| /* |
| * Copyright 2014 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.impl; |
| |
| import com.google.gwt.dev.jjs.ast.Context; |
| import com.google.gwt.dev.jjs.ast.JDeclaredType; |
| import com.google.gwt.dev.jjs.ast.JField; |
| import com.google.gwt.dev.jjs.ast.JFieldRef; |
| import com.google.gwt.dev.jjs.ast.JMethod; |
| import com.google.gwt.dev.jjs.ast.JMethodCall; |
| import com.google.gwt.dev.jjs.ast.JNode; |
| import com.google.gwt.dev.jjs.ast.JProgram; |
| import com.google.gwt.dev.jjs.ast.JVisitor; |
| import com.google.gwt.dev.jjs.ast.js.JsniFieldRef; |
| import com.google.gwt.dev.jjs.ast.js.JsniMethodRef; |
| import com.google.gwt.thirdparty.guava.common.collect.HashMultimap; |
| import com.google.gwt.thirdparty.guava.common.collect.Multimap; |
| |
| /** |
| * Verifies that all the references from AST nodes to AST nodes are reachable from the |
| * top of the AST. |
| * <p> |
| * The purpose fo this pass is to verify the consistency of the AST after a specific pass has |
| * run. |
| */ |
| public class JavaAstVerifier extends JVisitor { |
| |
| private Multimap<JDeclaredType, JNode> membersByType = HashMultimap.create(); |
| |
| JavaAstVerifier(JProgram program) { |
| for (JDeclaredType type :program.getModuleDeclaredTypes()) { |
| membersByType.putAll(type, type.getMethods()); |
| membersByType.putAll(type, type.getFields()); |
| } |
| } |
| |
| /** |
| * Throws an assertion error if the AST for a program is not consistent. |
| */ |
| public static void assertProgramIsConsistent(JProgram program) { |
| if (JavaAstVerifier.class.desiredAssertionStatus()) { |
| new JavaAstVerifier(program).accept(program); |
| } |
| } |
| |
| @Override |
| public void endVisit(JFieldRef x, Context ctx) { |
| assertReferencedFieldIsInAst(x); |
| } |
| |
| @Override |
| public void endVisit(JMethodCall x, Context ctx) { |
| assertCalledMethodIsInAst(x); |
| } |
| |
| @Override |
| public void endVisit(JsniFieldRef x, Context ctx) { |
| assertReferencedFieldIsInAst(x); |
| } |
| |
| @Override |
| public void endVisit(JsniMethodRef x, Context ctx) { |
| assertCalledMethodIsInAst(x); |
| } |
| |
| private void assertCalledMethodIsInAst(JMethodCall x) { |
| if (x.getTarget() == JMethod.NULL_METHOD) { |
| return; |
| } |
| assert membersByType.containsEntry(x.getTarget().getEnclosingType(), x.getTarget()); |
| } |
| |
| private void assertReferencedFieldIsInAst(JFieldRef x) { |
| if (x.getField() == JField.NULL_FIELD) { |
| return; |
| } |
| assert membersByType.containsEntry(x.getField().getEnclosingType(), x.getField()); |
| } |
| } |