1 files changed, 105 insertions, 0 deletions
diff --git a/elki/src/main/java/de/lmu/ifi/dbs/elki/database/datastore/memory/MapIntegerDBIDStore.java b/elki/src/main/java/de/lmu/ifi/dbs/elki/database/datastore/memory/MapIntegerDBIDStore.java
new file mode 100644
index 00000000..08e31971
--- /dev/null
+++ b/elki/src/main/java/de/lmu/ifi/dbs/elki/database/datastore/memory/MapIntegerDBIDStore.java
@@ -0,0 +1,105 @@
+package de.lmu.ifi.dbs.elki.database.datastore.memory;
+
+/*
+ This file is part of ELKI:
+ Environment for Developing KDD-Applications Supported by Index-Structures
+
+ Copyright (C) 2015
+ Ludwig-Maximilians-Universität München
+ Lehr- und Forschungseinheit für Datenbanksysteme
+ ELKI Development Team
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Affero General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+import gnu.trove.map.TIntObjectMap;
+import gnu.trove.map.hash.TIntObjectHashMap;
+import de.lmu.ifi.dbs.elki.database.datastore.WritableDataStore;
+import de.lmu.ifi.dbs.elki.database.ids.DBIDRef;
+import de.lmu.ifi.dbs.elki.database.ids.DBIDUtil;
+
+/**
+ * A class to answer representation queries using a map. Basically, it is just a
+ * wrapper around a regular map.
+ * 
+ * @author Erich Schubert
+ * 
+ * @param <T> Representation object type
+ */
+public class MapIntegerDBIDStore<T> implements WritableDataStore<T> {
+  /**
+   * Storage Map.
+   */
+  private TIntObjectMap<T> data;
+
+  /**
+   * Constructor.
+   * 
+   * @param data Existing map
+   */
+  public MapIntegerDBIDStore(TIntObjectMap<T> data) {
+    super();
+    this.data = data;
+  }
+
+  /**
+   * Constructor.
+   */
+  public MapIntegerDBIDStore() {
+    super();
+    this.data = new TIntObjectHashMap<>();
+  }
+
+  /**
+   * Constructor.
+   *
+   * @param size Expected size
+   */
+  public MapIntegerDBIDStore(int size) {
+    this.data = new TIntObjectHashMap<>(size);
+  }
+
+  @Override
+  public T get(DBIDRef id) {
+    return data.get(DBIDUtil.asInteger(id));
+  }
+
+  @Override
+  public T put(DBIDRef id, T value) {
+    if(value == null) {
+      return data.remove(DBIDUtil.asInteger(id));
+    }
+    return data.put(DBIDUtil.asInteger(id), value);
+  }
+
+  @Override
+  public void destroy() {
+    data = null;
+  }
+
+  @Override
+  public void delete(DBIDRef id) {
+    data.remove(DBIDUtil.asInteger(id));
+  }
+
+  @Override
+  public String getLongName() {
+    return "raw";
+  }
+
+  @Override
+  public String getShortName() {
+    return "raw";
+  }
+}
+\ No newline at end of file