Jar (Apache Ant API)
Date: 2015-06-29

org.apache.tools.ant.taskdefs

## Class Jar

- 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
        - - org.apache.tools.ant.taskdefs.Jar

- All Implemented Interfaces:
    java.lang.Cloneable, SelectorContainer
  Direct Known Subclasses:
    Ear, War

      public class Jar
      extends Zip

  Creates a JAR archive.
  Since:
    Ant 1.1

- - ### Nested Class Summary

    Nested Classes
    Modifier and Type | Class and Description
    --- | ---
    `static class` | `Jar.FilesetManifestConfig` The manifest config enumerated type.
    `static class` | `Jar.StrictMode` The strict enumerated type.

    - ### Nested classes/interfaces inherited from class org.apache.tools.ant.taskdefs.Zip

      `Zip.ArchiveState, Zip.Duplicate, Zip.UnicodeExtraField, Zip.WhenEmpty, Zip.Zip64ModeAttribute`

  - ### Field Summary

    - ### Fields inherited from class org.apache.tools.ant.taskdefs.Zip

      `addedDirs, archiveType, doubleFilePass, duplicate, emptyBehavior, entries, skipWriting, 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
    `Jar()` constructor

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `addConfiguredIndexJars(Path p)` Add a path to index jars.
    `void` | `addConfiguredManifest(Manifest newManifest)` Allows the manifest for the archive file to be provided inline in the build file rather than in an external file.
    `void` | `addConfiguredService(Service service)` A nested SPI service element.
    `void` | `addMetainf(ZipFileSet fs)` Adds a zipfileset to include in the META-INF directory.
    `protected void` | `cleanUp()` Make sure we don't think we already have a MANIFEST next time this task gets executed.
    `protected boolean` | `createEmptyZip(java.io.File zipFile)` Create an empty jar file.
    `protected void` | `finalizeZipOutputStream(ZipOutputStream zOut)` Finalize the zip output stream.
    `protected static java.lang.String` | `findJarName(java.lang.String fileName, java.lang.String[] classpath)` try to guess the name of the given file.
    `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.
    `protected static void` | `grabFilesAndDirs(java.lang.String file, java.util.List<java.lang.String> dirs, java.util.List<java.lang.String> files)` Grab lists of all root-level files and all directories contained in the given archive.
    `protected void` | `initZipOutputStream(ZipOutputStream zOut)` Initialize the zip output stream.
    `void` | `reset()` reset to default values.
    `void` | `setFilesetmanifest(Jar.FilesetManifestConfig config)` Behavior when a Manifest is found in a zipfileset or zipgroupfileset file.
    `void` | `setFlattenAttributes(boolean b)` Whether to flatten multi-valued attributes (i.e.
    `void` | `setIndex(boolean flag)` Set whether or not to create an index list for classes.
    `void` | `setIndexMetaInf(boolean flag)` Set whether or not to add META-INF and its children to the index.
    `void` | `setJarfile(java.io.File jarFile)` Deprecated. since 1.5.x. Use setDestFile(File) instead.
    `void` | `setManifest(java.io.File manifestFile)` The manifest file to use.
    `void` | `setManifestEncoding(java.lang.String manifestEncoding)` The character encoding to use in the manifest file.
    `void` | `setMergeClassPathAttributes(boolean b)` Whether to merge Class-Path attributes.
    `void` | `setStrict(Jar.StrictMode strict)` Activate the strict mode.
    `void` | `setWhenempty(Zip.WhenEmpty we)` Not used for jar files.
    `void` | `setWhenmanifestonly(Zip.WhenEmpty we)` Indicates if a jar file should be created when it would only contain a manifest file.
    `protected void` | `writeIndexLikeList(java.util.List<java.lang.String> dirs, java.util.List<java.lang.String> files, java.io.PrintWriter writer)` Writes the directory entries from the first and the filenames from the second list to the given writer, one entry per line.
    `protected void` | `zipFile(java.io.InputStream is, ZipOutputStream zOut, java.lang.String vPath, long lastModified, java.io.File fromArchive, int mode)` Overridden from Zip class to deal with manifests and index lists.

