| /* |
| * Copyright 2000-2014 JetBrains s.r.o. |
| * |
| * 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. |
| */ |
| |
| /* |
| * @author max |
| */ |
| package com.intellij.openapi.util; |
| |
| import gnu.trove.THashSet; |
| import org.jetbrains.annotations.NonNls; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| import java.util.List; |
| import java.util.Set; |
| |
| public class ClassExtension<T> extends KeyedExtensionCollector<T, Class> { |
| public ClassExtension(@NonNls final String epName) { |
| super(epName); |
| } |
| |
| @NotNull |
| @Override |
| protected String keyToString(@NotNull final Class key) { |
| return key.getName(); |
| } |
| |
| @NotNull |
| @Override |
| protected List<T> buildExtensions(@NotNull final String key, @NotNull final Class classKey) { |
| final Set<String> allSupers = new THashSet<String>(); |
| collectSupers(classKey, allSupers); |
| return buildExtensions(allSupers); |
| } |
| |
| private static void collectSupers(@NotNull Class classKey, @NotNull Set<String> allSupers) { |
| allSupers.add(classKey.getName()); |
| final Class[] interfaces = classKey.getInterfaces(); |
| for (final Class anInterface : interfaces) { |
| collectSupers(anInterface, allSupers); |
| } |
| |
| final Class superClass = classKey.getSuperclass(); |
| if (superClass != null) { |
| collectSupers(superClass, allSupers); |
| } |
| } |
| |
| @Nullable |
| public T forClass(@NotNull Class t) { |
| final List<T> ts = forKey(t); |
| return ts.isEmpty() ? null : ts.get(0); |
| } |
| } |