/**
* Returns a String representation of an ObjectNode. Object values do not have to be escaped.
*
* @param node Node
* @throws GraphException
* @return String
*/
protected String getNodeString(Node node) throws GraphException {
// value to be returned
String object = null;
// determine type of subject node and create uri from it
if (node != null) {
try {
if (node instanceof URIReference) {
object = ((URIReference) node).getURI().toString();
} else if (node instanceof BlankNode) {
object = new URI("#" + ((BlankNode) node).toString()).toString();
} else if (node instanceof Literal) {
object = ((Literal) node).getLexicalForm();
} else {
object = node.toString();
}
} catch (URISyntaxException uriException) {
throw new GraphException(
"Could not get String for ObjectNode: " + node + ".", uriException);
}
} else {
throw new GraphException(
"Could not get String for ObjectNode: " + node + ". ObjectNode is null.");
}
return object;
}
/**
* Returns a URI that represents the Node.
*
* @param node the node representing the URI.
* @throws GraphException
* @return URI
*/
protected String getURI(Node node) throws GraphException {
// value to be returned
String uri = null;
// determine type of subject node and create uri from it
if (node != null) {
try {
if (node instanceof URIReference) {
uri = ((URIReference) node).getURI().toString();
} else if (node instanceof BlankNode) {
uri = new URI("#" + ((BlankNode) node).toString()).toString();
} else {
uri = node.toString();
}
} catch (URISyntaxException uriException) {
throw new GraphException("Could not get URI for Node: " + node + ".", uriException);
}
} else {
throw new GraphException("Could not get URI for Node: " + node + ". Node is null.");
}
// return the URI with any namespaces replaced with prefixes
return this.replaceNamespace(uri);
}