Package edu.cornell.mannlib.vitro.webapp.edit.n3editing.VTwo

Class RdfLiteralHash

java.lang.Object

edu.cornell.mannlib.vitro.webapp.edit.n3editing.VTwo.RdfLiteralHash

public class RdfLiteralHash
extends Object

Set of static methods to create hashes for RDF literal statements so they can be referenced in HTTP parameters. This allows the creation of a URL to request the deletion of a RDF literal statement without including the whole literal in the parameters. ex. http://fake.com/delete?sub="http://bob"&pred="http://hasNickName"&stmtHash="23443434" This could request the deletion of a the statement for Bob's nickname where the literal matched the hash 23443434. The hash is for the whole statement, not just the literal part. The has will only match if the subject, predicate, datetype/language and literal match.

Constructor Summary

Constructors

Constructor	Description
RdfLiteralHash()

Method Summary

Modifier and Type	Method	Description
static boolean	doesStmtMatchHash(DataPropertyStatement stmt, int hash)
static DataPropertyStatement	getPropertyStmtByHash(String subjectUri, String predicateUri, int hash, org.apache.jena.rdf.model.Model model)	Forward to either getDataPropertyStmtByHash or getRdfsLabelStatementByHash, depending on the property.
static int	makeRdfLiteralHash(DataPropertyStatement stmt)	Make a hash based on individual, property, literal and (lang or datatype).
static int	makeRdfsLabelLiteralHash(Individual subject, String value, org.apache.jena.rdf.model.Model model)

Methods inherited from class java.lang.Object

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

Constructor Detail

RdfLiteralHash

public RdfLiteralHash()

Method Detail

makeRdfLiteralHash

public static int makeRdfLiteralHash(DataPropertyStatement stmt)

Make a hash based on individual, property, literal and (lang or datatype).

Parameters:

stmt - Data statement

Returns:

a value between MIN_INTEGER and MAX_INTEGER

doesStmtMatchHash

public static boolean doesStmtMatchHash(DataPropertyStatement stmt,
                                        int hash)

Parameters:

stmt - Data statement

hash - Hash

getPropertyStmtByHash

public static DataPropertyStatement getPropertyStmtByHash(String subjectUri,
                                                          String predicateUri,
                                                          int hash,
                                                          org.apache.jena.rdf.model.Model model)

Forward to either getDataPropertyStmtByHash or getRdfsLabelStatementByHash, depending on the property.

Parameters:

subjectUri - Subject URI

predicateUri - Predicate URI

hash - Hash

model - , may not be null

Returns:

a DataPropertyStatement if found or null if not found

makeRdfsLabelLiteralHash

public static int makeRdfsLabelLiteralHash(Individual subject,
                                           String value,
                                           org.apache.jena.rdf.model.Model model)