com.orientechnologies.common.util

Class OCollections

java.lang.Object

com.orientechnologies.common.util.OCollections

public class OCollections
extends Object

Set of utility methods to work with collections.

Constructor Summary

Constructors

Constructor and Description
OCollections()

Method Summary

Modifier and Type	Method and Description
static int	indexOf(int[] array, int object) This method is used to find a number in an array.
static <T> int	indexOf(List<T> list, T object, Comparator<T> comparator) This method is used to find an item in a collection using passed in comparator.
static int	indexOf(Object[] array, Comparable object) This method is used to find an item in an array.
static String	toString(Iterable<?> iterable) Create a string representation of all objects in the given Iterable.

Methods inherited from class java.lang.Object

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

Constructor Detail

OCollections

public OCollections()

Method Detail

indexOf

public static <T> int indexOf(List<T> list,
                              T object,
                              Comparator<T> comparator)

This method is used to find an item in a collection using passed in comparator. Only 0 value (requested object is found) returned by comparator is taken into account the rest is ignored.

Type Parameters:

T - Type of collection elements.

Parameters:

list - List in which value should be found.

object - Object to find.

comparator - Comparator is sued for search.

Returns:

Index of found item or -1 otherwise.

indexOf

public static int indexOf(Object[] array,
                          Comparable object)

This method is used to find an item in an array.

Parameters:

array - Array in which value should be found.

object - Object to find.

Returns:

Index of found item or -1 otherwise.

indexOf

public static int indexOf(int[] array,
                          int object)

This method is used to find a number in an array.

Parameters:

array - Array of integers in which value should be found.

object - number to find.

Returns:

Index of found item or -1 otherwise.

toString

public static String toString(Iterable<?> iterable)

Create a string representation of all objects in the given Iterable. example : [value1,value2,value3]

Parameters:

iterable -

Returns:

String