| commit | author | age | ||
| 081606 | 1 | /* |
| 2b5c60 | 2 | Mediazentrale - Personal Media Center |
| U | 3 | Copyright (C) 2021 Ulrich Hilger |
| 4 | ||
| 5 | This program is free software: you can redistribute it and/or modify | |
| 6 | it under the terms of the GNU Affero General Public License as | |
| 7 | published by the Free Software Foundation, either version 3 of the | |
| 8 | License, or (at your option) any later version. | |
| 9 | ||
| 10 | This program is distributed in the hope that it will be useful, | |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 13 | GNU Affero General Public License for more details. | |
| 14 | ||
| 15 | You should have received a copy of the GNU Affero General Public License | |
| 16 | along with this program. If not, see <https://www.gnu.org/licenses/>. | |
| 081606 | 17 | */ |
| U | 18 | package de.uhilger.mediaz.store; |
| 19 | ||
| 20 | import com.google.gson.Gson; | |
| b1bf96 | 21 | import com.google.gson.reflect.TypeToken; |
| 081606 | 22 | import de.uhilger.mediaz.Server; |
| U | 23 | import de.uhilger.mediaz.entity.Ablageort; |
| 3d4bca | 24 | import de.uhilger.mediaz.entity.Abspieler; |
| 8d7d35 | 25 | import de.uhilger.mediaz.entity.Abspielliste; |
| cf6509 | 26 | import de.uhilger.mediaz.entity.Einstellung; |
| 081606 | 27 | import java.io.BufferedReader; |
| U | 28 | import java.io.File; |
| 29 | import java.io.FileNotFoundException; | |
| 30 | import java.io.FileReader; | |
| 31 | import java.io.FileWriter; | |
| 32 | import java.io.IOException; | |
| 33 | import java.util.logging.Logger; | |
| 34 | import de.uhilger.mediaz.entity.Entity; | |
| d027b5 | 35 | import de.uhilger.mediaz.entity.Livestream; |
| e60cff | 36 | import de.uhilger.mediaz.entity.Titel; |
| 081606 | 37 | import java.util.ArrayList; |
| b1bf96 | 38 | import java.util.HashMap; |
| 081606 | 39 | import java.util.List; |
| b1bf96 | 40 | import java.util.Map; |
| 081606 | 41 | import java.util.logging.Level; |
| U | 42 | |
| 43 | /** | |
| 2b5c60 | 44 | * Ablage fuer Dateien der Mediazentrale |
| 081606 | 45 | * |
| U | 46 | * [Basispfad]/[Typ]/[Name] |
| 47 | * | |
| 48 | * Typ ist eine der Klassen der Package entity | |
| 49 | * Name muss identisch mit dem Element laut Entity.getName() sein | |
| 50 | * | |
| 51 | * @author ulrich | |
| 52 | * @version 1, 5.4.2021 | |
| 53 | */ | |
| 54 | public class FileStorage implements Storage { | |
| 55 | ||
| 56 | private static final Logger logger = Logger.getLogger(FileStorage.class.getName()); | |
| 57 | ||
| 58 | /** StorageType Ablageort */ | |
| 59 | public static final String ST_ABLAGEORT = "Ablageort"; | |
| dce2c7 | 60 | public static final String ST_EINSTELLUNG = "Einstellung"; |
| 3d4bca | 61 | public static final String ST_ABSPIELER = "Abspieler"; |
| e60cff | 62 | public static final String ST_ABSPIELLISTE = "Abspielliste"; |
| d027b5 | 63 | public static final String ST_LIVESTREAM = "Livestream"; |
| 081606 | 64 | |
| cf6509 | 65 | private final String fileBase; |
| 081606 | 66 | |
| cf6509 | 67 | private final Map<String, TypeToken> types; |
| b1bf96 | 68 | |
| 081606 | 69 | public FileStorage(String base) { |
| U | 70 | this.fileBase = base; |
| b1bf96 | 71 | |
| 5f70da | 72 | // Beispiel: TypeToken<List<String>> list = new TypeToken<List<String>>() {}; |
