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org.jdaemon.era
Class AbstractCubeDirectory  

java.lang.Object
  org.jdaemon.era.AbstractCubeDirectory

All Implemented Interfaces:

CubeDirectory

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public abstract class AbstractCubeDirectory

extends java.lang.Object

implements CubeDirectory

Base implementation for cube directories Assumes an index of cubes exists on a given attribute set. Implements getCube and getValues in terms of abstract operations on this index. Note: At some stage this implementation should be extended to handle multiple indexes

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Constructor Summary

AbstractCubeDirectory()

 

Method Summary
Cube	getCube(CubeDirectoryPath path)           Get a Cube object for the given directory path.
protected  Cube	getCube(CubeDirectoryPath path, org.jdaemon.util.QuickList attributes, org.jdaemon.util.QuickList bound_values)           Recursive implementation of getCube(path) Takes the given CubeDirectoryPath and composes a Cube by looking up sub-cubes with getCube(QuickList) and returning a union of the results
protected abstract  Cube	getCube(org.jdaemon.util.QuickList bound_values)
abstract  CubeDescriptor	getCubeDescriptor()           Get metadata for the cubes contained by this Directory
abstract  java.util.List	getKeyAttributes()           Get an iterator over the key attributes used by this directory
java.util.Iterator	getKeyValues(CubeDirectoryPath path, java.lang.String attribute)           List all values of the given key attribute contained by this directory
protected  java.util.Iterator	getKeyValues(CubeDirectoryPath path, java.lang.String attribute, org.jdaemon.util.QuickList attributes, org.jdaemon.util.QuickList bound_values)           Recursive implementation of getKeyValues(path, attribute) Takes the given CubeDirectoryPath and composes an iterator over possible values of the key attribute.
protected abstract  java.util.Iterator	getKeyValues(org.jdaemon.util.QuickList bound_values, java.lang.String attr)           List all values of the given key attribute contained by this directory.
CubeDirectoryPath	getPath()           Create an AbstractDirectoryPath object.

 

Methods inherited from class java.lang.Object

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

 

Constructor Detail

AbstractCubeDirectory

public AbstractCubeDirectory()

Method Detail

getPath

public CubeDirectoryPath getPath()

Create an AbstractDirectoryPath object.

Specified by:

getPath in interface CubeDirectory

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getCube

protected Cube getCube(CubeDirectoryPath path,
                       org.jdaemon.util.QuickList attributes,
                       org.jdaemon.util.QuickList bound_values)

Recursive implementation of getCube(path) Takes the given CubeDirectoryPath and composes a Cube by looking up sub-cubes with getCube(QuickList) and returning a union of the results

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getCube

public Cube getCube(CubeDirectoryPath path)

Get a Cube object for the given directory path. Takes the given CubeDirectoryPath and composes a Cube buy looking up sub-cubes with getCube(QuickList) and creating compound cubes as appropriate. Implemented by the protected method getCube(path, attributes, values).

Specified by:

getCube in interface CubeDirectory

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getKeyValues

protected java.util.Iterator getKeyValues(CubeDirectoryPath path,
                                          java.lang.String attribute,
                                          org.jdaemon.util.QuickList attributes,
                                          org.jdaemon.util.QuickList bound_values)

Recursive implementation of getKeyValues(path, attribute) Takes the given CubeDirectoryPath and composes an iterator over possible values of the key attribute. An attempt is made to prune values which are excluded by the constraints in the path.

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getKeyValues

public java.util.Iterator getKeyValues(CubeDirectoryPath path,
                                       java.lang.String attribute)

List all values of the given key attribute contained by this directory

Specified by:

getKeyValues in interface CubeDirectory

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getCubeDescriptor

public abstract CubeDescriptor getCubeDescriptor()

Get metadata for the cubes contained by this Directory

Specified by:

getCubeDescriptor in interface CubeDirectory

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getKeyAttributes

public abstract java.util.List getKeyAttributes()

Get an iterator over the key attributes used by this directory

Specified by:

getKeyAttributes in interface CubeDirectory

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getKeyValues

protected abstract java.util.Iterator getKeyValues(org.jdaemon.util.QuickList bound_values,
                                                   java.lang.String attr)

List all values of the given key attribute contained by this directory.

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getCube

protected abstract Cube getCube(org.jdaemon.util.QuickList bound_values)

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