zip.ArchiveState`
  `getResourcesToAdd(ResourceCollection[] rcs, File zipFile, boolean needsUpdate)`
  Collect the resources that are newer than the corresponding entries (or missing) in the original archive.
  `boolean`
  `getUseLanguageEnodingFlag()`
  Whether the language encoding flag will be used.
  `Zip.Zip64ModeAttribute`
  `getZip64Mode()`
  Whether Zip64 extensions will be used.
  `protected Resource[][]`
  `grabNonFileSetResources(ResourceCollection[] rcs)`
  Fetch all included and not excluded resources from the collections.
  `protected Resource[][]`
  `grabResources(FileSet[] filesets)`
  Fetch all included and not excluded resources from the sets.
  `protected boolean`
  `hasUpdatedFile()`
  Get the value of the updatedFile attribute.
  `protected void`
  `initZipOutputStream(ZipOutputStream zOut)`
  method for subclasses to override
  `protected final boolean`
  `isAddingNewFiles()`
  Indicates if the task is adding new files into the archive as opposed to copying back unchanged files from the backup copy
  `boolean`
  `isCompress()`
  Whether we want to compress the files or only store them;
  `protected static final boolean`
  `isEmpty(Resource[][] r)`
  Check is the resource arrays are empty.
  `protected final boolean`
  `isFirstPass()`
  Whether this is the first time the archive building methods are invoked.
  `boolean`
  `isInUpdateMode()`
  Are we updating an existing archive?
  `protected void`
  `logWhenWriting(String msg, int level)`
  Logs a message at the given output level, but only if this is the pass that will actually create the archive.
  `void`
  `reset()`
  Makes this instance reset all attributes to their default values and forget all children.
  `protected Resource[]`
  `selectDirectoryResources(Resource[] orig)`
  Drops all non-directory resources from the given array.
  `protected Resource[]`
  `selectFileResources(Resource[] orig)`
  Drops all non-file resources from the given array.
  `protected Resource[]`
  `selectResources(Resource[] orig, ResourceSelector selector)`
  Drops all resources from the given array that are not selected
  `void`
  `setBasedir(File baseDir)`
  Directory from which to archive files; optional.
  `void`
  `setComment(String comment)`
  Comment to use for archive.
  `void`
  `setCompress(boolean c)`
  Whether we want to compress the files or only store them; optional, default=true;
  `void`
  `setCreateUnicodeExtraFields(Zip.UnicodeExtraField b)`
  Whether Unicode extra fields will be created.
  `protected final void`
  `setCurrentExtraFields(ZipExtraField[] extra)`
  Sets the extra fields for the zip entry currently being added to the archive - if any.
  `void`
  `setDestFile(File destFile)`
  The file to create; required.
  `void`
  `setDuplicate(Zip.Duplicate df)`
  Sets behavior for when a duplicate file is about to be added - one of `add`, `preserve` or `fail`.
  `void`
  `setEncoding(String encoding)`
  Encoding to use for filenames, defaults to the platform's default encoding.
  `void`
  `setFallBackToUTF8(boolean b)`
  Whether to fall back to UTF-8 if a name cannot be encoded using the specified encoding.
  `void`
  `setFile(File file)`
  Deprecated.
  since 1.5.x.
  `void`
  `setFilesonly(boolean f)`
  If true, emulate Sun's jar utility by not adding parent directories; optional, defaults to false.
  `void`
  `setKeepCompression(boolean keep)`
  Whether the original compression of entries coming from a ZIP archive should be kept (for example when updating an archive).
  `void`
  `setLevel(int level)`
  Set the compression level to use.
  `void`
  `setModificationtime(String time)`
  Set all stored file modification times to `time`.
  `void`
  `setPreserve0Permissions(boolean b)`
  Assume 0 Unix mode is intentional.
  `void`
  `setRoundUp(boolean r)`
  Whether the file modification times will be rounded up to the next even number of seconds.
  `void`
  `setUpdate(boolean c)`
  If true, updates an existing file, otherwise overwrite any existing one; optional defaults to false.
  `void`
  `setUseLanguageEncodingFlag(boolean b)`
  Whether to set the language encoding flag.
  `void`
  `setWhenempty(Zip.WhenEmpty we)`
  Sets behavior of the task when no files match.
  `void`
  `setZip64Mode(Zip.Zip64ModeAttribute b)`
  Whether Zip64 extensions should be used.
  `void`
  `setZipfile(File zipFile)`
  Deprecated.
  since 1.5.x.
  `protected void`
  `zipDir(File dir, ZipOutputStream zOut, String vPath, int mode)`
  Add a directory to the zip stream.
  `protected void`
  `zipDir(File dir, ZipOutputStream zOut, String vPath, int mode, ZipExtraField[] extra)`
  Add a directory to the zip stream.
  `protected void`
  `zipDir(Resource dir, ZipOutputStream zOut, String vPath, int mode, ZipExtraField[] extra)`
  Add a directory to the zip stream.
  `protected void`
  `zipFile(File file, ZipOutputStream zOut, String vPath, int mode)`
  Method that gets called when adding from `java.io.File` instances.
  `protected void`
  `zipFile(InputStream in, ZipOutputStream zOut, String vPath, long lastModified, File fromArchive, int mode)`
  Adds a new entry to the archive, takes care of duplicates as well.
  `protected final void`
  `zipFile(InputStream in, ZipOutputStream zOut, String vPath, long lastModified, File fromArchive, int mode, ZipExtraField[] extra)`
  Adds a new entry to the archive, takes care of duplicates as well.

