org.elasticsearch.util.base
Class Objects

java.lang.Object
  org.elasticsearch.util.base.Objects

public final class Objects
extends java.lang.Object

Helper functions that can operate on any Object.

Method Summary

static boolean	equal(java.lang.Object a, java.lang.Object b) Determines whether two possibly-null objects are equal.
static int	hashCode(java.lang.Object... objects) Generates a hash code for multiple values.

Methods inherited from class java.lang.Object

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

Method Detail

equal

public static boolean equal(@Nullable
                            java.lang.Object a,
                            @Nullable
                            java.lang.Object b)

Determines whether two possibly-null objects are equal. Returns:

• true if a and b are both null.
• true if a and b are both non-null and they are equal according to Object.equals(Object).
• false in all other situations.

This assumes that any non-null objects passed to this function conform to the equals() contract.

hashCode

public static int hashCode(java.lang.Object... objects)

Generates a hash code for multiple values. The hash code is generated by calling Arrays.hashCode(Object[]).

This is useful for implementing Object.hashCode(). For example, in an object that has three properties, x, y, and z, one could write:

 public int hashCode() {
   return Objects.hashCode(getX(), getY(), getZ());
 }

Warning: When a single object is supplied, the returned hash code does not equal the hash code of that object.