import org.eclipse.rdf4j.model.impl.SimpleNamespace; //导入依赖的package包/类
@Override
public void initialize() throws SailException { //initialize the SAIL
    try {
    	    //get or create and get the HBase table
        table = HalyardTableUtils.getTable(config, tableName, create, splitBits);

        //Iterate over statements relating to namespaces and add them to the namespace map.
        try (CloseableIteration<? extends Statement, SailException> nsIter = getStatements(null, HALYARD.NAMESPACE_PREFIX_PROPERTY, null, true)) {
            while (nsIter.hasNext()) {
                Statement st = nsIter.next();
                if (st.getObject() instanceof Literal) {
                    String prefix = st.getObject().stringValue();
                    String name = st.getSubject().stringValue();
                    namespaces.put(prefix, new SimpleNamespace(prefix, name));
                }
            }
        }
    } catch (IOException ex) {
        throw new SailException(ex);
    }
}
 

import org.eclipse.rdf4j.model.impl.SimpleNamespace; //导入依赖的package包/类
@Override
public void setNamespace(String prefix, String name) throws SailException {
    Namespace oldNS = namespaces.put(prefix, new SimpleNamespace(prefix, name));
    ValueFactory vf = SimpleValueFactory.getInstance();
    try {
        if (oldNS != null) {
            removeStatement(null, vf.createIRI(oldNS.getName()), HALYARD.NAMESPACE_PREFIX_PROPERTY, vf.createLiteral(prefix));
        }
        addStatementInternal(vf.createIRI(name), HALYARD.NAMESPACE_PREFIX_PROPERTY, vf.createLiteral(prefix), null, getDefaultTimeStamp());
    } catch (SailException e) {
        LOG.log(Level.WARNING, "Namespace prefix could not be presisted due to an exception", e);
    }
}
 

import org.eclipse.rdf4j.model.impl.SimpleNamespace; //导入依赖的package包/类
CloseableIteration<? extends Namespace, SailException> getAll() {
    return IterUtils.toCloseableIteration(namesByPrefix.entrySet().iterator(),
            e -> new SimpleNamespace(e.getKey(), e.getValue()));
}