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InputStreamByteIterator.java
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Created
Sat, Aug 31, 01:39
Size
1 KB
Mime Type
text/x-java
Expires
Mon, Sep 2, 01:39 (2 d)
Engine
blob
Format
Raw Data
Handle
20338942
Attached To
R7507 YCSB
InputStreamByteIterator.java
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/**
* Copyright (c) 2010-2016 Yahoo! Inc., 2017 YCSB contributors All rights reserved.
* <p>
* 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
* <p>
* http://www.apache.org/licenses/LICENSE-2.0
* <p>
* 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. See accompanying
* LICENSE file.
*/
package
com.yahoo.ycsb
;
import
java.io.IOException
;
import
java.io.InputStream
;
/**
* A ByteIterator that iterates through an inputstream of bytes.
*/
public
class
InputStreamByteIterator
extends
ByteIterator
{
private
long
len
;
private
InputStream
ins
;
private
long
off
;
private
final
boolean
resetable
;
public
InputStreamByteIterator
(
InputStream
ins
,
long
len
)
{
this
.
len
=
len
;
this
.
ins
=
ins
;
off
=
0
;
resetable
=
ins
.
markSupported
();
if
(
resetable
)
{
ins
.
mark
((
int
)
len
);
}
}
@Override
public
boolean
hasNext
()
{
return
off
<
len
;
}
@Override
public
byte
nextByte
()
{
int
ret
;
try
{
ret
=
ins
.
read
();
}
catch
(
Exception
e
)
{
throw
new
IllegalStateException
(
e
);
}
if
(
ret
==
-
1
)
{
throw
new
IllegalStateException
(
"Past EOF!"
);
}
off
++;
return
(
byte
)
ret
;
}
@Override
public
long
bytesLeft
()
{
return
len
-
off
;
}
@Override
public
void
reset
()
{
if
(
resetable
)
{
try
{
ins
.
reset
();
ins
.
mark
((
int
)
len
);
}
catch
(
IOException
e
)
{
throw
new
IllegalStateException
(
"Failed to reset the input stream"
,
e
);
}
}
throw
new
UnsupportedOperationException
();
}
}
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