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:

  • Constructor Details

    • 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 Details

    • getHeaders

      public final String[] getHeaders()

    • getColumnValuesAsList

      public final List<List<Object>> getColumnValuesAsList()

    • putColumnValuesInMapOfNames

      public final void putColumnValuesInMapOfNames(Map<String,List<Object>> map)

    • putColumnValuesInMapOfIndexes

      public final void putColumnValuesInMapOfIndexes(Map<Integer,List<Object>> map)

    • getColumnValuesAsMapOfNames

      public final Map<String,List<Object>> getColumnValuesAsMapOfNames()

    • getColumnValuesAsMapOfIndexes

      public final Map<Integer,List<Object>> getColumnValuesAsMapOfIndexes()

    • rowProcessed

      public void rowProcessed(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> List<V> getColumn(String columnName, 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> List<V> getColumn(int columnIndex, 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 List<Object> getColumn(String columnName)

    • getColumn

      public List<Object> getColumn(int columnIndex)