Zip (Apache Ant API)

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:
    java.lang.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 and 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    `static class` | `Zip.ArchiveState` Holds the up-to-date status and the out-of-date resources of the original archive.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 class` | `Zip.UnicodeExtraField` Policiy 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 class` | `Zip.Zip64ModeAttribute` The choices for Zip64 extensions.

  - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `protected java.util.Hashtable<java.lang.String,java.lang.String>` | `addedDirs`
    `protected java.lang.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 java.lang.String` | `duplicate`
    `protected java.lang.String` | `emptyBehavior`
    `protected java.util.Hashtable<java.lang.String,java.lang.String>` | `entries`
    `protected boolean` | `skipWriting` whether the methods should just perform some sort of dry-run.
    `protected java.io.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 and Description
    `Zip()`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `add(ResourceCollection a)` Add a collection of resources to be archived.
    `void` | `addFileset(FileSet set)` Adds a set of files.
    `protected void` | `addParentDirs(java.io.File baseDir, java.lang.String entry, ZipOutputStream zOut, java.lang.String prefix, int dirMode)` Ensure all parent dirs of a given entry have been added.
    `protected void` | `addResources(FileSet fileset, Resource[] resources, ZipOutputStream zOut)` Add the given resources.
    `protected 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(java.io.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
    `java.lang.String` | `getComment()` Comment of the archive
    `Zip.UnicodeExtraField` | `getCreateUnicodeExtraFields()` Whether Unicode extra fields will be created.
    `protected ZipExtraField[]` | `getCurrentExtraFields()` Provides the extra fields for the zip entry currently being added to the archive - if any.
    `java.io.File` | `getDestFile()` The file to create.
    `java.lang.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.
    `protected Zip.ArchiveState` | `getNonFileSetResourcesToAdd(ResourceCollection[] rcs, java.io.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, java.io.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, java.io.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 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 boolean` | `isEmpty(Resource[][] r)` Check is the resource arrays are empty.
    `protected 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(java.lang.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(java.io.File baseDir)` Directory from which to archive files; optional.
    `void` | `setComment(java.lang.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 void` | `setCurrentExtraFields(ZipExtraField[] extra)` Sets the extra fields for the zip entry currently being added to the archive - if any.
    `void` | `setDestFile(java.io.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(java.lang.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(java.io.File file)` Deprecated. since 1.5.x. Use setDestFile(File) instead.
    `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` | `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(java.io.File zipFile)` Deprecated. since 1.5.x. Use setDestFile(File) instead.
    `protected void` | `zipDir(java.io.File dir, ZipOutputStream zOut, java.lang.String vPath, int mode)` Add a directory to the zip stream.
    `protected void` | `zipDir(java.io.File dir, ZipOutputStream zOut, java.lang.String vPath, int mode, ZipExtraField[] extra)` Add a directory to the zip stream.
    `protected void` | `zipDir(Resource dir, ZipOutputStream zOut, java.lang.String vPath, int mode, ZipExtraField[] extra)` Add a directory to the zip stream.
    `protected void` | `zipFile(java.io.File file, ZipOutputStream zOut, java.lang.String vPath, int mode)` Method that gets called when adding from `java.io.File` instances.
    `protected void` | `zipFile(java.io.InputStream in, ZipOutputStream zOut, java.lang.String vPath, long lastModified, java.io.File fromArchive, int mode)` Adds a new entry to the archive, takes care of duplicates as well.
    `protected void` | `zipFile(java.io.InputStream in, ZipOutputStream zOut, java.lang.String vPath, long lastModified, java.io.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 Detail

    - #### zipFile

          protected java.io.File zipFile

    - #### entries

          protected java.util.Hashtable<java.lang.String,java.lang.String> entries

    - #### duplicate

          protected java.lang.String duplicate

    - #### archiveType

          protected java.lang.String archiveType

    - #### emptyBehavior

          protected java.lang.String emptyBehavior

    - #### addedDirs

          protected java.util.Hashtable<java.lang.String,java.lang.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 Detail

    - #### Zip

          public Zip()

  - ### Method Detail

    - #### 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(java.io.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(java.io.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(java.io.File destFile)

      The file to create; required.
      Parameters:
        `destFile` - The new destination File
      Since:
        Ant 1.5

    - #### getDestFile

          public java.io.File getDestFile()

      The file to create.
      Returns:
        the destination file
      Since:
        Ant 1.5.2

    - #### setBasedir

          public void setBasedir(java.io.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(java.lang.String encoding)

      Encoding to use for filenames, defaults to the platform's default encoding.

      For a list of possible values see http://java.sun.com/j2se/1.5.0/docs/guide/intl/encoding.doc.html.