  ### Methods inherited from class org.apache.tools.ant.taskdefs.MatchingTask

  `add, addAnd, addContains, addContainsRegexp, addCustom, addDate, addDepend, addDepth, addDifferent, addFilename, addMajority, addModified, addNone, addNot, addOr, addPresent, addSelector, addSize, addType, appendSelector, createExclude, createExcludesFile, createInclude, createIncludesFile, createPatternSet, getDirectoryScanner, getImplicitFileSet, getSelectors, hasSelectors, selectorCount, selectorElements, setCaseSensitive, setDefaultexcludes, setExcludes, setExcludesfile, setFollowSymlinks, setIncludes, setIncludesfile, setProject, XsetIgnore, XsetItems`

  ### Methods inherited from class org.apache.tools.ant.Task

  `bindToOwner, getOwningTarget, getRuntimeConfigurableWrapper, getTaskName, getTaskType, getWrapper, handleErrorFlush, handleErrorOutput, handleFlush, handleInput, handleOutput, init, isInvalid, log, log, log, log, maybeConfigure, perform, reconfigure, setOwningTarget, setRuntimeConfigurableWrapper, setTaskName, setTaskType`

  ### Methods inherited from class org.apache.tools.ant.ProjectComponent

  `clone, getDescription, getLocation, getProject, setDescription, setLocation`

  ### Methods inherited from class java.lang.Object

  `equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- ## Field Details

  - ### zipFile

    protected File zipFile

  - ### entries

    protected Hashtable<String,String> entries

  - ### duplicate

    protected String duplicate

  - ### archiveType

    protected String archiveType

  - ### emptyBehavior

    protected String emptyBehavior

  - ### addedDirs

    protected Hashtable<String,String> addedDirs

  - ### doubleFilePass

    protected boolean doubleFilePass
    If this flag is true, execute() will run most operations twice, the first time with `skipWriting` set to true and the second time with setting it to false.

    The only situation in Ant's current code base where this is ever going to be true is if the jar task has been configured with a filesetmanifest other than "skip".

  - ### skipWriting

    protected boolean skipWriting
    whether the methods should just perform some sort of dry-run.

    Will only ever be true in the first pass if the task performs two passes because `doubleFilePass` is true.

