Package org.alfresco.repo.query

Class AbstractQNameAwareCannedQueryFactory.PropertyBasedComparator<R>

java.lang.Object

org.alfresco.repo.query.AbstractQNameAwareCannedQueryFactory.PropertyBasedComparator<R>

All Implemented Interfaces:

Comparator<R>

Direct Known Subclasses:

AbstractBlogPostsCannedQueryFactory.BlogEntityComparator, AbstractQNameAwareCannedQueryFactory.NodeBackedEntityComparator, GetCalendarEntriesCannedQuery.CalendarEntityComparator

Enclosing class:

AbstractQNameAwareCannedQueryFactory<R>

public abstract static class AbstractQNameAwareCannedQueryFactory.PropertyBasedComparator<R>
extends Object
implements Comparator<R>

Utility class to sort Entities on the basis of a Comparable property. Comparisons of two null properties are considered 'equal' by this comparator. Comparisons involving one null and one non-null property will return the null property as being 'before' the non-null property. Note that it is the responsibility of the calling code to ensure that the specified property values actually implement Comparable themselves.

Field Summary

Fields

Modifier and Type	Field	Description
protected org.alfresco.service.namespace.QName	comparableProperty

Constructor Summary

Constructors

Constructor	Description
PropertyBasedComparator(org.alfresco.service.namespace.QName comparableProperty)

Method Summary

Modifier and Type	Method	Description
int	compare(R r1, R r2)
protected abstract Comparable	getProperty(R entity)

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

equals, reversed, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Field Detail

comparableProperty

protected org.alfresco.service.namespace.QName comparableProperty

Constructor Detail

PropertyBasedComparator

public PropertyBasedComparator(org.alfresco.service.namespace.QName comparableProperty)

Method Detail

getProperty

protected abstract Comparable getProperty(R entity)

compare

public int compare(R r1,
                   R r2)

Specified by:

compare in interface Comparator<R>