| /* |
| * Copyright 2011 Google Inc. |
| * |
| * 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 com.google.gwt.dev.js.ast; |
| |
| import com.google.gwt.dev.util.collect.Lists; |
| |
| import java.util.List; |
| |
| /** |
| * A normal scope that has a parent and children. |
| */ |
| public abstract class JsNestingScope extends JsScope { |
| |
| /** |
| * Transient because children will add themselves to the parent after deserialization. |
| */ |
| private transient List<JsScope> children = Lists.create(); |
| |
| private JsScope parent; |
| |
| /** |
| * Create a scope with parent. |
| */ |
| public JsNestingScope(JsScope parent, String description) { |
| super(description); |
| assert (parent != null); |
| this.parent = parent; |
| parent.addChild(this); |
| } |
| |
| /** |
| * Returns a list of this scope's child scopes. |
| */ |
| @Override |
| public final List<JsScope> getChildren() { |
| return children; |
| } |
| |
| /** |
| * Returns the parent scope of this scope, or <code>null</code> if this is the root scope. |
| */ |
| @Override |
| public final JsScope getParent() { |
| return parent; |
| } |
| |
| public void nestInto(JsScope newParent) { |
| assert getParent() == JsRootScope.INSTANCE; |
| parent = newParent; |
| parent.addChild(this); |
| } |
| |
| @Override |
| protected final void addChild(JsScope child) { |
| children = Lists.add(children, child); |
| } |
| |
| protected Object readResolve() { |
| children = Lists.create(); |
| parent.addChild(this); |
| return this; |
| } |
| |
| } |