1 files changed, 186 insertions, 0 deletions

diff --git a/src/de/lmu/ifi/dbs/elki/database/ids/generic/GenericDistanceDBIDList.java b/src/de/lmu/ifi/dbs/elki/database/ids/generic/GenericDistanceDBIDList.java
new file mode 100644
index 00000000..9b6c188b
--- /dev/null
+++ b/src/de/lmu/ifi/dbs/elki/database/ids/generic/GenericDistanceDBIDList.java
@@ -0,0 +1,186 @@
+package de.lmu.ifi.dbs.elki.database.ids.generic;
+
+/*
+ This file is part of ELKI:
+ Environment for Developing KDD-Applications Supported by Index-Structures
+
+ Copyright (C) 2013
+ 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 java.util.ArrayList;
+
+import de.lmu.ifi.dbs.elki.database.ids.DBIDFactory;
+import de.lmu.ifi.dbs.elki.database.ids.DBIDIter;
+import de.lmu.ifi.dbs.elki.database.ids.DBIDRef;
+import de.lmu.ifi.dbs.elki.database.ids.DBIDUtil;
+import de.lmu.ifi.dbs.elki.database.ids.distance.DistanceDBIDListIter;
+import de.lmu.ifi.dbs.elki.database.ids.distance.DistanceDBIDPair;
+import de.lmu.ifi.dbs.elki.database.ids.distance.ModifiableDistanceDBIDList;
+import de.lmu.ifi.dbs.elki.distance.distanceresultlist.DistanceDBIDResultUtil;
+import de.lmu.ifi.dbs.elki.distance.distancevalue.Distance;
+
+/**
+ * Default class to keep a list of distance-object pairs.
+ * 
+ * @author Erich Schubert
+ * 
+ * @param <D> Distance type
+ */
+public class GenericDistanceDBIDList<D extends Distance<D>> implements ModifiableDistanceDBIDList<D> {
+  /**
+   * Actual storage.
+   */
+  final ArrayList<DistanceDBIDPair<D>> storage;
+
+  /**
+   * Constructor.
+   */
+  public GenericDistanceDBIDList() {
+    super();
+    storage = new ArrayList<>();
+  }
+
+  /**
+   * Constructor.
+   * 
+   * @param initialCapacity Capacity
+   */
+  public GenericDistanceDBIDList(int initialCapacity) {
+    super();
+    storage = new ArrayList<>(initialCapacity);
+  }
+
+  @Override
+  public void add(D dist, DBIDRef id) {
+    storage.add(DBIDFactory.FACTORY.newDistancePair(dist, id));
+  }
+
+  /**
+   * Add a prepared pair.
+   * 
+   * @param pair Pair to add
+   */
+  public void add(DistanceDBIDPair<D> pair) {
+    storage.add(pair);
+  }
+
+  @Override
+  public void sort() {
+    DistanceDBIDResultUtil.sortByDistance(storage);
+  }
+
+  @Override
+  public int size() {
+    return storage.size();
+  }
+
+  @Override
+  public DistanceDBIDPair<D> get(int off) {
+    return storage.get(off);
+  }
+
+  @Override
+  public DistanceDBIDListIter<D> iter() {
+    return new Itr();
+  }
+
+  @Override
+  public boolean contains(DBIDRef o) {
+    for(DBIDIter iter = iter(); iter.valid(); iter.advance()) {
+      if(DBIDUtil.equal(iter, o)) {
+        return true;
+      }
+    }
+    return false;
+  }
+
+  @Override
+  public boolean isEmpty() {
+    return size() == 0;
+  }
+
+  @Override
+  public String toString() {
+    return DistanceDBIDResultUtil.toString(this);
+  }
+
+  /**
+   * Iterator class.
+   * 
+   * @author Erich Schubert
+   * 
+   * @apiviz.exclude
+   */
+  protected class Itr implements DistanceDBIDListIter<D> {
+    /**
+     * Iterator position.
+     */
+    int pos = 0;
+
+    @Override
+    public int internalGetIndex() {
+      return get(pos).internalGetIndex();
+    }
+
+    @Override
+    public boolean valid() {
+      return pos < size();
+    }
+
+    @Override
+    public void advance() {
+      pos++;
+    }
+
+    @Override
+    public D getDistance() {
+      return get(pos).getDistance();
+    }
+
+    @Override
+    public DistanceDBIDPair<D> getDistancePair() {
+      return get(pos);
+    }
+    
+    @Override
+    public String toString() {
+      return valid() ? getDistancePair().toString() : "null";
+    }
+
+    @Override
+    public int getOffset() {
+      return pos;
+    }
+
+    @Override
+    public void advance(int count) {
+      pos += count;
+    }
+
+    @Override
+    public void retract() {
+      --pos;
+    }
+
+    @Override
+    public void seek(int off) {
+      pos = off;
+    }
+  }
+}
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