| /* |
| * 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.beam.runners.flink.translation.functions; |
| |
| import org.apache.beam.sdk.transforms.windowing.BoundedWindow; |
| import org.apache.beam.sdk.transforms.windowing.WindowFn; |
| import org.apache.beam.sdk.util.WindowedValue; |
| import org.apache.beam.vendor.guava.v26_0_jre.com.google.common.collect.Iterables; |
| import org.joda.time.Instant; |
| |
| /** {@link org.apache.beam.sdk.transforms.windowing.WindowFn.AssignContext} for Flink functions. */ |
| class FlinkAssignContext<InputT, W extends BoundedWindow> |
| extends WindowFn<InputT, W>.AssignContext { |
| private final WindowedValue<InputT> value; |
| |
| FlinkAssignContext(WindowFn<InputT, W> fn, WindowedValue<InputT> value) { |
| fn.super(); |
| if (Iterables.size(value.getWindows()) != 1) { |
| throw new IllegalArgumentException( |
| String.format( |
| "%s passed to window assignment must be in a single window, but it was in %s: %s", |
| WindowedValue.class.getSimpleName(), |
| Iterables.size(value.getWindows()), |
| value.getWindows())); |
| } |
| this.value = value; |
| } |
| |
| @Override |
| public InputT element() { |
| return value.getValue(); |
| } |
| |
| @Override |
| public Instant timestamp() { |
| return value.getTimestamp(); |
| } |
| |
| @Override |
| public BoundedWindow window() { |
| return Iterables.getOnlyElement(value.getWindows()); |
| } |
| } |