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/*
* 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;
}
}
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