org.apache.ojb.odmg.collections
Class DBagImpl

java.lang.Object
  java.util.AbstractCollection<E>
      java.util.AbstractList
          org.apache.ojb.odmg.collections.DListImpl
              org.apache.ojb.odmg.collections.DBagImpl

All Implemented Interfaces:

Serializable, Iterable, Collection, List, ManageableCollection, PersistenceBrokerAware, DArray, DBag, DCollection, DList

public class DBagImpl
extends DListImpl
implements DBag

The DBag implementation class.

See Also:

Serialized Form

Field Summary

Fields inherited from class java.util.AbstractList

modCount

Constructor Summary

DBagImpl()

DBagImpl(PBKey key)
DBagImpl constructor comment.

Method Summary

DBag	difference(DBag otherBag) A new DBag instance is created that contains the difference of this object and the DBag instance referenced by otherBag.
DBag	intersection(DBag otherBag) A new DBag instance is created that contains the intersection of this object and the DBag referenced by otherBag.
int	occurrences(Object obj) This method returns the number of occurrences of the object obj in the DBag collection.
DBag	union(DBag otherBag) A new DBag instance is created that is the union of this object and otherBag.

Methods inherited from class org.apache.ojb.odmg.collections.DListImpl

add, afterDelete, afterInsert, afterLookup, afterStore, afterUpdate, beforeDelete, beforeInsert, beforeUpdate, checkForOpenTransaction, concat, existsElement, get, getElements, getId, getLog, getPBKey, getTransaction, hashCode, iterator, listIterator, listIterator, ojbAdd, ojbAddAll, ojbIterator, query, remove, resize, select, selectElement, setElements, setId, setPBKey, size, toString

Methods inherited from class java.util.AbstractList

add, addAll, clear, equals, indexOf, lastIndexOf, removeRange, set, subList

Methods inherited from class java.util.AbstractCollection

addAll, contains, containsAll, isEmpty, remove, removeAll, retainAll, toArray, toArray

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.odmg.DCollection

existsElement, query, select, selectElement

Methods inherited from interface java.util.Collection

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

Methods inherited from interface java.util.List

add, addAll, addAll, clear, contains, containsAll, equals, indexOf, isEmpty, lastIndexOf, remove, removeAll, retainAll, set, subList, toArray, toArray

Constructor Detail

DBagImpl

public DBagImpl()

DBagImpl

public DBagImpl(PBKey key)

DBagImpl constructor comment.

Method Detail

difference

public DBag difference(DBag otherBag)

A new DBag instance is created that contains the difference of this object and the DBag instance referenced by otherBag. This method is similar to the removeAll method in Collection, except that this method creates a new collection and removeAll modifies the object to contain the result.

Specified by:

difference in interface DBag

Parameters:

otherBag - The other bag to use in creating the difference.

Returns:

A DBag instance that contains the elements of this object minus the elements in otherBag.

intersection

public DBag intersection(DBag otherBag)

A new DBag instance is created that contains the intersection of this object and the DBag referenced by otherBag. This method is similar to the retainAll method in Collection, except that this method creates a new collection and retainAll modifies the object to contain the result.

Specified by:

intersection in interface DBag

Parameters:

otherBag - The other bag to use in creating the intersection.

Returns:

A DBag instance that contains the intersection of this object and otherBag.

occurrences

public int occurrences(Object obj)

This method returns the number of occurrences of the object obj in the DBag collection.

Specified by:

occurrences in interface DBag

Parameters:

obj - The value that may have elements in the collection.

Returns:

The number of occurrences of obj in this collection.

union

public DBag union(DBag otherBag)

A new DBag instance is created that is the union of this object and otherBag. This method is similar to the addAll method in Collection, except that this method creates a new collection and addAll modifies the object to contain the result.

Specified by:

union in interface DBag

Parameters:

otherBag - The other bag to use in the union operation.

Returns:

A DBag instance that contains the union of this object and otherBag.