Package weka.core.packageManagement

Class Package

java.lang.Object

weka.core.packageManagement.Package

All Implemented Interfaces:

Serializable, Cloneable

Direct Known Subclasses:

DefaultPackage

public abstract class Package
extends Object
implements Cloneable, Serializable

Abstract base class for Packages.

Version:

$Revision: 52462 $

Author:

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

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
Package()

Method Summary

Modifier and Type	Method	Description
abstract Object	clone()
boolean	equals(Package toCompare)	Compare the supplied package to this package.
abstract List<Dependency>	getBaseSystemDependency()	Gets the dependency on the base system that this package requires.
abstract List<Dependency>	getDependencies()	Get the list of packages that this package depends on.
abstract List<Dependency>	getIncompatibleDependencies()	Gets a list of installed packages that this package depends on that are currently incompatible with this package.
abstract 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.
abstract List<Dependency>	getMissingDependencies()	Gets a list of packages that this package depends on that are not currently installed.
abstract 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.
abstract String	getName()	Convenience method to return the name of this package.
Map<?,?>	getPackageMetaData()	Get the meta data for this package.
Object	getPackageMetaDataElement(Object key)	Gets the package meta data element associated with the supplied key.
abstract URL	getPackageURL()	Convenience method that returns the URL to the package (i.e the provider's URL).
abstract List<Package>	getPrecludedPackages(List<Package> packages)	Compares this package's precluded list (if any) against the list of supplied packages.
abstract void	install()	Install this package.
abstract boolean	isCompatibleBaseSystem()	Returns true if this package is compatible with the currently installed version of the base system.
abstract boolean	isInstalled()	Returns true if this package is already installed
void	setPackageMetaData(Map<?,?> metaData)	Set the meta data for this package.
abstract void	setPackageMetaDataElement(Object key, Object value)	Adds a key, value pair to the meta data map.

Methods inherited from class java.lang.Object

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

Constructor Detail

Package

public Package()

Method Detail

setPackageMetaData

public void setPackageMetaData(Map<?,?> metaData)

Set the meta data for this package.

Parameters:

metaData - the meta data for this package.

getPackageMetaData

public Map<?,?> getPackageMetaData()

Get the meta data for this package.

Returns:

the meta data for this package

getName

public abstract String getName()

Convenience method to return the name of this package.

Returns:

the name of this package.

getPackageURL

public abstract 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.

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

equals

public boolean equals(Package toCompare)

Compare the supplied package to this package. Simply does an equals() comparison between the two. Concrete subclasses should override if they wan't to do comparison based on specific package meta data elements.

Parameters:

toCompare - the package to compare against.

Returns:

true if the supplied package is equal to this one.

getDependencies

public abstract List<Dependency> getDependencies()
                                          throws Exception

Get the list of packages that this package depends on.

Returns:

the list of packages that this package depends on.

Throws:

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

isInstalled

public abstract boolean isInstalled()

Returns true if this package is already installed

Returns:

true if this package is installed

install

public abstract void install()
                      throws Exception

Install this package.

Throws:

Exception - if something goes wrong during installation.

isCompatibleBaseSystem

public abstract boolean isCompatibleBaseSystem()
                                        throws Exception

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

Returns:

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

Throws:

Exception - if a problem occurs while checking compatibility.

getBaseSystemDependency

public abstract List<Dependency> getBaseSystemDependency()
                                                  throws Exception

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

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 abstract List<Dependency> getMissingDependencies()
                                                 throws Exception

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

Returns:

a list of missing packages that this package depends on.

Throws:

Exception

getMissingDependencies

public abstract 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.

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.

getIncompatibleDependencies

public abstract List<Dependency> getIncompatibleDependencies()
                                                      throws Exception

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

Returns:

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

Throws:

Exception

getPrecludedPackages

public abstract List<Package> getPrecludedPackages(List<Package> packages)
                                            throws Exception

Compares this package's precluded list (if any) against the list of supplied packages. Any packages in the supplied list that match (by name and version constraints) any in the precluded list are returned

Parameters:

packages - a list of packages to compare against those in this package's precluded list

Returns:

a list of packages that are covered by those in the precluded list

Throws:

Exception - if a problem occurs

getIncompatibleDependencies

public abstract 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.

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.

getPackageMetaDataElement

public Object getPackageMetaDataElement(Object key)

Gets the package meta data element associated with the supplied key.

Parameters:

key - the key to use to look up a value in the meta data

Returns:

the meta data value or null if the key does not exist.

setPackageMetaDataElement

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

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

Parameters:

key - the key

value - the value to add

Throws:

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

clone

public abstract Object clone()