- ## Constructor Details

  - ### Zip

    public Zip()

- ## Method Details

  - ### isFirstPass

    protected final boolean isFirstPass()
    Whether this is the first time the archive building methods are invoked.
    Returns:
      true if either `doubleFilePass` is false or `skipWriting` is true.
    Since:
      Ant 1.8.0

  - ### setZipfile

    @Deprecated public void setZipfile(File zipFile)
    Deprecated.
    since 1.5.x. Use setDestFile(File) instead.
    This is the name/location of where to create the .zip file.
    Parameters:
      `zipFile` - the path of the zipFile

  - ### setFile

    @Deprecated public void setFile(File file)
    Deprecated.
    since 1.5.x. Use setDestFile(File) instead.
    This is the name/location of where to create the file.
    Parameters:
      `file` - the path of the zipFile
    Since:
      Ant 1.5

  - ### setDestFile

    public void setDestFile(File destFile)
    The file to create; required.
    Parameters:
      `destFile` - The new destination File
    Since:
      Ant 1.5

  - ### getDestFile

    public File getDestFile()
    The file to create.
    Returns:
      the destination file
    Since:
      Ant 1.5.2

  - ### setBasedir

    public void setBasedir(File baseDir)
    Directory from which to archive files; optional.
    Parameters:
      `baseDir` - the base directory

  - ### setCompress

    public void setCompress(boolean c)
    Whether we want to compress the files or only store them; optional, default=true;
    Parameters:
      `c` - if true, compress the files

  - ### isCompress

    public boolean isCompress()
    Whether we want to compress the files or only store them;
    Returns:
      true if the files are to be compressed
    Since:
      Ant 1.5.2

  - ### setFilesonly

    public void setFilesonly(boolean f)
    If true, emulate Sun's jar utility by not adding parent directories; optional, defaults to false.
    Parameters:
      `f` - if true, emulate sun's jar by not adding parent directories

  - ### setUpdate

    public void setUpdate(boolean c)
    If true, updates an existing file, otherwise overwrite any existing one; optional defaults to false.
    Parameters:
      `c` - if true, updates an existing zip file

  - ### isInUpdateMode

    public boolean isInUpdateMode()
    Are we updating an existing archive?
    Returns:
      true if updating an existing archive

  - ### addFileset

    public void addFileset(FileSet set)
    Adds a set of files.
    Parameters:
      `set` - the fileset to add

  - ### addZipfileset

    public void addZipfileset(ZipFileSet set)
    Adds a set of files that can be read from an archive and be given a prefix/fullpath.
    Parameters:
      `set` - the zipfileset to add

  - ### add

    public void add(ResourceCollection a)
    Add a collection of resources to be archived.
    Parameters:
      `a` - the resources to archive
    Since:
      Ant 1.7

  - ### addZipGroupFileset

    public void addZipGroupFileset(FileSet set)
    Adds a group of zip files.
    Parameters:
      `set` - the group (a fileset) to add

  - ### setDuplicate

    public void setDuplicate(Zip.Duplicate df)
    Sets behavior for when a duplicate file is about to be added - one of `add`, `preserve` or `fail`. Possible values are: `add` (keep both of the files); `preserve` (keep the first version of the file found); `fail` halt a problem Default for zip tasks is `add`
    Parameters:
      `df` - a `Duplicate` enumerated value

  - ### setWhenempty

    public void setWhenempty(Zip.WhenEmpty we)
    Sets behavior of the task when no files match. Possible values are: `fail` (throw an exception and halt the build); `skip` (do not create any archive, but issue a warning); `create` (make an archive with no entries). Default for zip tasks is `skip`; for jar tasks, `create`.
    Parameters:
      `we` - a `WhenEmpty` enumerated value

  - ### setEncoding

    public void setEncoding(String encoding)
    Encoding to use for filenames, defaults to the platform's default encoding.

    For a list of possible values see https://docs.oracle.com/javase/8/docs/technotes/guides/intl/encoding.doc.html.

