1 files changed, 67 insertions, 0 deletions
diff --git a/src/de/lmu/ifi/dbs/elki/utilities/datastructures/arraylike/SingleSubsetArrayAdapter.java b/src/de/lmu/ifi/dbs/elki/utilities/datastructures/arraylike/SingleSubsetArrayAdapter.java
new file mode 100644
index 00000000..d7483e4d
--- /dev/null
+++ b/src/de/lmu/ifi/dbs/elki/utilities/datastructures/arraylike/SingleSubsetArrayAdapter.java
@@ -0,0 +1,67 @@
+package de.lmu.ifi.dbs.elki.utilities.datastructures.arraylike;
+
+/*
+ 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/>.
+ */
+
+/**
+ * Single-item subset adapter
+ * 
+ * @author Erich Schubert
+ * 
+ * @param <T> Entry type
+ * @param <A> Array type
+ */
+public class SingleSubsetArrayAdapter<T, A> implements ArrayAdapter<T, A> {
+  /**
+   * Wrapped adapter
+   */
+  ArrayAdapter<T, ? super A> wrapped;
+
+  /**
+   * Offset to return
+   */
+  int off;
+
+  /**
+   * Constructor.
+   * 
+   * @param wrapped Wrapped adapter
+   * @param off Offset
+   */
+  public SingleSubsetArrayAdapter(ArrayAdapter<T, ? super A> wrapped, int off) {
+    super();
+    this.wrapped = wrapped;
+    this.off = off;
+  }
+
+  @Override
+  public int size(A array) {
+    return 1;
+  }
+
+  @Override
+  public T get(A array, int off) throws IndexOutOfBoundsException {
+    assert (off == 0) : "Invalid get()";
+    return wrapped.get(array, off);
+  }
+}
+\ No newline at end of file