org.garret.perst
Class PersistentComparator

java.lang.Object
  org.garret.perst.Persistent
      org.garret.perst.PersistentComparator

All Implemented Interfaces:

java.io.Externalizable, IPersistent, java.io.Serializable

public abstract class PersistentComparator

extends Persistent

Base class for persistent comparator used in SortedCollection class

See Also:

Serialized Form

Constructor Summary

PersistentComparator()

Method Summary

abstract int	compareMembers(IPersistent m1, IPersistent m2) Compare two members of collection
abstract int	compareMemberWithKey(IPersistent mbr, java.lang.Object key) Compare member with specified search key

Methods inherited from class org.garret.perst.Persistent

assignOid, deallocate, equals, getOid, getStorage, hashCode, invalidate, isDeleted, isModified, isPersistent, isRaw, load, loadAndModify, makePersistent, modify, onLoad, onStore, readExternal, recursiveLoading, store, writeExternal

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PersistentComparator

public PersistentComparator()

Method Detail

compareMembers

public abstract int compareMembers(IPersistent m1,
                                   IPersistent m2)

Compare two members of collection

Parameters:

m1 - first members

m2 - second members

Returns:

negative number if m1 < m2, zero if m1 == m2 and positive number if m1 > m2

compareMemberWithKey

public abstract int compareMemberWithKey(IPersistent mbr,
                                         java.lang.Object key)

Compare member with specified search key

Parameters:

mbr - collection member

key - search key

Returns:

negative number if mbr < key, zero if mbr == key and positive number if mbr > key