com.jalios.jcms

Class QueryResultSet.ScoreComparator<T extends Publication>

java.lang.Object

com.jalios.jstore.BasicStorable.CdateComparator<T>

com.jalios.jcms.comparator.BasicComparator<T>

com.jalios.jcms.QueryResultSet.ScoreComparator<T>

Type Parameters:

T - the type

All Implemented Interfaces:

java.util.Comparator<T>

Enclosing class:

QueryResultSet

public static class QueryResultSet.ScoreComparator<T extends Publication>
extends BasicComparator<T>

This Comparator compares two Objects using a score retrieved from a map of Object to float.
If two Storable have the same score, a "parent" compararator is used, default "parent" comparator is MdateComparator.
Note: because a high score must be first, it behaves in the opposite way of what Comparator says see the compare(Object, Object) method.

Since:

jcms-5.5.0

Version:

$Revision: 83128 $

Author:

Olivier Jaquemet

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	PARENT_COMPARATOR
static java.lang.String	QUERY_RESULT_SET

Fields inherited from class com.jalios.jcms.comparator.BasicComparator

channel, contextMap, jcmsContext, language, locale

Constructor Summary

Constructors

Constructor and Description
ScoreComparator() Initialize a ScoreComparator from the contextual information retrieved through ComparatorManager parameter
ScoreComparator(QueryResultSet resultSet, java.util.Comparator parentComparator) Initialize a ScoreComparator using the given parent Comparator, if null, default with MdateComparator.

Method Summary

Modifier and Type	Method and Description
int	compare(T o1, T o2) Compare two Object using their score from the QueryResulSet.

Methods inherited from class com.jalios.jstore.BasicStorable.CdateComparator

compareDate

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Comparator

comparing, comparing, comparingDouble, comparingInt, comparingLong, equals, naturalOrder, nullsFirst, nullsLast, reversed, reverseOrder, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Field Detail

PARENT_COMPARATOR

public static final java.lang.String PARENT_COMPARATOR

See Also:

Constant Field Values

QUERY_RESULT_SET

public static final java.lang.String QUERY_RESULT_SET

See Also:

Constant Field Values

Constructor Detail

ScoreComparator

public ScoreComparator()

Initialize a ScoreComparator from the contextual information retrieved through ComparatorManager parameter

• A parent Comparator, is retrieved using attribute PARENT_COMPARATOR, if null, default with MdateComparator.
• The QueryResultSet, is retrieved using attribute QUERY_RESULT_SET, must not be null.

Throws:

java.lang.IllegalArgumentException - if QueryResultSet is null

ScoreComparator

public ScoreComparator(QueryResultSet resultSet,
                       java.util.Comparator parentComparator)

Initialize a ScoreComparator using the given parent Comparator, if null, default with MdateComparator.

Parameters:

resultSet - the QueryResultSet from which to retrieve score of each Publication.

parentComparator - the Comparator to use when score of compared Object are identical.

Throws:

java.lang.IllegalArgumentException - if QueryResultSet is null

Method Detail

compare

public int compare(T o1,
                   T o2)

Compare two Object using their score from the QueryResulSet. If score are equals, use the parent Comparator.

Specified by:

compare in interface java.util.Comparator<T extends Publication>

Overrides:

compare in class BasicStorable.CdateComparator<T extends Publication>

Returns:

1 when o1 has a lower score than o2, -1 when has o1 higher score than o2 and returns parentComparator.compare value when scores are equals.