org.gcube.data.tmf.api
Interface SourceReader

All Superinterfaces:

Serializable

All Known Implementing Classes:

AbstractReader

public interface SourceReader
extends Serializable

Returns trees and node from a data source.

Trees and nodes are expected to conform to the 'data type' of the source.

Author:

Fabio Simeoni

See Also:

Source.reader(), Tree, Pattern

Method Summary

org.gcube.data.streams.Stream<org.gcube.data.trees.data.Tree>	get(org.gcube.data.trees.patterns.Pattern pattern) Returns all the trees in the source which match a given pattern, after pruning them with it.
org.gcube.data.streams.Stream<org.gcube.data.trees.data.Tree>	get(org.gcube.data.streams.Stream<String> idStream, org.gcube.data.trees.patterns.Pattern pattern) Returns trees in the source with given identifiers, after pruning them with a given pattern.
org.gcube.data.trees.data.Tree	get(String id, org.gcube.data.trees.patterns.Pattern pattern) Returns a tree in the source with a given identifier, after pruning it with a given pattern.
org.gcube.data.trees.data.Node	getNode(String... path) Returns a tree node in the source from the path of identifiers which connects it to the root of the tree.
org.gcube.data.streams.Stream<org.gcube.data.trees.data.Node>	getNodes(org.gcube.data.streams.Stream<Path> pathStream) Returns tree nodes in the source from the paths of identifiers which connect them to the roots of the trees.

Method Detail

get

org.gcube.data.trees.data.Tree get(String id,
                                   org.gcube.data.trees.patterns.Pattern pattern)
                                   throws UnsupportedOperationException,
                                          UnsupportedRequestException,
                                          UnknownTreeException,
                                          InvalidTreeException,
                                          Exception

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

Parameters:

id - the identifier

pattern - the pattern

Returns:

the tree

Throws:

UnknownTreeException - if the source does not contain a tree with the given identifier

InvalidTreeException - if the Tree with the the given identifier does not match the Pattern

UnsupportedOperationException - if the data source does not support this operation

Exception - if the operation fails for any other error

UnsupportedRequestException

get

org.gcube.data.streams.Stream<org.gcube.data.trees.data.Tree> get(org.gcube.data.streams.Stream<String> idStream,
                                                                  org.gcube.data.trees.patterns.Pattern pattern)
                                                                  throws UnsupportedOperationException,
                                                                         UnsupportedRequestException,
                                                                         Exception

Returns trees in the source with given identifiers, after pruning them with a given pattern.

Parameters:

idStream - a stream of tree identifiers

pattern - the pattern

Returns:

a stream over the pruned trees, relatively ordered as their identifiers

Throws:

UnsupportedOperationException - if the data source does not support this operation

Exception - if the operation fails for an unexpected error

UnsupportedRequestException

get

org.gcube.data.streams.Stream<org.gcube.data.trees.data.Tree> get(org.gcube.data.trees.patterns.Pattern pattern)
                                                                  throws UnsupportedOperationException,
                                                                         UnsupportedRequestException,
                                                                         Exception

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

Parameters:

pattern - the pattern

Returns:

a stream of matching and pruned trees

Throws:

UnsupportedOperationException - if the data source does not support this operation

UnsupportedRequestException - if the data source does not support this request

Exception - if the operation fails for an unexpected error

getNode

org.gcube.data.trees.data.Node getNode(String... path)
                                       throws UnsupportedOperationException,
                                              UnknownPathException,
                                              UnsupportedRequestException,
                                              Exception

Returns a tree node in the source from the path of identifiers which connects it to the root of the tree.

Parameters:

path - the identifiers

Returns:

the node

Throws:

UnknownPathException - if the path does not lead to a node

UnsupportedOperationException - if the data source does not support this operation

UnsupportedRequestException - if the data source does not support this request

Exception - if the operation fails for any other error

getNodes

org.gcube.data.streams.Stream<org.gcube.data.trees.data.Node> getNodes(org.gcube.data.streams.Stream<Path> pathStream)
                                                                       throws UnsupportedOperationException,
                                                                              Exception

Returns tree nodes in the source from the paths of identifiers which connect them to the roots of the trees.

Parameters:

pathStream - a stream of paths to the nodes

Returns:

a stream of tree nodes, relatively ordered as the corresponding paths

Throws:

UnsupportedOperationException - if the data source does not support this operation

UnsupportedRequestException - if the data source does not support this request

Exception - if the operation fails for an unexpected error