| /* |
| * Copyright 2016 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.idea.blaze.base.io; |
| |
| import com.google.common.collect.ImmutableMap; |
| import com.google.idea.blaze.base.async.executor.BlazeExecutor; |
| import java.io.File; |
| |
| /** Reads the file sizes from a list of files. */ |
| public class FileSizeScanner { |
| |
| private static final class FileSizeReader implements FileAttributeScanner.AttributeReader<Long> { |
| |
| private final FileAttributeProvider attributeProvider; |
| |
| FileSizeReader(FileAttributeProvider attributeProvider) { |
| this.attributeProvider = attributeProvider; |
| } |
| |
| @Override |
| public Long getAttribute(File file) { |
| return attributeProvider.getFileSize(file); |
| } |
| |
| @Override |
| public boolean isValid(Long timestamp) { |
| return timestamp != 0; |
| } |
| } |
| |
| public static ImmutableMap<File, Long> readFilesizes(Iterable<File> fileList) throws Exception { |
| final FileSizeReader fileSizeReader = new FileSizeReader(FileAttributeProvider.getInstance()); |
| return FileAttributeScanner.readAttributes( |
| fileList, fileSizeReader, BlazeExecutor.getInstance()); |
| } |
| } |