org.opendaylight.yangtools.util

Class HashCodeBuilder<T>

java.lang.Object

org.opendaylight.yangtools.util.HashCodeBuilder<T>

Type Parameters:

T - Component object type

All Implemented Interfaces:

Builder<Integer>, CheckedBuilder<Integer,IllegalArgumentException>, Mutable, MutationBehaviour<Mutable>

public final class HashCodeBuilder<T>
extends Object
implements Builder<Integer>

Utility class for incrementally building object hashCode by hashing together component objects, one by one.

Constructor Summary

Constructors

Constructor and Description
HashCodeBuilder() Create a new instance, with internal hash initialized to 1, equivalent of HashCodeBuilder(1).
HashCodeBuilder(int seedHash) Create a new instance, with internal hash set to specified seed.

Method Summary

Modifier and Type	Method and Description
void	addArgument(T obj) Update the internal hash code with the hash code of a component object.
@NonNull Integer	build() Returns instance of the product.
static int	nextHashCode(int hashCode, Object obj) Determine the next hash code combining a base hash code and the hash code of an object.

Methods inherited from class java.lang.Object

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

Constructor Detail

HashCodeBuilder

public HashCodeBuilder()

Create a new instance, with internal hash initialized to 1, equivalent of HashCodeBuilder(1).

HashCodeBuilder

public HashCodeBuilder(int seedHash)

Create a new instance, with internal hash set to specified seed.

Parameters:

seedHash - Seed hash value

Method Detail

nextHashCode

public static int nextHashCode(int hashCode,
                               Object obj)

Determine the next hash code combining a base hash code and the hash code of an object.

Parameters:

hashCode - base hash code

obj - Object to be added

Returns:

Combined hash code

addArgument

public void addArgument(T obj)

Update the internal hash code with the hash code of a component object.

Parameters:

obj - Component object

build

public @NonNull Integer build()

Description copied from interface: CheckedBuilder

Returns instance of the product. Multiple calls to this method are not required to return same instance if the state of the builder has changed.

Specified by:

build in interface CheckedBuilder<Integer,IllegalArgumentException>

Returns:

A newly-built instance