org.apache.drill.exec.vector.accessor.writer

Enum WriterEvents.State

java.lang.Object

java.lang.Enum<WriterEvents.State>

org.apache.drill.exec.vector.accessor.writer.WriterEvents.State

All Implemented Interfaces:

Serializable, Comparable<WriterEvents.State>

Enclosing interface:

WriterEvents

public static enum WriterEvents.State
extends Enum<WriterEvents.State>

Tracks the write state of a tuple or variant to allow applying the correct operations to newly-added columns to synchronize them with the rest of the writers.

Enum Constant Summary

Enum Constants

Enum Constant and Description
IDLE No write is in progress.
IN_ROW Both startWrite() and startValue() has been called on the tuple to prepare for writing values, and both must be called on newly-added vectors.
IN_WRITE startWrite() has been called to start a write operation (start a batch), but startValue() has not yet been called to start a row (or value within an array).

Method Summary

Modifier and Type	Method and Description
static WriterEvents.State	valueOf(String name) Returns the enum constant of this type with the specified name.
static WriterEvents.State[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

IDLE

public static final WriterEvents.State IDLE

No write is in progress. Nothing need be done to newly-added writers.

IN_WRITE

public static final WriterEvents.State IN_WRITE

startWrite() has been called to start a write operation (start a batch), but startValue() has not yet been called to start a row (or value within an array). startWrite() must be called on newly added columns.

IN_ROW

public static final WriterEvents.State IN_ROW

Both startWrite() and startValue() has been called on the tuple to prepare for writing values, and both must be called on newly-added vectors.

Method Detail

values

public static WriterEvents.State[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (WriterEvents.State c : WriterEvents.State.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static WriterEvents.State valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null