| /* |
| * 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.samza.system.descriptors; |
| |
| import org.apache.samza.serializers.Serde; |
| |
| /** |
| * Interface for advanced {@code SystemDescriptor}s that constrain the type of returned {@code InputDescriptor}s to |
| * their own {@code StreamExpander} function result types. |
| * |
| * @param <StreamExpanderType> type of the system level {@code StreamExpander} results |
| */ |
| public interface ExpandingInputDescriptorProvider<StreamExpanderType> { |
| |
| /** |
| * Gets a {@link InputDescriptor} for an input stream on this system. The stream has the provided |
| * stream level serde, and the default system level {@code StreamExpander} |
| * <p> |
| * The type of messages in the stream is the type of messages returned by the default system level |
| * {@code StreamExpander} |
| * |
| * @param streamId id of the input stream |
| * @param serde stream level serde to be propagated to expanded input streams |
| * @return an {@link InputDescriptor} for the input stream |
| */ |
| InputDescriptor<StreamExpanderType, ? extends InputDescriptor> getInputDescriptor(String streamId, Serde serde); |
| } |