    Parameters:
      `encoding` - the encoding name

  - ### getEncoding

    public String getEncoding()
    Encoding to use for filenames.
    Returns:
      the name of the encoding to use
    Since:
      Ant 1.5.2

  - ### setKeepCompression

    public void setKeepCompression(boolean keep)
    Whether the original compression of entries coming from a ZIP archive should be kept (for example when updating an archive). Default is false.
    Parameters:
      `keep` - if true, keep the original compression
    Since:
      Ant 1.6

  - ### setComment

    public void setComment(String comment)
    Comment to use for archive.
    Parameters:
      `comment` - The content of the comment.
    Since:
      Ant 1.6.3

  - ### getComment

    public String getComment()
    Comment of the archive
    Returns:
      Comment of the archive.
    Since:
      Ant 1.6.3

  - ### setLevel

    public void setLevel(int level)
    Set the compression level to use. Default is ZipOutputStream.DEFAULT_COMPRESSION.
    Parameters:
      `level` - compression level.
    Since:
      Ant 1.7

  - ### getLevel

    public int getLevel()
    Get the compression level.
    Returns:
      compression level.
    Since:
      Ant 1.7

  - ### setRoundUp

    public void setRoundUp(boolean r)
    Whether the file modification times will be rounded up to the next even number of seconds.

    Zip archives store file modification times with a granularity of two seconds, so the times will either be rounded up or down. If you round down, the archive will always seem out-of-date when you rerun the task, so the default is to round up. Rounding up may lead to a different type of problems like JSPs inside a web archive that seem to be slightly more recent than precompiled pages, rendering precompilation useless.

    Parameters:
      `r` - a `boolean` value
    Since:
      Ant 1.6.2

  - ### setPreserve0Permissions

    public void setPreserve0Permissions(boolean b)
    Assume 0 Unix mode is intentional.
    Parameters:
      `b` - boolean
    Since:
      Ant 1.8.0

  - ### getPreserve0Permissions

    public boolean getPreserve0Permissions()
    Assume 0 Unix mode is intentional.
    Returns:
      boolean
    Since:
      Ant 1.8.0

  - ### setUseLanguageEncodingFlag

    public void setUseLanguageEncodingFlag(boolean b)
    Whether to set the language encoding flag.
    Parameters:
      `b` - boolean
    Since:
      Ant 1.8.0

  - ### getUseLanguageEnodingFlag

    public boolean getUseLanguageEnodingFlag()
    Whether the language encoding flag will be used.
    Returns:
      boolean
    Since:
      Ant 1.8.0

  - ### setCreateUnicodeExtraFields

    public void setCreateUnicodeExtraFields(Zip.UnicodeExtraField b)
    Whether Unicode extra fields will be created.
    Parameters:
      `b` - boolean
    Since:
      Ant 1.8.0

  - ### getCreateUnicodeExtraFields

    public Zip.UnicodeExtraField getCreateUnicodeExtraFields()
    Whether Unicode extra fields will be created.
    Returns:
      boolean
    Since:
      Ant 1.8.0

  - ### setFallBackToUTF8

    public void setFallBackToUTF8(boolean b)
    Whether to fall back to UTF-8 if a name cannot be encoded using the specified encoding.

    Defaults to false.

    Parameters:
      `b` - boolean
    Since:
      Ant 1.8.0

  - ### getFallBackToUTF8

    public boolean getFallBackToUTF8()
    Whether to fall back to UTF-8 if a name cannot be encoded using the specified encoding.
    Returns:
      boolean
    Since:
      Ant 1.8.0

  - ### setZip64Mode

    public void setZip64Mode(Zip.Zip64ModeAttribute b)
    Whether Zip64 extensions should be used.
    Parameters:
      `b` - boolean
    Since:
      Ant 1.9.1

  - ### getZip64Mode

    public Zip.Zip64ModeAttribute getZip64Mode()
    Whether Zip64 extensions will be used.
    Returns:
      boolean
    Since:
      Ant 1.9.1

  - ### setModificationtime

    public void setModificationtime(String time)
    Set all stored file modification times to `time`.
    Parameters:
      `time` - Milliseconds since 1970-01-01 00:00, or `YYYY-MM-DD{T/ }HH:MM[:SS[.SSS]][ ][±ZZ[[:]ZZ]]`, or `MM/DD/YYYY HH:MM[:SS] {AM/PM}`, where {a/b} indicates that you must choose one of a or b, and [c] indicates that you may use or omit c. ±ZZZZ is the timezone offset, and may be literally "Z" to mean GMT.
    Since:
      Ant 1.10.2

  - ### getModificationtime

    public String getModificationtime()
    The file modification time previously provided to `setModificationtime(String)` or `null` if unset.
    Returns:
      String
    Since:
      Ant 1.10.2

  - ### execute

    public void execute() throws BuildException
    validate and build
    Overrides:
      `execute` in class `Task`
    Throws:
      `BuildException` - on error

  - ### hasUpdatedFile

    protected boolean hasUpdatedFile()
    Get the value of the updatedFile attribute. This should only be called after executeMain has been called.
    Returns:
      true if executeMain has written to the zip file.

