public class TextStemmer extends ExecutableOperator implements RecordPipelineOperator
Constructor and Description |
---|
TextStemmer()
Default constructor.
|
TextStemmer(String textField)
Constructor specifying the tokenized text field to stem.
|
TextStemmer(String textField,
StemmerType type)
Constructor specifying the tokenized text field to stem and
the stemmer to utilize.
|
Modifier and Type | Method and Description |
---|---|
protected void |
computeMetadata(StreamingMetadataContext ctx)
Implementations must adhere to the following contracts
|
protected void |
execute(ExecutionContext ctx)
Executes the operator.
|
RecordPort |
getInput()
Get the input port of this operator.
|
String |
getInputField()
Get the tokenized text field to stem.
|
RecordPort |
getOutput()
Get the output port of this operator.
|
String |
getOutputField()
Get the stemmed output field.
|
StemmerType |
getStemmerType()
Get the stemmer that will be used.
|
void |
setInputField(String textField)
Set the field to stem.
|
void |
setOutputField(String tokenField)
Set the stemmed output field.
|
void |
setStemmerType(StemmerType type)
Set the stemmer the operator should use.
|
cloneForExecution, getNumInputCopies, getPortSettings, handleInactiveOutput
disableParallelism, getInputPorts, getOutputPorts, newInput, newInput, newOutput, newRecordInput, newRecordInput, newRecordOutput, notifyError
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
disableParallelism, getInputPorts, getOutputPorts
public TextStemmer()
setInputField(String)
and
setOutputField(String)
to set the name of the text
field to stem and its output field.public TextStemmer(String textField)
textField
- name of the field to stempublic TextStemmer(String textField, StemmerType type)
textField
- name of the field to stemtype
- stemmer algorithm to usepublic void setInputField(String textField)
If this field does not exist in the input, or is not of type TokenizedText, an exception will be thrown at composition time.
textField
- the name of the field to stempublic String getInputField()
public void setOutputField(String tokenField)
tokenField
- name of the token output fieldpublic String getOutputField()
public void setStemmerType(StemmerType type)
type
- the stemmer algorithm to usepublic StemmerType getStemmerType()
public RecordPort getInput()
getInput
in interface PipelineOperator<RecordPort>
public RecordPort getOutput()
getOutput
in interface PipelineOperator<RecordPort>
protected void computeMetadata(StreamingMetadataContext ctx)
StreamingOperator
StreamingMetadataContext.parallelize(ParallelismStrategy)
.
RecordPort#setRequiredDataOrdering
, otherwise data may arrive in any order.
RecordPort#setRequiredDataDistribution
, otherwise data will arrive in an unspecified partial distribution
.
RecordPort#getSourceDataDistribution
and RecordPort#getSourceDataOrdering
. These should be
viewed as a hints to help chose a more efficient algorithm. In such cases, though, operators must
still declare data ordering and data distribution requirements; otherwise there is no guarantee that
data will arrive sorted/distributed as required.
RecordPort#setType
.RecordPort#setOutputDataOrdering
RecordPort#setOutputDataDistribution
AbstractModelPort#setMergeHandler
.MergeModel
is a convenient, re-usable model reducer, parameterized with
a merge-handler.
SimpleModelPort
's have no associated metadata and therefore there is
never any output metadata to declare. PMMLPort
's, on the other hand,
do have associated metadata. For all PMMLPorts, implementations must declare
the following:
PMMLPort.setPMMLModelSpec
.
computeMetadata
in class StreamingOperator
ctx
- the contextprotected void execute(ExecutionContext ctx)
ExecutableOperator
execute
in class ExecutableOperator
ctx
- context in which to lookup physical ports bound to logical portsCopyright © 2016 Actian Corporation. All rights reserved.