com.communote.server.model.user.note

Class UserNoteEntityHelper

java.lang.Object

com.communote.server.model.user.note.UserNoteEntityHelper

public final class UserNoteEntityHelper
extends Object

Helper class for the user note entity. It provides methods for converting the rank from a numeric value in the range of 0..1 to an integer. The integer is then used for storing it in the databse. The main reason for using an integer in databse instead of a floating point numeric is to provide better support for indexing and filtering.

Author:

Communote GmbH - http://www.communote.com/

Field Summary

Fields

Modifier and Type	Field and Description
static int	RANK_PRECISION The rank precision is used to convert a normalized rank ( a value between 0 and 1) to an integer by multiplicating it with this precision.

Method Summary

Modifier and Type	Method and Description
static boolean	checkValidRank(int rank)
static int	convertNormalizedRank(double normalizedRank) Converts the normalized rank to an integer
static double	convertToNormalizedRank(int rank) Convert the rank back to a normalized rank

Methods inherited from class java.lang.Object

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

Field Detail

RANK_PRECISION

public static final int RANK_PRECISION

The rank precision is used to convert a normalized rank ( a value between 0 and 1) to an integer by multiplicating it with this precision.

See Also:

Constant Field Values

Method Detail

checkValidRank

public static boolean checkValidRank(int rank)

Parameters:

rank - the rank to check

Returns:

true if the rank is in range

convertNormalizedRank

public static int convertNormalizedRank(double normalizedRank)

Converts the normalized rank to an integer

Parameters:

normalizedRank - the normalized rank

Returns:

the value transformed to an integer

convertToNormalizedRank

public static double convertToNormalizedRank(int rank)

Convert the rank back to a normalized rank

Parameters:

rank - the rank

Returns:

the normalized rank as a value between 0..1