org.gcube.data.tr

Interface Store

All Superinterfaces:

Serializable

All Known Implementing Classes:

NeoStore

public interface Store
extends Serializable

A Tree store.

Author:

Fabio Simeoni

Method Summary

Methods

Modifier and Type	Method and Description
org.gcube.data.streams.Stream<org.gcube.data.trees.data.Tree>	add(org.gcube.data.streams.Stream<org.gcube.data.trees.data.Tree> treeStream) Adds many trees at once to the store.
org.gcube.data.trees.data.Tree	add(org.gcube.data.trees.data.Tree doc) Adds a tree to the store.
long	cardinality() Returns the cardinality of the store.
void	delete() Deletes a store, stopping it if it has been started.
Iterator<org.gcube.data.trees.data.Tree>	get(org.gcube.data.trees.patterns.Pattern pattern) Returns all the trees in the store which match a given pattern, after pruning them with it.
org.gcube.data.trees.data.Tree	get(String id, org.gcube.data.trees.patterns.Pattern pattern) Returns a tree in the store with a given identifier, after pruning it with a given pattern.
String	id() Returns the store identifier.
File	location() Returns the location of the store.
void	start(File storageLocation) Starts the store in a given storage location,
void	stop() Stops a started store.
org.gcube.data.streams.Stream<org.gcube.data.trees.data.Tree>	update(org.gcube.data.streams.Stream<org.gcube.data.trees.data.Tree> deltaStream) Updates many trees at once in the store with the delta trees that capture their changes.
org.gcube.data.trees.data.Tree	update(org.gcube.data.trees.data.Tree delta) Updates a tree in the store with the delta tree that captures the changes.

Method Detail

id

String id()

Returns the store identifier.

Returns:

the identifier

start

void start(File storageLocation)

Starts the store in a given storage location,

Parameters:

storageLocation - the location

stop

void stop()

Stops a started store.

delete

void delete()

Deletes a store, stopping it if it has been started.

location

File location()

Returns the location of the store.

Returns:

the location

cardinality

long cardinality()

Returns the cardinality of the store.

Returns:

the cardinality

get

org.gcube.data.trees.data.Tree get(String id,
                                 org.gcube.data.trees.patterns.Pattern pattern)
                                   throws org.gcube.data.tmf.api.exceptions.UnknownTreeException,
                                          org.gcube.data.tmf.api.exceptions.InvalidTreeException,
                                          Exception

Returns a tree in the store with a given identifier, after pruning it with a given pattern.

Parameters:

id - the identifier

pattern - the pattern

Returns:

the tree

Throws:

org.gcube.data.tmf.api.exceptions.UnknownTreeException - if the store does not contain a tree with the given identifier

org.gcube.data.tmf.api.exceptions.InvalidTreeException - if the Tree with the the given identifier does not match the Pattern

Exception - if the operation fails for any other error

get

Iterator<org.gcube.data.trees.data.Tree> get(org.gcube.data.trees.patterns.Pattern pattern)
                                             throws Exception

Returns all the trees in the store which match a given pattern, after pruning them with it.

Parameters:

pattern - the pattern

Returns:

a stream of matching and pruned trees

Throws:

Exception - if the operation fails for an unexpected error

add

org.gcube.data.trees.data.Tree add(org.gcube.data.trees.data.Tree doc)
                                   throws org.gcube.data.tmf.api.exceptions.InvalidTreeException

Adds a tree to the store.

Parameters:

tree - the tree

Returns:

the input tree with any change post insertion

Throws:

org.gcube.data.tmf.api.exceptions.InvalidTreeException - if the tree does is invalid for addition (e.g. some of its nodes have already identifiers)

UnsupportedOperationException - if the store does not support this operation

Exception - if the operation fails for any other reason

add

org.gcube.data.streams.Stream<org.gcube.data.trees.data.Tree> add(org.gcube.data.streams.Stream<org.gcube.data.trees.data.Tree> treeStream)
                                                                  throws Exception

Adds many trees at once to the store.

Parameters:

treeStream - the stream of trees

Returns:

a stream of outcomes, one per tree in the input stream and in the same relative order.

Throws:

Exception - if the operation fails as a whole for an unexpected error

update

org.gcube.data.trees.data.Tree update(org.gcube.data.trees.data.Tree delta)
                                      throws org.gcube.data.tmf.api.exceptions.UnknownTreeException,
                                             org.gcube.data.tmf.api.exceptions.InvalidTreeException

Updates a tree in the store with the delta tree that captures the changes.

Parameters:

delta - the delta tree

Returns:

the updated tree

Throws:

org.gcube.data.tmf.api.exceptions.UnknownTreeException - if the delta tree does not identify a tree in the store

org.gcube.data.tmf.api.exceptions.InvalidTreeException - if the delta tree does now qualify for update

Exception - if the operation fails for any other error

update

org.gcube.data.streams.Stream<org.gcube.data.trees.data.Tree> update(org.gcube.data.streams.Stream<org.gcube.data.trees.data.Tree> deltaStream)
                                                                     throws Exception

Updates many trees at once in the store with the delta trees that capture their changes.

Parameters:

deltaStream - the delta trees

Returns:

a stream of outcomes, one per tree in the input stream and in the same relative order.

Throws:

Exception - if the operation fails as a whole for an expected error