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92 lines
2.3 KiB
92 lines
2.3 KiB
/* SimpleSet Copyright (C) 1998-2002 Jochen Hoenicke.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; see the file COPYING.LESSER. If not, write to
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* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* $Id$
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*/
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package net.sf.jode.util;
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///#def COLLECTIONS java.util
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import java.util.AbstractSet;
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import java.util.Iterator;
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///#enddef
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public class SimpleSet extends AbstractSet implements Cloneable
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{
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Object[] elementObjects;
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int count = 0;
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public SimpleSet() {
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this(2);
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}
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public SimpleSet(int initialSize) {
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elementObjects = new Object[initialSize];
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}
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public int size() {
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return count;
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}
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public boolean add(Object element) {
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if (element == null)
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throw new NullPointerException();
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for (int i=0; i< count; i++) {
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if (element.equals(elementObjects[i]))
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return false;
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}
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if (count == elementObjects.length) {
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Object[] newArray = new Object[(count+1)*3/2];
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System.arraycopy(elementObjects,0,newArray,0,count);
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elementObjects = newArray;
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}
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elementObjects[count++] = element;
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return true;
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}
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public Object clone() {
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try {
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SimpleSet other = (SimpleSet) super.clone();
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other.elementObjects = (Object[]) elementObjects.clone();
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return other;
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} catch (CloneNotSupportedException ex) {
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throw new InternalError("Clone?");
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}
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}
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public Iterator iterator() {
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return new Iterator() {
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int pos = 0;
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public boolean hasNext() {
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return pos < count;
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}
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public Object next() {
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return elementObjects[pos++];
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}
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public void remove() {
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if (pos < count)
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System.arraycopy(elementObjects, pos,
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elementObjects, pos-1, count - pos);
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count--;
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pos--;
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}
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};
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}
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}
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