org.codehaus.plexus.archiver.jar
Class Manifest

java.lang.Object
  org.codehaus.plexus.archiver.jar.Manifest

public class Manifest
extends Object

Holds the data of a jar manifest.

Manifests are processed according to the Jar file specification.. Specifically, a manifest element consists of a set of attributes and sections. These sections in turn may contain attributes. Note in particular that this may result in manifest lines greater than 72 bytes being wrapped and continued on the next line. If an application can not handle the continuation mechanism, it is a defect in the application, not this task.

Since:

Ant 1.4

Nested Class Summary

static class	Manifest.Attribute An attribute for the manifest.
static class	Manifest.Section A manifest section - you can nest attribute elements into sections.

Field Summary

static String	ATTRIBUTE_CLASSPATH The Class-Path Header is special - it can be duplicated
static String	ATTRIBUTE_FROM The From Header is disallowed in a Manifest
static String	ATTRIBUTE_MANIFEST_VERSION The standard manifest version header
static String	ATTRIBUTE_NAME The Name Attribute is the first in a named section
static String	ATTRIBUTE_SIGNATURE_VERSION The standard Signature Version header
static String	DEFAULT_MANIFEST_VERSION Default Manifest version if one is not specified
static String	EOL The End-Of-Line marker in manifests
static int	MAX_LINE_LENGTH The max length of a line in a Manifest
static int	MAX_SECTION_LENGTH Max length of a line section which is continued.

Constructor Summary

Manifest()
Construct an empty manifest

Manifest(Reader r)
Read a manifest file from the given reader

Method Summary

void	addConfiguredAttribute(Manifest.Attribute attribute) Add an attribute to the manifest - it is added to the main section.
void	addConfiguredSection(Manifest.Section section) Add a section to the manifest
boolean	equals(Object rhs)
static Manifest	getDefaultManifest() Construct a manifest from Ant's default manifest file.
Manifest.Section	getMainSection() Get the main section of the manifest
String	getManifestVersion() Get the version of the manifest
Manifest.Section	getSection(String name) Get a particular section from the manifest
Enumeration	getSectionNames() Get the section names in this manifest.
Enumeration	getWarnings() Get the warnings for this manifest.
int	hashCode()
void	merge(Manifest other) Merge the contents of the given manifest into this manifest
void	merge(Manifest other, boolean overwriteMain) Merge the contents of the given manifest into this manifest
String	toString() Convert the manifest to its string representation
void	write(PrintWriter writer) Write the manifest out to a print writer.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

ATTRIBUTE_MANIFEST_VERSION

public static final String ATTRIBUTE_MANIFEST_VERSION

The standard manifest version header

See Also:

Constant Field Values

ATTRIBUTE_SIGNATURE_VERSION

public static final String ATTRIBUTE_SIGNATURE_VERSION

The standard Signature Version header

See Also:

Constant Field Values

ATTRIBUTE_NAME

public static final String ATTRIBUTE_NAME

The Name Attribute is the first in a named section

See Also:

Constant Field Values

ATTRIBUTE_FROM

public static final String ATTRIBUTE_FROM

The From Header is disallowed in a Manifest

See Also:

Constant Field Values

ATTRIBUTE_CLASSPATH

public static final String ATTRIBUTE_CLASSPATH

The Class-Path Header is special - it can be duplicated

See Also:

Constant Field Values

DEFAULT_MANIFEST_VERSION

public static final String DEFAULT_MANIFEST_VERSION

Default Manifest version if one is not specified

See Also:

Constant Field Values

MAX_LINE_LENGTH

public static final int MAX_LINE_LENGTH

The max length of a line in a Manifest

See Also:

Constant Field Values

MAX_SECTION_LENGTH

public static final int MAX_SECTION_LENGTH

Max length of a line section which is continued. Need to allow for the CRLF.

See Also:

Constant Field Values

EOL

public static final String EOL

The End-Of-Line marker in manifests

See Also:

Constant Field Values

Constructor Detail

Manifest

public Manifest()

Construct an empty manifest

Manifest

public Manifest(Reader r)
         throws ManifestException,
                IOException

Read a manifest file from the given reader

Parameters:

r - is the reader from which the Manifest is read

Throws:

ManifestException - if the manifest is not valid according to the JAR spec

IOException - if the manifest cannot be read from the reader.

Method Detail

getDefaultManifest

public static Manifest getDefaultManifest()
                                   throws ArchiverException

Construct a manifest from Ant's default manifest file.

Returns:

the default manifest.

Throws:

ArchiverException - if there is a problem loading the default manifest

addConfiguredSection

public void addConfiguredSection(Manifest.Section section)
                          throws ManifestException

Add a section to the manifest

Parameters:

section - the manifest section to be added

Throws:

ManifestException - if the secti0on is not valid.

addConfiguredAttribute

public void addConfiguredAttribute(Manifest.Attribute attribute)
                            throws ManifestException

Add an attribute to the manifest - it is added to the main section.

Parameters:

attribute - the attribute to be added.

Throws:

ManifestException - if the attribute is not valid.

merge

public void merge(Manifest other)
           throws ManifestException

Merge the contents of the given manifest into this manifest

Parameters:

other - the Manifest to be merged with this one.

Throws:

ManifestException - if there is a problem merging the manifest according to the Manifest spec.

merge

public void merge(Manifest other,
                  boolean overwriteMain)
           throws ManifestException

Merge the contents of the given manifest into this manifest

Parameters:

other - the Manifest to be merged with this one.

overwriteMain - whether to overwrite the main section of the current manifest

Throws:

ManifestException - if there is a problem merging the manifest according to the Manifest spec.

write

public void write(PrintWriter writer)
           throws IOException

Write the manifest out to a print writer.

Parameters:

writer - the Writer to which the manifest is written

Throws:

IOException - if the manifest cannot be written

toString

public String toString()

Convert the manifest to its string representation

Overrides:

toString in class Object

Returns:

a multiline string with the Manifest as it appears in a Manifest file.

getWarnings

public Enumeration getWarnings()

Get the warnings for this manifest.

Returns:

an enumeration of warning strings

hashCode

public int hashCode()

Overrides:

hashCode in class Object

See Also:

Object.hashCode()

equals

public boolean equals(Object rhs)

Overrides:

equals in class Object

See Also:

Object.equals(java.lang.Object)

getManifestVersion

public String getManifestVersion()

Get the version of the manifest

Returns:

the manifest's version string

getMainSection

public Manifest.Section getMainSection()

Get the main section of the manifest

Returns:

the main section of the manifest

getSection

public Manifest.Section getSection(String name)

Get a particular section from the manifest

Parameters:

name - the name of the section desired.

Returns:

the specified section or null if that section does not exist in the manifest

getSectionNames

public Enumeration getSectionNames()

Get the section names in this manifest.

Returns:

an Enumeration of section names