com.google.gwt.dev.jjs.ast.JNameOf Maven / Gradle / Ivy
/*
* Copyright 2009 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.jjs.ast;
import com.google.gwt.dev.jjs.InternalCompilerException;
import com.google.gwt.dev.jjs.SourceInfo;
/**
* An AST node whose evaluation results in the string name of its node.
*/
public class JNameOf extends JExpression {
static boolean replacesNamedElement(JNode newElement, JNode oldElement) {
if (newElement instanceof JType) {
if (!((JType) newElement).replaces((JType) oldElement)) {
return false;
}
} else if (newElement instanceof JField) {
if (!((JField) newElement).replaces((JField) oldElement)) {
return false;
}
} else if (newElement instanceof JMethod) {
if (!((JMethod) newElement).replaces((JMethod) oldElement)) {
return false;
}
} else {
throw new InternalCompilerException("Unexpected node type.");
}
return true;
}
private HasName node;
private JClassType stringType;
public JNameOf(SourceInfo info, JClassType stringType, HasName node) {
super(info);
this.node = node;
this.stringType = stringType;
assert stringType.getName().equals("java.lang.String");
}
public HasName getNode() {
return node;
}
@Override
public JReferenceType getType() {
return stringType.strengthenToNonNull();
}
@Override
public boolean hasSideEffects() {
return false;
}
/**
* Resolve external references during AST stitching.
*/
public void resolve(HasName node, JClassType stringType) {
assert replacesNamedElement((JNode) node, (JNode) this.node);
this.node = node;
assert stringType.replaces(this.stringType);
this.stringType = stringType;
}
@Override
public void traverse(JVisitor visitor, Context ctx) {
if (visitor.visit(this, ctx)) {
// Intentionally not visiting referenced node
}
visitor.endVisit(this, ctx);
}
}