X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.utils.datastructures%2Fsrc%2Forg%2Fsimantics%2Futils%2Fdatastructures%2FMax2Collection.java;fp=bundles%2Forg.simantics.utils.datastructures%2Fsrc%2Forg%2Fsimantics%2Futils%2Fdatastructures%2FMax2Collection.java;h=84dedd5fb148adc80b42bc8eebb35cb54450ae76;hb=0ae2b770234dfc3cbb18bd38f324125cf0faca07;hp=f100ba55528e79b498350a119ade35994e2c0632;hpb=24e2b34260f219f0d1644ca7a138894980e25b14;p=simantics%2Fplatform.git diff --git a/bundles/org.simantics.utils.datastructures/src/org/simantics/utils/datastructures/Max2Collection.java b/bundles/org.simantics.utils.datastructures/src/org/simantics/utils/datastructures/Max2Collection.java index f100ba555..84dedd5fb 100644 --- a/bundles/org.simantics.utils.datastructures/src/org/simantics/utils/datastructures/Max2Collection.java +++ b/bundles/org.simantics.utils.datastructures/src/org/simantics/utils/datastructures/Max2Collection.java @@ -1,175 +1,175 @@ -/******************************************************************************* - * Copyright (c) 2007, 2010 Association for Decentralized Information Management - * in Industry THTH ry. - * 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: - * VTT Technical Research Centre of Finland - initial API and implementation - *******************************************************************************/ -package org.simantics.utils.datastructures; - -import java.util.Collection; -import java.util.Iterator; - -/** - * Collection with at most 2 elements. Does not use equals for comparison. - */ -public class Max2Collection implements Collection { - - public T first; - public T second; - - static class CollectionIsFullException extends RuntimeException { - - private static final long serialVersionUID = 8693601196559590064L; - - } - - public Max2Collection() { - } - - public Max2Collection(T first, T second) { - this.first = first; - this.second = second; - } - - public Max2Collection(T first) { - this.first = first; - } - - final public T get(int i) { - if(i==0) - return first; - else if(i==1) - return second; - else - throw new IndexOutOfBoundsException(); - } - - final public T getOther(T el) { - if(first != el) - return first; - else - return second; - } - - final public boolean add(T el) { - if(first == null) - first = el; - else if(second == null) - second = el; - else - throw new CollectionIsFullException(); - return true; - } - - final public boolean remove(Object el) { - if(first == el) { - first = second; - second = null; - return true; - } - else if(second == el) { - second = null; - return true; - } - else - return false; - } - - final public void setFirstElement(T el) { - if(second == el) { - second = first; - first = el; - } - } - - final public void setSecondElement(T el) { - if(first == el) { - first = second; - second = el; - } - - } - - final public int size() { - if(first == null) - return 0; - else if(second == null) - return 1; - else - return 2; - } - - final public boolean isEmpty() { - return first == null; - } - - final public boolean isFull() { - return second != null; - } - - @Override - public boolean addAll(Collection c) { - for(T o : c) - add(o); - return !c.isEmpty(); - } - - @Override - public void clear() { - first = null; - second = null; // necessary for gc - } - - @Override - public boolean contains(Object o) { - return first == o || second == o; - } - - @Override - public boolean containsAll(Collection c) { - for(Object o : c) - if(!contains(o)) - return false; - return true; - } - - @Override - public Iterator iterator() { - throw new UnsupportedOperationException(); - } - - @Override - public boolean removeAll(Collection c) { - boolean removed = false; - for(Object o : c) - removed |= remove(o); - return removed; - } - - @Override - public boolean retainAll(Collection c) { - throw new UnsupportedOperationException(); - } - - @Override - public Object[] toArray() { - if(first == null) - return new Object[0]; - if(second == null) - return new Object[] {first}; - else - return new Object[] {first, second}; - } - - @SuppressWarnings("hiding") - @Override - public T[] toArray(T[] a) { - throw new UnsupportedOperationException(); - } - -} +/******************************************************************************* + * Copyright (c) 2007, 2010 Association for Decentralized Information Management + * in Industry THTH ry. + * 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: + * VTT Technical Research Centre of Finland - initial API and implementation + *******************************************************************************/ +package org.simantics.utils.datastructures; + +import java.util.Collection; +import java.util.Iterator; + +/** + * Collection with at most 2 elements. Does not use equals for comparison. + */ +public class Max2Collection implements Collection { + + public T first; + public T second; + + static class CollectionIsFullException extends RuntimeException { + + private static final long serialVersionUID = 8693601196559590064L; + + } + + public Max2Collection() { + } + + public Max2Collection(T first, T second) { + this.first = first; + this.second = second; + } + + public Max2Collection(T first) { + this.first = first; + } + + final public T get(int i) { + if(i==0) + return first; + else if(i==1) + return second; + else + throw new IndexOutOfBoundsException(); + } + + final public T getOther(T el) { + if(first != el) + return first; + else + return second; + } + + final public boolean add(T el) { + if(first == null) + first = el; + else if(second == null) + second = el; + else + throw new CollectionIsFullException(); + return true; + } + + final public boolean remove(Object el) { + if(first == el) { + first = second; + second = null; + return true; + } + else if(second == el) { + second = null; + return true; + } + else + return false; + } + + final public void setFirstElement(T el) { + if(second == el) { + second = first; + first = el; + } + } + + final public void setSecondElement(T el) { + if(first == el) { + first = second; + second = el; + } + + } + + final public int size() { + if(first == null) + return 0; + else if(second == null) + return 1; + else + return 2; + } + + final public boolean isEmpty() { + return first == null; + } + + final public boolean isFull() { + return second != null; + } + + @Override + public boolean addAll(Collection c) { + for(T o : c) + add(o); + return !c.isEmpty(); + } + + @Override + public void clear() { + first = null; + second = null; // necessary for gc + } + + @Override + public boolean contains(Object o) { + return first == o || second == o; + } + + @Override + public boolean containsAll(Collection c) { + for(Object o : c) + if(!contains(o)) + return false; + return true; + } + + @Override + public Iterator iterator() { + throw new UnsupportedOperationException(); + } + + @Override + public boolean removeAll(Collection c) { + boolean removed = false; + for(Object o : c) + removed |= remove(o); + return removed; + } + + @Override + public boolean retainAll(Collection c) { + throw new UnsupportedOperationException(); + } + + @Override + public Object[] toArray() { + if(first == null) + return new Object[0]; + if(second == null) + return new Object[] {first}; + else + return new Object[] {first, second}; + } + + @SuppressWarnings("hiding") + @Override + public T[] toArray(T[] a) { + throw new UnsupportedOperationException(); + } + +}