  - ### executeMain

    public void executeMain() throws BuildException
    Build the zip file. This is called twice if doubleFilePass is true.
    Throws:
      `BuildException` - on error

  - ### isAddingNewFiles

    protected final boolean isAddingNewFiles()
    Indicates if the task is adding new files into the archive as opposed to copying back unchanged files from the backup copy
    Returns:
      true if adding new files

  - ### addResources

    protected final void addResources(FileSet fileset, Resource[] resources, ZipOutputStream zOut) throws IOException
    Add the given resources.
    Parameters:
      `fileset` - may give additional information like fullpath or permissions.
      `resources` - the resources to add
      `zOut` - the stream to write to
    Throws:
      `IOException` - on error
    Since:
      Ant 1.5.2

  - ### addResources

    protected final void addResources(ResourceCollection rc, Resource[] resources, ZipOutputStream zOut) throws IOException
    Add the given resources.
    Parameters:
      `rc` - may give additional information like fullpath or permissions.
      `resources` - the resources to add
      `zOut` - the stream to write to
    Throws:
      `IOException` - on error
    Since:
      Ant 1.7

  - ### initZipOutputStream

    protected void initZipOutputStream(ZipOutputStream zOut) throws IOException, BuildException
    method for subclasses to override
    Parameters:
      `zOut` - the zip output stream
    Throws:
      `IOException` - on output error
      `BuildException` - on other errors

  - ### finalizeZipOutputStream

    protected void finalizeZipOutputStream(ZipOutputStream zOut) throws IOException, BuildException
    method for subclasses to override
    Parameters:
      `zOut` - the zip output stream
    Throws:
      `IOException` - on output error
      `BuildException` - on other errors

  - ### createEmptyZip

    protected boolean createEmptyZip(File zipFile) throws BuildException
    Create an empty zip file
    Parameters:
      `zipFile` - the zip file
    Returns:
      true for historic reasons
    Throws:
      `BuildException` - on error

  - ### getResourcesToAdd

    protected Zip.ArchiveState getResourcesToAdd(ResourceCollection[] rcs, File zipFile, boolean needsUpdate) throws BuildException
    Collect the resources that are newer than the corresponding entries (or missing) in the original archive.

    If we are going to recreate the archive instead of updating it, all resources should be considered as new, if a single one is. Because of this, subclasses overriding this method must call `super.getResourcesToAdd` and indicate with the third arg if they already know that the archive is out-of-date.

    This method first delegates to getNonFileSetResourcesToAdd and then invokes the FileSet-arg version. All this to keep backwards compatibility for subclasses that don't know how to deal with non-FileSet ResourceCollections.

    Parameters:
      `rcs` - The resource collections to grab resources from
      `zipFile` - intended archive file (may or may not exist)
      `needsUpdate` - whether we already know that the archive is out-of-date. Subclasses overriding this method are supposed to set this value correctly in their call to `super.getResourcesToAdd`.
    Returns:
      an array of resources to add for each fileset passed in as well as a flag that indicates whether the archive is uptodate.
    Throws:
      `BuildException` - if it likes
    Since:
      Ant 1.7

  - ### getResourcesToAdd

    protected Zip.ArchiveState getResourcesToAdd(FileSet[] filesets, File zipFile, boolean needsUpdate) throws BuildException
    Collect the resources that are newer than the corresponding entries (or missing) in the original archive.

    If we are going to recreate the archive instead of updating it, all resources should be considered as new, if a single one is. Because of this, subclasses overriding this method must call `super.getResourcesToAdd` and indicate with the third arg if they already know that the archive is out-of-date.

