| /* |
| * Copyright 2000-2014 JetBrains s.r.o. |
| * |
| * 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 org.jetbrains.java.decompiler.util; |
| |
| import java.util.ArrayList; |
| |
| public class ListStack<T> extends ArrayList<T> { |
| |
| protected int pointer = 0; |
| |
| public ListStack() { |
| super(); |
| } |
| |
| public ListStack(ArrayList<T> list) { |
| super(list); |
| } |
| |
| public ListStack<T> clone() { |
| ListStack<T> newstack = new ListStack<T>(this); |
| newstack.pointer = this.pointer; |
| return newstack; |
| } |
| |
| public T push(T item) { |
| this.add(item); |
| pointer++; |
| return item; |
| } |
| |
| public T pop() { |
| pointer--; |
| T o = this.get(pointer); |
| this.remove(pointer); |
| return o; |
| } |
| |
| public T pop(int count) { |
| T o = null; |
| for (int i = count; i > 0; i--) { |
| o = this.pop(); |
| } |
| return o; |
| } |
| |
| public void remove() { |
| pointer--; |
| this.remove(pointer); |
| } |
| |
| public void removeMultiple(int count) { |
| while (count > 0) { |
| pointer--; |
| this.remove(pointer); |
| count--; |
| } |
| } |
| |
| public boolean empty() { |
| return (pointer == 0); |
| } |
| |
| public int getPointer() { |
| return pointer; |
| } |
| |
| public T getByOffset(int offset) { |
| return this.get(pointer + offset); |
| } |
| |
| public void insertByOffset(int offset, T item) { |
| this.add(pointer + offset, item); |
| pointer++; |
| } |
| |
| public void clear() { |
| super.clear(); |
| pointer = 0; |
| } |
| } |