| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 freemarker.core; |
| |
| /** |
| * Class that's a little bit more efficient than using an {@code ArrayList<LocalContext>}. |
| * |
| * @since 2.3.24 |
| */ |
| final class LocalContextStack { |
| |
| private LocalContext[] buffer = new LocalContext[8]; |
| private int size; |
| |
| void push(LocalContext localContext) { |
| final int newSize = ++size; |
| LocalContext[] buffer = this.buffer; |
| if (buffer.length < newSize) { |
| final LocalContext[] newBuffer = new LocalContext[newSize * 2]; |
| for (int i = 0; i < buffer.length; i++) { |
| newBuffer[i] = buffer[i]; |
| } |
| buffer = newBuffer; |
| this.buffer = newBuffer; |
| } |
| buffer[newSize - 1] = localContext; |
| } |
| |
| void pop() { |
| buffer[--size] = null; |
| } |
| |
| public LocalContext get(int index) { |
| return buffer[index]; |
| } |
| |
| public int size() { |
| return size; |
| } |
| |
| } |