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体验新版 GitCode,发现更多精彩内容 >>
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ad1d9362
编写于
5月 21, 2015
作者:
S
Stephan Ewen
浏览文件
操作
浏览文件
下载
电子邮件补丁
差异文件
[FLINK-2071] [java api] Fix serializability issue with projectsion function.
Improve type safety. Minor cleanups in ProjectOperator.
上级
6220f34b
变更
2
隐藏空白更改
内联
并排
Showing
2 changed file
with
41 addition
and
27 deletion
+41
-27
flink-java/src/main/java/org/apache/flink/api/java/operators/ProjectOperator.java
.../org/apache/flink/api/java/operators/ProjectOperator.java
+13
-14
flink-java/src/main/java/org/apache/flink/api/java/operators/translation/PlanProjectOperator.java
...k/api/java/operators/translation/PlanProjectOperator.java
+28
-13
未找到文件。
flink-java/src/main/java/org/apache/flink/api/java/operators/ProjectOperator.java
浏览文件 @
ad1d9362
...
...
@@ -82,7 +82,7 @@ public class ProjectOperator<IN, OUT extends Tuple>
* Continues a Project transformation on a {@link Tuple} {@link DataSet}.<br/>
* <b>Note: Only Tuple DataSets can be projected using field indexes.</b></br>
* The transformation projects each Tuple of the DataSet onto a (sub)set of fields.</br>
* Additional fields can be added to the projection by calling
{@link ProjectOperator#project(int[])}
.
* Additional fields can be added to the projection by calling
this method repeatedly
.
*
* <b>Note: With the current implementation, the Project transformation looses type information.</b>
*
...
...
@@ -94,8 +94,7 @@ public class ProjectOperator<IN, OUT extends Tuple>
* @see DataSet
* @see ProjectOperator
*/
@SuppressWarnings
(
"hiding"
)
public
<
OUT
extends
Tuple
>
ProjectOperator
<?,
OUT
>
project
(
int
...
fieldIndexes
)
{
public
<
R
extends
Tuple
>
ProjectOperator
<?,
R
>
project
(
int
...
fieldIndexes
)
{
proj
.
acceptAdditionalIndexes
(
fieldIndexes
);
return
proj
.
projectTupleX
();
...
...
@@ -103,10 +102,10 @@ public class ProjectOperator<IN, OUT extends Tuple>
/**
* Deprecated method only kept for compatibility.
*/
@SuppressWarnings
(
{
"unchecked"
,
"hiding"
}
)
@SuppressWarnings
(
"unchecked"
)
@Deprecated
public
<
OUT
extends
Tuple
>
ProjectOperator
<
IN
,
OUT
>
types
(
Class
<?>...
types
)
{
TupleTypeInfo
<
OUT
>
typeInfo
=
(
TupleTypeInfo
<
OUT
>)
this
.
getResultType
();
public
<
R
extends
Tuple
>
ProjectOperator
<
IN
,
R
>
types
(
Class
<?>...
types
)
{
TupleTypeInfo
<
R
>
typeInfo
=
(
TupleTypeInfo
<
R
>)
this
.
getResultType
();
if
(
types
.
length
!=
typeInfo
.
getArity
())
{
throw
new
InvalidProgramException
(
"Provided types do not match projection."
);
...
...
@@ -117,12 +116,12 @@ public class ProjectOperator<IN, OUT extends Tuple>
throw
new
InvalidProgramException
(
"Provided type "
+
typeClass
.
getSimpleName
()+
" at position "
+
i
+
" does not match projection"
);
}
}
return
(
ProjectOperator
<
IN
,
OUT
>)
this
;
return
(
ProjectOperator
<
IN
,
R
>)
this
;
}
public
static
class
Projection
<
T
>
{
private
final
DataSet
<
T
>
ds
;
private
final
DataSet
<
T
>
ds
;
private
int
[]
fieldIndexes
;
public
Projection
(
DataSet
<
T
>
ds
,
int
[]
fieldIndexes
)
{
...
...
@@ -138,9 +137,9 @@ public class ProjectOperator<IN, OUT extends Tuple>
"project() may select only up to ("
+
(
Tuple
.
MAX_ARITY
-
1
)
+
") fields."
);
}
int
maxFieldIndex
=
((
TupleTypeInfo
<?>)
ds
.
getType
()
).
getArity
();
for
(
int
i
=
0
;
i
<
fieldIndexes
.
length
;
i
++
)
{
Preconditions
.
checkElementIndex
(
fieldIndexe
s
[
i
]
,
maxFieldIndex
);
int
maxFieldIndex
=
ds
.
getType
(
).
getArity
();
for
(
int
fieldIndexe
:
fieldIndexes
)
{
Preconditions
.
checkElementIndex
(
fieldIndexe
,
maxFieldIndex
);
}
this
.
ds
=
ds
;
...
...
