Package org.apache.hadoop.hbase.hbql.mapping

Examples of org.apache.hadoop.hbase.hbql.mapping.ResultAccessor

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    @SuppressWarnings("unchecked")
    protected T fetchNextObject() throws HBqlException {

        final HResultSetImpl<T, R> rs = this.getResultSet();
        final SelectStatement selectStatement = rs.getSelectStmt();
        final ResultAccessor resultAccessor = selectStatement.getMappingContext().getResultAccessor();

        while (this.getCurrentResultIterator() != null || moreResultsPending()) {

            if (this.getCurrentResultIterator() == null)
                this.setCurrentResultIterator(this.getNextResultIterator());

            while (this.getCurrentResultIterator() != null
                   && this.getCurrentResultIterator().hasNext()) {

                final Result result = this.getCurrentResultIterator().next();

                try {
                    if (rs.getClientExpressionTree() != null
                        && !rs.getClientExpressionTree().evaluate(rs.getHConnectionImpl(), result))
                        continue;
                }
                catch (ResultMissingColumnException e) {
                    continue;
                }
                catch (NullColumnValueException e) {
                    continue;
                }

                this.incrementReturnedRecordCount();

                if (selectStatement.isAnAggregateQuery()) {
                    this.getResultSet().getAggregateRecord().applyValues(result);
                }
                else {
                    final T val = (T)resultAccessor.newObject(rs.getHConnectionImpl(),
                                                              selectStatement.getMappingContext(),
                                                              selectStatement.getSelectElementList(),
                                                              rs.getMaxVersions(),
                                                              result);
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                }

                @SuppressWarnings("unchecked")
                protected T fetchNextObject() throws HBqlException {

                    final ResultAccessor resultAccessor = getMappingContext().getResultAccessor();

                    // Read data until all jobs have sent DONE tokens
                    while (true) {
                        final Result result;
                        final CompletionQueue.Element<Result> element = getCompletionQueueExecutor().takeElement();
                        if (element.isCompletionToken()) {
                            if (!moreResultsPending())
                                break;
                            else
                                continue;
                        }
                        else {
                            result = element.getValue();
                        }

                        this.incrementReturnedRecordCount();

                        if (getSelectStmt().isAnAggregateQuery()) {
                            getAggregateRecord().applyValues(result);
                        }
                        else {
                            final T val = (T)resultAccessor.newObject(getHConnectionImpl(),
                                                                      getMappingContext(),
                                                                      getSelectStmt().getSelectElementList(),
                                                                      getMaxVersions(),
                                                                      result);
                            return getQuery().callOnEachRow(val);
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    public static <E> Query<E> newQuery(final HConnectionImpl conn,
                                        final SelectStatement selectStatement,
                                        final Class clazz,
                                        final QueryListener<E>... listeners) throws HBqlException {
        final ResultAccessor accessor;
        if (clazz.equals(HRecord.class)) {
            accessor = new HRecordResultAccessor(selectStatement.getMappingContext());
        }
        else {
            accessor = conn.getAnnotationMapping(clazz);
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Related Classes of org.apache.hadoop.hbase.hbql.mapping.ResultAccessor

  • org.apache.hadoop.hbase.hbql.impl.Query
  • org.apache.hadoop.hbase.hbql.impl.ResultExecutorResultSet
  • org.apache.hadoop.hbase.hbql.impl.ResultSetIterator
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