| /* |
| * 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.sdk.util; |
| |
| import java.util.Collection; |
| import java.util.Collections; |
| import org.apache.beam.sdk.coders.Coder; |
| import org.apache.beam.sdk.transforms.windowing.BoundedWindow; |
| import org.apache.beam.sdk.transforms.windowing.GlobalWindow; |
| import org.apache.beam.sdk.transforms.windowing.IncompatibleWindowException; |
| import org.apache.beam.sdk.transforms.windowing.NonMergingWindowFn; |
| import org.apache.beam.sdk.transforms.windowing.WindowFn; |
| import org.apache.beam.sdk.transforms.windowing.WindowMappingFn; |
| |
| /** |
| * A {@link WindowFn} for use during tests that returns the input window for calls to {@link |
| * #getSideInputWindow(BoundedWindow)}. |
| */ |
| public class IdentitySideInputWindowFn extends NonMergingWindowFn<Integer, BoundedWindow> { |
| @Override |
| public Collection<BoundedWindow> assignWindows(WindowFn<Integer, BoundedWindow>.AssignContext c) |
| throws Exception { |
| return Collections.singleton(c.window()); |
| } |
| |
| @Override |
| public boolean isCompatible(WindowFn<?, ?> other) { |
| return true; |
| } |
| |
| @Override |
| public void verifyCompatibility(WindowFn<?, ?> other) throws IncompatibleWindowException {} |
| |
| @Override |
| public Coder<BoundedWindow> windowCoder() { |
| // not used |
| return (Coder) GlobalWindow.Coder.INSTANCE; |
| } |
| |
| @Override |
| public WindowMappingFn<BoundedWindow> getDefaultWindowMappingFn() { |
| return new WindowMappingFn<BoundedWindow>() { |
| @Override |
| public BoundedWindow getSideInputWindow(BoundedWindow window) { |
| return window; |
| } |
| }; |
| } |
| } |