Package com.univocity.parsers.common.processor.core

Class AbstractObjectColumnProcessor<T extends Context>

java.lang.Object

com.univocity.parsers.common.DefaultConversionProcessor

com.univocity.parsers.common.processor.core.AbstractObjectProcessor<T>

com.univocity.parsers.common.processor.core.AbstractObjectColumnProcessor<T>

All Implemented Interfaces:

ConversionProcessor, Processor<T>

Direct Known Subclasses:

ObjectColumnProcessor

public abstract class AbstractObjectColumnProcessor<T extends Context>
extends AbstractObjectProcessor<T>

A 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

Author:

Univocity Software Pty Ltd - parsers@univocity.com

See Also:

AbstractParser, Processor, ColumnReader, Conversion, AbstractObjectProcessor

Field Summary

Fields inherited from class com.univocity.parsers.common.DefaultConversionProcessor

conversions

Constructor Summary

Constructors

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

Method Summary

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.

Methods inherited from class com.univocity.parsers.common.processor.core.AbstractObjectProcessor

processEnded, 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

Constructor Detail

AbstractObjectColumnProcessor

public AbstractObjectColumnProcessor()

Constructs a column processor, pre-allocating room for 1000 rows.

AbstractObjectColumnProcessor

public AbstractObjectColumnProcessor(int expectedRowCount)

Constructs a column processor pre-allocating room for the expected number of rows to be processed

Parameters:

expectedRowCount - the expected number of rows to be processed

Method Detail

getHeaders

public final java.lang.String[] getHeaders()

getColumnValuesAsList

public final java.util.List<java.util.List<java.lang.Object>> getColumnValuesAsList()

putColumnValuesInMapOfNames

public final void putColumnValuesInMapOfNames(java.util.Map<java.lang.String,java.util.List<java.lang.Object>> map)

putColumnValuesInMapOfIndexes

public final void putColumnValuesInMapOfIndexes(java.util.Map<java.lang.Integer,java.util.List<java.lang.Object>> map)

getColumnValuesAsMapOfNames

public final java.util.Map<java.lang.String,java.util.List<java.lang.Object>> getColumnValuesAsMapOfNames()

getColumnValuesAsMapOfIndexes

public final java.util.Map<java.lang.Integer,java.util.List<java.lang.Object>> getColumnValuesAsMapOfIndexes()

rowProcessed

public void rowProcessed(java.lang.Object[] row,
                         T context)

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 class AbstractObjectProcessor<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

processStarted

public void processStarted(T context)

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 interface Processor<T extends Context>

Overrides:

processStarted in class AbstractObjectProcessor<T extends Context>

Parameters:

context - A contextual object with information and controls over the current state of the parsing process

getColumn

public <V> java.util.List<V> getColumn(java.lang.String columnName,
                                       java.lang.Class<V> columnType)

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

getColumn

public <V> java.util.List<V> getColumn(int columnIndex,
                                       java.lang.Class<V> columnType)

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

getColumn

public java.util.List<java.lang.Object> getColumn(java.lang.String columnName)

getColumn

public java.util.List<java.lang.Object> getColumn(int columnIndex)