Skip to content
项目
群组
代码片段
帮助
正在加载...
帮助
为 GitLab 提交贡献
登录/注册
切换导航
H
h2database
项目
项目
详情
活动
周期分析
仓库
仓库
文件
提交
分支
标签
贡献者
分枝图
比较
统计图
议题
0
议题
0
列表
看板
标记
里程碑
合并请求
0
合并请求
0
CI / CD
CI / CD
流水线
作业
计划
统计图
Wiki
Wiki
代码片段
代码片段
成员
成员
折叠边栏
关闭边栏
活动
分枝图
统计图
创建新议题
作业
提交
议题看板
打开侧边栏
Administrator
h2database
Commits
79f90fe3
提交
79f90fe3
authored
11月 05, 2014
作者:
Thomas Mueller
浏览文件
操作
浏览文件
下载
电子邮件补丁
差异文件
Immutable array (work in progress)
上级
8c93fb4d
全部展开
显示空白字符变更
内嵌
并排
正在显示
4 个修改的文件
包含
986 行增加
和
0 行删除
+986
-0
TestImmutableArray.java
h2/src/test/org/h2/test/store/TestImmutableArray.java
+161
-0
ImmutableArray.java
h2/src/tools/org/h2/dev/util/ImmutableArray.java
+181
-0
ImmutableArray2.java
h2/src/tools/org/h2/dev/util/ImmutableArray2.java
+218
-0
ImmutableArray3.java
h2/src/tools/org/h2/dev/util/ImmutableArray3.java
+426
-0
没有找到文件。
h2/src/test/org/h2/test/store/TestImmutableArray.java
0 → 100644
浏览文件 @
79f90fe3
/*
* Copyright 2004-2014 H2 Group. Multiple-Licensed under the MPL 2.0,
* and the EPL 1.0 (http://h2database.com/html/license.html).
* Initial Developer: H2 Group
*/
package
org
.
h2
.
test
.
store
;
import
java.util.ArrayList
;
import
java.util.Iterator
;
import
java.util.Random
;
import
org.h2.dev.util.ImmutableArray2
;
import
org.h2.test.TestBase
;
/**
* Test the concurrent linked list.
*/
public
class
TestImmutableArray
extends
TestBase
{
/**
* Run just this test.
*
* @param a ignored
*/
public
static
void
main
(
String
...
a
)
throws
Exception
{
TestImmutableArray
test
=
(
TestImmutableArray
)
TestBase
.
createCaller
().
init
();
test
.
test
();
testPerformance
();
}
@Override
public
void
test
()
throws
Exception
{
testRandomized
();
}
private
static
void
testPerformance
()
{
testPerformance
(
true
);
testPerformance
(
false
);
testPerformance
(
true
);
testPerformance
(
false
);
testPerformance
(
true
);
testPerformance
(
false
);
}
private
static
void
testPerformance
(
final
boolean
immutable
)
{
// immutable time 2068 dummy: 60000000
// immutable time 1140 dummy: 60000000
// ArrayList time 361 dummy: 60000000
System
.
out
.
print
(
immutable
?
"immutable"
:
"ArrayList"
);
long
start
=
System
.
currentTimeMillis
();
int
count
=
20000000
;
Integer
x
=
1
;
int
sum
=
0
;
if
(
immutable
)
{
ImmutableArray2
<
Integer
>
test
=
ImmutableArray2
.
empty
();
for
(
int
i
=
0
;
i
<
count
;
i
++)
{
if
(
i
%
10
!=
0
)
{
test
=
test
.
insert
(
test
.
length
(),
x
);
}
else
{
test
=
test
.
insert
(
i
%
30
,
x
);
}
if
(
test
.
length
()
>
100
)
{
while
(
test
.
length
()
>
30
)
{
if
(
i
%
10
!=
0
)
{
test
=
test
.
remove
(
test
.
length
()
-
1
);
}
else
{
test
=
test
.
remove
(
0
);
}
}
}
sum
+=
test
.
get
(
0
);
sum
+=
test
.
get
(
test
.
length
()
-
1
);
sum
+=
test
.
get
(
test
.
length
()
/
2
);
if
(
i
%
10
==
0
)
{
test
=
test
.
set
(
0
,
x
);
}
}
}
else
{
ArrayList
<
Integer
>
test
=
new
ArrayList
<
Integer
>();
for
(
int
i
=
0
;
i
<
count
;
i
++)
{
if
(
i
%
10
!=
0
)
{
test
.
add
(
test
.
size
(),
x
);
}
else
{
test
.
add
(
i
%
30
,
x
);
}
if
(
test
.
size
()
>
100
)
{
while
(
test
.
size
()
>
30
)
{
if
(
i
%
2
==
0
)
{
test
.