| b1bf96 | 73 | TypeToken<Ablageort> ttAblageort = new TypeToken<Ablageort>() {}; |
| cf6509 | 74 | TypeToken<Einstellung> ttEinstellung = new TypeToken<Einstellung>() {}; |
| 3d4bca | 75 | TypeToken<Abspieler> ttAbspieler = new TypeToken<Abspieler>() {}; |
| 8d7d35 | 76 | TypeToken<Abspielliste> ttAbspielliste = new TypeToken<Abspielliste>() {}; |
| d027b5 | 77 | TypeToken<Livestream> ttLivestream = new TypeToken<Livestream>() {}; |
| e60cff | 78 | TypeToken<Titel> ttTitel = new TypeToken<Titel>() {}; |
| b1bf96 | 79 | types = new HashMap(); |
| U | 80 | types.put(Ablageort.class.getSimpleName(), ttAblageort); |
| cf6509 | 81 | types.put(Einstellung.class.getSimpleName(), ttEinstellung); |
| 3d4bca | 82 | types.put(Abspieler.class.getSimpleName(), ttAbspieler); |
| 8d7d35 | 83 | types.put(Abspielliste.class.getSimpleName(), ttAbspielliste); |
| e60cff | 84 | types.put(Titel.class.getSimpleName(), ttTitel); |
| d027b5 | 85 | types.put(Livestream.class.getSimpleName(), ttLivestream); |
| 081606 | 86 | } |
| U | 87 | |
| 88 | /** | |
| 89 | * Ein Objekt als JSON in eine Datei schreiben | |
| 90 | * | |
| 91 | * Es wird in den Ordner geschrieben, der von conf angegeben ist | |
| 92 | * | |
| cf6509 | 93 | * Wenn es z.B.ein Ablage-Objekt ist, wird das Objekt in die Datei |
| U | 94 | [conf]/Ablage/[name der Ablage].json geschrieben |
| 95 | ||
| 96 | Der Name der Ablage muss eindeutig sein | |
| 081606 | 97 | * |
| U | 98 | * |
| cf6509 | 99 | * @param entity das Objekt, das geschrieben werden soll |
| U | 100 | * @param overwrite true, wenn Aenderung, false fuer neue Elemente |
| 101 | * @return die Datei oder null, wenn die Datei existiert und ein | |
| 102 | * neues Element (overwrite=false) uebergeben wurde | |
| 103 | * @throws java.io.IOException | |
| 081606 | 104 | */ |
| 2597cd | 105 | public File writeToFile(Entity entity, boolean overwrite) throws IOException { |
| 2b5c60 | 106 | String className = entity.getClass().getSimpleName(); |
| 081606 | 107 | logger.finer(className); |
| U | 108 | File dir = new File(fileBase, className); |
| 109 | dir.mkdirs(); | |
| 2b5c60 | 110 | File file = new File(dir, entity.getName()); |
| 2597cd | 111 | if(file.exists() && !overwrite) { |
| U | 112 | return null; |
| 113 | } else { | |
| 114 | FileWriter fw = new FileWriter(file); | |
| 115 | Gson gson = new Gson(); | |
| 116 | fw.write(gson.toJson(entity)); | |
| 117 | fw.flush(); | |
| 118 | fw.close(); | |
| 119 | return file; | |
| 081606 | 120 | } |
| U | 121 | } |
| 122 | ||
| 5f70da | 123 | public String readFromFile(File file) throws IOException { |
| 081606 | 124 | StringBuilder sb = new StringBuilder(); |
| 5f70da | 125 | BufferedReader r = new BufferedReader(new FileReader(file)); |
| 081606 | 126 | String line = r.readLine(); |
| U | 127 | while(line != null) { |
| 128 | sb.append(line); | |
| 129 | line = r.readLine(); | |
| 130 | } | |
| 131 | r.close(); | |
| 5f70da | 132 | return sb.toString(); |
| U | 133 | } |
| 134 | ||
| 135 | public Entity entityFromFile(File file) throws ClassNotFoundException, FileNotFoundException, IOException { | |
| 136 | String json = readFromFile(file); | |
| e60cff | 137 | logger.finer("json: " + json); |
| 081606 | 138 | Gson gson = new Gson(); |
