com.devexperts.util

Class NumberKeyIndexer<V>

java.lang.Object

com.devexperts.util.Indexer<Long,V>

com.devexperts.util.NumberKeyIndexer<V>

All Implemented Interfaces:

IndexerFunction<Long,V>, IndexerFunction.LongKey<V>, Serializable

Deprecated.

Use functional interfaced IndexerFunction.LongKey or IndexerFunction.IntKey instead.

@Deprecated
public abstract class NumberKeyIndexer<V>
extends Indexer<Long,V>
implements IndexerFunction.LongKey<V>

A subclass of Indexer that distinguishes and identifies elements using number keys.

It assumes that elements are fully identifiable by numeric ID and treats object keys as a mere wrappers. The hash function is computed using (int) (key ^ (key >>> 32)) formula.

The NumberKeyIndexer is Serializable, so that all concrete subclasses shall be serializable in order to support serialization of indexed set and map..

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface com.devexperts.util.IndexerFunction

IndexerFunction.DefaultIdentityKey, IndexerFunction.DefaultIndexerFunction, IndexerFunction.IdentityKey<K,V>, IndexerFunction.IntKey<V>, IndexerFunction.LongKey<V>

Field Summary

Fields inherited from class com.devexperts.util.Indexer

DEFAULT

Fields inherited from interface com.devexperts.util.IndexerFunction

DEFAULT, DEFAULT_IDENTITY_KEY

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	NumberKeyIndexer() Deprecated. Sole constructor; for invocation by subclass constructors, typically implicit.

Method Summary

Modifier and Type	Method and Description
abstract long	getNumberKey(V value) Deprecated. Returns number key for specified value to be used for hashing and identification; called when explicit number key is needed or when other methods delegate operations as specified.
Long	getObjectKey(V value) Deprecated. Returns object key for specified value to be used for hashing and identification; called when explicit object key is needed or when other methods delegate operations as specified.
int	hashCodeByKey(Long key) Deprecated. Returns hash code for specified object key; called when performing operations using object keys.
int	hashCodeByValue(V value) Deprecated. Returns hash code for specified value; called when performing value-based operations, including rehash.
boolean	matchesByKey(Long key, V value) Deprecated. Determines if specified object key matches specified value; called when performing operations using object keys.
boolean	matchesByValue(V newValue, V oldValue) Deprecated. Determines if specified new value matches specified old value; called when performing value-based operations.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.devexperts.util.IndexerFunction

hashCodeByKey, matchesByKey

Constructor Detail

NumberKeyIndexer

protected NumberKeyIndexer()

Deprecated.

Sole constructor; for invocation by subclass constructors, typically implicit.

This implementation does nothing.

Method Detail

hashCodeByValue

public int hashCodeByValue(V value)

Deprecated.

Returns hash code for specified value; called when performing value-based operations, including rehash.

This implementation computes hash function of hashCodeByKey(getNumberKey(value)) expression.

Specified by:

hashCodeByValue in interface IndexerFunction<Long,V>

Specified by:

hashCodeByValue in interface IndexerFunction.LongKey<V>

matchesByValue

public boolean matchesByValue(V newValue,
                              V oldValue)

Deprecated.

Determines if specified new value matches specified old value; called when performing value-based operations.

This implementation delegates to (getNumberKey(newValue) == getNumberKey(oldValue)) expression.

Specified by:

matchesByValue in interface IndexerFunction<Long,V>

Specified by:

matchesByValue in interface IndexerFunction.LongKey<V>

getObjectKey

public Long getObjectKey(V value)

Deprecated.

Returns object key for specified value to be used for hashing and identification; called when explicit object key is needed or when other methods delegate operations as specified.

This implementation delegates to Long.valueOf(getNumberKey(value)) expression.

Specified by:

getObjectKey in interface IndexerFunction<Long,V>

Specified by:

getObjectKey in interface IndexerFunction.LongKey<V>

hashCodeByKey

public int hashCodeByKey(Long key)

Deprecated.

Returns hash code for specified object key; called when performing operations using object keys.

This implementation computes hash function of hashCodeByKey(key.intValue()) expression.

Specified by:

hashCodeByKey in interface IndexerFunction<Long,V>

Specified by:

hashCodeByKey in interface IndexerFunction.LongKey<V>

matchesByKey

public boolean matchesByKey(Long key,
                            V value)

Deprecated.

Determines if specified object key matches specified value; called when performing operations using object keys.

This implementation delegates to (key.longValue() == getNumberKey(value)) expression.

Specified by:

matchesByKey in interface IndexerFunction<Long,V>

Specified by:

matchesByKey in interface IndexerFunction.LongKey<V>

getNumberKey

public abstract long getNumberKey(V value)

Deprecated.

Returns number key for specified value to be used for hashing and identification; called when explicit number key is needed or when other methods delegate operations as specified.

Specified by:

getNumberKey in interface IndexerFunction<Long,V>

Specified by:

getNumberKey in interface IndexerFunction.LongKey<V>