org.neo4j.helpers

Class ArrayUtil

java.lang.Object

org.neo4j.helpers.ArrayUtil

public abstract class ArrayUtil
extends Object

Methods "missing" from Arrays are provided here.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	ArrayUtil.ArrayEquality

Field Summary

Fields

Modifier and Type	Field and Description
static ArrayUtil.ArrayEquality	DEFAULT_ARRAY_EQUALITY

Method Summary

Methods

Modifier and Type	Method and Description
static boolean	approximatelyEqual(double[] that, double[] other, double tolerance)
static Object	clone(Object array)
static <T> T[]	concat(T first, T... additional)
static <T> boolean	contains(T[] array, int arrayLength, T contains)
static <T> boolean	contains(T[] array, T contains)
static <T> boolean	containsAll(T[] array, T[] contains)
static boolean	equals(Object firstArray, Object otherArray)
static boolean	equals(Object firstArray, Object otherArray, ArrayUtil.ArrayEquality equality) I also can't believe this method is missing from Arrays.
static int	hashCode(Object array)
static <T> String	join(T[] items, String delimiter)
static <FROM,TO> TO[]	map(FROM[] from, org.neo4j.function.Function<FROM,TO> transformer, Class<TO> toClass)
static <T> int	missing(T[] array, T[] contains)
static <T> boolean	nullSafeEquals(T first, T other)
static String	toString(Object array) Deprecated. use ObjectUtil.toString(Object) instead.
static <T> T[]	union(T[] first, T[] other)

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_ARRAY_EQUALITY

public static final ArrayUtil.ArrayEquality DEFAULT_ARRAY_EQUALITY

Method Detail

toString

@Deprecated
public static String toString(Object array)

Deprecated. use ObjectUtil.toString(Object) instead.

I can't believe this method is missing from Arrays.

See Also:

for similar functionality.

hashCode

public static int hashCode(Object array)

equals

public static boolean equals(Object firstArray,
             Object otherArray)

equals

public static boolean equals(Object firstArray,
             Object otherArray,
             ArrayUtil.ArrayEquality equality)

I also can't believe this method is missing from Arrays. Both arguments must be arrays of some type.

Parameters:

firstArray - value to compare to the other value

otherArray - value to compare to the first value

equality - equality logic

See Also:

for similar functionality.

clone

public static Object clone(Object array)

approximatelyEqual

public static boolean approximatelyEqual(double[] that,
                         double[] other,
                         double tolerance)

missing

public static <T> int missing(T[] array,
              T[] contains)

Returns:

how many of the items in contains are missing from array. Order of items doesn't matter.

containsAll

public static <T> boolean containsAll(T[] array,
                      T[] contains)

Returns:

true if all items in contains exists in array, otherwise false. Order of items doesn't matter.

contains

public static <T> boolean contains(T[] array,
                   T contains)

Returns:

true if contains exists in array, otherwise false.

contains

public static <T> boolean contains(T[] array,
                   int arrayLength,
                   T contains)

Returns:

true if contains exists in array, otherwise false.

nullSafeEquals

public static <T> boolean nullSafeEquals(T first,
                         T other)

Returns:

true if first and other are both null or are both equal.

union

public static <T> T[] union(T[] first,
            T[] other)

Returns:

an array containing the union of first and other. Items occuring in both first and other will only have of the two in the resulting union.

join

public static <T> String join(T[] items,
              String delimiter)

Returns:

a String representation of items with a custom delimiter in between.

map

public static <FROM,TO> TO[] map(FROM[] from,
                 org.neo4j.function.Function<FROM,TO> transformer,
                 Class<TO> toClass)

Returns:

a new array with all items from from converted into type toClass.

concat

public static <T> T[] concat(T first,
             T... additional)

Returns:

a concatenated array where first as the item at index 0 and the additional items following it.