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1 | /* |
2 | * Licensed to the Apache Software Foundation (ASF) under one or more | |
3 | * contributor license agreements. See the NOTICE file distributed with | |
4 | * this work for additional information regarding copyright ownership. | |
5 | * The ASF licenses this file to You under the Apache License, Version 2.0 | |
6 | * (the "License"); you may not use this file except in compliance with | |
7 | * the License. You may obtain a copy of the License at | |
8 | * | |
9 | * http://www.apache.org/licenses/LICENSE-2.0 | |
10 | * | |
11 | * Unless required by applicable law or agreed to in writing, software | |
12 | * distributed under the License is distributed on an "AS IS" BASIS, | |
13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
14 | * See the License for the specific language governing permissions and | |
15 | * limitations under the License. | |
16 | */ | |
17 | ||
18 | package org.apache.arrow.vector.ipc.message; | |
19 | ||
20 | /** | |
21 | * Interface for Arrow IPC messages (https://arrow.apache.org/docs/format/IPC.html). | |
22 | */ | |
23 | public interface ArrowMessage extends FBSerializable, AutoCloseable { | |
24 | ||
25 | long computeBodyLength(); | |
26 | ||
27 | <T> T accepts(ArrowMessageVisitor<T> visitor); | |
28 | ||
29 | /** Returns the flatbuffer enum value indicating the type of the message. */ | |
30 | byte getMessageType(); | |
31 | ||
32 | /** | |
33 | * Visitor interface for implementations of {@link ArrowMessage}. | |
34 | * | |
35 | * @param <T> The type of value to return after visiting. | |
36 | */ | |
37 | interface ArrowMessageVisitor<T> { | |
38 | T visit(ArrowDictionaryBatch message); | |
39 | ||
40 | T visit(ArrowRecordBatch message); | |
41 | } | |
42 | } |