src/main/java/net/pterodactylus/sone/data/impl/DefaultImage.java

   1 /*
   2  * Sone - DefaultImage.java - Copyright © 2013 David Roden
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 package net.pterodactylus.sone.data.impl;
  19
  20 import static com.google.common.base.Optional.absent;
  21 import static com.google.common.base.Optional.fromNullable;
  22 import static com.google.common.base.Preconditions.checkNotNull;
  23 import static com.google.common.base.Preconditions.checkState;
  24
  25 import net.pterodactylus.sone.data.Album;
  26 import net.pterodactylus.sone.data.Image;
  27 import net.pterodactylus.sone.data.Sone;
  28
  29 import com.google.common.base.Optional;
  30 import com.google.common.hash.Hasher;
  31 import com.google.common.hash.Hashing;
  32
  33 /**
  34  * Dumb, store-everything-in-memory implementation of an {@link Image}.
  35  *
  36  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  37  */
  38 public class DefaultImage implements Image {
  39
  40         private final String id;
  41         private final Sone sone;
  42         private final Album album;
  43         private final long creationTime;
  44         private final int width;
  45         private final int height;
  46         private String key;
  47         private String title;
  48         private String description;
  49
  50         public DefaultImage(String id, Sone sone, Album album, String key, long creationTime, int width, int height) {
  51                 this.id = checkNotNull(id, "id must not be null");
  52                 this.sone = sone;
  53                 this.album = album;
  54                 this.key = key;
  55                 this.creationTime = creationTime;
  56                 this.width = width;
  57                 this.height = height;
  58         }
  59
  60         @Override
  61         public String getId() {
  62                 return id;
  63         }
  64
  65         @Override
  66         public Sone getSone() {
  67                 return sone;
  68         }
  69
  70         @Override
  71         public Album getAlbum() {
  72                 return album;
  73         }
  74
  75         @Override
  76         public String getKey() {
  77                 return key;
  78         }
  79
  80         @Override
  81         public boolean isInserted() {
  82                 return key != null;
  83         }
  84
  85         @Override
  86         public long getCreationTime() {
  87                 return creationTime;
  88         }
  89
  90         @Override
  91         public int getWidth() {
  92                 return width;
  93         }
  94
  95         @Override
  96         public int getHeight() {
  97                 return height;
  98         }
  99
 100         @Override
 101         public String getTitle() {
 102                 return title;
 103         }
 104
 105         @Override
 106         public String getDescription() {
 107                 return description;
 108         }
 109
 110         @Override
 111         public Modifier modify() throws IllegalStateException {
 112                 // TODO: reenable check for local images
 113                 return new Modifier() {
 114                         private Optional<String> key = absent();
 115                         private Optional<String> title = absent();
 116                         private Optional<String> description = absent();
 117
 118                         @Override
 119                         public Modifier setKey(String key) {
 120                                 this.key = fromNullable(key);
 121                                 return this;
 122                         }
 123
 124                         @Override
 125                         public Modifier setTitle(String title) {
 126                                 this.title = fromNullable(title);
 127                                 return this;
 128                         }
 129
 130                         @Override
 131                         public Modifier setDescription(String description) {
 132                                 this.description = fromNullable(description);
 133                                 return this;
 134                         }
 135
 136                         @Override
 137                         public Image update() throws IllegalStateException {
 138                                 checkState(!key.isPresent() || (DefaultImage.this.key == null), "key can not be changed");
 139
 140                                 if (key.isPresent()) {
 141                                         DefaultImage.this.key = key.get();
 142                                 }
 143                                 if (title.isPresent()) {
 144                                         DefaultImage.this.title = title.get();
 145                                 }
 146                                 if (description.isPresent()) {
 147                                         DefaultImage.this.description = description.get();
 148                                 }
 149
 150                                 return DefaultImage.this;
 151                         }
 152                 };
 153         }
 154
 155         @Override
 156         public String getFingerprint() {
 157                 Hasher hash = Hashing.sha256().newHasher();
 158                 hash.putString("Image(");
 159                 hash.putString("ID(").putString(id).putString(")");
 160                 hash.putString("Title(").putString(title).putString(")");
 161                 hash.putString("Description(").putString(description).putString(")");
 162                 hash.putString(")");
 163                 return hash.hash().toString();
 164         }
 165
 166         @Override
 167         public int hashCode() {
 168                 return id.hashCode();
 169         }
 170
 171         @Override
 172         public boolean equals(Object object) {
 173                 if (!(object instanceof DefaultImage)) {
 174                         return false;
 175                 }
 176                 return ((DefaultImage) object).id.equals(id);
 177         }
 178
 179 }