| 5f70da | 139 | return gson.fromJson(json, typeFromName(typeNameFromPath(file)).getType()); |
| 081606 | 140 | } |
| U | 141 | |
| b1bf96 | 142 | private String typeNameFromPath(File file) { |
| 0e9cd3 | 143 | String[] parts = file.getPath().split(Server.SLASH); |
| 081606 | 144 | return parts[parts.length-2]; |
| U | 145 | } |
| 146 | ||
| 147 | @Override | |
| 2597cd | 148 | public Object write(Entity e, boolean overwrite) { |
| 081606 | 149 | try { |
| 2597cd | 150 | return writeToFile(e, overwrite); |
| 081606 | 151 | } catch (IOException ex) { |
| U | 152 | logger.log(Level.SEVERE, null, ex); |
| 153 | return null; | |
| 154 | } | |
| 155 | } | |
| 156 | ||
| 157 | @Override | |
| 158 | public Entity read(String typ, String name) { | |
| 159 | try { | |
| 5f70da | 160 | return entityFromFile(getFile(typ, name)); |
| 081606 | 161 | } catch (ClassNotFoundException | IOException ex) { |
| U | 162 | logger.log(Level.SEVERE, null, ex); |
| 163 | return null; | |
| 164 | } | |
| 165 | } | |
| 166 | ||
| 167 | @Override | |
| 168 | public List<String> list(String typ) { | |
| 169 | File base = new File(fileBase); | |
| 170 | File dir = new File(base, typ); | |
| 171 | List<String> list = new ArrayList(); | |
| b29119 | 172 | File[] files = dir.listFiles(); |
| U | 173 | if(files != null) { |
| 174 | for(File file : files) { | |
| 175 | //NamedItem n = new NamedItem(); | |
| 176 | //n.setLabel(file.getName()); | |
| 177 | list.add(file.getName()); | |
| 178 | } | |
| 081606 | 179 | } |
| U | 180 | return list; |
| 181 | } | |
| f45e20 | 182 | |
| b1bf96 | 183 | @Override |
| U | 184 | public TypeToken typeFromName(String name) { |
| 185 | return types.get(name); | |
| 186 | } | |
| 187 | ||
| 5f70da | 188 | @Override |
| U | 189 | public String readJson(String typ, String name) { |
| 190 | try { | |
| 191 | return readFromFile(getFile(typ, name)); | |
| 192 | } catch (IOException ex) { | |
| 193 | logger.log(Level.SEVERE, null, ex); | |
| 194 | return null; | |
| 195 | } | |
| 196 | } | |
| 197 | ||
| 198 | private File getFile(String typ, String name) { | |
| 199 | File base = new File(fileBase); | |
| 200 | File dir = new File(base, typ); | |
| 201 | return new File(dir, name); | |
| 202 | } | |
| 203 | ||
| 2b5c60 | 204 | @Override |
| U | 205 | public boolean delete(String typ, String name) { |
| 206 | File file = getFile(typ, name); | |
| 207 | if(file.exists()) { | |
| 208 | return file.delete(); | |
| 209 | } else { | |
| 210 | return false; | |
| 211 | } | |
| 212 | } | |
| f45e20 | 213 | |
| U | 214 | @Override |
| 215 | public List<Entity> listObjects(String typ) { | |
| 216 | File base = new File(fileBase); | |
| 217 | File dir = new File(base, typ); | |
| 218 | List<Entity> list = new ArrayList(); | |
| 219 | File[] files = dir.listFiles(); | |
| 220 | if(files != null) { | |
| 221 | for(File file : files) { | |
| 222 | try { | |
| 223 | list.add(entityFromFile(file)); | |
| 224 | } catch (ClassNotFoundException | IOException ex) { | |
| 225 | logger.log(Level.SEVERE, null, ex); | |
| 226 | } | |
| 227 | } | |
| 228 | } | |
| 229 | return list; | |
| 230 | } | |
| 081606 | 231 | |
| dfb7d3 | 232 | public boolean exists(String typ, String name) { |
| U | 233 | return getFile(typ, name).exists(); |
| 234 | } | |
| 235 | ||
| 081606 | 236 | } |
