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/* readonlylist.vala
*
* Copyright (C) 2007-2008 Jürg Billeter
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Author:
* Jürg Billeter <j@bitron.ch>
*/
using GLib;
/**
* Read-only view for {@link List} collections.
*
* This class decorates any class which implements the {@link List}
* interface by making it read only. Any method which normally modify data will
* throw an error.
*
* @see List
*/
internal class Gee.ReadOnlyList<G> : Gee.ReadOnlyCollection<G>, List<G> {
/**
* Constructs a read-only list that mirrors the content of the specified
* list.
*
* @param list the list to decorate.
*/
public ReadOnlyList (List<G> list) {
base (list);
}
/**
* {@inheritDoc}
*/
public ListIterator<G> list_iterator () {
return new Iterator<G> (((Gee.List<G>) _collection).list_iterator ());
}
/**
* {@inheritDoc}
*/
public int index_of (G item) {
return ((Gee.List<G>) _collection).index_of (item);
}
/**
* Unimplemented method (read only list).
*/
public void insert (int index, G item) {
assert_not_reached ();
}
/**
* Unimplemented method (read only list).
*/
public G remove_at (int index) {
assert_not_reached ();
}
/**
* {@inheritDoc}
*/
public new G? get (int index) {
return ((Gee.List<G>) _collection).get (index);
}
/**
* Unimplemented method (read only list).
*/
public new void set (int index, G o) {
assert_not_reached ();
}
/**
* Unimplemented method (read only list).
*/
public List<G>? slice (int start, int stop) {
assert_not_reached ();
}
/**
* {@inheritDoc}
*/
public G? first () {
return ((Gee.List<G>) _collection).first ();
}
/**
* {@inheritDoc}
*/
public G? last () {
return ((Gee.List<G>) _collection).last ();
}
/**
* Unimplemented method (read only list).
*/
public void insert_all (int index, Collection<G> collection) {
assert_not_reached ();
}
/**
* {@inheritDoc}
*/
public void sort (CompareFunc? compare = null) {
assert_not_reached ();
}
/**
* {@inheritDoc}
*/
public virtual new List<G> read_only_view {
owned get { return this; }
}
private class Iterator<G> : ReadOnlyCollection.Iterator<G>, BidirIterator<G>, ListIterator<G> {
public Iterator (ListIterator<G> iterator) {
base (iterator);
}
public bool previous () {
return ((ListIterator<G>) _iter).previous ();
}
public bool has_previous () {
return ((ListIterator<G>) _iter).has_previous ();
}
public bool last () {
return ((ListIterator<G>) _iter).last ();
}
public new void set (G item) {
assert_not_reached ();
}
public void insert (G item) {
assert_not_reached ();
}
public void add (G item) {
assert_not_reached ();
}
public int index () {
return ((ListIterator<G>) _iter).index ();
}
}
}
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