/*
* Copyright 2006 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package jdave.examples;
import java.util.Collection;
import java.util.Iterator;
/**
* @author Joni Freeman
* @author Pekka Enberg
*/
public class Stack<T> implements Collection<T> {
private static final int UNLIMITED = -1;
private final int maxSize;
private java.util.Stack<T> stack = new java.util.Stack<T>();
public Stack() {
this(UNLIMITED);
}
public Stack(int maxSize) {
this.maxSize = maxSize;
}
public boolean empty() {
return stack.isEmpty();
}
public boolean full() {
return maxSize != UNLIMITED && stack.size() == maxSize;
}
public T peek() {
return stack.peek();
}
public void push(T element) {
if (full()) {
throw new StackOverflowException();
}
stack.push(element);
}
public boolean add(T o) {
throw new UnsupportedOperationException();
}
public boolean addAll(Collection<? extends T> c) {
throw new UnsupportedOperationException();
}
public void clear() {
throw new UnsupportedOperationException();
}
public boolean contains(Object o) {
return stack.contains(o);
}
public boolean containsAll(Collection<?> c) {
return stack.containsAll(c);
}
public boolean isEmpty() {
throw new UnsupportedOperationException();
}
public Iterator<T> iterator() {
return stack.iterator();
}
public boolean remove(Object o) {
return stack.remove(o);
}
public boolean removeAll(Collection<?> c) {
throw new UnsupportedOperationException();
}
public boolean retainAll(Collection<?> c) {
throw new UnsupportedOperationException();
}
public int size() {
return stack.size();
}
public Object[] toArray() {
return stack.toArray();
}
public <V> V[] toArray(V[] a) {
return stack.toArray(a);
}
@Override
public String toString() {
return stack.toString();
}
}