Class AbstractObjectColumnProcessor<T extends Context>
- java.lang.Object
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- com.univocity.parsers.common.DefaultConversionProcessor
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- com.univocity.parsers.common.processor.core.AbstractObjectProcessor<T>
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- com.univocity.parsers.common.processor.core.AbstractObjectColumnProcessor<T>
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- All Implemented Interfaces:
ConversionProcessor
,Processor<T>
- Direct Known Subclasses:
ObjectColumnProcessor
public abstract class AbstractObjectColumnProcessor<T extends Context> extends AbstractObjectProcessor<T>
AProcessor
implementation for converting rows extracted from any implementation ofAbstractParser
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()
andgetColumnValuesAsMapOfNames()
.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
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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
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Method Summary
All Methods Instance Methods Concrete Methods 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
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Methods inherited from class com.univocity.parsers.common.DefaultConversionProcessor
applyConversions, convertAll, convertFields, convertIndexes, convertType, handleConversionError, initializeConversions, reverseConversions, toDataProcessingException
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Constructor Detail
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AbstractObjectColumnProcessor
public AbstractObjectColumnProcessor()
Constructs a column processor, pre-allocating room for 1000 rows.
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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
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Method Detail
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getHeaders
public final java.lang.String[] getHeaders()
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getColumnValuesAsList
public final java.util.List<java.util.List<java.lang.Object>> getColumnValuesAsList()
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putColumnValuesInMapOfNames
public final void putColumnValuesInMapOfNames(java.util.Map<java.lang.String,java.util.List<java.lang.Object>> map)
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putColumnValuesInMapOfIndexes
public final void putColumnValuesInMapOfIndexes(java.util.Map<java.lang.Integer,java.util.List<java.lang.Object>> map)
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getColumnValuesAsMapOfNames
public final java.util.Map<java.lang.String,java.util.List<java.lang.Object>> getColumnValuesAsMapOfNames()
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getColumnValuesAsMapOfIndexes
public final java.util.Map<java.lang.Integer,java.util.List<java.lang.Object>> getColumnValuesAsMapOfIndexes()
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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 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
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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 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
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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
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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
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getColumn
public java.util.List<java.lang.Object> getColumn(java.lang.String columnName)
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getColumn
public java.util.List<java.lang.Object> getColumn(int columnIndex)
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