de.alpharogroup.comparators

Class ComparatorExtensions

java.lang.Object

de.alpharogroup.comparators.ComparatorExtensions

public final class ComparatorExtensions
extends Object

The class ComparatorExtensions have helper methods for comparators.

Constructor Summary

Constructors

Constructor and Description
ComparatorExtensions()

Method Summary

Modifier and Type	Method and Description
static <T extends Comparable<T>> int	compare(T object, T compareWithObject) Compares the given objects and returns the int value.
static <T extends Comparable<T>> int	compare(T object, T compareWithObject, SortOrder sortOrder) Compares the given objects and returns the int value.
static <T> Boolean	equalNullCheck(T object, T compareWithObject) Null check of the given objects that is intended for use in equals method.
static <T> Integer	nullCheck(T object, T compareWithObject) Checks if one of the given objects are null and returns the value for the Comparator or null if both are not null or if the given objects are not the same Object.
static <T> Integer	nullCheck(T object, T compareWithObject, boolean nullIsGreaterThan) Checks if one of the given objects are null and returns the value for the Comparator or null if both are not null or if the given objects are not the same Object.

Methods inherited from class java.lang.Object

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

Constructor Detail

ComparatorExtensions

public ComparatorExtensions()

Method Detail

compare

public static <T extends Comparable<T>> int compare(T object,
                                                    T compareWithObject)

Compares the given objects and returns the int value.

Type Parameters:

T - the generic type

Parameters:

object - the object

compareWithObject - the object to compare with.

Returns:

the int

compare

public static <T extends Comparable<T>> int compare(T object,
                                                    T compareWithObject,
                                                    SortOrder sortOrder)

Compares the given objects and returns the int value.

Type Parameters:

T - the generic type

Parameters:

object - the object

compareWithObject - the object to compare with.

sortOrder - the sort order

Returns:

the int

equalNullCheck

public static <T> Boolean equalNullCheck(T object,
                                         T compareWithObject)

Null check of the given objects that is intended for use in equals method. Returns the appropriate boolean or null if given objects are ready for equation.

Type Parameters:

T - the generic type

Parameters:

object - the object

compareWithObject - the compare with object

Returns:

the boolean or null if both are not null.

nullCheck

public static <T> Integer nullCheck(T object,
                                    T compareWithObject)

Checks if one of the given objects are null and returns the value for the Comparator or null if both are not null or if the given objects are not the same Object.

Type Parameters:

T - the generic type

Parameters:

object - the object

compareWithObject - the compare with object

Returns:

the integer or null if both are not null or if the given objects are not the same Object.

nullCheck

public static <T> Integer nullCheck(T object,
                                    T compareWithObject,
                                    boolean nullIsGreaterThan)

Checks if one of the given objects are null and returns the value for the Comparator or null if both are not null or if the given objects are not the same Object.

Type Parameters:

T - the generic type

Parameters:

object - the object

compareWithObject - the compare with object

nullIsGreaterThan - the flag that says if null objects are greater

Returns:

the integer or null if both are not null or if the given objects are not the same Object.