      Parameters:
        `encoding` - the encoding name

    - #### getEncoding

          public java.lang.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(java.lang.String comment)

      Comment to use for archive.
      Parameters:
        `comment` - The content of the comment.
      Since:
        Ant 1.6.3

    - #### getComment

          public java.lang.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.
      Since:
        Ant 1.8.0

    - #### getPreserve0Permissions

          public boolean getPreserve0Permissions()

      Assume 0 Unix mode is intentional.
      Since:
        Ant 1.8.0

    - #### setUseLanguageEncodingFlag

          public void setUseLanguageEncodingFlag(boolean b)

      Whether to set the language encoding flag.
      Since:
        Ant 1.8.0

    - #### getUseLanguageEnodingFlag

          public boolean getUseLanguageEnodingFlag()

      Whether the language encoding flag will be used.
      Since:
        Ant 1.8.0

    - #### setCreateUnicodeExtraFields

          public void setCreateUnicodeExtraFields(Zip.UnicodeExtraField b)

      Whether Unicode extra fields will be created.
      Since:
        Ant 1.8.0

    - #### getCreateUnicodeExtraFields

          public Zip.UnicodeExtraField getCreateUnicodeExtraFields()

      Whether Unicode extra fields will be created.
      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.

      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.
      Since:
        Ant 1.8.0

    - #### setZip64Mode

          public void setZip64Mode(Zip.Zip64ModeAttribute b)

      Whether Zip64 extensions should be used.
      Since:
        Ant 1.9.1

    - #### getZip64Mode

          public Zip.Zip64ModeAttribute getZip64Mode()

      Whether Zip64 extensions will be used.
      Since:
        Ant 1.9.1

    - #### 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 java.io.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:
        `java.io.IOException` - on error
      Since:
        Ant 1.5.2

    - #### addResources

          protected final void addResources(ResourceCollection rc,
                          Resource[] resources,
                          ZipOutputStream zOut)
                                     throws java.io.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:
        `java.io.IOException` - on error
      Since:
        Ant 1.7

    - #### initZipOutputStream

          protected void initZipOutputStream(ZipOutputStream zOut)
                                      throws java.io.IOException,
                                             BuildException

      method for subclasses to override
      Parameters:
        `zOut` - the zip output stream
      Throws:
        `java.io.IOException` - on output error
        `BuildException` - on other errors

    - #### finalizeZipOutputStream

          protected void finalizeZipOutputStream(ZipOutputStream zOut)
                                          throws java.io.IOException,
                                                 BuildException

      method for subclasses to override
      Parameters:
        `zOut` - the zip output stream
      Throws:
        `java.io.IOException` - on output error
        `BuildException` - on other errors

    - #### createEmptyZip

          protected boolean createEmptyZip(java.io.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,
                                           java.io.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,
                                           java.io.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,
                                                     java.io.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(java.io.File dir,
                    ZipOutputStream zOut,
                    java.lang.String vPath,
                    int mode)
                         throws java.io.IOException

      Add a directory to the zip stream.
      Parameters:
        `dir` - the directort 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:
        `java.io.IOException` - on error
      Since:
        Ant 1.5.2

    - #### zipDir

          protected void zipDir(java.io.File dir,
                    ZipOutputStream zOut,
                    java.lang.String vPath,
                    int mode,
                    ZipExtraField[] extra)
                         throws java.io.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:
        `java.io.IOException` - on error
      Since:
        Ant 1.6.3

    - #### zipDir

          protected void zipDir(Resource dir,
                    ZipOutputStream zOut,
                    java.lang.String vPath,
                    int mode,
                    ZipExtraField[] extra)
                         throws java.io.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:
        `java.io.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.
      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.
      Since:
        Ant 1.8.0

    - #### zipFile

          protected void zipFile(java.io.InputStream in,
                     ZipOutputStream zOut,
                     java.lang.String vPath,
                     long lastModified,
                     java.io.File fromArchive,
                     int mode)
                          throws java.io.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:
        `java.io.IOException` - on error
      Since:
        Ant 1.5.2

    - #### zipFile

          protected final void zipFile(java.io.InputStream in,
                     ZipOutputStream zOut,
                     java.lang.String vPath,
                     long lastModified,
                     java.io.File fromArchive,
                     int mode,
                     ZipExtraField[] extra)
                                throws java.io.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:
        `java.io.IOException` - on error
      Since:
        Ant 1.8.0

    - #### zipFile

          protected void zipFile(java.io.File file,
                     ZipOutputStream zOut,
                     java.lang.String vPath,
                     int mode)
                          throws java.io.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:
        `java.io.IOException` - on error
      Since:
        Ant 1.5.2

    - #### addParentDirs

          protected final void addParentDirs(java.io.File baseDir,
                           java.lang.String entry,
                           ZipOutputStream zOut,
                           java.lang.String prefix,
                           int dirMode)
                                      throws java.io.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:
        `java.io.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
      Returns:
        the filters resources
      Since:
        Ant 1.8.0

    - #### logWhenWriting

          protected void logWhenWriting(java.lang.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.
      Since:
        Ant 1.8.0