1 files changed, 133 insertions, 0 deletions
diff --git a/src/de/lmu/ifi/dbs/elki/database/ids/integer/TroveArrayDBIDs.java b/src/de/lmu/ifi/dbs/elki/database/ids/integer/TroveArrayDBIDs.java
new file mode 100644
index 00000000..a060c6b8
--- /dev/null
+++ b/src/de/lmu/ifi/dbs/elki/database/ids/integer/TroveArrayDBIDs.java
@@ -0,0 +1,133 @@
+package de.lmu.ifi.dbs.elki.database.ids.integer;
+
+/*
+ This file is part of ELKI:
+ Environment for Developing KDD-Applications Supported by Index-Structures
+
+ Copyright (C) 2012
+ 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.list.TIntList;
+
+import java.util.Iterator;
+
+import de.lmu.ifi.dbs.elki.database.ids.ArrayDBIDs;
+import de.lmu.ifi.dbs.elki.database.ids.DBID;
+import de.lmu.ifi.dbs.elki.database.ids.DBIDIter;
+
+/**
+ * Abstract base class for GNU Trove array based lists.
+ * 
+ * @author Erich Schubert
+ * 
+ * @apiviz.has IntegerDBID
+ * @apiviz.has TroveIteratorAdapter
+ */
+public abstract class TroveArrayDBIDs implements ArrayDBIDs {
+  /**
+   * Get the array store
+   * 
+   * @return the store
+   */
+  abstract protected TIntList getStore();
+
+  @Override
+  public Iterator<DBID> iterator() {
+    return new TroveIteratorAdapter(getStore().iterator());
+  }
+
+  @Override
+  public DBIDIter iter() {
+    return new DBIDItr(getStore());
+  }
+
+  @Override
+  public DBID get(int index) {
+    return new IntegerDBID(getStore().get(index));
+  }
+
+  @Override
+  public int size() {
+    return getStore().size();
+  }
+  
+  @Override
+  public boolean isEmpty() {
+    return getStore().isEmpty();
+  }
+
+  @Override
+  public boolean contains(DBID o) {
+    return getStore().contains(o.getIntegerID());
+  }
+
+  @Override
+  public int binarySearch(DBID key) {
+    return getStore().binarySearch(key.getIntegerID());
+  }
+
+  /**
+   * Iterate over a Trove IntList, ELKI/C-style
+   * 
+   * @author Erich Schubert
+   * 
+   * @apiviz.exclude
+   */
+  protected static class DBIDItr implements DBIDIter {
+    /**
+     * Current position
+     */
+    int pos = 0;
+
+    /**
+     * The actual store we use
+     */
+    TIntList store;
+
+    /**
+     * Constructor.
+     * 
+     * @param store The actual trove store
+     */
+    public DBIDItr(TIntList store) {
+      super();
+      this.store = store;
+    }
+
+    @Override
+    public boolean valid() {
+      return pos < store.size();
+    }
+
+    @Override
+    public void advance() {
+      pos++;
+    }
+
+    @Override
+    public int getIntegerID() {
+      return store.get(pos);
+    }
+
+    @Override
+    public DBID getDBID() {
+      return new IntegerDBID(store.get(pos));
+    }
+  }
+}
+\ No newline at end of file