org.apache.directory.server.core.shared

Class SortedEntryComparator

java.lang.Object

org.apache.directory.server.core.shared.SortedEntryComparator

All Implemented Interfaces:

java.io.Serializable, java.util.Comparator<org.apache.directory.api.ldap.model.entry.Entry>

class SortedEntryComparator
extends java.lang.Object
implements java.util.Comparator<org.apache.directory.api.ldap.model.entry.Entry>, java.io.Serializable

A comparator to sort the entries as per RFC 2891

Field Summary

Fields

Modifier and Type	Field and Description
private org.apache.directory.api.ldap.model.schema.LdapComparator	comparator comparator used for comparing the values of the given attribute type
private boolean	hr flag to indicate if the attribute is human readable or binary
private boolean	multivalued flag to indicate if the attribute type is multivalued
private boolean	reverse flag for indicating the order of sorting
private org.apache.directory.api.ldap.model.schema.AttributeType	type the attribute's type

Constructor Summary

Constructors

Constructor and Description
SortedEntryComparator(org.apache.directory.api.ldap.model.schema.AttributeType at, java.lang.String mrule, boolean reverse, org.apache.directory.api.ldap.model.schema.SchemaManager schemaManager) Creates a new instance of SortedEntryComparator.

Method Summary

Modifier and Type	Method and Description
int	compare(org.apache.directory.api.ldap.model.entry.Entry entry1, org.apache.directory.api.ldap.model.entry.Entry entry2)
private java.lang.Object	sortAndGetFirst(org.apache.directory.api.ldap.model.entry.Attribute at, java.util.TreeSet ts) sorts the values of an attribute and picks the least value

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Comparator

comparing, comparing, comparingDouble, comparingInt, comparingLong, equals, naturalOrder, nullsFirst, nullsLast, reversed, reverseOrder, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Field Detail

type

private transient org.apache.directory.api.ldap.model.schema.AttributeType type

the attribute's type

comparator

private transient org.apache.directory.api.ldap.model.schema.LdapComparator comparator

comparator used for comparing the values of the given attribute type

multivalued

private boolean multivalued

flag to indicate if the attribute type is multivalued

reverse

private boolean reverse

flag for indicating the order of sorting

hr

private boolean hr

flag to indicate if the attribute is human readable or binary

Constructor Detail

SortedEntryComparator

public SortedEntryComparator(org.apache.directory.api.ldap.model.schema.AttributeType at,
                             java.lang.String mrule,
                             boolean reverse,
                             org.apache.directory.api.ldap.model.schema.SchemaManager schemaManager)
                      throws org.apache.directory.api.ldap.model.exception.LdapException

Creates a new instance of SortedEntryComparator.

Parameters:

at - the attribute's type

mrOid - the OID or name of the matchingrule

reverse - flag to indicate the sort order

Throws:

org.apache.directory.api.ldap.model.exception.LdapException

Method Detail

compare

public int compare(org.apache.directory.api.ldap.model.entry.Entry entry1,
                   org.apache.directory.api.ldap.model.entry.Entry entry2)

Specified by:

compare in interface java.util.Comparator<org.apache.directory.api.ldap.model.entry.Entry>

sortAndGetFirst

private java.lang.Object sortAndGetFirst(org.apache.directory.api.ldap.model.entry.Attribute at,
                                         java.util.TreeSet ts)

sorts the values of an attribute and picks the least value

Parameters:

at - the attribute

ts - the TreeSet for sorting

Returns:

the least value among the values of the attribute