de.uni_koblenz.aggrimm.icp.crypto.sign.graph

Class GraphCollection

java.lang.Object

de.uni_koblenz.aggrimm.icp.crypto.sign.graph.GraphCollection

public class GraphCollection
extends Object

A graph collection (class 'GraphCollection') is a set of named graphs (Vector). It may also contain a set of prefixes (Vector). Prefixes can be resolved by calling 'resolvePrefixes()' and re-applied by calling 'applyPrefixes()'. There can be two special graph ('NamedGraph') types in a graph collection: - name = "", depth = X: unnamed/default graph for triples which are in graphs without a name, can be at any nesting depth - name = "", depth = -1: virtual graph as container for all triples which are not in any graph at all ('root triples')

Author:

Peter Schauß

Constructor Summary

Constructors

Constructor and Description
GraphCollection()

Method Summary

Modifier and Type	Method and Description
void	addGraph(NamedGraph g) Adds a graph to the GraphCollection
void	addPrefix(Prefix p) Adds a prefix to the GraphCollection
void	applyPrefixes() Applies all prefixes of the GraphCollection
int	blankNodeCount(boolean recursive, boolean distinct) Deprecated.
void	clear() Clears the graph collection by removing all contained graphs
int	countDuplicates() Counts duplicate triples in the GraphCollection Attentions: Only cares about triples (MSGs are ignored) and sorts all triples!
int	countPredicate(String predicate) Counts triples with specified predicate in the GraphCollection
LinkedList<NamedGraph>	getGraphs()
LinkedList<Prefix>	getPrefixes()
ArrayList<Triple>	getRootTriples() Get all triples at the root level (outside any graph) of the GraphCollection
SignatureData	getSignature()
int[]	getStats() Gets statistics of the GraphCollection Array index - value 0 - total triple count 1 - IRIs / resources 2 - literals 3 - blank nodes 4 - distinct blank nodes 5 - Unique subject URIs
boolean	hasSignature()
boolean	hasTriples() Check if the GraphCollection has any triples
boolean	isHashed() Checks if GraphCollection has been hashed
boolean	isUsingMSGs() Checks if there are any MSGs in the GraphCollection
boolean	isValid() Checks if the graph collection and all it's content is well-formed
void	resolvePrefixes() Resolves all prefixes of the GraphCollection
void	setGraphs(LinkedList<NamedGraph> graphs)
void	setSignature(SignatureData signature)
void	sortGraphs() Sorts all graphs in the GraphCollection
String	toString() Converts the GraphCollection to a string (used for printing and debugging) Attention: May not work properly with very big graphs
int	tripleCount() Gets the triple count of the GraphCollection
void	updateDepths() Updates the depths of all contained graphs

Methods inherited from class java.lang.Object

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

Constructor Detail

GraphCollection

public GraphCollection()

Method Detail

getPrefixes

public LinkedList<Prefix> getPrefixes()

getGraphs

public LinkedList<NamedGraph> getGraphs()

setGraphs

public void setGraphs(LinkedList<NamedGraph> graphs)

getSignature

public SignatureData getSignature()

setSignature

public void setSignature(SignatureData signature)

hasSignature

public boolean hasSignature()

addPrefix

public void addPrefix(Prefix p)

Adds a prefix to the GraphCollection

Parameters:

p - Prefix to add

addGraph

public void addGraph(NamedGraph g)

Adds a graph to the GraphCollection

Parameters:

g - NamedGraph to add

hasTriples

public boolean hasTriples()

Check if the GraphCollection has any triples

Returns:

true if there are any triples, false otherwise

tripleCount

public int tripleCount()

Gets the triple count of the GraphCollection

Returns:

number of triples in the GraphCollection

getRootTriples

public ArrayList<Triple> getRootTriples()

Get all triples at the root level (outside any graph) of the GraphCollection

Returns:

vector of triples at root level

blankNodeCount

@Deprecated
public int blankNodeCount(boolean recursive,
                                      boolean distinct)

Deprecated.

Gets the blank node count of the GraphCollection

Parameters:

recursive - count recursively in all sub graphs?

distinct - count distinct blank nodes only?

Returns:

blank node count

getStats

public int[] getStats()

Gets statistics of the GraphCollection Array index - value 0 - total triple count 1 - IRIs / resources 2 - literals 3 - blank nodes 4 - distinct blank nodes 5 - Unique subject URIs

Returns:

array with statistics

countPredicate

public int countPredicate(String predicate)

Counts triples with specified predicate in the GraphCollection

Parameters:

predicate - URI of the predicate

Returns:

number of occurrences

countDuplicates

public int countDuplicates()

Counts duplicate triples in the GraphCollection Attentions: Only cares about triples (MSGs are ignored) and sorts all triples!

Returns:

number of duplicates

resolvePrefixes

public void resolvePrefixes()

Resolves all prefixes of the GraphCollection

applyPrefixes

public void applyPrefixes()

Applies all prefixes of the GraphCollection

sortGraphs

public void sortGraphs()

Sorts all graphs in the GraphCollection

isHashed

public boolean isHashed()

Checks if GraphCollection has been hashed

Returns:

true if it has been hashed, false otherwise

isUsingMSGs

public boolean isUsingMSGs()

Checks if there are any MSGs in the GraphCollection

Returns:

true if there are MSGs, false otherwise

isValid

public boolean isValid()
                throws Exception

Checks if the graph collection and all it's content is well-formed

Returns:

true if its well-formed

Throws:

Exception - if its malformed

clear

public void clear()

Clears the graph collection by removing all contained graphs

updateDepths

public void updateDepths()

Updates the depths of all contained graphs

toString

public String toString()

Converts the GraphCollection to a string (used for printing and debugging) Attention: May not work properly with very big graphs

Overrides:

toString in class Object

Returns:

string representation