| // Copyright 2014 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.util; |
| |
| import com.google.common.base.Predicate; |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.collect.ImmutableSet; |
| import com.google.common.collect.Iterables; |
| import com.google.devtools.build.lib.skyframe.serialization.autocodec.AutoCodec; |
| import com.google.devtools.build.lib.skyframe.serialization.autocodec.AutoCodec.VisibleForSerialization; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.List; |
| import javax.annotation.concurrent.Immutable; |
| |
| /** A set of FileTypes for grouped matching. */ |
| @Immutable |
| @AutoCodec |
| public class FileTypeSet implements Predicate<String> { |
| private final ImmutableSet<FileType> fileTypes; |
| |
| /** A set that matches all files. */ |
| @AutoCodec |
| public static final FileTypeSet ANY_FILE = |
| new FileTypeSet() { |
| @Override |
| public String toString() { |
| return "any files"; |
| } |
| |
| @Override |
| public boolean matches(String filename) { |
| return true; |
| } |
| |
| @Override |
| public List<String> getExtensions() { |
| return ImmutableList.of(); |
| } |
| }; |
| |
| /** A predicate that matches no files. */ |
| @AutoCodec |
| public static final FileTypeSet NO_FILE = |
| new FileTypeSet(ImmutableList.of()) { |
| @Override |
| public String toString() { |
| return "no files"; |
| } |
| |
| @Override |
| public boolean matches(String filename) { |
| return false; |
| } |
| }; |
| |
| private FileTypeSet() { |
| this.fileTypes = null; |
| } |
| |
| private FileTypeSet(FileType... fileTypes) { |
| this.fileTypes = ImmutableSet.copyOf(fileTypes); |
| } |
| |
| @AutoCodec.Instantiator |
| @VisibleForSerialization |
| FileTypeSet(Iterable<FileType> fileTypes) { |
| this.fileTypes = ImmutableSet.copyOf(fileTypes); |
| } |
| |
| /** |
| * Returns a set that matches only the provided {@code fileTypes}. |
| * |
| * <p>If {@code fileTypes} is empty, the returned predicate will match no files. |
| */ |
| public static FileTypeSet of(FileType... fileTypes) { |
| if (fileTypes.length == 0) { |
| return FileTypeSet.NO_FILE; |
| } else { |
| return new FileTypeSet(fileTypes); |
| } |
| } |
| |
| /** |
| * Returns a set that matches only the provided {@code fileTypes}. |
| * |
| * <p>If {@code fileTypes} is empty, the returned predicate will match no files. |
| */ |
| public static FileTypeSet of(Iterable<FileType> fileTypes) { |
| if (Iterables.isEmpty(fileTypes)) { |
| return FileTypeSet.NO_FILE; |
| } else { |
| return new FileTypeSet(fileTypes); |
| } |
| } |
| |
| /** Returns a copy of this {@link FileTypeSet} including the specified `fileTypes`. */ |
| public FileTypeSet including(FileType... fileTypes) { |
| return new FileTypeSet(Iterables.concat(this.fileTypes, Arrays.asList(fileTypes))); |
| } |
| |
| /** Returns true if the filename can be matched by any FileType in this set. */ |
| public boolean matches(String path) { |
| for (FileType type : fileTypes) { |
| if (type.apply(path)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| @VisibleForSerialization |
| ImmutableSet<FileType> getFileTypes() { |
| return fileTypes; |
| } |
| |
| /** Returns true if this predicate matches nothing. */ |
| public boolean isNone() { |
| return this == FileTypeSet.NO_FILE; |
| } |
| |
| @Override |
| public boolean apply(String path) { |
| return matches(path); |
| } |
| |
| /** Returns the list of possible file extensions for this file type. Can be empty. */ |
| public List<String> getExtensions() { |
| List<String> extensions = new ArrayList<>(); |
| for (FileType type : fileTypes) { |
| extensions.addAll(type.getExtensions()); |
| } |
| return extensions; |
| } |
| |
| @Override |
| public String toString() { |
| return StringUtil.joinEnglishList(getExtensions()); |
| } |
| } |