    - ### Methods inherited from class org.apache.tools.ant.taskdefs.Zip

      `add, addFileset, addParentDirs, addResources, addResources, addZipfileset, addZipGroupFileset, execute, executeMain, getComment, getCreateUnicodeExtraFields, getCurrentExtraFields, getDestFile, getEncoding, getFallBackToUTF8, getLevel, getNonFileSetResourcesToAdd, getPreserve0Permissions, getResourcesToAdd, getUseLanguageEnodingFlag, getZip64Mode, grabNonFileSetResources, grabResources, hasUpdatedFile, isAddingNewFiles, isCompress, isEmpty, isFirstPass, isInUpdateMode, logWhenWriting, selectDirectoryResources, selectFileResources, selectResources, setBasedir, setComment, setCompress, setCreateUnicodeExtraFields, setCurrentExtraFields, setDestFile, setDuplicate, setEncoding, setFallBackToUTF8, setFile, setFilesonly, setKeepCompression, setLevel, setPreserve0Permissions, setRoundUp, setUpdate, setUseLanguageEncodingFlag, setZip64Mode, setZipfile, zipDir, zipDir, zipDir, zipFile, zipFile`

    - ### 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`

- - ### Constructor Detail

    - #### Jar

          public Jar()

      constructor

  - ### Method Detail

    - #### setWhenempty

          public void setWhenempty(Zip.WhenEmpty we)

      Not used for jar files.
      Overrides:
        `setWhenempty` in class `Zip`
      Parameters:
        `we` - not used

    - #### setWhenmanifestonly

          public void setWhenmanifestonly(Zip.WhenEmpty we)

      Indicates if a jar file should be created when it would only contain a manifest file. 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 only a manifest file). Default is `create`;
      Parameters:
        `we` - a `WhenEmpty` enumerated value

    - #### setStrict

          public void setStrict(Jar.StrictMode strict)

      Activate the strict mode. When set to true a BuildException will be thrown if the Jar-Packaging specification was broken.
      Parameters:
        `strict` - New value of the strict mode.
      Since:
        Ant 1.7.1

    - #### setJarfile

          public void setJarfile(java.io.File jarFile)

      Deprecated. since 1.5.x. Use setDestFile(File) instead.
      Set the destination file.
      Parameters:
        `jarFile` - the destination file

    - #### setIndex

          public void setIndex(boolean flag)

      Set whether or not to create an index list for classes. This may speed up classloading in some cases.
      Parameters:
        `flag` - a `boolean` value

    - #### setIndexMetaInf

          public void setIndexMetaInf(boolean flag)

      Set whether or not to add META-INF and its children to the index.

      Doesn't have any effect if index is false.

      Sun's jar implementation used to skip the META-INF directory and Ant followed that example. The behavior has been changed with Java 5. In order to avoid problems with Ant generated jars on Java 1.4 or earlier Ant will not include META-INF unless explicitly asked to.

      Parameters:
        `flag` - a `boolean` value, defaults to false
      Since:
        Ant 1.8.0
      See Also:
        jar -i omits service providers in index.list

    - #### setManifestEncoding

          public void setManifestEncoding(java.lang.String manifestEncoding)

      The character encoding to use in the manifest file.
      Parameters:
        `manifestEncoding` - the character encoding

    - #### addConfiguredManifest

          public void addConfiguredManifest(Manifest newManifest)
                                     throws ManifestException

      Allows the manifest for the archive file to be provided inline in the build file rather than in an external file.
      Parameters:
        `newManifest` - an embedded manifest element
      Throws:
        `ManifestException` - on error

    - #### setManifest

          public void setManifest(java.io.File manifestFile)

      The manifest file to use. This can be either the location of a manifest, or the name of a jar added through a fileset. If its the name of an added jar, the task expects the manifest to be in the jar at META-INF/MANIFEST.MF.
      Parameters:
        `manifestFile` - the manifest file to use.

    - #### setFilesetmanifest

          public void setFilesetmanifest(Jar.FilesetManifestConfig config)

      Behavior when a Manifest is found in a zipfileset or zipgroupfileset file. Valid values are "skip", "merge", and "mergewithoutmain". "merge" will merge all of manifests together, and merge this into any other specified manifests. "mergewithoutmain" merges everything but the Main section of the manifests. Default value is "skip". Note: if this attribute's value is not "skip", the created jar will not be readable by using java.util.jar.JarInputStream
      Parameters:
        `config` - setting for found manifest behavior.

