CSVProcessor Class Reference

Collaboration diagram for CSVProcessor:

Classes
class	Statistics

Static Public Member Functions
static void	main (String[] args)

Static Private Member Functions
static String	getCell (String record, int column)
static int	getColumnNumber (List< String > header, String name)
static void	printUsageAndExit (String... str)
static void	statInSeveralPasses (BufferedReader br, int column) throws IOException
static void	verifyArgumentNumber (String[] args, int n)

Static Private Attributes
static final int	READ_AHEAD_LIMIT = 100_000_000

Detailed Description

CSVProcessor is a tool for processing CSV files. There are several command-line options. Consult the printUsageAndExit method for instructions and command line parameters. This sample shows examples of the following features:

• Lambda and bulk operations. Working with streams: map(...), filter(...), sorted(...) methods. The collect(...) method with different collectors: Collectors.maxBy(...), Collectors.minBy(...), Collectors.toList(), Collectors.toCollection(...), Collectors.groupingBy(...), Collectors.toDoubleSummaryStatistics(...), and a custom Collector.
• Static method reference for printing values.
• Try-with-resources feature for closing files.
• Switch by String feature.
• Other new APIs: Pattern.asPredicate(), BinaryOperator BufferedReader.lines(), Collection.forEach(...), Comparator.comparing(...), Comparator.reversed(), Arrays.stream(...).

Definition at line 73 of file CSVProcessor.java.

Member Function Documentation

getCell()

static String CSVProcessor.getCell ( String  record, int  column  )

staticprivate

Definition at line 225 of file CSVProcessor.java.

Referenced by CSVProcessor.Statistics.accept(), main(), statInSeveralPasses(), and CSVProcessor.Statistics.Statistics().

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getColumnNumber()

static int CSVProcessor.getColumnNumber ( List< String >  header, String  name  )

staticprivate

Definition at line 217 of file CSVProcessor.java.

References name(), and printUsageAndExit().

Referenced by main().

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main()

static void CSVProcessor.main ( String[]  args )

static

The main method for the CSVProcessor program. Run the program with an empty argument list to see possible arguments.

Parameters

args	the argument list for CSVProcessor.

Definition at line 84 of file CSVProcessor.java.

References getCell(), getColumnNumber(), printUsageAndExit(), READ_AHEAD_LIMIT, statInSeveralPasses(), and verifyArgumentNumber().

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printUsageAndExit()

static void CSVProcessor.printUsageAndExit ( String...  str )

staticprivate

Definition at line 229 of file CSVProcessor.java.

Referenced by getColumnNumber(), main(), and verifyArgumentNumber().

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statInSeveralPasses()

static void CSVProcessor.statInSeveralPasses ( BufferedReader  br, int  column  ) throws IOException

staticprivate

Definition at line 186 of file CSVProcessor.java.

References getCell().

Referenced by main().

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verifyArgumentNumber()

static void CSVProcessor.verifyArgumentNumber ( String[]  args, int  n  )

staticprivate

Definition at line 210 of file CSVProcessor.java.

References printUsageAndExit().

Referenced by main().

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Member Data Documentation

READ_AHEAD_LIMIT

final int CSVProcessor.READ_AHEAD_LIMIT = 100_000_000

staticprivate

Definition at line 76 of file CSVProcessor.java.

Referenced by main().

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The documentation for this class was generated from the following file:

• build/windows-installer/unpacked/java-se-8u41-ri/sample/lambda/BulkDataOperations/src/CSVProcessor.java