[120] | 1 | /** |
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| 2 | * Licensed to the Apache Software Foundation (ASF) under one |
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| 3 | * or more contributor license agreements. See the NOTICE file |
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| 4 | * distributed with this work for additional information |
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| 5 | * regarding copyright ownership. The ASF licenses this file |
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| 6 | * to you under the Apache License, Version 2.0 (the |
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| 7 | * "License"); you may not use this file except in compliance |
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| 8 | * with the License. You may obtain a copy of the License at |
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| 9 | * |
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| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
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| 11 | * |
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| 12 | * Unless required by applicable law or agreed to in writing, software |
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| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
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| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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| 15 | * See the License for the specific language governing permissions and |
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| 16 | * limitations under the License. |
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| 17 | */ |
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| 18 | package org.apache.hadoop.fs; |
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| 19 | |
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| 20 | import java.io.*; |
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| 21 | |
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| 22 | /** Stream that permits seeking. */ |
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| 23 | public interface Seekable { |
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| 24 | /** |
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| 25 | * Seek to the given offset from the start of the file. |
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| 26 | * The next read() will be from that location. Can't |
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| 27 | * seek past the end of the file. |
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| 28 | */ |
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| 29 | void seek(long pos) throws IOException; |
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| 30 | |
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| 31 | /** |
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| 32 | * Return the current offset from the start of the file |
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| 33 | */ |
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| 34 | long getPos() throws IOException; |
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| 35 | |
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| 36 | /** |
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| 37 | * Seeks a different copy of the data. Returns true if |
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| 38 | * found a new source, false otherwise. |
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| 39 | */ |
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| 40 | boolean seekToNewSource(long targetPos) throws IOException; |
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| 41 | } |
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