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Manifest

public class Manifest
extends Object implements Cloneable

java.lang.Object
   ↳ java.util.jar.Manifest


The Manifest class is used to maintain Manifest entry names and their associated Attributes. There are main Manifest Attributes as well as per-entry Attributes. For information on the Manifest format, please see the Manifest format specification.

See also:

Summary

Public constructors

Manifest()

Constructs a new, empty Manifest.

Manifest(InputStream is)

Constructs a new Manifest from the specified input stream.

Manifest(Manifest man)

Constructs a new Manifest that is a copy of the specified Manifest.

Public methods

void clear()

Clears the main Attributes as well as the entries in this Manifest.

Object clone()

Returns a shallow copy of this Manifest.

boolean equals(Object o)

Returns true if the specified Object is also a Manifest and has the same main Attributes and entries.

Attributes getAttributes(String name)

Returns the Attributes for the specified entry name.

Map<StringAttributes> getEntries()

Returns a Map of the entries contained in this Manifest.

Attributes getMainAttributes()

Returns the main Attributes for the Manifest.

int hashCode()

Returns the hash code for this Manifest.

void read(InputStream is)

Reads the Manifest from the specified InputStream.

void write(OutputStream out)

Writes the Manifest to the specified OutputStream.

Inherited methods

From class java.lang.Object

Public constructors

Manifest

Added in API level 1
Manifest ()

Constructs a new, empty Manifest.

Manifest

Added in API level 1
Manifest (InputStream is)

Constructs a new Manifest from the specified input stream.

Parameters
is InputStream: the input stream containing manifest data
Throws
IOException if an I/O error has occured

Manifest

Added in API level 1
Manifest (Manifest man)

Constructs a new Manifest that is a copy of the specified Manifest.

Parameters
man Manifest: the Manifest to copy

Public methods

clear

Added in API level 1
void clear ()

Clears the main Attributes as well as the entries in this Manifest.

clone

Added in API level 1
Object clone ()

Returns a shallow copy of this Manifest. The shallow copy is implemented as follows:

     public Object clone() { return new Manifest(this); }
 

Returns
Object a shallow copy of this Manifest

equals

Added in API level 1
boolean equals (Object o)

Returns true if the specified Object is also a Manifest and has the same main Attributes and entries.

Parameters
o Object: the object to be compared
Returns
boolean true if the specified Object is also a Manifest and has the same main Attributes and entries

getAttributes

Added in API level 1
Attributes getAttributes (String name)

Returns the Attributes for the specified entry name. This method is defined as:

      return (Attributes)getEntries().get(name)
 
Though null is a valid name, when getAttributes(null) is invoked on a Manifest obtained from a jar file, null will be returned. While jar files themselves do not allow null-named attributes, it is possible to invoke getEntries() on a Manifest, and on that result, invoke put with a null key and an arbitrary value. Subsequent invocations of getAttributes(null) will return the just-put value.

Note that this method does not return the manifest's main attributes; see getMainAttributes().

Parameters
name String: entry name
Returns
Attributes the Attributes for the specified entry name

getEntries

Added in API level 1
Map<StringAttributes> getEntries ()

Returns a Map of the entries contained in this Manifest. Each entry is represented by a String name (key) and associated Attributes (value). The Map permits the null key, but no entry with a null key is created by read(InputStream), nor is such an entry written by using write(OutputStream).

Returns
Map<StringAttributes> a Map of the entries contained in this Manifest

getMainAttributes

Added in API level 1
Attributes getMainAttributes ()

Returns the main Attributes for the Manifest.

Returns
Attributes the main Attributes for the Manifest

hashCode

Added in API level 1
int hashCode ()

Returns the hash code for this Manifest.

Returns
int a hash code value for this object.

read

Added in API level 1
void read (InputStream is)

Reads the Manifest from the specified InputStream. The entry names and attributes read will be merged in with the current manifest entries.

Parameters
is InputStream: the input stream
Throws
IOException if an I/O error has occurred

write

Added in API level 1
void write (OutputStream out)

Writes the Manifest to the specified OutputStream. Attributes.Name.MANIFEST_VERSION must be set in MainAttributes prior to invoking this method.

Parameters
out OutputStream: the output stream
Throws
IOException if an I/O error has occurred

See also:

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