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org.neo4j.helpers.collection
Class CollectionWrapper<T,U>

java.lang.Object
  extended by org.neo4j.helpers.collection.CollectionWrapper<T,U>
Type Parameters:
T - the type of items
U - the type of items of the underlying/wrapped collection
All Implemented Interfaces:
Iterable<T>, Collection<T>

public abstract class CollectionWrapper<T,U>
extends Object
implements Collection<T>

Wraps a Collection, making it look (and function) like a collection holding another type of items. The wrapper delegates to its underlying collection instead of keeping track of the items itself.


Constructor Summary
CollectionWrapper(Collection<U> underlyingCollection)
           
 
Method Summary
 boolean add(T o)
           
 boolean addAll(Collection c)
           
 void clear()
           
 boolean contains(Object o)
           
 boolean containsAll(Collection c)
           
protected  Collection<U> convertCollection(Collection c)
           
 boolean isEmpty()
           
 Iterator<T> iterator()
           
protected abstract  U objectToUnderlyingObject(T object)
           
 boolean remove(Object o)
           
 boolean removeAll(Collection c)
           
 boolean retainAll(Collection c)
           
 int size()
           
 Object[] toArray()
           
<R> R[]
toArray(R[] a)
           
protected abstract  T underlyingObjectToObject(U object)
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface java.util.Collection
equals, hashCode
 

Constructor Detail

CollectionWrapper

public CollectionWrapper(Collection<U> underlyingCollection)
Method Detail

objectToUnderlyingObject

protected abstract U objectToUnderlyingObject(T object)

underlyingObjectToObject

protected abstract T underlyingObjectToObject(U object)

add

public boolean add(T o)
Specified by:
add in interface Collection<T>

clear

public void clear()
Specified by:
clear in interface Collection<T>

contains

public boolean contains(Object o)
Specified by:
contains in interface Collection<T>

isEmpty

public boolean isEmpty()
Specified by:
isEmpty in interface Collection<T>

iterator

public Iterator<T> iterator()
Specified by:
iterator in interface Iterable<T>
Specified by:
iterator in interface Collection<T>

remove

public boolean remove(Object o)
Specified by:
remove in interface Collection<T>

size

public int size()
Specified by:
size in interface Collection<T>

convertCollection

protected Collection<U> convertCollection(Collection c)

retainAll

public boolean retainAll(Collection c)
Specified by:
retainAll in interface Collection<T>

addAll

public boolean addAll(Collection c)
Specified by:
addAll in interface Collection<T>

removeAll

public boolean removeAll(Collection c)
Specified by:
removeAll in interface Collection<T>

containsAll

public boolean containsAll(Collection c)
Specified by:
containsAll in interface Collection<T>

toArray

public Object[] toArray()
Specified by:
toArray in interface Collection<T>

toArray

public <R> R[] toArray(R[] a)
Specified by:
toArray in interface Collection<T>

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