de.lmu.ifi.dbs.elki.utilities
Class DatabaseUtil.CollectionFromRelation<O>

java.lang.Object
  java.util.AbstractCollection<O>
      de.lmu.ifi.dbs.elki.utilities.DatabaseUtil.CollectionFromRelation<O>

All Implemented Interfaces:

Iterable<O>, Collection<O>

Enclosing class:

DatabaseUtil

public static class DatabaseUtil.CollectionFromRelation<O>
extends AbstractCollection<O>
implements Collection<O>

Collection view on a database that retrieves the objects when needed.

Field Summary

(package private) Relation<? extends O>

db The database we query

Constructor Summary

DatabaseUtil.CollectionFromRelation(Relation<? extends O> db)
Constructor.

Method Summary

Iterator<O>	iterator()
int	size()

Methods inherited from class java.util.AbstractCollection

add, addAll, clear, contains, containsAll, isEmpty, remove, removeAll, retainAll, toArray, toArray, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Collection

add, addAll, clear, contains, containsAll, equals, hashCode, isEmpty, remove, removeAll, retainAll, toArray, toArray

Field Detail

db

Relation<? extends O> db

The database we query

Constructor Detail

DatabaseUtil.CollectionFromRelation

public DatabaseUtil.CollectionFromRelation(Relation<? extends O> db)

Constructor.

Parameters:

db - Database

Method Detail

iterator

public Iterator<O> iterator()

Specified by:

iterator in interface Iterable<O>

Specified by:

iterator in interface Collection<O>

Specified by:

iterator in class AbstractCollection<O>

size

public int size()

Specified by:

size in interface Collection<O>

Specified by:

size in class AbstractCollection<O>