weka.core.packageManagement

Class DefaultPackage

java.lang.Object

weka.core.packageManagement.Package

weka.core.packageManagement.DefaultPackage

All Implemented Interfaces:

Serializable, Cloneable

public class DefaultPackage
extends Package
implements Serializable

A concrete implementation of Package that uses Java properties files/classes to manage package meta data. Assumes that meta data for individual packages is stored on the central repository (or possibly in a local cache - both accessible via http) in properties files that live in a sub-directory with the same name as the package. Furthermore, each property file is assumed to be named as the version number of the package in question with a ".props" extension. A "Latest.props" file should exist for each package and should always hold meta data on the latest version of a package.

Version:

$Revision: 52462 $

Author:

mhall (mhall{[at]}pentaho{[dot]}com).

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
DefaultPackage(File packageHome, PackageManager manager) Constructs a new DefaultPackage.
DefaultPackage(File packageHome, PackageManager manager, Map<?,?> packageMetaData) Constructs an new DefaultPackage.

Method Summary

Modifier and Type	Method and Description
Object	clone() Clone this package.
List<Dependency>	getBaseSystemDependency() Gets the dependency on the base system that this package requires.
List<Dependency>	getDependencies() Get the list of packages that this package depends on.
List<Dependency>	getIncompatibleDependencies() Gets a list of installed packages that this package depends on that are currently incompatible with this package.
List<Dependency>	getIncompatibleDependencies(List<Package> packages) Gets those packages from the supplied list that this package depends on and are currently incompatible with this package.
List<Dependency>	getMissingDependencies() Gets a list of packages that this package depends on that are not currently installed.
List<Dependency>	getMissingDependencies(List<Package> packages) Gets a list of packages that this package depends on that are not in the supplied list of packages.
String	getName() Convenience method to return the name of this package.
URL	getPackageURL() Convenience method that returns the URL to the package (i.e the provider's URL).
void	install() Install this package.
boolean	isCompatibleBaseSystem() Returns true if this package is compatible with the currently installed version of the base system.
boolean	isInstalled() Returns true if this package is already installed
static void	main(String[] args)
void	setPackageManager(PackageManager p) Set the package manager for this package
void	setPackageMetaDataElement(Object key, Object value) Adds a key, value pair to the meta data map.
String	toString()

Methods inherited from class weka.core.packageManagement.Package

equals, getPackageMetaData, getPackageMetaDataElement, setPackageMetaData

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

DefaultPackage

public DefaultPackage(File packageHome,
                      PackageManager manager,
                      Map<?,?> packageMetaData)

Constructs an new DefaultPackage.

Parameters:

packageHome - the directory that packages are installed into.

manager - the package manager in use.

packageMetaData - A Map of package meta data for this package.

DefaultPackage

public DefaultPackage(File packageHome,
                      PackageManager manager)

Constructs a new DefaultPackage.

Parameters:

packageHome - the directory that packages are installed into.

manager - the package manager in use.

Method Detail

clone

public Object clone()

Clone this package. Only makes a shallow copy of the meta data map

Specified by:

clone in class Package

Returns:

a copy of this package

setPackageManager

public void setPackageManager(PackageManager p)

Set the package manager for this package

Parameters:

p - the package manager to use

getPackageURL

public URL getPackageURL()
                  throws Exception

Convenience method that returns the URL to the package (i.e the provider's URL). This information is assumed to be stored in the package meta data.

Specified by:

getPackageURL in class Package

Returns:

the URL to the package or null if the URL is not available for some reason

Throws:

Exception - if the URL can't be retrieved for some reason

getName

public String getName()

Convenience method to return the name of this package.

Specified by:

getName in class Package

Returns:

the name of this package.

getDependencies

public List<Dependency> getDependencies()
                                 throws Exception

Get the list of packages that this package depends on.

Specified by:

getDependencies in class Package

Returns:

the list of packages that this package depends on.

Throws:

Exception - if a problem occurs while getting the list of dependencies.

getBaseSystemDependency

public List<Dependency> getBaseSystemDependency()
                                         throws Exception

Gets the dependency on the base system that this package requires.

Specified by:

getBaseSystemDependency in class Package

Returns:

the base system dependency(s) for this package

Throws:

Exception - if the base system dependency can't be determined for some reason.

getMissingDependencies

public List<Dependency> getMissingDependencies(List<Package> packages)
                                        throws Exception

Gets a list of packages that this package depends on that are not in the supplied list of packages.

Specified by:

getMissingDependencies in class Package

Parameters:

packages - a list of packages to compare this package's dependencies against.

Returns:

those packages that this package depends on that aren't in the supplied list.

Throws:

Exception - if the list of missing depenencies can't be determined for some reason.

getMissingDependencies

public List<Dependency> getMissingDependencies()
                                        throws Exception

Gets a list of packages that this package depends on that are not currently installed.

Specified by:

getMissingDependencies in class Package

Returns:

a list of missing packages that this package depends on.

Throws:

Exception

getIncompatibleDependencies

public List<Dependency> getIncompatibleDependencies(List<Package> packages)
                                             throws Exception

Gets those packages from the supplied list that this package depends on and are currently incompatible with this package.

Specified by:

getIncompatibleDependencies in class Package

Parameters:

packages - a list of packages to compare this package's dependencies against

Returns:

those packages from the supplied list that are incompatible with respect to this package's dependencies

Throws:

Exception - if the list of incompatible dependencies can't be generated for some reason.

getIncompatibleDependencies

public List<Dependency> getIncompatibleDependencies()
                                             throws Exception

Gets a list of installed packages that this package depends on that are currently incompatible with this package.

Specified by:

getIncompatibleDependencies in class Package

Returns:

a list of incompatible installed packages that this package depends on.

Throws:

Exception

isCompatibleBaseSystem

public boolean isCompatibleBaseSystem()
                               throws Exception

Returns true if this package is compatible with the currently installed version of the base system.

Specified by:

isCompatibleBaseSystem in class Package

Returns:

true if this package is compatible with the main software system.

Throws:

Exception - if a problem occurs while checking compatibility.

install

public void install()
             throws Exception

Install this package.

Specified by:

install in class Package

Throws:

Exception - if something goes wrong during installation.

isInstalled

public boolean isInstalled()

Returns true if this package is already installed

Specified by:

isInstalled in class Package

Returns:

true if this package is installed

main

public static void main(String[] args)

setPackageMetaDataElement

public void setPackageMetaDataElement(Object key,
                                      Object value)
                               throws Exception

Adds a key, value pair to the meta data map.

Specified by:

setPackageMetaDataElement in class Package

Parameters:

key - the key

value - the value to add

Throws:

Exception - if there is no meta data map to add to.

toString

public String toString()

Overrides:

toString in class Object