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[core] Introduce VectoredReadable to SeekableInputStream (apache#3369)
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paimon-common/src/main/java/org/apache/paimon/fs/FileRange.java
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| /* | ||
| * 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. | ||
| */ | ||
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| package org.apache.paimon.fs; | ||
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| import java.util.concurrent.CompletableFuture; | ||
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| /* This file is based on source code from the Hadoop Project (http://hadoop.apache.org/), licensed by the Apache | ||
| * Software Foundation (ASF) under the Apache License, Version 2.0. See the NOTICE file distributed with this work for | ||
| * additional information regarding copyright ownership. */ | ||
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| /** A byte range of a file. */ | ||
| public interface FileRange { | ||
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| /** Get the starting offset of the range. */ | ||
| long getOffset(); | ||
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| /** Get the length of the range. */ | ||
| int getLength(); | ||
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| /** Get the future data for this range. */ | ||
| CompletableFuture<byte[]> getData(); | ||
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| /** | ||
| * Factory method to create a FileRange object. | ||
| * | ||
| * @param offset starting offset of the range. | ||
| * @param length length of the range. | ||
| * @return a new instance of FileRangeImpl. | ||
| */ | ||
| static FileRange createFileRange(long offset, int length) { | ||
| return new FileRangeImpl(offset, length); | ||
| } | ||
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| /** An implementation for {@link FileRange}. */ | ||
| class FileRangeImpl implements FileRange { | ||
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| private final long offset; | ||
| private final int length; | ||
| private final CompletableFuture<byte[]> reader; | ||
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| public FileRangeImpl(long offset, int length) { | ||
| this.offset = offset; | ||
| this.length = length; | ||
| this.reader = new CompletableFuture<>(); | ||
| } | ||
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| @Override | ||
| public String toString() { | ||
| return "range[" + offset + "," + (offset + length) + ")"; | ||
| } | ||
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| @Override | ||
| public long getOffset() { | ||
| return offset; | ||
| } | ||
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| @Override | ||
| public int getLength() { | ||
| return length; | ||
| } | ||
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| @Override | ||
| public CompletableFuture<byte[]> getData() { | ||
| return reader; | ||
| } | ||
| } | ||
| } |
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