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

Interface Processor<T extends Context>

All Known Subinterfaces:

RowProcessor

All Known Implementing Classes:

AbstractBatchedColumnProcessor, AbstractBatchedObjectColumnProcessor, AbstractBeanListProcessor, AbstractBeanProcessor, AbstractColumnProcessor, AbstractConcurrentProcessor, AbstractInputValueSwitch, AbstractListProcessor, AbstractMasterDetailListProcessor, AbstractMasterDetailProcessor, AbstractMultiBeanListProcessor, AbstractMultiBeanProcessor, AbstractMultiBeanRowProcessor, AbstractObjectColumnProcessor, AbstractObjectListProcessor, AbstractObjectProcessor, AbstractProcessor, AbstractProcessorSwitch, AbstractRowProcessor, BatchedColumnProcessor, BatchedObjectColumnProcessor, BeanListProcessor, BeanProcessor, ColumnProcessor, CompositeProcessor, CompositeRowProcessor, ConcurrentRowProcessor, InputValueSwitch, MasterDetailListProcessor, MasterDetailProcessor, MultiBeanListProcessor, MultiBeanProcessor, MultiBeanRowProcessor, NoopProcessor, NoopRowProcessor, ObjectColumnProcessor, ObjectRowListProcessor, ObjectRowProcessor, RowListProcessor, RowProcessorSwitch

public interface Processor<T extends Context>

The essential callback interface to handle records parsed by any parser that extends AbstractParser.

When parsing an input, univocity-parsers will obtain the RowProcessor from CommonParserSettings.getRowProcessor(), and delegate each parsed row to rowProcessed(String[], Context).

Before parsing the first row, the parser will invoke the processStarted(Context) method. By this time the input buffer will be already loaded and ready to be consumed.

After parsing the last row, all resources are closed and the processing stops. Only after the processEnded(Context) is called so you can perform any additional housekeeping you might need.

More control and information over the parsing process are provided by the Context object.

univocity-parsers provides many useful default implementations of this interface in the package com.univocity.parsers.common.processor, namely:

• RowListProcessor: convenience class for storing the processed rows into a list.
• ObjectRowProcessor: used for processing rows and executing conversions of parsed values to objects using instances of Conversion
• ObjectRowListProcessor: convenience class for rows of converted objects using ObjectRowProcessor into a list.
• AbstractMasterDetailProcessor: used for reading inputs where records are organized in a master-detail fashion (with a master element that contains a list of associated elements)
• AbstractMasterDetailListProcessor: convenience class for storing MasterDetailRecord created by instances created by AbstractMasterDetailProcessor into a list
• AbstractBeanProcessor: used for automatically create and populate javabeans annotated with the annotations provided in package com.univocity.parsers.annotations
• AbstractBeanListProcessor: convenience class for storing all javabeans created by AbstractBeanProcessor into a list

Author:

Univocity Software Pty Ltd - parsers@univocity.com

See Also:

AbstractParser, CommonParserSettings, ParsingContext, Context

Method Summary

Modifier and Type	Method	Description
void	processEnded(T context)	This method will by invoked by the parser once, after the parsing process stopped and all resources were closed.
void	processStarted(T context)	This method will by invoked by the parser once, when it is ready to start processing the input.
void	rowProcessed(java.lang.String[] row, T context)	Invoked by the parser after all values of a valid record have been processed.

Method Detail

processStarted

void processStarted(T context)

This method will by invoked by the parser once, when it is ready to start processing the input.

Parameters:

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

rowProcessed

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

Invoked by the parser after all values of a valid record have been processed.

Parameters:

row - the data extracted by the parser for an individual record. Note that:

• it will never by null.
• it will never be empty unless explicitly configured using CommonSettings.setSkipEmptyLines(boolean)
• it won't contain lines identified by the parser as comments. To disable comment processing set Format.setComment(char) to '\0'

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

processEnded

void processEnded(T context)

This method will by invoked by the parser once, after the parsing process stopped and all resources were closed.

It will always be called by the parser: in case of errors, if the end of the input us reached, or if the user stopped the process manually using Context.stop().

Parameters:

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