/*
* 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.kafka.test;
import org.apache.kafka.streams.kstream.Aggregator;
public class MockAggregator {
public final static Aggregator<Object, Object, String> TOSTRING_ADDER = toStringInstance("+");
public final static Aggregator<Object, Object, String> TOSTRING_REMOVER = toStringInstance("-");
public static <K, V> Aggregator<K, V, String> toStringInstance(final String sep) {
return new Aggregator<K, V, String>() {
@Override
public String apply(K aggKey, V value, String aggregate) {
return aggregate + sep + value;
}
};
}
}