/*
* 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.KeyValue;
import org.apache.kafka.streams.kstream.KeyValueMapper;
public class MockKeyValueMapper {
private static class NoOpKeyValueMapper<K, V> implements KeyValueMapper<K, V, KeyValue<K, V>> {
@Override
public KeyValue<K, V> apply(K key, V value) {
return KeyValue.pair(key, value);
}
}
private static class SelectValueKeyValueMapper<K, V> implements KeyValueMapper<K, V, KeyValue<V, V>> {
@Override
public KeyValue<V, V> apply(K key, V value) {
return KeyValue.pair(value, value);
}
}
private static class SelectValueMapper<K, V> implements KeyValueMapper<K, V, V> {
@Override
public V apply(K key, V value) {
return value;
}
}
private static class SelectKeyMapper<K, V> implements KeyValueMapper<K, V, K> {
@Override
public K apply(K key, V value) {
return key;
}
}
public static <K, V> KeyValueMapper<K, V, K> SelectKeyKeyValueMapper() {
return new SelectKeyMapper<>();
}
public static <K, V> KeyValueMapper<K, V, KeyValue<K, V>> NoOpKeyValueMapper() {
return new NoOpKeyValueMapper<>();
}
public static <K, V> KeyValueMapper<K, V, KeyValue<V, V>> SelectValueKeyValueMapper() {
return new SelectValueKeyValueMapper<>();
}
public static <K, V> KeyValueMapper<K, V, V> SelectValueMapper() {
return new SelectValueMapper<>();
}
}