com.google.gwt.dev.js.ast.JsNestingScope Maven / Gradle / Ivy
/*
* 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 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 getChildren() {
return children;
}
/**
* Returns the parent scope of this scope, or null 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;
}
}