1 files changed, 54 insertions, 0 deletions
diff --git a/src/de/lmu/ifi/dbs/elki/algorithm/clustering/optics/ClusterOrderEntry.java b/src/de/lmu/ifi/dbs/elki/algorithm/clustering/optics/ClusterOrderEntry.java
new file mode 100644
index 00000000..e2f720fc
--- /dev/null
+++ b/src/de/lmu/ifi/dbs/elki/algorithm/clustering/optics/ClusterOrderEntry.java
@@ -0,0 +1,54 @@
+package de.lmu.ifi.dbs.elki.algorithm.clustering.optics;
+
+/*
+ This file is part of ELKI:
+ Environment for Developing KDD-Applications Supported by Index-Structures
+
+ Copyright (C) 2014
+ 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 de.lmu.ifi.dbs.elki.database.ids.DBID;
+
+/**
+ * Generic Cluster Order Entry Interface.
+ * 
+ * @author Erich Schubert
+ * 
+ * @apiviz.landmark
+ * 
+ * @apiviz.composedOf DBID
+ * 
+ * @param <SELF> Type self-reference.
+ */
+public interface ClusterOrderEntry<SELF> extends Comparable<SELF> {
+  /**
+   * Returns the object id of this entry.
+   * 
+   * @return the object id of this entry
+   */
+  public DBID getID();
+
+  /**
+   * Returns the id of the predecessor of this entry if this entry has a
+   * predecessor, null otherwise.
+   * 
+   * @return the id of the predecessor of this entry
+   */
+  public DBID getPredecessorID();
+}
+\ No newline at end of file