/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.cassandra.db.rows;
import java.util.Iterator;
import org.apache.cassandra.config.CFMetaData;
import org.apache.cassandra.db.*;
/**
* An iterator over rows belonging to a partition.
*
* A RowIterator is an UnfilteredRowIterator to which any deletion information has been
* filtered out. As such, all cell of all rows returned by this iterator are,
* by definition, live, and hence code using a RowIterator don't have to worry
* about tombstones and other deletion information.
*
* Note that as for UnfilteredRowIterator, the rows returned must be in clustering order (or
* reverse clustering order if isReverseOrder is true), and the Row objects returned
* by next() are only valid until the next call to hasNext() or next().
*/
public interface RowIterator extends BaseRowIterator<Row>
{
/**
* Returns whether the provided iterator has no data.
*/
public default boolean isEmpty()
{
return staticRow().isEmpty() && !hasNext();
}
}