How to use org.apache.ignite.cache.query

/**
 * Make a copy of {@link SqlFieldsQuery} with all flags and preserving type.
 * @param oldQry Query to copy.
 * @return Query copy.
 */
private SqlFieldsQuery cloneFieldsQuery(SqlFieldsQuery oldQry) {
  return oldQry.copy().setLocal(oldQry.isLocal()).setPageSize(oldQry.getPageSize());
}

/** {@inheritDoc} */
@Override public SqlFieldsQueryEx setArgs(Object... args) {
  super.setArgs(args);
  return this;
}

/** {@inheritDoc} */
@Override public SqlFieldsQueryEx setDistributedJoins(boolean distributedJoins) {
  super.setDistributedJoins(distributedJoins);
  return this;
}

  @Override public boolean apply() {
    return cache.query(new SqlQuery<Integer, Integer>(Integer.class, "1=1")).getAll().size() == 5 &&
      cache.query(new SqlFieldsQuery("select _key, _val from Integer")).getAll().size() == 5;
  }
}, 5000);

/**
 * Default query.
 *
 * @param arg Argument.
 * @return Query.
 */
private static SqlFieldsQuery query(long arg) {
  return new SqlFieldsQuery("SELECT id, name FROM Person WHERE id >= ?").setArgs(arg);
}

/**
 * @return Copy of this query.
 */
public SqlFieldsQuery copy() {
  return new SqlFieldsQuery(this);
}

  @Override public Object call() throws Exception {
    try {
      cur1.getAll();
    }
    catch (CacheException e) {
      checkAndWait(e);
      return true;
    }
    return false;
  }
});

  /**
   * Gets the iterator.
   *
   * @return Iterator.
   */
  private Iterator<T> iterator() {
    if (iterator == null)
      iterator = cursor.iterator();

    return iterator;
  }
}

/** {@inheritDoc} */
@Override public SqlFieldsQueryEx setPageSize(int pageSize) {
  super.setPageSize(pageSize);
  return this;
}

/** {@inheritDoc} */
@Override public SqlFieldsQueryEx setTimeout(int timeout, TimeUnit timeUnit) {
  super.setTimeout(timeout, timeUnit);
  return this;
}

/**
 * Ctor.
 *
 * @param cursor   Cursor.
 * @param pageSize Page size.
 * @param ctx      Context.
 */
ClientCacheFieldsQueryCursor(FieldsQueryCursor<List> cursor, int pageSize, ClientConnectionContext ctx) {
  super(cursor, pageSize, ctx);
  columnCount = cursor.getColumnsCount();
}

/** {@inheritDoc} */
@Override public SqlFieldsQueryEx setSql(String sql) {
  super.setSql(sql);
  return this;
}

  @Override public Object call() throws Exception {
    q.setPageSize(0);
    return null;
  }
}, IllegalArgumentException.class, null

  @Override public Object call() throws Exception {
    q.setTimeInterval(-1);
    return null;
  }
},

/**
 * Constructs query for the given search string.
 *
 * @param type Type.
 * @param txt Search string.
 */
public TextQuery(Class<?> type, String txt) {
  setType(type);
  setText(txt);
}

/**
 * Close all cursors.
 */
public void closeAll() {
  for (FieldsQueryCursor<List<?>> cursor : cursors)
    cursor.close();
}

/**
 * Creates new continuous query with transformer.
 */
public ContinuousQueryWithTransformer() {
  setPageSize(DFLT_PAGE_SIZE);
}

  /** */
  private static SqlFieldsQuery q(String sql) {
    return new SqlFieldsQuery(sql);
  }
}

/**
 * @return Result set iterator.
 */
public synchronized Iterator getIterator() {
  assert cur != null;
  if (itr == null)
    itr = cur.iterator();
  return itr;
}

/**
 * Constructs query for the given search string.
 *
 * @param type Type.
 * @param txt Search string.
 */
public TextQuery(String type, String txt) {
  setType(type);
  setText(txt);
}