org.kitesdk.morphline.stdlib
Class HeadBuilder

java.lang.Object
  org.kitesdk.morphline.stdlib.HeadBuilder

All Implemented Interfaces:

CommandBuilder

public final class HeadBuilder
extends Object
implements CommandBuilder

Command that ignores all input records beyond the N-th record, thus emitting at most N records, akin to the Unix head command. This can be helpful to quickly test a morphline with the first few records from a larger dataset.

Constructor Summary

HeadBuilder()

Method Summary

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

Constructor Detail

HeadBuilder

public HeadBuilder()

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