com.helger.commons.id

Class ComparatorHasID<IDTYPE,DATATYPE extends IHasID<IDTYPE>>

java.lang.Object

com.helger.commons.compare.AbstractComparator<DATATYPE>

com.helger.commons.compare.AbstractPartComparator<DATATYPE,IDTYPE>

com.helger.commons.id.ComparatorHasID<IDTYPE,DATATYPE>

Type Parameters:

IDTYPE - The type of the ID

DATATYPE - The type of elements to be compared.

All Implemented Interfaces:

ISerializableComparator<DATATYPE>, Serializable, Comparator<DATATYPE>

Direct Known Subclasses:

ComparatorTreeItemID

@NotThreadSafe
public class ComparatorHasID<IDTYPE,DATATYPE extends IHasID<IDTYPE>>
extends AbstractPartComparator<DATATYPE,IDTYPE>

This is a Comparator for objects that implement the IHasID interface with a class that does NOT implements Comparable.

Author:

Philip Helger

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ComparatorHasID(Comparator<? super IDTYPE> aIDComparator) Comparator with default sort order and no nested comparator.

Method Summary

Modifier and Type	Method and Description
protected IDTYPE	getPart(DATATYPE aObject) Implement this method to extract the part to compare from the original object.

Methods inherited from class com.helger.commons.compare.AbstractPartComparator

getPartComparator, mainCompare, toString

Methods inherited from class com.helger.commons.compare.AbstractComparator

compare, getNestedComparator, getSortOrder, isNullValuesComeFirst, setNestedComparator, setNullValuesComeFirst, setSortOrder

Methods inherited from class java.lang.Object

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

Constructor Detail

ComparatorHasID

public ComparatorHasID(@Nonnull
                       Comparator<? super IDTYPE> aIDComparator)

Comparator with default sort order and no nested comparator.

Parameters:

aIDComparator - The comparator for comparing the IDs. May not be null.

Method Detail

getPart

@Nonnull
protected IDTYPE getPart(@Nonnull
                                   DATATYPE aObject)

Description copied from class: AbstractPartComparator

Implement this method to extract the part to compare from the original object.

Specified by:

getPart in class AbstractPartComparator<DATATYPE extends IHasID<IDTYPE>,IDTYPE>

Parameters:

aObject - The object to be compared. Never null.

Returns:

The part of the source object to be compared with the part comparator provided in the constructor. May be null.