src/main/java/org/arvados/client/logic/collection/ManifestFactory.java

   1 /*
   2  * Copyright (C) The Arvados Authors. All rights reserved.
   3  *
   4  * SPDX-License-Identifier: AGPL-3.0 OR Apache-2.0
   5  *
   6  */
   7
   8 package org.arvados.client.logic.collection;
   9
  10 import com.google.common.collect.ImmutableList;
  11 import org.arvados.client.common.Characters;
  12
  13 import java.io.File;
  14 import java.util.Collection;
  15 import java.util.List;
  16 import java.util.stream.Collectors;
  17
  18 public class ManifestFactory {
  19
  20     private Collection<File> files;
  21     private List<String> locators;
  22
  23     ManifestFactory(Collection<File> files, List<String> locators) {
  24         this.files = files;
  25         this.locators = locators;
  26     }
  27
  28     public static ManifestFactoryBuilder builder() {
  29         return new ManifestFactoryBuilder();
  30     }
  31
  32     public String create() {
  33         ImmutableList.Builder<String> builder = new ImmutableList.Builder<String>()
  34                 .add(Characters.DOT)
  35                 .addAll(locators);
  36         long filePosition = 0;
  37         for (File file : files) {
  38             builder.add(String.format("%d:%d:%s", filePosition, file.length(), file.getName().replace(" ", Characters.SPACE)));
  39             filePosition += file.length();
  40         }
  41         String manifest = builder.build().stream().collect(Collectors.joining(" ")).concat(Characters.NEW_LINE);
  42         return manifest;
  43     }
  44
  45     public static class ManifestFactoryBuilder {
  46         private Collection<File> files;
  47         private List<String> locators;
  48
  49         ManifestFactoryBuilder() {
  50         }
  51
  52         public ManifestFactory.ManifestFactoryBuilder files(Collection<File> files) {
  53             this.files = files;
  54             return this;
  55         }
  56
  57         public ManifestFactory.ManifestFactoryBuilder locators(List<String> locators) {
  58             this.locators = locators;
  59             return this;
  60         }
  61
  62         public ManifestFactory build() {
  63             return new ManifestFactory(files, locators);
  64         }
  65
  66     }
  67 }