com.google.gwt.dev.js.ast.JsNameRef Maven / Gradle / Ivy
/*
* Copyright 2008 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.jjs.SourceInfo;
import com.google.gwt.dev.util.StringInterner;
/**
* Represents a JavaScript expression that references a name.
*/
public final class JsNameRef extends JsExpression implements CanBooleanEval, HasName {
private String ident;
private JsName name;
private JsExpression qualifier;
public JsNameRef(SourceInfo sourceInfo, JsName name) {
super(sourceInfo);
this.name = name;
}
public JsNameRef(SourceInfo sourceInfo, String ident) {
super(sourceInfo);
this.ident = StringInterner.get().intern(ident);
}
public String getIdent() {
return (name == null) ? ident : name.getIdent();
}
@Override
public NodeKind getKind() {
return NodeKind.NAME_REF;
}
@Override
public JsName getName() {
return name;
}
public JsExpression getQualifier() {
return qualifier;
}
public String getShortIdent() {
return (name == null) ? ident : name.getShortIdent();
}
@Override
public boolean hasSideEffects() {
return qualifier != null && qualifier.hasSideEffects();
}
@Override
public boolean isBooleanFalse() {
return isDefinitelyNull();
}
@Override
public boolean isBooleanTrue() {
return false;
}
@Override
public boolean isDefinitelyNull() {
return name == JsRootScope.INSTANCE.getUndefined();
}
public boolean isJsniReference() {
return getIdent().charAt(0) == '@';
}
@Override
public boolean isLeaf() {
if (qualifier == null) {
return true;
}
return qualifier.isLeaf();
}
public boolean isResolved() {
return name != null;
}
public void resolve(JsName name) {
this.name = name;
this.ident = null;
}
public void setQualifier(JsExpression qualifier) {
this.qualifier = qualifier;
}
@Override
public void traverse(JsVisitor v, JsContext ctx) {
if (v.visit(this, ctx)) {
if (qualifier != null) {
qualifier = v.accept(qualifier);
}
}
v.endVisit(this, ctx);
}
}