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StringByteIterator.java
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Created
Thu, Sep 5, 04:43
Size
4 KB
Mime Type
text/x-java
Expires
Sat, Sep 7, 04:43 (2 d)
Engine
blob
Format
Raw Data
Handle
20544326
Attached To
R7507 YCSB
StringByteIterator.java
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/**
* Copyright (c) 2010 Yahoo! Inc. All rights reserved.
*
* 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. See accompanying
* LICENSE file.
*/
package
com.yahoo.ycsb
;
import
java.util.Map
;
import
java.util.HashMap
;
public
class
StringByteIterator
extends
ByteIterator
{
String
str
;
int
off
;
/**
* Put all of the entries of one map into the other, converting
* String values into ByteIterators.
*/
public
static
void
putAllAsByteIterators
(
Map
<
String
,
ByteIterator
>
out
,
Map
<
String
,
String
>
in
)
{
for
(
String
s:
in
.
keySet
())
{
out
.
put
(
s
,
new
StringByteIterator
(
in
.
get
(
s
)));
}
}
/**
* Put all of the entries of one map into the other, converting
* ByteIterator values into Strings.
*/
public
static
void
putAllAsStrings
(
Map
<
String
,
String
>
out
,
Map
<
String
,
ByteIterator
>
in
)
{
for
(
String
s:
in
.
keySet
())
{
out
.
put
(
s
,
in
.
get
(
s
).
toString
());
}
}
/**
* Create a copy of a map, converting the values from Strings to
* StringByteIterators.
*/
public
static
HashMap
<
String
,
ByteIterator
>
getByteIteratorMap
(
Map
<
String
,
String
>
m
)
{
HashMap
<
String
,
ByteIterator
>
ret
=
new
HashMap
<
String
,
ByteIterator
>();
for
(
String
s:
m
.
keySet
())
{
ret
.
put
(
s
,
new
StringByteIterator
(
m
.
get
(
s
)));
}
return
ret
;
}
/**
* Create a copy of a map, converting the values from
* StringByteIterators to Strings.
*/
public
static
HashMap
<
String
,
String
>
getStringMap
(
Map
<
String
,
ByteIterator
>
m
)
{
HashMap
<
String
,
String
>
ret
=
new
HashMap
<
String
,
String
>();
for
(
String
s:
m
.
keySet
())
{
ret
.
put
(
s
,
m
.
get
(
s
).
toString
());;
}
return
ret
;
}
public
StringByteIterator
(
String
s
)
{
this
.
str
=
s
;
this
.
off
=
0
;
}
@Override
public
boolean
hasNext
()
{
return
off
<
str
.
length
();
}
@Override
public
byte
nextByte
()
{
byte
ret
=
(
byte
)
str
.
charAt
(
off
);
off
++;
return
ret
;
}
@Override
public
long
bytesLeft
()
{
return
str
.
length
()
-
off
;
}
/**
* Specialization of general purpose toString() to avoid unnecessary
* copies.
* <p>
* Creating a new StringByteIterator, then calling toString()
* yields the original String object, and does not perform any copies
* or String conversion operations.
* </p>
*/
@Override
public
String
toString
()
{
if
(
off
>
0
)
{
return
super
.
toString
();
}
else
{
return
str
;
}
}
}
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