public static Resource getSubject(Model r, Resource predicate, RDFNode object)
throws ModelException {
Model m = r.find(null, predicate, object);
if (m == null || m.size() == 0) return null;
// if(m.size() > 1)
// throw new RuntimeException("Model contains more than one triple");
return ((Statement) m.elements().nextElement()).subject();
}
public static RDFNode getObject(Model r, Resource subject, Resource predicate)
throws ModelException {
Model m = r.find(subject, predicate, null);
if (m == null || m.size() == 0) return null;
// if(m.size() > 1)
// throw new RuntimeException("Model contains more than one triple");
// FIXME: we do not check whether it is a resource or literal
return ((Statement) m.elements().nextElement()).object();
}
/** Collects the triples of a model into an array. */
public static Statement[] getStatementArray(Model m) throws ModelException {
Statement[] v = new Statement[m.size()];
int i = 0;
for (Enumeration en = m.elements(); en.hasMoreElements(); ) {
Statement t = (Statement) en.nextElement();
v[i++] = t;
}
return v;
}
// FIXME: use digest instead of size
static void getReachable(Resource r, Model m, Model result) throws ModelException {
int oldSize = result.size();
Model directlyReachable = m.find(r, null, null);
SetOperations.unite(result, directlyReachable);
if (result.size() == oldSize) return;
for (Enumeration en = directlyReachable.elements(); en.hasMoreElements(); ) {
Statement t = (Statement) en.nextElement();
if (t.object() instanceof Resource) getReachable((Resource) t.object(), m, result);
}
}
/** returns true if old triples from r were removed */
public static boolean setUniqueObject(
Model r, Resource subject, Resource predicate, RDFNode object) throws ModelException {
Model old = r.find(subject, predicate, null);
SetOperations.subtract(r, old);
Statement stmt = get1(old);
if (subject == null && stmt != null) subject = stmt.subject();
if (predicate == null && stmt != null) predicate = stmt.predicate();
r.add(r.getNodeFactory().createStatement(subject, predicate, object));
return !old.isEmpty();
}
/**
* @return a new model in which all occurrences of the old namespace are replaced by the new one.
* All replaced resources are summarized in the map if not null. If resourcesToIgnore != null,
* ignore resources listed there.
*/
public static Model replaceNamespace(Model m, String o, String n, Map o2n, Set resourcesToIgnore)
throws ModelException {
Model res = m.create();
NodeFactory f = m.getNodeFactory();
Enumeration en = m.elements();
while (en.hasMoreElements()) {
Statement st = (Statement) en.nextElement();
res.add(replaceNamespace(st, o, n, f, o2n, resourcesToIgnore));
}
return res;
}
public static List getObjects(Model m, Resource subject, Resource predicate)
throws ModelException {
List result = new ArrayList();
if (m == null || m.size() == 0) return result;
for (Enumeration en = m.find(subject, predicate, null).elements(); en.hasMoreElements(); ) {
Statement st = (Statement) en.nextElement();
result.add(st.object());
}
return result;
}
/** Removes all triples which have something to do with the given namespace */
public static Model removeNamespace(String ns, Model m) throws ModelException {
Model res = m.duplicate();
for (Enumeration en = m.duplicate().elements(); en.hasMoreElements(); ) {
Statement t = (Statement) en.nextElement();
if (t.subject().toString().startsWith(ns)
|| t.predicate().toString().startsWith(ns)
|| t.object().toString().startsWith(ns)) {
// System.err.println("REMOVING TRIPLE: " + t);
res.remove(t);
}
}
return res;
}
/** tries to determine the file name from getSourceURI */
public static void saveModel(Model m, RDFSerializer s)
throws FileNotFoundException, IOException, ModelException, SerializationException {
// URI to filename
URL url = null;
try {
url = new URL(m.getSourceURI());
} catch (Exception any) {
throw new ModelException("RDFUtil: cannot determine model file name: " + m.getSourceURI());
}
if ("file".equals(url.getProtocol()))
saveModel(m, url.getFile().replace('/', File.separatorChar), s);
else
throw new ModelException("RDFUtil: cannot save to non-file model URI: " + m.getSourceURI());
}
public static Set toSet(Model m) throws ModelException {
Set s = new HashSet();
Enumeration en = m.elements();
while (en.hasMoreElements()) s.add(en.nextElement());
return s;
}
/**
* Writes a table to a XML-file
*
* @param t - Output Model
* @param destination - File Destination
*/
public static void writeXML(Model t, String destination) {
try {
// Create the XML document builder, and document that will be used
DocumentBuilderFactory xmlBuilder = DocumentBuilderFactory.newInstance();
DocumentBuilder Builder = xmlBuilder.newDocumentBuilder();
Document xmldoc = Builder.newDocument();
// create Document node, and get it into the file
Element Documentnode = xmldoc.createElement("SPREADSHEET");
xmldoc.appendChild(Documentnode);
// create element nodes, and their attributes (Cells, and row/column
// data) and their content
for (int row = 1; row < t.getRows(); row++) {
for (int col = 1; col < t.getCols(col); col++) {
Element cell = xmldoc.createElement("CELL");
// set attributes
cell.setAttribute("column", Integer.toString(col));
cell.setAttribute("row", Integer.toString(col));
// set content
cell.appendChild(xmldoc.createTextNode((String) t.getContent(row, col)));
// append node to document node
Documentnode.appendChild(cell);
}
}
// Creating a datastream for the DOM tree
TransformerFactory transformerFactory = TransformerFactory.newInstance();
Transformer transformer = transformerFactory.newTransformer();
// Indentation to make the XML file look better
transformer.setOutputProperty(OutputKeys.METHOD, "xml");
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
// remove the java version
transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
DOMSource stream = new DOMSource(xmldoc);
StreamResult target = new StreamResult(new File(destination));
// write the file
transformer.transform(stream, target);
} catch (ParserConfigurationException e) {
System.out.println("Can't create the XML document builder");
} catch (TransformerConfigurationException e) {
System.out.println("Can't create transformer");
} catch (TransformerException e) {
System.out.println("Can't write to file");
}
}
public static void collectNamespaces(Model m, Collection target) throws ModelException {
for (Enumeration en = m.elements(); en.hasMoreElements(); ) {
Statement st = (Statement) en.nextElement();
collectNamespaces(st, target);
}
}
/**
* @return a new model in which all occurrences of the old resources are replaced by the new ones.