@@ -160,8 +159,8 @@ public class ProjectOperator<IN, OUT extends Tuple>
this
.
fieldIndexes
=
Arrays
.
copyOf
(
this
.
fieldIndexes
,
this
.
fieldIndexes
.
length
+
additionalIndexes
.
length
);
int
maxFieldIndex
=
((
TupleTypeInfo
<?>)
ds
.
getType
()
).
getArity
();
for
(
int
i
=
0
;
i
<
additionalIndexes
.
length
;
i
++)
{
int
maxFieldIndex
=
ds
.
getType
(
).
getArity
();
for
(
int
i
=
0
;
i
<
additionalIndexes
.
length
;
i
++)
{
Preconditions
.
checkElementIndex
(
additionalIndexes
[
i
],
maxFieldIndex
);
this
.
fieldIndexes
[
offset
+
i
]
=
additionalIndexes
[
i
];
...
...
@@ -186,7 +185,7 @@ public class ProjectOperator<IN, OUT extends Tuple>
*/
@SuppressWarnings
(
"unchecked"
)
public
<
OUT
extends
Tuple
>
ProjectOperator
<
T
,
OUT
>
projectTupleX
()
{
ProjectOperator
<
T
,
OUT
>
projOperator
=
null
;
ProjectOperator
<
T
,
OUT
>
projOperator
;
switch
(
fieldIndexes
.
length
)
{
case
1
:
projOperator
=
(
ProjectOperator
<
T
,
OUT
>)
projectTuple1
();
break
;
...
...
flink-java/src/main/java/org/apache/flink/api/java/operators/translation/PlanProjectOperator.java
浏览文件 @
ad1d9362
...
...
@@ -28,32 +28,47 @@ import org.apache.flink.api.java.tuple.Tuple;
public
class
PlanProjectOperator
<
T
,
R
extends
Tuple
>
extends
MapOperatorBase
<
T
,
R
,
MapFunction
<
T
,
R
>>
{
public
PlanProjectOperator
(
int
[]
fields
,
String
name
,
TypeInformation
<
T
>
inType
,
TypeInformation
<
R
>
outType
,
ExecutionConfig
executionConfig
)
{
super
(
new
MapProjector
<
T
,
R
>(
fields
,
outType
.
createSerializer
(
executionConfig
).
createInstance
()),
new
UnaryOperatorInformation
<
T
,
R
>(
inType
,
outType
),
name
);
public
PlanProjectOperator
(
int
[]
fields
,
String
name
,
TypeInformation
<
T
>
inType
,
TypeInformation
<
R
>
outType
,
ExecutionConfig
executionConfig
)
{
super
(
PlanProjectOperator
.<
T
,
R
,
Tuple
>
createTypedProjector
(
fields
),
new
UnaryOperatorInformation
<
T
,
R
>(
inType
,
outType
),
name
);
}
@SuppressWarnings
(
"unchecked"
)
private
static
<
T
,
R
extends
Tuple
,
X
extends
Tuple
>
MapFunction
<
T
,
R
>
createTypedProjector
(
int
[]
fields
)
{
return
(
MapFunction
<
T
,
R
>)
new
MapProjector
<
X
,
R
>(
fields
);
}
public
static
final
class
MapProjector
<
T
,
R
extends
Tuple
>
extends
AbstractRichFunction
implements
MapFunction
<
T
,
R
>
public
static
final
class
MapProjector
<
T
extends
Tuple
,
R
extends
Tuple
>
extends
AbstractRichFunction
implements
MapFunction
<
T
,
R
>
{
private
static
final
long
serialVersionUID
=
1L
;
private
final
int
[]
fields
;
private
final
R
outTuple
;
private
final
Tuple
outTuple
;
private
MapProjector
(
int
[]
fields
,
R
outTupleInstance
)
{
private
MapProjector
(
int
[]
fields
)
{
this
.
fields
=
fields
;
this
.
outTuple
=
outTupleInstance
;
try
{
this
.
outTuple
=
Tuple
.
getTupleClass
(
fields
.
length
).
newInstance
();
}
catch
(
Exception
e
)
{
// this should never happen
throw
new
RuntimeException
(
e
);
}
}
// TODO We should use code generation for this.
@SuppressWarnings
(
"unchecked"
)
@Override
public
R
map
(
T
inTuple
)
throws
Exception
{
for
(
int
i
=
0
;
i
<
fields
.
length
;
i
++)
{
outTuple
.
setField
(((
Tuple
)
inTuple
).
getField
(
fields
[
i
]),
i
);
public
R
map
(
Tuple
inTuple
)
throws
Exception
{
for
(
int
i
=
0
;
i
<
fields
.
length
;
i
++)
{
outTuple
.
setField
(
inTuple
.
getField
(
fields
[
i
]),
i
);
}
return
outTuple
;
return
(
R
)
outTuple
;
}
}
}
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