remove
(
test
.
size
()
-
1
);
}
else
{
test
.
remove
(
0
);
}
}
}
sum
+=
test
.
get
(
0
);
sum
+=
test
.
get
(
test
.
size
()
-
1
);
sum
+=
test
.
get
(
test
.
size
()
/
2
);
if
(
i
%
10
==
0
)
{
test
.
set
(
0
,
x
);
}
}
}
System
.
out
.
println
(
" time "
+
(
System
.
currentTimeMillis
()
-
start
)
+
" dummy: "
+
sum
);
}
private
void
testRandomized
()
{
Random
r
=
new
Random
(
0
);
for
(
int
i
=
0
;
i
<
100
;
i
++)
{
ImmutableArray2
<
Integer
>
test
=
ImmutableArray2
.
empty
();
// ConcurrentRing<Integer> test = new ConcurrentRing<Integer>();
ArrayList
<
Integer
>
x
=
new
ArrayList
<
Integer
>();
StringBuilder
buff
=
new
StringBuilder
();
for
(
int
j
=
0
;
j
<
1000
;
j
++)
{
buff
.
append
(
"["
+
j
+
"] "
);
int
opType
=
r
.
nextInt
(
3
);
switch
(
opType
)
{
case
0
:
{
int
index
=
test
.
length
()
==
0
?
0
:
r
.
nextInt
(
test
.
length
());
int
value
=
r
.
nextInt
(
100
);
buff
.
append
(
"insert "
+
index
+
" "
+
value
+
"\n"
);
test
=
test
.
insert
(
index
,
value
);
x
.
add
(
index
,
value
);
break
;
}
case
1
:
{
if
(
test
.
length
()
>
0
)
{
int
index
=
r
.
nextInt
(
test
.
length
());
int
value
=
r
.
nextInt
(
100
);
buff
.
append
(
"set "
+
index
+
" "
+
value
+
"\n"
);
x
.
set
(
index
,
value
);
test
=
test
.
set
(
index
,
value
);
}
break
;
}
case
2
:
{
if
(
test
.
length
()
>
0
)
{
int
index
=
r
.
nextInt
(
test
.
length
());
buff
.
append
(
"remove "
+
index
+
"\n"
);
x
.
remove
(
index
);
test
=
test
.
remove
(
index
);
}
break
;
}
}
assertEquals
(
x
.
size
(),
test
.
length
());
assertEquals
(
toString
(
x
.
iterator
()),
toString
(
test
.
iterator
()));
}
}
}
private
static
<
T
>
String
toString
(
Iterator
<
T
>
it
)
{
StringBuilder
buff
=
new
StringBuilder
();
while
(
it
.
hasNext
())
{
buff
.
append
(
' '
).
append
(
it
.
next
());
}
return
buff
.
toString
();
}
}
h2/src/tools/org/h2/dev/util/ImmutableArray.java
0 → 100644
浏览文件 @
79f90fe3
/*
* Copyright 2004-2014 H2 Group. Multiple-Licensed under the MPL 2.0,
* and the EPL 1.0 (http://h2database.com/html/license.html).
* Initial Developer: H2 Group
*/
package
org
.
h2
.
dev
.
util
;
import
java.util.Arrays
;
import
java.util.Iterator
;
import
org.h2.mvstore.DataUtils
;
/**
* An immutable array.
*
* @param <K> the type
*/
public
final
class
ImmutableArray
<
K
>
implements
Iterable
<
K
>
{
private
static
final
ImmutableArray
<?>
EMPTY
=
new
ImmutableArray
<
Object
>(
new
Object
[
0
]);
/**
* The array.
*/
private
final
K
[]
array
;
private
ImmutableArray
(
K
[]
array
)
{
this
.
array
=
array
;
}
/**
* Get the entry at this index.
*
* @param index the index
* @return the entry
*/
public
K
get
(
int
index
)
{
return
array
[
index
];
}
/**
* Get the length.
*
* @return the length
*/
public
int
length
()
{
return
array
.
length
;
}
/**
* Set the entry at this index.
*
* @param index the index
* @param obj the object
* @return the new immutable array
*/
public
ImmutableArray
<
K
>
set
(
int
index
,
K
obj
)
{
K
[]
array
=
Arrays
.
copyOf
(
this
.
array
,
this
.
array
.
length
);
array
[
index
]
=
obj
;
return
new
ImmutableArray
<
K
>(
array
);
}
/**
* Insert an entry at this index.
*
* @param index the index
* @param obj the object
* @return the new immutable array
*/
public
ImmutableArray
<
K
>
insert
(
int
index
,
K
obj
)
{
int
len
=
array
.
length
+
1
;
@SuppressWarnings
(
"unchecked"
)
K
[]
array
=
(
K
[])
new
Object
[
len
];
DataUtils
.
copyWithGap
(
this
.
array
,
array
,
this
.
array
.
length
,
index
);
array
[
index
]
=
obj
;
return
new
ImmutableArray
<
K
>(
array
);
}
/**
* Remove the entry at this index.
