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/*
 * 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
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package org.apache.kafka.streams.kstream;


/**
 * The result key type of a windowed stream aggregation.
 * 

* If a {@link KStream} gets grouped and aggregated using a window-aggregation the resulting {@link KTable} is a * so-called "windowed {@link KTable}" with a combined key type that encodes the corresponding aggregation window and * the original record key. * Thus, a windowed {@link KTable} has type {@code ,V>}. * * @param type of the key * @see KGroupedStream#windowedBy(Windows) * @see KGroupedStream#windowedBy(SessionWindows) */ public class Windowed { private final K key; private final Window window; public Windowed(final K key, final Window window) { this.key = key; this.window = window; } /** * Return the key of the window. * * @return the key of the window */ public K key() { return key; } /** * Return the window containing the values associated with this key. * * @return the window containing the values */ public Window window() { return window; } @Override public String toString() { return "[" + key + "@" + window.start() + "/" + window.end() + "]"; } @Override public boolean equals(final Object obj) { if (obj == this) { return true; } if (!(obj instanceof Windowed)) { return false; } final Windowed that = (Windowed) obj; return window.equals(that.window) && key.equals(that.key); } @Override public int hashCode() { final long n = ((long) window.hashCode() << 32) | key.hashCode(); return (int) (n % 0xFFFFFFFFL); } }





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