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
,ColumnReader<java.lang.Object>
,Processor<T>
- Direct Known Subclasses:
ObjectColumnProcessor
public abstract class AbstractObjectColumnProcessor<T extends Context> extends AbstractObjectProcessor<T> implements ColumnReader<java.lang.Object>
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- See Also:
AbstractParser
,Processor
,ColumnReader
,Conversion
,AbstractObjectProcessor
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Field Summary
Fields Modifier and Type Field Description private ColumnSplitter<java.lang.Object>
splitter
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Fields inherited from class com.univocity.parsers.common.DefaultConversionProcessor
conversions
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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)
Returns the values of a given column.<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)
Returns the values of a given column.<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()
Returns the values processed for each columnjava.util.Map<java.lang.Integer,java.util.List<java.lang.Object>>
getColumnValuesAsMapOfIndexes()
Returns a map of column indexes and their respective list of values parsed from the input.java.util.Map<java.lang.String,java.util.List<java.lang.Object>>
getColumnValuesAsMapOfNames()
Returns a map of column names and their respective list of values parsed from the input.java.lang.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(java.util.Map<java.lang.Integer,java.util.List<java.lang.Object>> map)
Fills a given map associating each column index to its list of valuesvoid
putColumnValuesInMapOfNames(java.util.Map<java.lang.String,java.util.List<java.lang.Object>> map)
Fills a given map associating each column name to its list o valuesvoid
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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Field Detail
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splitter
private final ColumnSplitter<java.lang.Object> splitter
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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()
Description copied from interface:ColumnReader
Returns the column headers. This can be either the headers defined inCommonSettings.getHeaders()
or the headers parsed in the input whenCommonSettings.getHeaders()
equals totrue
- Specified by:
getHeaders
in interfaceColumnReader<T extends Context>
- Returns:
- the headers of all column parsed.
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getColumnValuesAsList
public final java.util.List<java.util.List<java.lang.Object>> getColumnValuesAsList()
Description copied from interface:ColumnReader
Returns the values processed for each column- Specified by:
getColumnValuesAsList
in interfaceColumnReader<T extends Context>
- Returns:
- a list of lists. The stored lists correspond to the position of the column processed from the input; Each list contains the corresponding values parsed for a column, across multiple rows.
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putColumnValuesInMapOfNames
public final void putColumnValuesInMapOfNames(java.util.Map<java.lang.String,java.util.List<java.lang.Object>> map)
Description copied from interface:ColumnReader
Fills a given map associating each column name to its list o values- Specified by:
putColumnValuesInMapOfNames
in interfaceColumnReader<T extends Context>
- Parameters:
map
- the map to hold the values of each column
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putColumnValuesInMapOfIndexes
public final void putColumnValuesInMapOfIndexes(java.util.Map<java.lang.Integer,java.util.List<java.lang.Object>> map)
Description copied from interface:ColumnReader
Fills a given map associating each column index to its list of values- Specified by:
putColumnValuesInMapOfIndexes
in interfaceColumnReader<T extends Context>
- Parameters:
map
- the map to hold the values of each column
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getColumnValuesAsMapOfNames
public final java.util.Map<java.lang.String,java.util.List<java.lang.Object>> getColumnValuesAsMapOfNames()
Description copied from interface:ColumnReader
Returns a map of column names and their respective list of values parsed from the input.- Specified by:
getColumnValuesAsMapOfNames
in interfaceColumnReader<T extends Context>
- Returns:
- a map of column names and their respective list of values.
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getColumnValuesAsMapOfIndexes
public final java.util.Map<java.lang.Integer,java.util.List<java.lang.Object>> getColumnValuesAsMapOfIndexes()
Description copied from interface:ColumnReader
Returns a map of column indexes and their respective list of values parsed from the input.- Specified by:
getColumnValuesAsMapOfIndexes
in interfaceColumnReader<T extends Context>
- Returns:
- a map of column indexes and their respective list of values.
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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)
Description copied from interface:ColumnReader
Returns the values of a given column.- Specified by:
getColumn
in interfaceColumnReader<T extends Context>
- Parameters:
columnName
- the name of the column in the input.- Returns:
- a list with all data stored in the given column
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getColumn
public java.util.List<java.lang.Object> getColumn(int columnIndex)
Description copied from interface:ColumnReader
Returns the values of a given column.- Specified by:
getColumn
in interfaceColumnReader<T extends Context>
- Parameters:
columnIndex
- the position of the column in the input (0-based).- Returns:
- a list with all data stored in the given column
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