1 /*******************************************************************************
2 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
4 * All rights reserved. This program and the accompanying materials
5 * are made available under the terms of the Eclipse Public License v1.0
6 * which accompanies this distribution, and is available at
7 * http://www.eclipse.org/legal/epl-v10.html
10 * VTT Technical Research Centre of Finland - initial API and implementation
11 *******************************************************************************/
12 package org.simantics.utils.datastructures;
14 import java.util.Collection;
15 import java.util.Iterator;
17 public class CollectionAdapter<Domain, Range, C extends Collection<Domain>>
18 implements Collection<Range> {
20 protected Converter<Domain, Range> converter;
21 protected C collection;
23 public CollectionAdapter(Converter<Domain, Range> converter, C collection) {
24 this.converter = converter;
25 this.collection = collection;
28 public boolean add(Range e) {
29 return collection.add(converter.convertFrom(e));
31 @SuppressWarnings("unchecked")
33 public boolean addAll(Collection<? extends Range> c) {
34 return collection.addAll(new CollectionAdapter<Range, Domain, Collection<Range>>(inverseConverter(converter), (Collection<Range>)c));
40 @SuppressWarnings("unchecked")
42 public boolean contains(Object o) {
43 return collection.contains(converter.convertFrom((Range)o));
46 public boolean containsAll(Collection<?> c) {
53 public boolean isEmpty() {
54 return collection.isEmpty();
57 public Iterator<Range> iterator() {
58 return new IteratorAdapter<Domain, Range, Iterator<Domain>>(converter, collection.iterator());
60 @SuppressWarnings("unchecked")
62 public boolean remove(Object o) {
63 return collection.remove(converter.convertFrom((Range)o));
66 public boolean removeAll(Collection<?> c) {
67 boolean removed = false;
72 @SuppressWarnings("unchecked")
74 public boolean retainAll(Collection<?> c) {
76 return collection.retainAll(new CollectionAdapter<Range, Domain, Collection<Range>>(inverseConverter(converter), (Collection<Range>)c));
80 return collection.size();
83 public Object[] toArray() {
84 Object[] ret = new Object[collection.size()];
86 for(Domain d : collection)
87 ret[i++] = converter.convertTo(d);
91 public <T> T[] toArray(T[] a) {
92 throw new UnsupportedOperationException();
95 public static <D,R> Converter<R,D> inverseConverter(final Converter<D,R> converter) {
96 return new Converter<R,D>() {
99 public R convertFrom(D rangeElement) {
100 return converter.convertTo(rangeElement);
104 public D convertTo(R domainElement) {
105 return converter.convertFrom(domainElement);