1 files changed, 78 insertions, 0 deletions
diff --git a/src/de/lmu/ifi/dbs/elki/datasource/ArrayAdapterDatabaseConnection.java b/src/de/lmu/ifi/dbs/elki/datasource/ArrayAdapterDatabaseConnection.java
new file mode 100644
index 00000000..4a126d65
--- /dev/null
+++ b/src/de/lmu/ifi/dbs/elki/datasource/ArrayAdapterDatabaseConnection.java
@@ -0,0 +1,78 @@
+package de.lmu.ifi.dbs.elki.datasource;
+
+/*
+ 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 java.util.ArrayList;
+import java.util.List;
+
+import de.lmu.ifi.dbs.elki.data.DoubleVector;
+import de.lmu.ifi.dbs.elki.data.type.SimpleTypeInformation;
+import de.lmu.ifi.dbs.elki.data.type.VectorFieldTypeInformation;
+import de.lmu.ifi.dbs.elki.datasource.bundle.MultipleObjectsBundle;
+
+/**
+ * Import an existing data matrix (<code>double[rows][cols]</code>) into an ELKI
+ * database.
+ * 
+ * Note: this class is not parameterizable, but can only be used from Java.
+ * 
+ * @author Erich Schubert
+ */
+public class ArrayAdapterDatabaseConnection implements DatabaseConnection {
+  /**
+   * The actual data.
+   */
+  double[][] data;
+
+  /**
+   * Constructor.
+   * 
+   * @param data Existing data matrix
+   */
+  public ArrayAdapterDatabaseConnection(double[][] data) {
+    super();
+  }
+
+  @Override
+  public MultipleObjectsBundle loadData() {
+    MultipleObjectsBundle b = new MultipleObjectsBundle();
+    int mind = Integer.MAX_VALUE;
+    int maxd = 0;
+    List<DoubleVector> vecs = new ArrayList<DoubleVector>(data.length);
+    for(int i = 0; i < data.length; i++) {
+      mind = Math.min(mind, data[i].length);
+      maxd = Math.max(maxd, data[i].length);
+      vecs.add(new DoubleVector(data[i]));
+    }
+    SimpleTypeInformation<DoubleVector> type;
+    if(mind == maxd) {
+      type = new VectorFieldTypeInformation<DoubleVector>(DoubleVector.class, mind, DoubleVector.STATIC);
+    }
+    else {
+      type = new SimpleTypeInformation<DoubleVector>(DoubleVector.class);
+    }
+    b.appendColumn(type, vecs);
+    return b;
+  }
+}
+\ No newline at end of file