Class Comparators
java.lang.Object
org.eclipse.collections.impl.block.factory.Comparators
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Method Summary
Modifier and TypeMethodDescriptionstatic SerializableComparator<Collection<?>>
static <T> SerializableComparator<T>
byBooleanFunction
(BooleanFunction<T> function) static <T> SerializableComparator<T>
byByteFunction
(ByteFunction<T> function) static <T> SerializableComparator<T>
byCharFunction
(CharFunction<T> function) static <T> SerializableComparator<T>
byDoubleFunction
(DoubleFunction<T> function) static <T> SerializableComparator<Pair<T,
?>> byFirstOfPair
(Comparator<? super T> comparator) Creates a comparator for pairs by using an existing comparator that only compares the first element of the pairstatic <T> SerializableComparator<T>
byFloatFunction
(FloatFunction<T> function) static <T,
V extends Comparable<? super V>>
SerializableComparator<T>byFunction
(Function<? super T, ? extends V> function) static <T,
V> SerializableComparator<T> byFunction
(Function<? super T, ? extends V> function, Comparator<V> comparator) Original signature accepted a Comparator which may not be Serializable.static <T,
V extends Comparable<? super V>>
SerializableComparator<T>byFunctionNullsFirst
(Function<? super T, ? extends V> function) static <T,
V extends Comparable<? super V>>
SerializableComparator<T>byFunctionNullsLast
(Function<? super T, ? extends V> function) static <T> SerializableComparator<T>
byIntFunction
(IntFunction<T> function) static <T> SerializableComparator<T>
byLongFunction
(LongFunction<T> function) static <T> SerializableComparator<Pair<?,
T>> bySecondOfPair
(Comparator<? super T> comparator) Creates a comparator for pairs by using an existing comparator that only compares the second element of the pairstatic <T> SerializableComparator<T>
byShortFunction
(ShortFunction<T> function) static <T> SerializableComparator<T>
chain
(Comparator<T>... comparators) static <T> SerializableComparator<T>
static <T> Comparator<? super T>
comparableComparatorIfNull
(Comparator<? super T> comparator) static SerializableComparator<Collection<?>>
static <T,
V extends Comparable<? super V>>
SerializableComparator<T>fromFunctions
(Function<? super T, ? extends V> one) static <T,
V1 extends Comparable<? super V1>, V2 extends Comparable<? super V2>>
SerializableComparator<T>fromFunctions
(Function<? super T, ? extends V1> one, Function<? super T, ? extends V2> two) static <T,
V1 extends Comparable<? super V1>, V2 extends Comparable<? super V2>, V3 extends Comparable<? super V3>>
SerializableComparator<T>fromFunctions
(Function<? super T, ? extends V1> one, Function<? super T, ? extends V2> two, Function<? super T, ? extends V3> three) static <T> SerializableComparator<T>
Uses the natural compareTo methods of the objects which will throw if there are any nulls.static <T extends Comparable<T>>
intnullSafeCompare
(T value1, T value2) static boolean
nullSafeEquals
(Object value1, Object value2) static <T,
V extends Comparable<? super V>>
SerializableComparator<T>originalByFunction
(Function<? super T, ? extends V> function) Deprecated.static <T,
V> SerializableComparator<T> originalByFunction
(Function<? super T, ? extends V> function, Comparator<V> comparator) Deprecated.static <T> SerializableComparator<T>
Deprecated.static <T> SerializableComparator<T>
Deprecated.static <T> SerializableComparator<SortedSetIterable<T>>
powerSet()
static <T> SerializableComparator<T>
reverse
(Comparator<T> comparator) static <T> SerializableComparator<T>
Uses the natural compareTo methods of the objects which will throw if there are any nulls.static <T> SerializableComparator<T>
safeNullsHigh
(Comparator<T> notNullSafeComparator) static <T> SerializableComparator<T>
safeNullsLow
(Comparator<T> notNullSafeComparator)
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Method Details
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comparableComparator
- Since:
- 10.0
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comparableComparatorIfNull
public static <T> Comparator<? super T> comparableComparatorIfNull(Comparator<? super T> comparator) - Since:
- 10.0
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naturalOrder
Uses the natural compareTo methods of the objects which will throw if there are any nulls. -
originalNaturalOrder
Deprecated.This method exists in order to guarantee serialization compatibility in tests.- Since:
- 11.1
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reverseNaturalOrder
Uses the natural compareTo methods of the objects which will throw if there are any nulls. -
originalReverseNaturalOrder
Deprecated.This method exists in order to guarantee serialization compatibility in tests.- Since:
- 11.1
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reverse
- Parameters:
comparator
- original comparator whose order will be reversed- Returns:
- A comparator that reverses the order of any other Serializable Comparator.
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safeNullsLow
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safeNullsHigh
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chain
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fromFunctions
public static <T,V extends Comparable<? super V>> SerializableComparator<T> fromFunctions(Function<? super T, ? extends V> one) -
fromFunctions
public static <T,V1 extends Comparable<? super V1>, SerializableComparator<T> fromFunctionsV2 extends Comparable<? super V2>> (Function<? super T, ? extends V1> one, Function<? super T, ? extends V2> two) -
fromFunctions
public static <T,V1 extends Comparable<? super V1>, SerializableComparator<T> fromFunctionsV2 extends Comparable<? super V2>, V3 extends Comparable<? super V3>> (Function<? super T, ? extends V1> one, Function<? super T, ? extends V2> two, Function<? super T, ? extends V3> three) -
powerSet
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ascendingCollectionSizeComparator
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descendingCollectionSizeComparator
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byFirstOfPair
Creates a comparator for pairs by using an existing comparator that only compares the first element of the pair- Parameters:
comparator
- original comparator that compares the first element of the pair- Returns:
- A comparator that compares pairs only by their first element
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bySecondOfPair
public static <T> SerializableComparator<Pair<?,T>> bySecondOfPair(Comparator<? super T> comparator) Creates a comparator for pairs by using an existing comparator that only compares the second element of the pair- Parameters:
comparator
- original comparator that compares the second element of the pair- Returns:
- A comparator that compares pairs only by their second element
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byFunction
public static <T,V extends Comparable<? super V>> SerializableComparator<T> byFunction(Function<? super T, ? extends V> function) -
originalByFunction
@Deprecated public static <T,V extends Comparable<? super V>> SerializableComparator<T> originalByFunction(Function<? super T, ? extends V> function) Deprecated.This signature is kept for serialization backwards compatibility.- Since:
- 11.1
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byFunctionNullsLast
public static <T,V extends Comparable<? super V>> SerializableComparator<T> byFunctionNullsLast(Function<? super T, ? extends V> function) -
byFunctionNullsFirst
public static <T,V extends Comparable<? super V>> SerializableComparator<T> byFunctionNullsFirst(Function<? super T, ? extends V> function) -
byBooleanFunction
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byByteFunction
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byCharFunction
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byDoubleFunction
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byFloatFunction
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byIntFunction
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byLongFunction
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byShortFunction
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byFunction
public static <T,V> SerializableComparator<T> byFunction(Function<? super T, ? extends V> function, Comparator<V> comparator) Original signature accepted a Comparator which may not be Serializable. This signature is kept for backwards compatibility. -
originalByFunction
@Deprecated public static <T,V> SerializableComparator<T> originalByFunction(Function<? super T, ? extends V> function, Comparator<V> comparator) Deprecated.Original signature accepted a Comparator which may not be Serializable. This signature is kept for backwards compatibility. -
nullSafeEquals
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nullSafeCompare
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