public class CalculateWordFrequency extends ExecutableOperator implements RecordPipelineOperator
Constructor and Description |
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CalculateWordFrequency()
Default constructor.
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CalculateWordFrequency(String textField)
Constructor specifying the tokenized text field to determine the
word frequencies for.
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Modifier and Type | Method and Description |
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protected void |
computeMetadata(StreamingMetadataContext ctx)
Implementations must adhere to the following contracts
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protected void |
execute(ExecutionContext ctx)
Executes the operator.
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RecordPort |
getInput()
Get the input port of this operator.
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String |
getInputField()
Get the field to calculate the word frequencies for.
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RecordPort |
getOutput()
Get the output port of this operator.
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String |
getWordFreqOutputField()
Get the field that will contain the word frequency map.
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void |
setInputField(String textField)
Set the field to calculate the word frequencies for.
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void |
setWordFreqOutputField(String wordFreqOutputField)
Set the field that will contain the word frequency map.
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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 CalculateWordFrequency()
setInputField(String)
,
setWordFreqOutputField(String)
to set the name
of the text field to count and the output field.public CalculateWordFrequency(String textField)
textField
- name of the tokenized text field in the inputpublic 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
- name of the tokenized text field in the inputpublic String getInputField()
public void setWordFreqOutputField(String wordFreqOutputField)
wordFreqOutputField
- name of the word field in the outputpublic String getWordFreqOutputField()
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 © 2024 Actian Corporation. All rights reserved.