Class AbstractBatchedObjectColumnProcessor<T extends Context>
- All Implemented Interfaces:
ConversionProcessor
,Processor<T>
- Direct Known Subclasses:
BatchedObjectColumnProcessor
Processor
implementation for converting batches of rows extracted from any implementation of AbstractParser
into columns of objects.
This uses the value conversions provided by Conversion
instances.
For each row processed, a sequence of conversions will be executed to generate the appropriate object. Each resulting object will then be stored in a list that contains the values of the corresponding column.
During the execution of the process, the batchProcessed(int)
method will be invoked after a given number of rows has been processed.
The user can access the lists with values parsed for all columns using the methods getColumnValuesAsList()
,
getColumnValuesAsMapOfIndexes()
and getColumnValuesAsMapOfNames()
.
After batchProcessed(int)
is invoked, all values will be discarded and the next batch of column values will be accumulated.
This process will repeat until there's no more rows in the input.
- Author:
- Univocity Software Pty Ltd - parsers@univocity.com
- See Also:
-
AbstractParser
Processor
BatchedColumnReader
Conversion
AbstractObjectProcessor
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Field Summary
Fields inherited from class com.univocity.parsers.common.DefaultConversionProcessor
conversions
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Constructor Summary
ConstructorsConstructorDescriptionAbstractBatchedObjectColumnProcessor
(int rowsPerBatch) Constructs a abstract batched column processor configured to invoke thebatchesProcessed
method after a given number of rows has been processed. -
Method Summary
Modifier and TypeMethodDescriptionabstract void
batchProcessed
(int rowsInThisBatch) int
getColumn
(int columnIndex) <V> List<V>
Returns the values of a given column.<V> List<V>
Returns the values of a given column.final String[]
int
void
processEnded
(T context) This method will by invoked by the parser once, after the parsing process stopped and all resources were closed.void
processStarted
(T context) This method will by invoked by the parser once, when it is ready to start processing the input.final void
final void
void
rowProcessed
(Object[] row, T context) Invoked by the processor after all values of a valid record have been processed and converted into an Object array.Methods inherited from class com.univocity.parsers.common.processor.core.AbstractObjectProcessor
rowProcessed
Methods inherited from class com.univocity.parsers.common.DefaultConversionProcessor
applyConversions, convertAll, convertFields, convertIndexes, convertType, handleConversionError, initializeConversions, reverseConversions, toDataProcessingException
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Methods inherited from interface com.univocity.parsers.common.processor.core.Processor
rowProcessed
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Constructor Details
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AbstractBatchedObjectColumnProcessor
public AbstractBatchedObjectColumnProcessor(int rowsPerBatch) Constructs a abstract batched column processor configured to invoke thebatchesProcessed
method after a given number of rows has been processed.- Parameters:
rowsPerBatch
- the number of rows to process in each batch.
-
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Method Details
-
processStarted
Description copied from interface:Processor
This method will by invoked by the parser once, when it is ready to start processing the input.- Specified by:
processStarted
in interfaceProcessor<T extends Context>
- Overrides:
processStarted
in classAbstractObjectProcessor<T extends Context>
- Parameters:
context
- A contextual object with information and controls over the current state of the parsing process
-
rowProcessed
Description copied from class:AbstractObjectProcessor
Invoked by the processor after all values of a valid record have been processed and converted into an Object array.- Specified by:
rowProcessed
in classAbstractObjectProcessor<T extends Context>
- Parameters:
row
- object array created with the information extracted by the parser and then converted.context
- A contextual object with information and controls over the current state of the parsing process
-
processEnded
Description copied from interface:Processor
This method will by invoked by the parser once, after the parsing process stopped and all resources were closed.It will always be called by the parser: in case of errors, if the end of the input us reached, or if the user stopped the process manually using
Context.stop()
.- Specified by:
processEnded
in interfaceProcessor<T extends Context>
- Overrides:
processEnded
in classAbstractObjectProcessor<T extends Context>
- Parameters:
context
- A contextual object with information and controls over the state of the parsing process
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getHeaders
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getColumnValuesAsList
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putColumnValuesInMapOfNames
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putColumnValuesInMapOfIndexes
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getColumnValuesAsMapOfNames
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getColumnValuesAsMapOfIndexes
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getColumn
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getColumn
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getColumn
Returns the values of a given column.- Type Parameters:
V
- the type of data in that column- Parameters:
columnName
- the name of the column in the input.columnType
- the type of data in that column- Returns:
- a list with all data stored in the given column
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getColumn
Returns the values of a given column.- Type Parameters:
V
- the type of data in that column- Parameters:
columnIndex
- the position of the column in the input (0-based).columnType
- the type of data in that column- Returns:
- a list with all data stored in the given column
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getRowsPerBatch
public int getRowsPerBatch() -
getBatchesProcessed
public int getBatchesProcessed() -
batchProcessed
public abstract void batchProcessed(int rowsInThisBatch)
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