org.apache.flink.table.runtime.generated.NamespaceAggsHandleFunction Maven / Gradle / Ivy

Go to download
/*
 * 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.flink.table.runtime.generated;

import org.apache.flink.table.dataformat.BaseRow;

/**
 * The base class for handling aggregate functions with namespace.
 */
public interface NamespaceAggsHandleFunction extends NamespaceAggsHandleFunctionBase {

	/**
	 * Gets the result of the aggregation from the current accumulators and
	 * namespace properties (like window start).
	 *
	 * @param namespace the namespace properties which should be calculated, such window start
	 * @return the final result (saved in a row) of the current accumulators.
	 */
	BaseRow getValue(N namespace) throws Exception;
}