| /******************************************************************************* |
| * Copyright (c) 2009, 2017 xored software, Inc. and others. |
| * |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * xored software, Inc. - initial API and Implementation (Alex Panchenko) |
| *******************************************************************************/ |
| package org.eclipse.dltk.tcl.internal.debug.ui.interpreters; |
| |
| import java.util.AbstractSet; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.Set; |
| |
| /** |
| * @since 2.0 |
| */ |
| public class CombinedSet<E> extends AbstractSet<E> { |
| |
| private final Set<E>[] children; |
| |
| public CombinedSet(Set<E>... children) { |
| this.children = children; |
| } |
| |
| @Override |
| public boolean contains(Object o) { |
| for (Set<E> child : children) { |
| if (child.contains(o)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| @Override |
| public Iterator<E> iterator() { |
| if (children.length == 0) { |
| return Collections.<E>emptySet().iterator(); |
| } else if (children.length == 1) { |
| return children[0].iterator(); |
| } else { |
| Set<E> temp = new HashSet<>(); |
| for (Set<E> child : children) { |
| temp.addAll(child); |
| } |
| return temp.iterator(); |
| } |
| } |
| |
| @Override |
| public int size() { |
| if (children.length == 0) { |
| return 0; |
| } else if (children.length == 1) { |
| return children[0].size(); |
| } else if (children.length == 2) { |
| int size = children[0].size(); |
| for (E e : children[1]) { |
| if (!children[0].contains(e)) { |
| ++size; |
| } |
| } |
| return size; |
| } else { |
| Set<E> temp = new HashSet<>(); |
| for (Set<E> child : children) { |
| temp.addAll(child); |
| } |
| return temp.size(); |
| } |
| } |
| } |