Jar (Apache Ant API)
Date: 2012-02-26

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## 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
`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`

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
`Jar()` constructor

Method Summary
`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 dirs, java.util.List 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 dirs, java.util.List 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, 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, 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 dirs,
                                            java.util.List 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 dirs,
                                           java.util.List 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

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