| /* |
| * 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.jjs.ast; |
| |
| import com.google.gwt.dev.jjs.SourceInfo; |
| |
| /** |
| * Java array reference expression. |
| */ |
| public class JArrayRef extends JExpression { |
| |
| private JExpression indexExpr; |
| private JExpression instance; |
| |
| public JArrayRef(SourceInfo info, JExpression instance, JExpression indexExpr) { |
| super(info); |
| this.instance = instance; |
| this.indexExpr = indexExpr; |
| } |
| |
| public JArrayType getArrayType() { |
| JType type = instance.getType(); |
| if (type.isNullType()) { |
| return null; |
| } |
| return (JArrayType) type.getUnderlyingType(); |
| } |
| |
| public JExpression getIndexExpr() { |
| return indexExpr; |
| } |
| |
| public JExpression getInstance() { |
| return instance; |
| } |
| |
| @Override |
| public JType getType() { |
| JArrayType arrayType = getArrayType(); |
| return (arrayType == null) ? JReferenceType.NULL_TYPE : arrayType.getElementType(); |
| } |
| |
| @Override |
| public boolean hasSideEffects() { |
| // TODO: make the last test better when we have null tracking. |
| return instance.hasSideEffects() || indexExpr.hasSideEffects() |
| || instance.getType().isNullType(); |
| } |
| |
| @Override |
| public void traverse(JVisitor visitor, Context ctx) { |
| if (visitor.visit(this, ctx)) { |
| instance = visitor.accept(instance); |
| indexExpr = visitor.accept(indexExpr); |
| } |
| visitor.endVisit(this, ctx); |
| } |
| |
| } |