| // Copyright 2015 The Bazel Authors. All rights reserved. |
| // |
| // 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.devtools.build.lib.packages; |
| |
| /** |
| * A class of aspects that are implemented natively in Bazel. |
| * |
| * <p>This class just wraps a {@link java.lang.Class} implementing the |
| * aspect factory. All wrappers of the same class are equal. |
| */ |
| public final class NativeAspectClass<T extends NativeAspectClass.NativeAspectFactory> |
| implements AspectClass { |
| private final Class<? extends T> nativeClass; |
| |
| public NativeAspectClass(Class<? extends T> nativeClass) { |
| this.nativeClass = nativeClass; |
| } |
| |
| @Override |
| public String getName() { |
| return nativeClass.getSimpleName(); |
| } |
| |
| @Override |
| public AspectDefinition getDefinition(AspectParameters aspectParameters) { |
| return newInstance().getDefinition(aspectParameters); |
| } |
| |
| public T newInstance() { |
| try { |
| return nativeClass.newInstance(); |
| } catch (Exception e) { |
| throw new IllegalStateException(e); |
| } |
| } |
| |
| @Override |
| public int hashCode() { |
| return nativeClass.hashCode(); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (!(obj instanceof NativeAspectClass)) { |
| return false; |
| } |
| return nativeClass.equals(((NativeAspectClass<?>) obj).nativeClass); |
| } |
| |
| /** |
| * Every native aspect should implement this interface. |
| */ |
| public interface NativeAspectFactory { |
| /** |
| * Returns the definition of the aspect. |
| */ |
| AspectDefinition getDefinition(AspectParameters aspectParameters); |
| } |
| } |