How to use

UnmodifiableCollection

in

org.apache.commons.collections.collection

/**
 * Returns an unmodifiable collection backed by the given collection.
 * <p>
 * This method uses the implementation in the decorators subpackage.
 *
 * @param collection  the collection to make unmodifiable, must not be null
 * @return an unmodifiable collection backed by the given collection
 * @throws IllegalArgumentException  if the collection is null
 */
public static Collection unmodifiableCollection(Collection collection) {
  return UnmodifiableCollection.decorate(collection);
}

/**
 * Factory method to create an unmodifiable collection.
 * <p>
 * If the collection passed in is already unmodifiable, it is returned.
 * 
 * @param coll  the collection to decorate, must not be null
 * @return an unmodifiable collection
 * @throws IllegalArgumentException if collection is null
 */
public static Collection decorate(Collection coll) {
  if (coll instanceof Unmodifiable) {
    return coll;
  }
  return new UnmodifiableCollection(coll);
}

public Iterator iterator() {
  return UnmodifiableIterator.decorate(getCollection().iterator());
}

/**
 * Returns an unmodifiable collection backed by the given collection.
 * <p>
 * This method uses the implementation in the decorators subpackage.
 *
 * @param collection  the collection to make unmodifiable, must not be null
 * @return an unmodifiable collection backed by the given collection
 * @throws IllegalArgumentException  if the collection is null
 */
public static Collection unmodifiableCollection(Collection collection) {
  return UnmodifiableCollection.decorate(collection);
}

/**
 * Factory method to create an unmodifiable collection.
 * <p>
 * If the collection passed in is already unmodifiable, it is returned.
 * 
 * @param coll  the collection to decorate, must not be null
 * @return an unmodifiable collection
 * @throws IllegalArgumentException if collection is null
 */
public static Collection decorate(Collection coll) {
  if (coll instanceof Unmodifiable) {
    return coll;
  }
  return new UnmodifiableCollection(coll);
}

public Iterator iterator() {
  return UnmodifiableIterator.decorate(getCollection().iterator());
}

public Collection values() {
  Collection coll = map.values();
  return UnmodifiableCollection.decorate(coll);
}

/**
 * Factory method to create an unmodifiable collection.
 * <p>
 * If the collection passed in is already unmodifiable, it is returned.
 * 
 * @param coll  the collection to decorate, must not be null
 * @return an unmodifiable collection
 * @throws IllegalArgumentException if collection is null
 */
public static Collection decorate(Collection coll) {
  if (coll instanceof Unmodifiable) {
    return coll;
  }
  return new UnmodifiableCollection(coll);
}

public Iterator iterator() {
  return UnmodifiableIterator.decorate(getCollection().iterator());
}

public Collection values() {
  Collection coll = map.values();
  return UnmodifiableCollection.decorate(coll);
}

/**
 * Factory method to create an unmodifiable collection.
 * <p>
 * If the collection passed in is already unmodifiable, it is returned.
 * 
 * @param coll  the collection to decorate, must not be null
 * @return an unmodifiable collection
 * @throws IllegalArgumentException if collection is null
 */
public static Collection decorate(Collection coll) {
  if (coll instanceof Unmodifiable) {
    return coll;
  }
  return new UnmodifiableCollection(coll);
}
 

public Iterator iterator() {
  return UnmodifiableIterator.decorate(getCollection().iterator());
}

public Collection values() {
  Collection coll = map.values();
  return UnmodifiableCollection.decorate(coll);
}

/**
 * Factory method to create an unmodifiable collection.
 * <p>
 * If the collection passed in is already unmodifiable, it is returned.
 * 
 * @param coll  the collection to decorate, must not be null
 * @return an unmodifiable collection
 * @throws IllegalArgumentException if collection is null
 */
public static Collection decorate(Collection coll) {
  if (coll instanceof Unmodifiable) {
    return coll;
  }
  return new UnmodifiableCollection(coll);
}

public Iterator iterator() {
  return UnmodifiableIterator.decorate(getCollection().iterator());
}

public Collection values() {
  Collection coll = map.values();
  return UnmodifiableCollection.decorate(coll);
}

/**
 * Factory method to create an unmodifiable collection.
 * <p>
 * If the collection passed in is already unmodifiable, it is returned.
 * 
 * @param coll  the collection to decorate, must not be null
 * @return an unmodifiable collection
 * @throws IllegalArgumentException if collection is null
 */
public static Collection decorate(Collection coll) {
  if (coll instanceof Unmodifiable) {
    return coll;
  }
  return new UnmodifiableCollection(coll);
}

public Iterator iterator() {
  return UnmodifiableIterator.decorate(getCollection().iterator());
}

public Collection values() {
  Collection coll = super.values();
  return UnmodifiableCollection.decorate(coll);
}

/**
 * Factory method to create an unmodifiable collection.
 * <p>
 * If the collection passed in is already unmodifiable, it is returned.
 * 
 * @param coll  the collection to decorate, must not be null
 * @return an unmodifiable collection
 * @throws IllegalArgumentException if collection is null
 */
public static Collection decorate(Collection coll) {
  if (coll instanceof Unmodifiable) {
    return coll;
  }
  return new UnmodifiableCollection(coll);
}