/*
* 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.drill.exec.vector.accessor;
/**
* Writer for values into an array. Array writes are write-once,
* sequential: each call to a <tt>setFoo()</tt> method writes a
* value and advances the array index.
* <p>
* {@see ArrayReader}
*/
public interface ArrayWriter extends ColumnAccessor, ScalarWriter {
int size();
/**
* Determine if the next position is valid for writing. Will be invalid
* if the writer hits a size or other limit.
*
* @return true if another item is available and the reader is positioned
* at that item, false if no more items are available and the reader
* is no longer valid
*/
boolean valid();
}