| /* |
| * Copyright 2018 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 io.bazel.ruleskotlin.workers; |
| |
| import java.util.Optional; |
| import java.util.function.Function; |
| import java.util.function.Supplier; |
| |
| @FunctionalInterface |
| public interface CompileResult { |
| /** |
| * The status of this operation. |
| */ |
| default int status() { |
| return 0; |
| } |
| |
| default Optional<Exception> error() { |
| return Optional.empty(); |
| } |
| |
| default void propogateError(String message) throws RuntimeException { |
| error().ifPresent(e -> { |
| throw new RuntimeException(message, e); |
| }); |
| } |
| |
| static CompileResult just(final int status) { |
| return new CompileResult() { |
| @Override |
| public int status() { |
| return status; |
| } |
| |
| @Override |
| public Integer render(Context ctx) { |
| return status; |
| } |
| }; |
| } |
| |
| static CompileResult error(final Exception error) { |
| return new CompileResult() { |
| @Override |
| public int status() { |
| return -1; |
| } |
| |
| @Override |
| public Optional<Exception> error() { |
| return Optional.of(error); |
| } |
| |
| @Override |
| public Integer render(Context ctx) { |
| throw new RuntimeException(error); |
| } |
| }; |
| } |
| |
| static CompileResult deferred(final int status, Function<Context, Integer> renderer) { |
| return new CompileResult() { |
| @Override |
| public int status() { |
| return status; |
| } |
| |
| @Override |
| public Integer render(Context ctx) { |
| return renderer.apply(ctx); |
| } |
| }; |
| } |
| |
| final class Meta extends io.bazel.ruleskotlin.workers.Meta<CompileResult> { |
| public Meta(String id) { |
| super(id); |
| } |
| |
| public CompileResult run(final Context ctx, Function<Context, Integer> op) { |
| CompileResult result; |
| try { |
| result = CompileResult.just(op.apply(ctx)); |
| } catch (Exception e) { |
| result = CompileResult.error(e); |
| } |
| return result; |
| } |
| |
| public CompileResult runAndBind(final Context ctx, Function<Context, Integer> op) { |
| CompileResult res = run(ctx, op); |
| bind(ctx, res); |
| return res; |
| } |
| |
| public CompileResult runAndBind(final Context ctx, Supplier<Integer> op) { |
| return runAndBind(ctx, (c) -> op.get()); |
| } |
| } |
| |
| /** |
| * Materialise the output of the compile result. |
| * |
| * @return the new status of the compile operation, this shouldn't make a failing status pass, but it could fail a compile operation. |
| */ |
| Integer render(Context ctx); |
| } |