* Returns number replacements done.
*/
public static int replaceResources(Model src, Model dest, Map o2n) throws ModelException {
NodeFactory f = src.getNodeFactory();
Enumeration en = src.elements();
int replaced = 0;
while (en.hasMoreElements()) {
Statement st = (Statement) en.nextElement();
Statement st_n = replaceResources(st, f, o2n);
dest.add(st_n);
if (st_n != st) // yes, pointer comparison
replaced++;
}
return replaced;
}
/** Prints the triples of a model to the given PrintStream. */
public static void printStatements(Model m, PrintStream ps) throws ModelException {
for (Enumeration en = m.elements(); en.hasMoreElements(); ) {
Statement t = (Statement) en.nextElement();
ps.println(t); // "triple(\""+t.subject()+"\",\""+t.predicate()+"\",\""+t.object()+"\").");
}
}
/**
* Method that reads a XML-file, and returns a Model that contains the information
*
* @param file
* @return
* @return
*/
public static Model readXML(String file) {
// initialize table to be filled with content of XML file
Model t = new Model();
try {
// Create file to be parsed by document parser
File xmlfile = new File(file);
// create parser
DocumentBuilder parser = DocumentBuilderFactory.newInstance().newDocumentBuilder();
// parse the file
Document parsedfile = parser.parse(xmlfile);
// normalize the parsed file (make it more user-friendly)
parsedfile.getDocumentElement().normalize();
NodeList cells = parsedfile.getElementsByTagName("CELL");
for (int i = 0; i < cells.getLength(); i++) {
// Get cell at list index i
Node currentcell = cells.item(i);
// read the elements "location" attributes row/column
if (Node.ELEMENT_NODE == currentcell.getNodeType()) {
Element cellinfo = (Element) currentcell;
// get the row number from node attribute
int row = Integer.parseInt(cellinfo.getAttribute("row")) - 1;
// get the column number from the node attribute
int col = Integer.parseInt(cellinfo.getAttribute("column")) - 1;
// get content from node
String content = cellinfo.getTextContent();
if (content != null) {
content = content.replace("\n", "");
}
// Make the content an Integer (if it is a number), easier
// for
// using it later on
// put content in table, with row/column inserted as x/y
t.setContent(row, col, (String) content);
}
}
} catch (ParserConfigurationException e) {
System.out.println("Fileparser could not be made");
} catch (IOException f) {
System.out.println("File could not be parsed, did you enter the correct file name?");
} catch (SAXException g) {
System.out.println("Something went wrong in parsing the file");
}
return t;
}
public static void collectLiterals(Model m, Collection target) throws ModelException {
for (Enumeration en = m.elements(); en.hasMoreElements(); ) {
Statement st = (Statement) en.nextElement();
if (st.object() instanceof Literal) target.add(st.object());
}
}
public static void collectPredicates(Model m, Collection target) throws ModelException {
for (Enumeration en = m.elements(); en.hasMoreElements(); ) {
Statement st = (Statement) en.nextElement();
target.add(st.predicate());
}
}
/** Fills <tt>m</tt> with statements from <tt>s</tt> and returns it. */
public static Model toModel(Set s, Model m) throws ModelException {
Iterator it = s.iterator();
while (it.hasNext()) {
Object o = it.next();
if (o instanceof Statement) m.add((Statement) o);
}
return m;
}
public static Hashtable getNodes(Model m) throws ModelException {
Hashtable t = new Hashtable();
for (Enumeration en = m.elements(); en.hasMoreElements(); ) {
Statement s = (Statement) en.nextElement();
t.put(s.subject(), s.subject());
t.put(s.object(), s.object());
}
return t;
}
/** Collects the triples of a model in a vector. */
public static Vector getStatementVector(Model m) throws ModelException {
Vector v = new Vector();
for (Enumeration en = m.elements(); en.hasMoreElements(); ) {
Statement t = (Statement) en.nextElement();
v.addElement(t);
}
return v;
}
public static void collectResources(Model m, Collection target) throws ModelException {
for (Enumeration en = m.elements(); en.hasMoreElements(); ) {
Statement st = (Statement) en.nextElement();
if (!(st.object() instanceof Literal) && !(st.object() instanceof Statement))
target.add(st.object());
target.add(st.subject());
target.add(st.predicate());
}
}
/**
* @return a new model in which all occurrences of the old resources are replaced by the new ones.