*
* @param index the index
* @return the new immutable array
*/
public
ImmutableArray
<
K
>
remove
(
int
index
)
{
int
len
=
array
.
length
-
1
;
@SuppressWarnings
(
"unchecked"
)
K
[]
array
=
(
K
[])
new
Object
[
len
];
DataUtils
.
copyExcept
(
this
.
array
,
array
,
this
.
array
.
length
,
index
);
return
new
ImmutableArray
<
K
>(
array
);
}
/**
* Get a sub-array.
*
* @param fromIndex the index of the first entry
* @param toIndex the end index, plus one
* @return the new immutable array
*/
public
ImmutableArray
<
K
>
subArray
(
int
fromIndex
,
int
toIndex
)
{
int
len
=
toIndex
-
fromIndex
;
@SuppressWarnings
(
"unchecked"
)
K
[]
array
=
(
K
[])
new
Object
[
len
];
System
.
arraycopy
(
this
.
array
,
fromIndex
,
array
,
0
,
toIndex
-
fromIndex
);
return
new
ImmutableArray
<
K
>(
array
);
}
/**
* Create an immutable array.
*
* @param array the data
* @return the new immutable array
*/
public
static
<
K
>
ImmutableArray
<
K
>
create
(
K
...
array
)
{
return
new
ImmutableArray
<
K
>(
array
);
}
/**
* Get the data.
*
* @return the data
*/
public
K
[]
array
()
{
return
array
;
}
@Override
public
String
toString
()
{
StringBuilder
buff
=
new
StringBuilder
();
for
(
K
obj
:
this
)
{
buff
.
append
(
' '
).
append
(
obj
);
}
return
buff
.
toString
();
}
/**
* Get an empty immutable array.
*
* @param <K> the key type
* @return the array
*/
@SuppressWarnings
(
"unchecked"
)
public
static
<
K
>
ImmutableArray
<
K
>
empty
()
{
return
(
ImmutableArray
<
K
>)
EMPTY
;
}
/**
* Get an iterator over all entries.
*
* @return the iterator
*/
@Override
public
Iterator
<
K
>
iterator
()
{
return
new
Iterator
<
K
>()
{
ImmutableArray
<
K
>
a
=
ImmutableArray
.
this
;
int
index
;
@Override
public
boolean
hasNext
()
{
return
index
<
a
.
length
();
}
@Override
public
K
next
()
{
return
a
.
get
(
index
++);
}
@Override
public
void
remove
()
{
throw
DataUtils
.
newUnsupportedOperationException
(
"remove"
);
}
};
}
}
h2/src/tools/org/h2/dev/util/ImmutableArray2.java
0 → 100644
浏览文件 @
79f90fe3
/*
* Copyright 2004-2014 H2 Group. Multiple-Licensed under the MPL 2.0,
* and the EPL 1.0 (http://h2database.com/html/license.html).
* Initial Developer: H2 Group
*/
package
org
.
h2
.
dev
.
util
;
import
java.util.Arrays
;
import
java.util.Iterator
;
import
java.util.concurrent.atomic.AtomicBoolean
;
import
org.h2.mvstore.DataUtils
;
/**
* An immutable array.
*
* @param <K> the type
*/
public
final
class
ImmutableArray2
<
K
>
implements
Iterable
<
K
>
{
private
static
final
ImmutableArray2
<?>
EMPTY
=
new
ImmutableArray2
<
Object
>(
new
Object
[
0
],
0
);
/**
* The array.
*/
private
final
K
[]
array
;
private
final
int
length
;
private
AtomicBoolean
canExtend
;
private
ImmutableArray2
(
K
[]
array
,
int
len
)
{
this
.
array
=
array
;
this
.
length
=
len
;
}
private
ImmutableArray2
(
K
[]
array
,
int
len
,
boolean
canExtend
)
{
this
.
array
=
array
;
this
.
length
=
len
;
if
(
canExtend
)
{
this
.
canExtend
=
new
AtomicBoolean
(
true
);
}
}
/**
* Get the entry at this index.
*
* @param index the index
* @return the entry
*/
public
K
get
(
int
index
)
{
if
(
index
>=
length
)
{
throw
new
IndexOutOfBoundsException
();
}
return
array
[
index
];
}
/**
* Get the length.
*
* @return the length
*/
public
int
length
()
{
return
length
;
}
/**
* Set the entry at this index.
