hadoop SplitCompressionInputStream 源码
haddop SplitCompressionInputStream 代码
文件路径：/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/SplitCompressionInputStream.java
/*
* 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.hadoop.io.compress;
import java.io.IOException;
import java.io.InputStream;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
/**
* An InputStream covering a range of compressed data. The start and end
* offsets requested by a client may be modified by the codec to fit block
* boundaries or other algorithm-dependent requirements.
*/
@InterfaceAudience.Public
@InterfaceStability.Evolving
public abstract class SplitCompressionInputStream
extends CompressionInputStream {
private long start;
private long end;
public SplitCompressionInputStream(InputStream in, long start, long end)
throws IOException {
super(in);
this.start = start;
this.end = end;
}
protected void setStart(long start) {
this.start = start;
}
protected void setEnd(long end) {
this.end = end;
}
/**
* After calling createInputStream, the values of start or end
* might change. So this method can be used to get the new value of start.
* @return The changed value of start
*/
public long getAdjustedStart() {
return start;
}
/**
* After calling createInputStream, the values of start or end
* might change. So this method can be used to get the new value of end.
* @return The changed value of end
*/
public long getAdjustedEnd() {
return end;
}
}
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