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/*
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* Copyright 2000-2014 JetBrains s.r.o.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jetbrains.java.decompiler.util;
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import java.util.ArrayList;
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public class ListStack<T> extends ArrayList<T> {
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protected int pointer = 0;
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public ListStack() {
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super();
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}
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public ListStack(ArrayList<T> list) {
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super(list);
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}
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public ListStack<T> clone() {
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ListStack<T> newstack = new ListStack<T>(this);
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newstack.pointer = this.pointer;
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return newstack;
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}
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public T push(T item) {
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this.add(item);
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pointer++;
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return item;
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}
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public T pop() {
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pointer--;
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T o = this.get(pointer);
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this.remove(pointer);
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return o;
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}
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public T pop(int count) {
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T o = null;
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for (int i = count; i > 0; i--) {
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o = this.pop();
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}
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return o;
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}
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public void remove() {
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pointer--;
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this.remove(pointer);
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}
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public void removeMultiple(int count) {
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while (count > 0) {
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pointer--;
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this.remove(pointer);
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count--;
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}
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}
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public boolean empty() {
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return (pointer == 0);
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}
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public int getPointer() {
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return pointer;
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}
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public T getByOffset(int offset) {
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return this.get(pointer + offset);
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}
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public void insertByOffset(int offset, T item) {
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this.add(pointer + offset, item);
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pointer++;
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}
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public void clear() {
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super.clear();
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pointer = 0;
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}
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}
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