sk.uniba.euromath.gene.exportgraph
Class GraphNode

java.lang.Object
  sk.uniba.euromath.gene.exportgraph.GraphNode

public final class GraphNode
extends Object

Represents a single node in the exporter graph. The path may be extended by attaching nodes, however node compatibility must be kept. Equal only to itself.

Author:

Martin Vysny

Field Summary

ExporterInfo	info Exporter that this node represents.
String	targetNamespace If info is null then this represents a namespace of the source document fragment.

Method Summary

void	attachNode(GraphNode node) Attaches given node to the followers of this node (creates an edge oriented from this node to given node).
static void	checkCompatibility(GraphNode prev, GraphNode next) Checks compatibility of these two nodes.
static void	checkCompatibility(Set<String> ns, EnumSet<ResultEnum> nsTypes, GraphNode next) Checks compatibility of a node.
boolean	equals(Object obj)
Set<String>	getResultNamespaces() Returns all namespaces for which a child node is registered.
EnumSet<ResultEnum>	getResultTypes() Returns supported result types.
Set<String>	getTargets() Returns all namespaces that this node can produce.
List<GraphNode>	getTargets(String namespaceUri) Returns an unmodifiable list of nodes that may process given namespace.
boolean	hasFollowers() Checks if this node has at least one follower node.
int	hashCode()
boolean	isAscendantOf(GraphNode other) Checks if there is a follower path from this node to the other node.
boolean	isSourceNode() Checks if this graph node is a source node (intended to read data directly from the document).
static GraphNode	newExporterNode(ExporterInfo info) Returns node that represents an exporter.
static GraphNode	newSourceNode(String namespace) Returns node that represents a document source.
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

info

public final ExporterInfo info

Exporter that this node represents. null if the node represents a source document fragment.

targetNamespace

public final String targetNamespace

If info is null then this represents a namespace of the source document fragment.

Method Detail

newExporterNode

public static GraphNode newExporterNode(ExporterInfo info)

Returns node that represents an exporter.

Parameters:

info - exporter info

Returns:

node instance.

newSourceNode

public static GraphNode newSourceNode(String namespace)

Returns node that represents a document source.

Parameters:

namespace - namespace of the document fragment.

Returns:

node instance.

attachNode

public void attachNode(GraphNode node)

Attaches given node to the followers of this node (creates an edge oriented from this node to given node). Node must be compatible with this node.

Parameters:

node - node to attach.

checkCompatibility

public static void checkCompatibility(Set<String> ns,
                                      EnumSet<ResultEnum> nsTypes,
                                      GraphNode next)

Checks compatibility of a node. next must accept at least one namespace ns and next's source must be compatible with nsTypes.

Parameters:

ns - namespaces produced by previous node.

nsTypes - all kinds of output that previous node is able to produce.

next - a node that'll be linked to the previous node.

checkCompatibility

public static void checkCompatibility(GraphNode prev,
                                      GraphNode next)

Checks compatibility of these two nodes. next must accept namespace produced by prev, and next's source must be compatible with prev's source.

Parameters:

prev - previous node

next - a node that'll be linked to the previous node.

toString

public String toString()

Overrides:

toString in class Object

getTargets

public List<GraphNode> getTargets(String namespaceUri)

Returns an unmodifiable list of nodes that may process given namespace.

Parameters:

namespaceUri - the result namespace of this node.

Returns:

list of nodes that may process given namespace, or null if no nodes were registered.

getResultNamespaces

public Set<String> getResultNamespaces()

Returns all namespaces for which a child node is registered.

Returns:

set of namespace URIs.

getTargets

public Set<String> getTargets()

Returns all namespaces that this node can produce.

Returns:

Returns info.targets (or targetNamespace if info is null)

getResultTypes

public EnumSet<ResultEnum> getResultTypes()

Returns supported result types.

Returns:

info.resultTypes or ResultEnum.DOM if info is null.

equals

public final boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public final int hashCode()

Overrides:

hashCode in class Object

isSourceNode

public final boolean isSourceNode()

Checks if this graph node is a source node (intended to read data directly from the document).

Returns:

true if this is source node.

hasFollowers

public final boolean hasFollowers()

Checks if this node has at least one follower node.

Returns:

true if getResultNamespaces() returns a non-empty collection.

isAscendantOf

public final boolean isAscendantOf(GraphNode other)

Checks if there is a follower path from this node to the other node.

Parameters:

other - the possible descendant of this node.

Returns:

true if other node is descendant of this node.