/**
* Returns the normalized Authority value for an author based on the name passed in. If no
* authority exists, null will be returned.
*
* @param author the author to get the authority information for
* @return the normalized authority information or null if no authority exists.
*/
public static String getNormalizedAuthorAuthorityFromDatabase(String author) {
if (!connectToDatabase()) {
return null;
} else {
try {
getPreferredAuthorByOriginalNameStmt.setString(1, author);
// First check without normalization
ResultSet originalNameResults = getPreferredAuthorByOriginalNameStmt.executeQuery();
if (originalNameResults.next()) {
String authority = originalNameResults.getString("normalizedName");
// Found a match
originalNameResults.close();
return authority;
} else {
// No match, check alternate names for the author
String normalizedAuthor = AuthorNormalizer.getNormalizedName(author);
getPreferredAuthorByAlternateNameStmt.setString(1, normalizedAuthor);
ResultSet alternateNameResults = getPreferredAuthorByAlternateNameStmt.executeQuery();
if (alternateNameResults.next()) {
String authority = alternateNameResults.getString("normalizedName");
alternateNameResults.close();
return authority;
}
}
} catch (Exception e) {
logger.error("Error loading authority information from database", e);
}
}
return null;
}
public static void loadAuthoritiesFromVIAF() {
if (!connectToDatabase()) {
return;
}
try {
PreparedStatement addPreferredAuthorStmt =
authoritiesConn.prepareStatement(
"INSERT INTO preferred_authors (viafId, originalName, normalizedName, wikipediaLink) VALUES (?, ?, ?, ?) ON DUPLICATE KEY UPDATE originalName = VALUES(originalName), normalizedName = VALUES(normalizedName), wikipediaLink = VALUES(wikipediaLink)");
PreparedStatement addAlternateAuthorStmt =
authoritiesConn.prepareStatement(
"INSERT IGNORE alternate_authors (viafId, alternateName) VALUES (?, ?)");
File viafFile = new File("d:/data/vufind-plus/viaf/viaf-20150115-clusters-rdf.xml");
// Read data from the file one line at a time since the whole thing is HUGE
try {
BufferedReader reader = new BufferedReader(new FileReader(viafFile));
// Setup the XML processor
DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
XPath xpath = XPathFactory.newInstance().newXPath();
XPathExpression viafIdExpression = xpath.compile("RDF/Description");
XPathExpression conceptsExpression = xpath.compile("RDF/Concept");
String curLine = reader.readLine();
while (curLine != null) {
if (!curLine.startsWith("<")) {
curLine = curLine.substring(curLine.indexOf('<'));
}
// Get XMl for the line
Document doc = dBuilder.parse(new InputSource(new StringReader(curLine)));
// Load VIAF ID, Preferred authority, and alternate labels, also wikipedia article?
Element viafIdNode = (Element) viafIdExpression.evaluate(doc, XPathConstants.NODE);
String viafIdStr = viafIdNode.getAttribute("rdf:about");
viafIdStr = viafIdStr.replace("http://viaf.org/viaf/", "");
Long viafId = Long.parseLong(viafIdStr);
NodeList concepts = (NodeList) conceptsExpression.evaluate(doc, XPathConstants.NODESET);
HashSet<String> altLabels = new HashSet<String>();
String preferredLabel = null;
String wikipediaLink = null;
// Scan through the concepts to get the Library of Congress Concept
for (int i = 0; i < concepts.getLength(); i++) {
Node curConcept = concepts.item(i);
boolean isPreferredConcept = false;
String preferredConceptLabel = null;
HashSet<String> altLabelsForConcept = new HashSet<String>();
// Get the scheme for the concept
NodeList conceptInfoNodes = curConcept.getChildNodes();
for (int j = 0; j < conceptInfoNodes.getLength(); j++) {
Element conceptInfoNode = (Element) conceptInfoNodes.item(j);
if (conceptInfoNode.getTagName().equals("skos:inScheme")) {
String schemeName = conceptInfoNode.getAttribute("rdf:resource");
if (schemeName.equals("http://viaf.org/authorityScheme/LC")) {
isPreferredConcept = true;
}
} else if (conceptInfoNode.getTagName().equals("skos:prefLabel")) {
preferredConceptLabel = conceptInfoNode.getTextContent();
} else if (conceptInfoNode.getTagName().equals("skos:altLabel")) {
altLabelsForConcept.add(conceptInfoNode.getTextContent());
} else if (conceptInfoNode.getTagName().equals("foaf:isPrimaryTopicOf")) {
if (conceptInfoNode.hasAttribute("rdf:resource")
&& conceptInfoNode
.getAttribute("rdf:resource")
.startsWith("http://en.wikipedia.org")) {
wikipediaLink = conceptInfoNode.getAttribute("rdf:resource");
}
}
}
if (isPreferredConcept) {
preferredLabel = preferredConceptLabel;
altLabels = altLabelsForConcept;
break;
}
}
if (preferredLabel != null) {
String normalizedName = AuthorNormalizer.getNormalizedName(preferredLabel);
if (normalizedName.length() > 50) {
logger.warn("Normalized author longer than 50 characters " + normalizedName);
normalizedName = normalizedName.substring(0, 50);
}
if (preferredLabel.length() > 200) {
logger.warn("Author longer than 200 characters " + preferredLabel);
preferredLabel = preferredLabel.substring(0, 200);
}
addPreferredAuthorStmt.setLong(1, viafId);
addPreferredAuthorStmt.setString(2, preferredLabel);
addPreferredAuthorStmt.setString(3, normalizedName);
addPreferredAuthorStmt.setString(4, wikipediaLink);
addPreferredAuthorStmt.executeUpdate();
// To make lookups faster, we will want to put alternate labels as first name last name
// in addition to
// last name, first name
for (String curAltName : altLabels) {
// Add the normalized author name for improved performance doing lookups
String normalizedAltAuthor = AuthorNormalizer.getNormalizedName(curAltName);
if (normalizedAltAuthor.length() > 200) {
logger.warn(
"Normalized alternate author longer than 200 characters " + preferredLabel);
normalizedAltAuthor = normalizedAltAuthor.substring(0, 200);
}
addAlternateAuthorStmt.setLong(1, viafId);
addAlternateAuthorStmt.setString(2, normalizedAltAuthor);
addAlternateAuthorStmt.executeUpdate();
// See if we need to reverse the author name to first name / last name
String reversedName = AuthorNormalizer.getDisplayName(curAltName);
if (reversedName != null) {
String normalizedReversedName = AuthorNormalizer.getNormalizedName(reversedName);
if (normalizedReversedName.length() > 200) {
logger.warn(
"Normalized reversed alternate author longer than 200 characters "
+ preferredLabel);
normalizedReversedName = normalizedReversedName.substring(0, 200);
}
addAlternateAuthorStmt.setLong(1, viafId);
addAlternateAuthorStmt.setString(2, normalizedReversedName);
addAlternateAuthorStmt.executeUpdate();
}
}
// TODO: optionally load related works from see also?
} else {
// logger.warn("No preferred Label found for cluster " + viafIdStr);
}
// Get the next line
curLine = reader.readLine();
}
} catch (Exception e) {
logger.error("Error loading authorities from VIAF", e);
}
} catch (SQLException e) {
logger.error("Unable to connect to database", e);
}
if (authoritiesConn != null) {
return;
}
}
