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Revert "HBASE-19651 Remove LimitInputStream"
Revert to put Beluga in place as author. This reverts commit 032fdc5.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,7 @@ | ||
| -- | ||
| This product includes portions of the Guava project v14, specifically | ||
| 'hbase-common/src/main/java/org/apache/hadoop/hbase/io/LimitInputStream.java' | ||
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| Copyright (C) 2007 The Guava Authors | ||
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| Licensed under the Apache License, Version 2.0 |
105 changes: 105 additions & 0 deletions
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hbase-common/src/main/java/org/apache/hadoop/hbase/io/LimitInputStream.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,105 @@ | ||
| /* | ||
| * Copyright (C) 2007 The Guava Authors | ||
| * | ||
| * Licensed 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.hadoop.hbase.io; | ||
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| import static org.apache.hbase.thirdparty.com.google.common.base.Preconditions.checkArgument; | ||
| import static org.apache.hbase.thirdparty.com.google.common.base.Preconditions.checkNotNull; | ||
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| import java.io.FilterInputStream; | ||
| import java.io.IOException; | ||
| import java.io.InputStream; | ||
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| import org.apache.yetus.audience.InterfaceAudience; | ||
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| /** | ||
| * Copied from guava source code v15 (LimitedInputStream) | ||
| * Guava deprecated LimitInputStream in v14 and removed it in v15. Copying this class here | ||
| * allows to be compatible with guava 11 to 15+. | ||
| */ | ||
| @InterfaceAudience.Private | ||
| public final class LimitInputStream extends FilterInputStream { | ||
| private long left; | ||
| private long mark = -1; | ||
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| public LimitInputStream(InputStream in, long limit) { | ||
| super(in); | ||
| checkNotNull(in); | ||
| checkArgument(limit >= 0, "limit must be non-negative"); | ||
| left = limit; | ||
| } | ||
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| @Override | ||
| public int available() throws IOException { | ||
| return (int) Math.min(in.available(), left); | ||
| } | ||
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| // it's okay to mark even if mark isn't supported, as reset won't work | ||
| @Override | ||
| public synchronized void mark(int readLimit) { | ||
| in.mark(readLimit); | ||
| mark = left; | ||
| } | ||
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| @Override | ||
| public int read() throws IOException { | ||
| if (left == 0) { | ||
| return -1; | ||
| } | ||
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| int result = in.read(); | ||
| if (result != -1) { | ||
| --left; | ||
| } | ||
| return result; | ||
| } | ||
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| @Override | ||
| public int read(byte[] b, int off, int len) throws IOException { | ||
| if (left == 0) { | ||
| return -1; | ||
| } | ||
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| len = (int) Math.min(len, left); | ||
| int result = in.read(b, off, len); | ||
| if (result != -1) { | ||
| left -= result; | ||
| } | ||
| return result; | ||
| } | ||
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| @Override | ||
| public synchronized void reset() throws IOException { | ||
| if (!in.markSupported()) { | ||
| throw new IOException("Mark not supported"); | ||
| } | ||
| if (mark == -1) { | ||
| throw new IOException("Mark not set"); | ||
| } | ||
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| in.reset(); | ||
| left = mark; | ||
| } | ||
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| @Override | ||
| public long skip(long n) throws IOException { | ||
| n = Math.min(n, left); | ||
| long skipped = in.skip(n); | ||
| left -= skipped; | ||
| return skipped; | ||
| } | ||
| } |
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