*
* @param index the index
* @param obj the object
* @return the new immutable array
*/
public
ImmutableArray2
<
K
>
set
(
int
index
,
K
obj
)
{
K
[]
a2
=
Arrays
.
copyOf
(
array
,
length
);
a2
[
index
]
=
obj
;
return
new
ImmutableArray2
<
K
>(
a2
,
length
);
}
/**
* Insert an entry at this index.
*
* @param index the index
* @param obj the object
* @return the new immutable array
*/
public
ImmutableArray2
<
K
>
insert
(
int
index
,
K
obj
)
{
int
len
=
length
+
1
;
int
newLen
=
len
;
boolean
extendable
;
if
(
index
==
len
-
1
)
{
AtomicBoolean
x
=
canExtend
;
// can set it to null early - we anyway
// reset the flag, so it is no longer useful
canExtend
=
null
;
if
(
array
.
length
>
index
&&
x
!=
null
)
{
if
(
x
.
getAndSet
(
false
))
{
array
[
index
]
=
obj
;
return
new
ImmutableArray2
<
K
>(
array
,
len
,
true
);
}
}
extendable
=
true
;
newLen
=
len
+
4
;
}
else
{
extendable
=
false
;
}
@SuppressWarnings
(
"unchecked"
)
K
[]
a2
=
(
K
[])
new
Object
[
newLen
];
DataUtils
.
copyWithGap
(
array
,
a2
,
length
,
index
);
a2
[
index
]
=
obj
;
return
new
ImmutableArray2
<
K
>(
a2
,
len
,
extendable
);
}
/**
* Remove the entry at this index.
*
* @param index the index
* @return the new immutable array
*/
public
ImmutableArray2
<
K
>
remove
(
int
index
)
{
int
len
=
length
-
1
;
if
(
index
==
len
)
{
return
new
ImmutableArray2
<
K
>(
array
,
len
);
}
@SuppressWarnings
(
"unchecked"
)
K
[]
a2
=
(
K
[])
new
Object
[
len
];
DataUtils
.
copyExcept
(
array
,
a2
,
length
,
index
);
return
new
ImmutableArray2
<
K
>(
a2
,
len
);
}
/**
* Get a sub-array.
*
* @param fromIndex the index of the first entry
* @param toIndex the end index, plus one
* @return the new immutable array
*/
public
ImmutableArray2
<
K
>
subArray
(
int
fromIndex
,
int
toIndex
)
{
int
len
=
toIndex
-
fromIndex
;
if
(
fromIndex
==
0
)
{
return
new
ImmutableArray2
<
K
>(
array
,
len
);
}
@SuppressWarnings
(
"unchecked"
)
K
[]
a2
=
(
K
[])
new
Object
[
len
];
System
.
arraycopy
(
array
,
fromIndex
,
a2
,
0
,
toIndex
-
fromIndex
);
return
new
ImmutableArray2
<
K
>(
a2
,
len
);
}
/**
* Create an immutable array.
*
* @param array the data
* @return the new immutable array
*/
public
static
<
K
>
ImmutableArray2
<
K
>
create
(
K
...
array
)
{
return
new
ImmutableArray2
<
K
>(
array
,
array
.
length
);
}
/**
* Get the data.
*
* @return the data
*/
public
K
[]
array
()
{
return
array
;
}
@Override
public
String
toString
()
{
StringBuilder
buff
=
new
StringBuilder
();
for
(
K
obj
:
this
)
{
buff
.
append
(
' '
).
append
(
obj
);
}
return
buff
.
toString
();
}
/**
* Get an empty immutable array.
*
* @param <K> the key type
* @return the array
*/
@SuppressWarnings
(
"unchecked"
)
public
static
<
K
>
ImmutableArray2
<
K
>
empty
()
{
return
(
ImmutableArray2
<
K
>)
EMPTY
;
}
/**
* Get an iterator over all entries.
*
* @return the iterator
*/
@Override
public
Iterator
<
K
>
iterator
()
{
return
new
Iterator
<
K
>()
{
ImmutableArray2
<
K
>
a
=
ImmutableArray2
.
this
;
int
index
;
@Override
public
boolean
hasNext
()
{
return
index
<
a
.
length
();
}
@Override
public
K
next
()
{
return
a
.
get
(
index
++);
}
@Override
public
void
remove
()
{
throw
DataUtils
.
newUnsupportedOperationException
(
"remove"
);
}
};
}
}
h2/src/tools/org/h2/dev/util/ImmutableArray3.java
0 → 100644
浏览文件 @
79f90fe3
差异被折叠。
点击展开。
编写
预览
Markdown
格式
0%
重试
或
添加新文件
添加附件
取消
您添加了
0
人
到此讨论。请谨慎行事。
请先完成此评论的编辑!
取消
请
注册
或者
登录
后发表评论