1 /*******************************************************************************
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2 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
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3 * in Industry THTH ry.
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4 * All rights reserved. This program and the accompanying materials
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5 * are made available under the terms of the Eclipse Public License v1.0
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6 * which accompanies this distribution, and is available at
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7 * http://www.eclipse.org/legal/epl-v10.html
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10 * VTT Technical Research Centre of Finland - initial API and implementation
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11 *******************************************************************************/
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12 package org.simantics.utils.datastructures;
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14 import java.util.Collection;
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15 import java.util.Iterator;
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16 import java.util.Set;
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18 public class SetUnion<T> extends ImmutableCollection<T> {
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20 private Set<T> set1;
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21 private Set<T> set2;
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23 public SetUnion(Set<T> set1, Set<T> set2) {
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29 public boolean contains(Object o) {
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30 return set1.contains(o) || set2.contains(o);
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34 public boolean containsAll(Collection<?> c) {
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42 public boolean isEmpty() {
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43 return set1.isEmpty() && set2.isEmpty();
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47 public Iterator<T> iterator() {
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48 return new ImmutableIterator<T>() {
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51 Iterator<T> it1 = set1.iterator();
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52 Iterator<T> it2 = set2.iterator();
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56 public boolean hasNext() {
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68 while(it2.hasNext()) {
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69 element = it2.next();
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70 if(set1.contains(element))
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90 if(element != null) {
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95 while(it2.hasNext()) {
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97 if(!set1.contains(ret))
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108 public int size() {
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109 int count = set1.size();
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111 if(!set1.contains(o))
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