ConversionProcessor
, Processor<T>
ObjectColumnProcessor
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 | 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 | Description |
---|---|---|
java.util.List<java.lang.Object> |
getColumn(int columnIndex) |
|
<V> java.util.List<V> |
getColumn(int columnIndex,
java.lang.Class<V> columnType) |
Returns the values of a given column.
|
java.util.List<java.lang.Object> |
getColumn(java.lang.String columnName) |
|
<V> java.util.List<V> |
getColumn(java.lang.String columnName,
java.lang.Class<V> columnType) |
Returns the values of a given column.
|
java.util.List<java.util.List<java.lang.Object>> |
getColumnValuesAsList() |
|
java.util.Map<java.lang.Integer,java.util.List<java.lang.Object>> |
getColumnValuesAsMapOfIndexes() |
|
java.util.Map<java.lang.String,java.util.List<java.lang.Object>> |
getColumnValuesAsMapOfNames() |
|
java.lang.String[] |
getHeaders() |
|
void |
processStarted(T context) |
This method will by invoked by the parser once, when it is ready to start processing the input.
|
void |
putColumnValuesInMapOfIndexes(java.util.Map<java.lang.Integer,java.util.List<java.lang.Object>> map) |
|
void |
putColumnValuesInMapOfNames(java.util.Map<java.lang.String,java.util.List<java.lang.Object>> map) |
|
void |
rowProcessed(java.lang.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 java.lang.String[] getHeaders()
public final java.util.List<java.util.List<java.lang.Object>> getColumnValuesAsList()
public final void putColumnValuesInMapOfNames(java.util.Map<java.lang.String,java.util.List<java.lang.Object>> map)
public final void putColumnValuesInMapOfIndexes(java.util.Map<java.lang.Integer,java.util.List<java.lang.Object>> map)
public final java.util.Map<java.lang.String,java.util.List<java.lang.Object>> getColumnValuesAsMapOfNames()
public final java.util.Map<java.lang.Integer,java.util.List<java.lang.Object>> getColumnValuesAsMapOfIndexes()
public void rowProcessed(java.lang.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> java.util.List<V> getColumn(java.lang.String columnName, java.lang.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> java.util.List<V> getColumn(int columnIndex, java.lang.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 java.util.List<java.lang.Object> getColumn(java.lang.String columnName)
public java.util.List<java.lang.Object> getColumn(int columnIndex)