Module org.eclipse.persistence.core

Package org.eclipse.persistence.internal.identitymaps

Class IdentityMapKeyEnumeration

java.lang.Object

org.eclipse.persistence.internal.identitymaps.AbstractIdentityMapEnumeration<CacheKey>

org.eclipse.persistence.internal.identitymaps.IdentityMapKeyEnumeration

All Implemented Interfaces:

Enumeration<CacheKey>

public class IdentityMapKeyEnumeration
extends AbstractIdentityMapEnumeration<CacheKey>

Allows to iterate over CacheKey instances stored in the IdentityMap.

Field Summary

Fields inherited from class org.eclipse.persistence.internal.identitymaps.AbstractIdentityMapEnumeration

cacheKeysIterator, nextKey, shouldCheckReadLocks

Constructor Summary

Constructors

Constructor	Description
IdentityMapKeyEnumeration(Collection<CacheKey> keys)	Creates an instance of CacheKey instances enumeration.
IdentityMapKeyEnumeration(Collection<CacheKey> keys, boolean shouldCheckReadLocks)	Creates an instance of CacheKey instances enumeration.

Method Summary

Modifier and Type	Method	Description
CacheKey	nextElement()	Get next element of CacheKey enumeration if this enumeration object has at least one more element to provide.

Methods inherited from class org.eclipse.persistence.internal.identitymaps.AbstractIdentityMapEnumeration

getNextElement, hasMoreElements

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Enumeration

asIterator

Constructor Details

IdentityMapKeyEnumeration

public IdentityMapKeyEnumeration(Collection<CacheKey> keys)

Creates an instance of CacheKey instances enumeration. Checking of read lock on the CacheKey instances is turned on.

Parameters:

keys - Collection of CacheKey instances to be iterated

IdentityMapKeyEnumeration

public IdentityMapKeyEnumeration(Collection<CacheKey> keys,
 boolean shouldCheckReadLocks)

Creates an instance of CacheKey instances enumeration.

Parameters:

keys - Collection of CacheKey instances to be iterated

shouldCheckReadLocks - value of true if read lock on the CacheKey instances should be checked or false otherwise

Method Details

nextElement

public CacheKey nextElement()

Get next element of CacheKey enumeration if this enumeration object has at least one more element to provide.

Specified by:

nextElement in interface Enumeration<CacheKey>

Specified by:

nextElement in class AbstractIdentityMapEnumeration<CacheKey>

Returns:

the next element of this enumeration

Throws:

NoSuchElementException - if no more elements exist