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SingletonList.java
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55 lines (49 loc) · 1.33 KB
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package soot.util;
/*-
* #%L
* Soot - a J*va Optimization Framework
* %%
* Copyright (C) 2003 Ondrej Lhotak
* %%
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 2.1 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Lesser Public License for more details.
*
* You should have received a copy of the GNU General Lesser Public
* License along with this program. If not, see
* <http://www.gnu.org/licenses/lgpl-2.1.html>.
* #L%
*/
/**
* A list containing exactly one object, immutable.
*
* @author Ondrej Lhotak
*/
@Deprecated
public class SingletonList<E> extends java.util.AbstractList<E> {
private E o;
public SingletonList(E o) {
this.o = o;
}
@Override
public int size() {
return 1;
}
@Override
public boolean contains(Object other) {
return other.equals(o);
}
@Override
public E get(int index) {
if (index != 0) {
throw new IndexOutOfBoundsException("Singleton list; index = " + index);
}
return o;
}
}