| /* |
| * Copyright (c) 2007, 2018 Oracle and/or its affiliates. All rights reserved. |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v. 2.0, which is available at |
| * http://www.eclipse.org/legal/epl-2.0. |
| * |
| * This Source Code may also be made available under the following Secondary |
| * Licenses when the conditions for such availability set forth in the |
| * Eclipse Public License v. 2.0 are satisfied: GNU General Public License, |
| * version 2 with the GNU Classpath Exception, which is available at |
| * https://www.gnu.org/software/classpath/license.html. |
| * |
| * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0 |
| */ |
| |
| package com.sun.enterprise.tools.apt; |
| |
| import org.jvnet.hk2.annotations.Contract; |
| |
| import javax.lang.model.element.ElementKind; |
| import javax.lang.model.element.Name; |
| import javax.lang.model.element.TypeElement; |
| import javax.lang.model.type.DeclaredType; |
| import javax.lang.model.type.TypeKind; |
| import javax.lang.model.type.TypeMirror; |
| |
| import java.util.HashSet; |
| import java.util.LinkedHashSet; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.TreeMap; |
| |
| /** |
| * Given a {@link TypeElement}, |
| * find all super-types that have {@link Contract}, |
| * including ones pointed by {@link ContractProvided}. |
| * |
| * @author Kohsuke Kawaguchi |
| */ |
| public class ContractFinder { |
| /** |
| * The entry point. |
| */ |
| public static Set<TypeElement> find(TypeElement d) { |
| LinkedHashSet<TypeElement> retVal = new LinkedHashSet<TypeElement>(); |
| |
| for (Map.Entry<String, TypeElement> entry : new ContractFinder().check(d).result.entrySet()) { |
| retVal.add(entry.getValue()); |
| } |
| |
| return retVal; |
| } |
| |
| /** |
| * Converts the Name from the Element to a String |
| * @param name |
| * @return |
| */ |
| private static String convertNameToString(Name name) { |
| if (name == null) return null; |
| return name.toString(); |
| } |
| |
| /** |
| * {@link TypeElement}s whose contracts are already checked. |
| */ |
| private final Set<TypeElement> checkedInterfaces = new HashSet<TypeElement>(); |
| |
| private final TreeMap<String, TypeElement> result = new TreeMap<String, TypeElement>(); |
| |
| private ContractFinder() { |
| } |
| |
| private ContractFinder check(TypeElement d) { |
| |
| // traverse up the inheritance tree and find all supertypes that have @Contract |
| while(true) { |
| checkSuperInterfaces(d); |
| if (ElementKind.CLASS.equals(d.getKind())) { |
| checkContract(d); |
| TypeMirror sc = d.getSuperclass(); |
| if (sc.getKind().equals(TypeKind.NONE)) |
| break; |
| d = (TypeElement) ((DeclaredType) sc).asElement(); |
| } else |
| break; |
| } |
| |
| return this; |
| } |
| |
| private void checkContract(TypeElement type) { |
| if (type.getAnnotation(Contract.class) != null) |
| result.put(convertNameToString(type.getQualifiedName()), type); |
| } |
| |
| private void checkSuperInterfaces(TypeElement d) { |
| for (TypeMirror intf : d.getInterfaces()) { |
| TypeElement i = (TypeElement) ((DeclaredType) intf).asElement(); |
| if(checkedInterfaces.add(i)) { |
| checkContract(i); |
| checkSuperInterfaces(i); |
| } |
| } |
| } |
| } |