    - #### addMetainf

          public void addMetainf(ZipFileSet fs)

      Adds a zipfileset to include in the META-INF directory.
      Parameters:
        `fs` - zipfileset to add

    - #### addConfiguredIndexJars

          public void addConfiguredIndexJars(Path p)

      Add a path to index jars.
      Parameters:
        `p` - a path
      Since:
        Ant 1.6.2

    - #### addConfiguredService

          public void addConfiguredService(Service service)

      A nested SPI service element.
      Parameters:
        `service` - the nested element.
      Since:
        Ant 1.7

    - #### setMergeClassPathAttributes

          public void setMergeClassPathAttributes(boolean b)

      Whether to merge Class-Path attributes.
      Since:
        Ant 1.8.0

    - #### setFlattenAttributes

          public void setFlattenAttributes(boolean b)

      Whether to flatten multi-valued attributes (i.e. Class-Path) into a single one.
      Since:
        Ant 1.8.0

    - #### initZipOutputStream

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

      Initialize the zip output stream.
      Overrides:
        `initZipOutputStream` in class `Zip`
      Parameters:
        `zOut` - the zip output stream
      Throws:
        `java.io.IOException` - on I/O errors
        `BuildException` - on other errors

    - #### finalizeZipOutputStream

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

      Finalize the zip output stream. This creates an index list if the index attribute is true.
      Overrides:
        `finalizeZipOutputStream` in class `Zip`
      Parameters:
        `zOut` - the zip output stream
      Throws:
        `java.io.IOException` - on I/O errors
        `BuildException` - on other errors

    - #### zipFile

          protected void zipFile(java.io.InputStream is,
                     ZipOutputStream zOut,
                     java.lang.String vPath,
                     long lastModified,
                     java.io.File fromArchive,
                     int mode)
                          throws java.io.IOException

      Overridden from Zip class to deal with manifests and index lists.
      Overrides:
        `zipFile` in class `Zip`
      Parameters:
        `is` - the stream to read data for the entry from. The caller of the method is responsible for closing the stream.
        `zOut` - the zip output stream
        `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

    - #### 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.

      Overrides:
        `getResourcesToAdd` in class `Zip`
      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

    - #### createEmptyZip

          protected boolean createEmptyZip(java.io.File zipFile)
                                    throws BuildException

      Create an empty jar file.
      Overrides:
        `createEmptyZip` in class `Zip`
      Parameters:
        `zipFile` - the file to create
      Returns:
        true for historic reasons
      Throws:
        `BuildException` - on error

    - #### cleanUp

          protected void cleanUp()

      Make sure we don't think we already have a MANIFEST next time this task gets executed.
      Overrides:
        `cleanUp` in class `Zip`
      See Also:
        `Zip.cleanUp()`

    - #### reset

          public void reset()

      reset to default values.
      Overrides:
        `reset` in class `Zip`
      Since:
        1.44, Ant 1.5
      See Also:
        `Zip.reset()`

    - #### writeIndexLikeList

          protected final void writeIndexLikeList(java.util.List<java.lang.String> dirs,
                                java.util.List<java.lang.String> files,
                                java.io.PrintWriter writer)
                                           throws java.io.IOException

      Writes the directory entries from the first and the filenames from the second list to the given writer, one entry per line.
      Parameters:
        `dirs` - a list of directories
        `files` - a list of files
        `writer` - the writer to write to
      Throws:
        `java.io.IOException` - on error
      Since:
        Ant 1.6.2

    - #### findJarName

          protected static java.lang.String findJarName(java.lang.String fileName,
                                     java.lang.String[] classpath)

      try to guess the name of the given file.

      If this jar has a classpath attribute in its manifest, we can assume that it will only require an index of jars listed there. try to find which classpath entry is most likely the one the given file name points to.

      In the absence of a classpath attribute, assume the other files will be placed inside the same directory as this jar and use their basename.

      if there is a classpath and the given file doesn't match any of its entries, return null.

      Parameters:
        `fileName` - the name to look for
        `classpath` - the classpath to look in (may be null)
      Returns:
        the matching entry, or null if the file is not found
      Since:
        Ant 1.6.2

    - #### grabFilesAndDirs

          protected static void grabFilesAndDirs(java.lang.String file,
                              java.util.List<java.lang.String> dirs,
                              java.util.List<java.lang.String> files)
                                          throws java.io.IOException

      Grab lists of all root-level files and all directories contained in the given archive.
      Parameters:
        `file` - the zip file to examine
        `dirs` - where to place the directories found
        `files` - where to place the files found
      Throws:
        `java.io.IOException` - on error
      Since:
        Ant 1.7