Java tutorial
/* * Copyright 2013-present Facebook, 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.facebook.buck.features.ocaml; import com.facebook.buck.core.model.BuildTarget; import com.facebook.buck.core.sourcepath.SourcePath; import com.facebook.buck.core.sourcepath.resolver.SourcePathResolver; import com.facebook.buck.cxx.toolchain.CxxPlatforms; import com.google.common.collect.ImmutableSet; import java.nio.file.Path; import java.nio.file.Paths; import java.util.function.Predicate; /** Utility functions */ public class OcamlUtil { private OcamlUtil() { } /** * Constructs a Predicate instance which returns true if the input argument ends with any String * in extensions * * @param extensions for which to return true * @return a Predicate instance */ public static Predicate<? super Path> ext(String... extensions) { return (Predicate<Path>) input -> { String strInput = input.toString(); for (String ext : extensions) { if (strInput.endsWith(ext)) { return true; } } return false; }; } public static Predicate<? super SourcePath> sourcePathExt(SourcePathResolver resolver, String... extensions) { return (Predicate<SourcePath>) input -> { String strInput = resolver.getRelativePath(input).toString(); for (String ext : extensions) { if (strInput.endsWith(ext)) { return true; } } return false; }; } static ImmutableSet<Path> getExtensionVariants(Path output, String... extensions) { String withoutExtension = stripExtension(output.toString()); ImmutableSet.Builder<Path> builder = ImmutableSet.builder(); for (String ext : extensions) { builder.add(Paths.get(withoutExtension + ext)); } return builder.build(); } static String stripExtension(String fileName) { int index = fileName.lastIndexOf('.'); // if dot is in the first position, // we are dealing with a hidden file rather than an extension return (index > 0) ? fileName.substring(0, index) : fileName; } static Iterable<BuildTarget> getParseTimeDeps(OcamlPlatform platform) { ImmutableSet.Builder<BuildTarget> deps = ImmutableSet.builder(); deps.addAll(platform.getCCompiler().getParseTimeDeps()); deps.addAll(platform.getCxxCompiler().getParseTimeDeps()); deps.addAll(platform.getCPreprocessor().getParseTimeDeps()); deps.addAll(CxxPlatforms.getParseTimeDeps(platform.getCxxPlatform())); return deps.build(); } }