com.ibm.websphere.fabric.da.types
Class Score
java.lang.Object
com.ibm.websphere.fabric.da.types.Score
- All Implemented Interfaces:
- java.io.Serializable, java.lang.Comparable
public abstract class Score
- extends java.lang.Object
- implements java.lang.Comparable, java.io.Serializable
Represents a score, usually that of a fuzzy match. All concrete subclasses of
score must implement asDouble()
so that multiple instances of the
same type may be managed by DA algorithms. These types may provide other methods
that give further details of the score and perhaps even details of the
derivation of the score.
The units of score values are left entirely to the implementation, but the
scale is between 0 and 1.
Instances of this type are immutable, and therefore thread-safe.
Scores, while comparable, do not implement meaningful Object.equals(Object)
and Object.hashCode()
. Thus, they are not intended to be used as keys
of hash-based maps.
- Since:
- WBSF 6.0.2
- Version:
- $Id: $
- Author:
- dranatunga
- See Also:
- Serialized Form
Field Summary |
static float |
EPSILON
Deprecated. use the double precision version, EPSILON_AS_DOUBLE. Using this version
in mathematical operations with double precision values may result in undesired
loss of precision.
The precision below which differences in scores are considered negligible. |
static double |
EPSILON_AS_DOUBLE
|
Constructor Summary |
Score()
|
Method Summary |
double |
asDouble()
|
int |
compareTo(java.lang.Object obj)
|
abstract float |
getScore()
Deprecated. use of float frequently incurs loss of precision for standard numerical comparisons that
DAs are interested in. Use asDouble() instead. |
java.lang.String |
toString()
|
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
EPSILON
public static final float EPSILON
- Deprecated. use the double precision version, EPSILON_AS_DOUBLE. Using this version
in mathematical operations with double precision values may result in undesired
loss of precision.
The precision below which differences in scores are considered negligible.
- See Also:
- Constant Field Values
EPSILON_AS_DOUBLE
public static final double EPSILON_AS_DOUBLE
- See Also:
- Constant Field Values
Score
public Score()
getScore
public abstract float getScore()
- Deprecated. use of float frequently incurs loss of precision for standard numerical comparisons that
DAs are interested in. Use
asDouble()
instead.
- Returns:
- a score between
0.0f
and 1.0f
inclusive.
asDouble
public double asDouble()
- Returns:
- the result of
getScore()
coerced to a double. Subsclasses that desire
alternate behavior with a higher level of precision are expected to override this method. - Since:
- WBSF 6.1.0
toString
public java.lang.String toString()
- Overrides:
toString
in class java.lang.Object
compareTo
public int compareTo(java.lang.Object obj)
- Specified by:
compareTo
in interface java.lang.Comparable
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