    Parameters:
      `filesets` - The filesets to grab resources from
      `zipFile` - intended archive file (may or may not exist)
      `needsUpdate` - whether we already know that the archive is out-of-date. Subclasses overriding this method are supposed to set this value correctly in their call to `super.getResourcesToAdd`.
    Returns:
      an array of resources to add for each fileset passed in as well as a flag that indicates whether the archive is uptodate.
    Throws:
      `BuildException` - if it likes

  - ### getNonFileSetResourcesToAdd

    protected Zip.ArchiveState getNonFileSetResourcesToAdd(ResourceCollection[] rcs, File zipFile, boolean needsUpdate) throws BuildException
    Collect the resources that are newer than the corresponding entries (or missing) in the original archive.

    If we are going to recreate the archive instead of updating it, all resources should be considered as new, if a single one is. Because of this, subclasses overriding this method must call `super.getResourcesToAdd` and indicate with the third arg if they already know that the archive is out-of-date.

    Parameters:
      `rcs` - The filesets to grab resources from
      `zipFile` - intended archive file (may or may not exist)
      `needsUpdate` - whether we already know that the archive is out-of-date. Subclasses overriding this method are supposed to set this value correctly in their call to `super.getResourcesToAdd`.
    Returns:
      an array of resources to add for each fileset passed in as well as a flag that indicates whether the archive is uptodate.
    Throws:
      `BuildException` - if it likes

  - ### grabResources

    protected Resource[][] grabResources(FileSet[] filesets)
    Fetch all included and not excluded resources from the sets.

    Included directories will precede included files.

    Parameters:
      `filesets` - an array of filesets
    Returns:
      the resources included
    Since:
      Ant 1.5.2

  - ### grabNonFileSetResources

    protected Resource[][] grabNonFileSetResources(ResourceCollection[] rcs)
    Fetch all included and not excluded resources from the collections.

    Included directories will precede included files.

    Parameters:
      `rcs` - an array of resource collections
    Returns:
      the resources included
    Since:
      Ant 1.7

  - ### zipDir

    protected void zipDir(File dir, ZipOutputStream zOut, String vPath, int mode) throws IOException
    Add a directory to the zip stream.
    Parameters:
      `dir` - the directory to add to the archive
      `zOut` - the stream to write to
      `vPath` - the name this entry shall have in the archive
      `mode` - the Unix permissions to set.
    Throws:
      `IOException` - on error
    Since:
      Ant 1.5.2

  - ### zipDir

    protected void zipDir(File dir, ZipOutputStream zOut, String vPath, int mode, ZipExtraField[] extra) throws IOException
    Add a directory to the zip stream.
    Parameters:
      `dir` - the directory to add to the archive
      `zOut` - the stream to write to
      `vPath` - the name this entry shall have in the archive
      `mode` - the Unix permissions to set.
      `extra` - ZipExtraFields to add
    Throws:
      `IOException` - on error
    Since:
      Ant 1.6.3

  - ### zipDir

    protected void zipDir(Resource dir, ZipOutputStream zOut, String vPath, int mode, ZipExtraField[] extra) throws IOException
    Add a directory to the zip stream.
    Parameters:
      `dir` - the directory to add to the archive
      `zOut` - the stream to write to
      `vPath` - the name this entry shall have in the archive
      `mode` - the Unix permissions to set.
      `extra` - ZipExtraFields to add
    Throws:
      `IOException` - on error
    Since:
      Ant 1.8.0

  - ### getCurrentExtraFields

    protected final ZipExtraField[] getCurrentExtraFields()
    Provides the extra fields for the zip entry currently being added to the archive - if any.
    Returns:
      ZipExtraField[]
    Since:
      Ant 1.8.0

  - ### setCurrentExtraFields

    protected final void setCurrentExtraFields(ZipExtraField[] extra)
    Sets the extra fields for the zip entry currently being added to the archive - if any.
    Parameters:
      `extra` - ZipExtraField[]
    Since:
      Ant 1.8.0

