Package com.couchbase.client.java.kv

Enum ScanSort

java.lang.Object

java.lang.Enum<ScanSort>

com.couchbase.client.java.kv.ScanSort

All Implemented Interfaces:

Serializable, Comparable<ScanSort>

@Volatile
public enum ScanSort
extends Enum<ScanSort>

The sorting used for the scan operation.

Enum Constant Summary

Enum Constants

Enum Constant	Description
ASCENDING	Sort the results by document ID in lexicographic order.
NONE	Do not sort the results.

Method Summary

Modifier and Type	Method	Description
CoreRangeScanSort	intoCore()
static ScanSort	valueOf(String name)	Returns the enum constant of this type with the specified name.
static ScanSort[]	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

NONE

public static final ScanSort NONE

Do not sort the results.

Fast and efficient. Results are emitted in the order they arrive from each partition.

ASCENDING

public static final ScanSort ASCENDING

Sort the results by document ID in lexicographic order.

Reasonably efficient. Suitable for large range scans, since it *does not* require buffering the entire result set in memory.

CAVEAT: When used with a ScanType.samplingScan(long) scan, the behavior is unspecified and may change in a future version. Likely outcomes include:

• Skewing the results towards "low" document IDs.
• Not actually sorting.

If you require sorted results from a sample scan, please use NONE, then collect the results into a list and sort the list.

Method Detail

values

public static ScanSort[] 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 (ScanSort c : ScanSort.values())
    System.out.println(c);

Returns:

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

valueOf

public static ScanSort 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

intoCore

@Internal
public CoreRangeScanSort intoCore()