org.kitesdk.morphline.hadoop.rcfile

Class ReadRCFileBuilder

java.lang.Object

org.kitesdk.morphline.hadoop.rcfile.ReadRCFileBuilder

All Implemented Interfaces:

CommandBuilder

public final class ReadRCFileBuilder
extends Object
implements CommandBuilder

Command for reading Record Columnar (RC) Files. RCFile can be read in two ways 1. Row Wise - Emits one record for every row in the RCFile, with columns mapped with names as provided in the column map 2. Column Wise - For every row split (block) in the RC File, Emits one record for each column with all the row values for that column as a List For a RCFile with n rows and m columns. Row wise would emit n records and Column wise would emit m * (row splits) records. De-Compression is handled automatically

Field Summary

Fields

Modifier and Type	Field and Description
static String	OUTPUT_MEDIA_TYPE
static String	RC_FILE_META_DATA

Constructor Summary

Constructors

Constructor and Description
ReadRCFileBuilder()

Method Summary

Methods

Modifier and Type	Method and Description
Command	build(com.typesafe.config.Config config, Command parent, Command child, MorphlineContext context) Creates and returns a command rooted at the given morphline JSON config.
Collection<String>	getNames() Returns the names with which this command can be invoked.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

OUTPUT_MEDIA_TYPE

public static final String OUTPUT_MEDIA_TYPE

See Also:

Constant Field Values

RC_FILE_META_DATA

public static final String RC_FILE_META_DATA

See Also:

Constant Field Values

Constructor Detail

ReadRCFileBuilder

public ReadRCFileBuilder()

Method Detail

getNames

public Collection<String> getNames()

Description copied from interface: CommandBuilder

Returns the names with which this command can be invoked. The returned set can contain synonyms to enable backwards compatible name changes.

Specified by:

getNames in interface CommandBuilder

build

public Command build(com.typesafe.config.Config config,
            Command parent,
            Command child,
            MorphlineContext context)

Description copied from interface: CommandBuilder

Creates and returns a command rooted at the given morphline JSON config. The command will feed records into child. The command will have parent as it's parent. Additional parameters can be passed via the morphline context.

Specified by:

build in interface CommandBuilder