Examples with RyaTripleContext org.apache.rya.api.resolver.RyaTripleContext used on opensource projects

Example 1 with RyaTripleContext

use of org.apache.rya.api.resolver.RyaTripleContext in project incubator-rya by apache.

the class AccumuloRyaStatementStore method fetchStatements.

@Override
public Iterator<RyaStatement> fetchStatements() throws FetchStatementException {
    try {
        final RyaTripleContext ryaTripleContext = RyaTripleContext.getInstance(accumuloRyaDao.getConf());
        Scanner scanner = null;
        try {
            scanner = AccumuloRyaUtils.getScanner(tablePrefix + RdfCloudTripleStoreConstants.TBL_SPO_SUFFIX, accumuloRyaDao.getConf());
            for (final IteratorSetting iteratorSetting : iteratorSettings) {
                scanner.addScanIterator(iteratorSetting);
            }
        } catch (final IOException e) {
            throw new FetchStatementException("Unable to get scanner to fetch Rya Statements", e);
        }
        // Convert Entry iterator to RyaStatement iterator
        final Iterator<Entry<Key, Value>> entryIter = scanner.iterator();
        final Iterator<RyaStatement> ryaStatementIter = Iterators.transform(entryIter, new Function<Entry<Key, Value>, RyaStatement>() {

            @Override
            public RyaStatement apply(final Entry<Key, Value> entry) {
                final Key key = entry.getKey();
                final Value value = entry.getValue();
                RyaStatement ryaStatement = null;
                try {
                    ryaStatement = AccumuloRyaUtils.createRyaStatement(key, value, ryaTripleContext);
                } catch (final TripleRowResolverException e) {
                    log.error("Unable to convert the key/value pair into a Rya Statement", e);
                }
                return ryaStatement;
            }
        });
        return ryaStatementIter;
    } catch (final Exception e) {
        throw new FetchStatementException("Failed to fetch statements.", e);
    }
}

Example 2 with RyaTripleContext

use of org.apache.rya.api.resolver.RyaTripleContext in project incubator-rya by apache.

the class MRReasoningUtils method getStatement.

/**
 * Convert an Accumulo row to a RyaStatement.
 */
static RyaStatement getStatement(Key row, Value data, Configuration conf) {
    try {
        RyaTripleContext ryaContext = RyaTripleContext.getInstance(new AccumuloRdfConfiguration(conf));
        RyaStatement ryaStatement = ryaContext.deserializeTriple(RdfCloudTripleStoreConstants.TABLE_LAYOUT.SPO, new TripleRow(row.getRow().getBytes(), row.getColumnFamily().getBytes(), row.getColumnQualifier().getBytes(), row.getTimestamp(), row.getColumnVisibility().getBytes(), data.get()));
        return ryaStatement;
    } catch (TripleRowResolverException e) {
        e.printStackTrace();
        System.err.println("row: " + row);
        return null;
    } catch (IllegalArgumentException e) {
        e.printStackTrace();
        System.err.println("row: " + row);
        throw e;
    }
}