* Returns number replacements done.
*/
public static int replaceResources(Model m, Map o2n) throws ModelException {
NodeFactory f = m.getNodeFactory();
Enumeration en = m.elements();
Model toRemove = m.create();
Model toAdd = m.create();
while (en.hasMoreElements()) {
Statement st = (Statement) en.nextElement();
Statement st_n = replaceResources(st, f, o2n);
if (st_n != st) { // yes, pointer comparison
toAdd.add(st_n);
toRemove.add(st);
}
}
SetOperations.subtract(m, toRemove);
SetOperations.unite(m, toAdd);
return toAdd.size();
}
public static void parse(String fileNameOrURL, RDFParser parser, Model model)
throws IOException, SAXException, MalformedURLException, ModelException {
URL url = new URL(normalizeURI(fileNameOrURL));
// maybe this model is loaded as schema...
// Model model = factory.registry().get(url.toString());
// if(model != null)
// return model;
// Prepare input source
model.setSourceURI(url.toString());
InputStream in = url.openStream();
InputSource source = new InputSource(in);
source.setSystemId(url.toString());
parser.parse(source, new ModelConsumer(model));
in.close();
}
public static void main(String args[]) {
if (args.length < 3) {
System.err.println("Usage: Generate model-file ( -s length | -c count length )");
System.exit(1);
}
try {
SAXParserFactory saxFactory = SAXParserFactory.newInstance();
saxFactory.setNamespaceAware(true);
SAXParser saxParser = saxFactory.newSAXParser();
XMLReader xmlReader = saxParser.getXMLReader();
XMLModelReader modelReader = new XMLModelReader(xmlReader);
FileReader modelInput = new FileReader(args[0]);
InputSource source = new InputSource(modelInput);
Model model = modelReader.load(source);
modelInput.close();
model.check();
if (args[1].equals("-s")) {
int[][] result = model.generateSequence(Integer.parseInt(args[2]));
List lexicon = model.getLexicon();
for (int i = 0; i < result[0].length; i++) {
System.out.print((Character) lexicon.get(result[0][i]));
}
System.out.println();
int numberOfStates = model.getNumberOfStates();
if (numberOfStates > 9) {
for (int i = 0; i < result[1].length; i++) {
System.out.print(result[1][i]);
System.out.print(',');
}
} else {
for (int i = 0; i < result[1].length; i++) {
System.out.print(result[1][i]);
}
}
System.out.println();
for (int i = 1; i < numberOfStates; i++) {
System.out.println(i + " = " + model.getStateName(i));
}
} else if (args[1].equals("-c")) {
List lexicon = model.getLexicon();
int count = Integer.parseInt(args[2]);
int length = Integer.parseInt(args[3]);
ListOfSequences uniqueSeqs = new ListOfSequences();
for (int i = 0; i < count; i++) {
int[][] result = model.generateSequence(length);
uniqueSeqs.addSequence(result[0]);
}
Iterator seqs = uniqueSeqs.iterator();
while (seqs.hasNext()) {
SequenceCount seq = (SequenceCount) seqs.next();
int[] key = seq.getSequence();
for (int i = 0; i < key.length; i++) {
System.out.print((Character) lexicon.get(key[i]));
}
System.out.print(',');
System.out.println(seq.getCount());
}
}
} catch (java.io.IOException ex) {
ex.printStackTrace();
} catch (org.xml.sax.SAXException ex) {
System.err.println(ex.getMessage());
} catch (javax.xml.parsers.ParserConfigurationException ex) {
ex.printStackTrace();
}
}
/** Creates a new unique unnamed resource. */
public static Resource noname(Model m) throws ModelException {
return m.getNodeFactory().createUniqueResource();
}
public static void add(Model m, Resource subject, Resource predicate, RDFNode object)
throws ModelException {
m.add(m.getNodeFactory().createStatement(subject, predicate, object));
}
/** Returns the first triple of the model */
public static Statement get1(Model m) throws ModelException {
if (m == null || m.isEmpty()) return null;
// if(m.size() > 1)
// throw new RuntimeException("Model contains more than one triple");
return (Statement) m.elements().nextElement();
}
public static boolean isInstanceOf(Model r, Resource i, Resource cls) throws ModelException {
return !r.find(i, RDF.type, cls).isEmpty();
}
/**
* returns a subgraph of "m" containing "r" and all nodes reachable from "r" via directed edges.
* These edges are also included in the resulting model.
*/
public static Model getReachable(Resource r, Model m) throws ModelException {
Model result = m.create();
getReachable(r, m, result);
return result;
}