org.apache.directory.server.core.partition.impl.btree

Class IndexAssertionEnumeration

java.lang.Object

org.apache.directory.server.core.partition.impl.btree.IndexAssertionEnumeration

All Implemented Interfaces:

java.util.Enumeration<IndexEntry>, javax.naming.NamingEnumeration<IndexEntry>

public class IndexAssertionEnumeration
extends java.lang.Object
implements javax.naming.NamingEnumeration<IndexEntry>

A prefetching NamingEnumeration over an underlying NamingEnumeration which determines if a element should be returned based on a Assertion.

Field Summary

Fields

Modifier and Type	Field and Description
private IndexAssertion	assertion
private IndexEntry	candidate The returned candidate
private java.util.Map<java.lang.Object,java.lang.Object>	candidates LUT used to avoid returning duplicates
private boolean	checkDups
private boolean	hasMore
private IndexEntry	prefetched The prefetched candidate
private javax.naming.NamingEnumeration<IndexEntry>	underlying The iteration cursor

Constructor Summary

Constructors

Constructor and Description
IndexAssertionEnumeration(javax.naming.NamingEnumeration<IndexEntry> underlying, IndexAssertion assertion)
IndexAssertionEnumeration(javax.naming.NamingEnumeration<IndexEntry> underlying, IndexAssertion assertion, boolean enableDupCheck)

Method Summary

Modifier and Type	Method and Description
void	close()
boolean	hasMore()
boolean	hasMoreElements()
IndexEntry	next()
IndexEntry	nextElement()
private void	prefetch()

Methods inherited from class java.lang.Object

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

Field Detail

prefetched

private final IndexEntry prefetched

The prefetched candidate

candidate

private final IndexEntry candidate

The returned candidate

underlying

private final javax.naming.NamingEnumeration<IndexEntry> underlying

The iteration cursor

candidates

private final java.util.Map<java.lang.Object,java.lang.Object> candidates

LUT used to avoid returning duplicates

assertion

private final IndexAssertion assertion

checkDups

private final boolean checkDups

hasMore

private boolean hasMore

Constructor Detail

IndexAssertionEnumeration

public IndexAssertionEnumeration(javax.naming.NamingEnumeration<IndexEntry> underlying,
                                 IndexAssertion assertion)
                          throws javax.naming.NamingException

Throws:

javax.naming.NamingException

IndexAssertionEnumeration

public IndexAssertionEnumeration(javax.naming.NamingEnumeration<IndexEntry> underlying,
                                 IndexAssertion assertion,
                                 boolean enableDupCheck)
                          throws javax.naming.NamingException

Throws:

javax.naming.NamingException

Method Detail

nextElement

public IndexEntry nextElement()

Specified by:

nextElement in interface java.util.Enumeration<IndexEntry>

See Also:

Enumeration.nextElement()

hasMoreElements

public boolean hasMoreElements()

Specified by:

hasMoreElements in interface java.util.Enumeration<IndexEntry>

See Also:

Enumeration.hasMoreElements()

next

public IndexEntry next()
                throws javax.naming.NamingException

Specified by:

next in interface javax.naming.NamingEnumeration<IndexEntry>

Throws:

javax.naming.NamingException

See Also:

NamingEnumeration.next()

hasMore

public boolean hasMore()

Specified by:

hasMore in interface javax.naming.NamingEnumeration<IndexEntry>

See Also:

NamingEnumeration.hasMore()

close

public void close()
           throws javax.naming.NamingException

Specified by:

close in interface javax.naming.NamingEnumeration<IndexEntry>

Throws:

javax.naming.NamingException

See Also:

NamingEnumeration.close()

prefetch

private void prefetch()
               throws javax.naming.NamingException

Throws:

javax.naming.NamingException