  - ### zipFile

    protected void zipFile(InputStream in, ZipOutputStream zOut, String vPath, long lastModified, File fromArchive, int mode) throws IOException
    Adds a new entry to the archive, takes care of duplicates as well.
    Parameters:
      `in` - the stream to read data for the entry from. The caller of the method is responsible for closing the stream.
      `zOut` - the stream to write to.
      `vPath` - the name this entry shall have in the archive.
      `lastModified` - last modification time for the entry.
      `fromArchive` - the original archive we are copying this entry from, will be null if we are not copying from an archive.
      `mode` - the Unix permissions to set.
    Throws:
      `IOException` - on error
    Since:
      Ant 1.5.2

  - ### zipFile

    protected final void zipFile(InputStream in, ZipOutputStream zOut, String vPath, long lastModified, File fromArchive, int mode, ZipExtraField[] extra) throws IOException
    Adds a new entry to the archive, takes care of duplicates as well.
    Parameters:
      `in` - the stream to read data for the entry from. The caller of the method is responsible for closing the stream.
      `zOut` - the stream to write to.
      `vPath` - the name this entry shall have in the archive.
      `lastModified` - last modification time for the entry.
      `fromArchive` - the original archive we are copying this entry from, will be null if we are not copying from an archive.
      `mode` - the Unix permissions to set.
      `extra` - ZipExtraFields to add
    Throws:
      `IOException` - on error
    Since:
      Ant 1.8.0

  - ### zipFile

    protected void zipFile(File file, ZipOutputStream zOut, String vPath, int mode) throws IOException
    Method that gets called when adding from `java.io.File` instances.

    This implementation delegates to the six-arg version.

    Parameters:
      `file` - the file to add to the archive
      `zOut` - the stream to write to
      `vPath` - the name this entry shall have in the archive
      `mode` - the Unix permissions to set.
    Throws:
      `IOException` - on error
    Since:
      Ant 1.5.2

  - ### addParentDirs

    protected final void addParentDirs(File baseDir, String entry, ZipOutputStream zOut, String prefix, int dirMode) throws IOException
    Ensure all parent dirs of a given entry have been added.
    Parameters:
      `baseDir` - the base directory to use (may be null)
      `entry` - the entry name to create directories from
      `zOut` - the stream to write to
      `prefix` - a prefix to place on the created entries
      `dirMode` - the directory mode
    Throws:
      `IOException` - on error
    Since:
      Ant 1.5.2

  - ### cleanUp

    protected void cleanUp()
    Do any clean up necessary to allow this instance to be used again.

    When we get here, the Zip file has been closed and all we need to do is to reset some globals.

    This method will only reset globals that have been changed during execute(), it will not alter the attributes or nested child elements. If you want to reset the instance so that you can later zip a completely different set of files, you must use the reset method.

    See Also:
      - `reset()`

  - ### reset

    public void reset()
    Makes this instance reset all attributes to their default values and forget all children.
    Since:
      Ant 1.5
    See Also:
      - `cleanUp()`

  - ### isEmpty

    protected static final boolean isEmpty(Resource[][] r)
    Check is the resource arrays are empty.
    Parameters:
      `r` - the arrays to check
    Returns:
      true if all individual arrays are empty
    Since:
      Ant 1.5.2

  - ### selectFileResources

    protected Resource[] selectFileResources(Resource[] orig)
    Drops all non-file resources from the given array.
    Parameters:
      `orig` - the resources to filter
    Returns:
      the filters resources
    Since:
      Ant 1.6

  - ### selectDirectoryResources

    protected Resource[] selectDirectoryResources(Resource[] orig)
    Drops all non-directory resources from the given array.
    Parameters:
      `orig` - the resources to filter
    Returns:
      the filters resources
    Since:
      Ant 1.8.0

  - ### selectResources

    protected Resource[] selectResources(Resource[] orig, ResourceSelector selector)
    Drops all resources from the given array that are not selected
    Parameters:
      `orig` - the resources to filter
      `selector` - ResourceSelector
    Returns:
      the filters resources
    Since:
      Ant 1.8.0

  - ### logWhenWriting

    protected void logWhenWriting(String msg, int level)
    Logs a message at the given output level, but only if this is the pass that will actually create the archive.
    Parameters:
      `msg` - String
      `level` - int
    Since:
      Ant 1.8.0