UnmodifiableCollection (TUM CCSM Commons JavaDoc)

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edu.tum.cs.commons.collections
Class UnmodifiableCollection<E>

java.lang.Object
  edu.tum.cs.commons.collections.UnmodifiableCollection<E>

All Implemented Interfaces:: java.io.Serializable, java.lang.Iterable<E>, java.util.Collection<E>

Direct Known Subclasses:: UnmodifiableList, UnmodifiableSet

public class UnmodifiableCollection<E>
extends java.lang.Object
implements java.util.Collection<E>, java.io.Serializable
extends java.lang.Object
implements java.util.Collection<E>, java.io.Serializable

This is a wrapper for a Collection prohibiting all calls which would modify its contents. As the construction of this class is performed in constant time it is preferred over copying the collection (which takes linear time). Using this class is also preferred to using the unmodifiableX() in class Collections as they return the collection base type that does not signal, that the object is unmodifiable. Using the classes in this package makes unmodifiability more explicit.

All prohibited methods throw an UnsupportedOperationException. The class is nearly the same as the one returned by Collections.unmodifiableCollection(Collection), but by making it a public class we can make the return value of some methods more explicit.

This collection is serializable if the wrapped collection is serializable.

Version:: $Revision: 26283 $
Author:: Benjamin Hummel, $Author: juergens $
See Also:: Serialized Form
Rating:: GREEN Hash: E7479B41B1D5AFEB227EFF86689F0DAA

Constructor Summary
`UnmodifiableCollection(java.util.Collection<E> c)` Creates a new unmodifiable collection from another collection.

Method Summary

boolean add(E arg0)
Operation is not supported.

boolean addAll(java.util.Collection<? extends E> arg0)
Operation is not supported.

void clear()
Operation is not supported.

boolean contains(java.lang.Object o)

boolean containsAll(java.util.Collection<?> other)

boolean isEmpty()

UnmodifiableIterator<E> iterator()

boolean remove(java.lang.Object arg0)
Operation is not supported.

boolean removeAll(java.util.Collection<?> arg0)
Operation is not supported.

boolean retainAll(java.util.Collection<?> arg0)
Operation is not supported.

int size()

java.lang.Object[] toArray()





<T> T[]

toArray(T[] a)

java.lang.String toString()
Returns a string representation of this collection.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Methods inherited from interface java.util.Collection
`equals, hashCode`

Constructor Detail