public abstract class AbstractObjectColumnProcessor<T extends Context> extends AbstractObjectProcessor<T>
Processor
implementation for converting 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.
At the end of the process, the user can access the lists with values parsed for all columns using the methods getColumnValuesAsList()
,
getColumnValuesAsMapOfIndexes()
and getColumnValuesAsMapOfNames()
.
Note: Storing the values of all columns may be memory intensive. For large inputs, use a AbstractBatchedObjectColumnProcessor
instead
AbstractParser
,
Processor
,
ColumnReader
,
Conversion
,
AbstractObjectProcessor
Constructor and Description |
---|
AbstractObjectColumnProcessor()
Constructs a column processor, pre-allocating room for 1000 rows.
|
AbstractObjectColumnProcessor(int expectedRowCount)
Constructs a column processor pre-allocating room for the expected number of rows to be processed
|
Modifier and Type | Method and Description |
---|---|
List<Object> |
getColumn(int columnIndex)
Returns the values of a given column.
|
<V> List<V> |
getColumn(int columnIndex,
Class<V> columnType)
Returns the values of a given column.
|
List<Object> |
getColumn(String columnName)
Returns the values of a given column.
|
<V> List<V> |
getColumn(String columnName,
Class<V> columnType)
Returns the values of a given column.
|
List<List<Object>> |
getColumnValuesAsList()
Returns the values processed for each column
|
Map<Integer,List<Object>> |
getColumnValuesAsMapOfIndexes()
Returns a map of column indexes and their respective list of values parsed from the input.
|
Map<String,List<Object>> |
getColumnValuesAsMapOfNames()
Returns a map of column names and their respective list of values parsed from the input.
|
String[] |
getHeaders()
Returns the column headers.
|
void |
processStarted(T context)
This method will by invoked by the parser once, when it is ready to start processing the input.
|
void |
putColumnValuesInMapOfIndexes(Map<Integer,List<Object>> map)
Fills a given map associating each column index to its list of values
|
void |
putColumnValuesInMapOfNames(Map<String,List<Object>> map)
Fills a given map associating each column name to its list o values
|
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.
|
processEnded, rowProcessed
applyConversions, convertAll, convertFields, convertIndexes, convertType, handleConversionError, initializeConversions, reverseConversions, toDataProcessingException
public AbstractObjectColumnProcessor()
public AbstractObjectColumnProcessor(int expectedRowCount)
expectedRowCount
- the expected number of rows to be processedpublic final String[] getHeaders()
CommonSettings.getHeaders()
or the headers parsed in
the input when CommonSettings.getHeaders()
equals to true
public final List<List<Object>> getColumnValuesAsList()
public final void putColumnValuesInMapOfNames(Map<String,List<Object>> map)
map
- the map to hold the values of each columnpublic final void putColumnValuesInMapOfIndexes(Map<Integer,List<Object>> map)
map
- the map to hold the values of each columnpublic final Map<String,List<Object>> getColumnValuesAsMapOfNames()
public final Map<Integer,List<Object>> getColumnValuesAsMapOfIndexes()
public void rowProcessed(Object[] row, T context)
AbstractObjectProcessor
rowProcessed
in class AbstractObjectProcessor<T extends Context>
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 processpublic void processStarted(T context)
Processor
processStarted
in interface Processor<T extends Context>
processStarted
in class AbstractObjectProcessor<T extends Context>
context
- A contextual object with information and controls over the current state of the parsing processpublic <V> List<V> getColumn(String columnName, Class<V> columnType)
V
- the type of data in that columncolumnName
- the name of the column in the input.columnType
- the type of data in that columnpublic <V> List<V> getColumn(int columnIndex, Class<V> columnType)
V
- the type of data in that columncolumnIndex
- the position of the column in the input (0-based).columnType
- the type of data in that columnpublic List<Object> getColumn(String columnName)
columnName
- the name of the column in the input.Copyright © 2024 uniVocity Software Pty Ltd. All rights reserved.