| /** |
| * 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.streams.kstream; |
| |
| import org.apache.kafka.streams.kstream.internals.UnlimitedWindow; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| /** |
| * The unlimited window specifications. |
| */ |
| public class UnlimitedWindows extends Windows<UnlimitedWindow> { |
| |
| private static final long DEFAULT_START_TIMESTAMP = 0L; |
| |
| /** The start timestamp of the window. */ |
| public final long start; |
| |
| private UnlimitedWindows(String name, long start) { |
| super(name); |
| |
| if (start < 0) { |
| throw new IllegalArgumentException("start must be > 0 (you provided " + start + ")"); |
| } |
| this.start = start; |
| } |
| |
| /** |
| * Return an unlimited window starting at timestamp zero. |
| */ |
| public static UnlimitedWindows of(String name) { |
| return new UnlimitedWindows(name, DEFAULT_START_TIMESTAMP); |
| } |
| |
| /** |
| * Return a new unlimited window for the specified start timestamp. |
| * |
| * @param start the window start time |
| * @return a new unlimited window that starts at {@code start} |
| */ |
| public UnlimitedWindows startOn(long start) { |
| return new UnlimitedWindows(this.name, start); |
| } |
| |
| @Override |
| public Map<Long, UnlimitedWindow> windowsFor(long timestamp) { |
| // always return the single unlimited window |
| |
| // we cannot use Collections.singleMap since it does not support remove() |
| Map<Long, UnlimitedWindow> windows = new HashMap<>(); |
| if (timestamp >= start) { |
| windows.put(start, new UnlimitedWindow(start)); |
| } |
| return windows; |
| } |
| |
| @Override |
| public final boolean equals(Object o) { |
| if (o == this) { |
| return true; |
| } |
| |
| if (!(o instanceof UnlimitedWindows)) { |
| return false; |
| } |
| |
| UnlimitedWindows other = (UnlimitedWindows) o; |
| return this.start == other.start; |
| } |
| |
| @Override |
| public int hashCode() { |
| return (int) (start ^ (start >>> 32)); |
| } |
| |
| } |