| /* |
| * Copyright 2012 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.web.bindery.requestfactory.vm.impl; |
| |
| import java.util.Comparator; |
| import java.util.logging.Level; |
| import java.util.logging.Logger; |
| |
| /** |
| * Orders classes by assignability, with most-derived types ordered first, and then by name. |
| */ |
| class ClassComparator implements Comparator<String> { |
| private static final Logger log = Logger.getLogger(ClassComparator.class.getName()); |
| |
| private final ClassLoader resolveClassesWith; |
| |
| public ClassComparator(ClassLoader resolveClassesWith) { |
| this.resolveClassesWith = resolveClassesWith; |
| } |
| |
| @Override |
| public int compare(String className1, String className2) { |
| Class<?> class1 = forName(className1); |
| Class<?> class2 = forName(className2); |
| if (class1.equals(class2)) { |
| return 0; |
| } else if (class1.isAssignableFrom(class2)) { |
| return 1; |
| } else if (class2.isAssignableFrom(class1)) { |
| return -1; |
| } |
| return className1.compareTo(className2); |
| } |
| |
| private Class<?> forName(String name) { |
| try { |
| return Class.forName(name, false, resolveClassesWith); |
| } catch (ClassNotFoundException e) { |
| String msg = "Could not locate class " + name; |
| log.log(Level.SEVERE, msg, e); |
| throw new RuntimeException(msg, e); |
| } |
| } |
| }; |