1 files changed, 24 insertions, 8 deletions
diff --git a/src/de/lmu/ifi/dbs/elki/database/datastore/memory/ArrayDoubleStore.java b/src/de/lmu/ifi/dbs/elki/database/datastore/memory/ArrayDoubleStore.java
index 433547a5..de22a6b3 100644
--- a/src/de/lmu/ifi/dbs/elki/database/datastore/memory/ArrayDoubleStore.java
+++ b/src/de/lmu/ifi/dbs/elki/database/datastore/memory/ArrayDoubleStore.java
@@ -23,9 +23,11 @@ package de.lmu.ifi.dbs.elki.database.datastore.memory;
  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+import java.util.Arrays;
+
 import de.lmu.ifi.dbs.elki.database.datastore.DataStoreIDMap;
 import de.lmu.ifi.dbs.elki.database.datastore.WritableDoubleDataStore;
-import de.lmu.ifi.dbs.elki.database.ids.DBID;
+import de.lmu.ifi.dbs.elki.database.ids.DBIDRef;
 
 /**
  * A class to answer representation queries using the stored Array.
@@ -52,14 +54,28 @@ public class ArrayDoubleStore implements WritableDoubleDataStore {
    * @param idmap ID map
    */
   public ArrayDoubleStore(int size, DataStoreIDMap idmap) {
+    this(size, idmap, Double.NaN);
+  }
+
+  /**
+   * Constructor.
+   * 
+   * @param size Size
+   * @param idmap ID map
+   * @param def Default value
+   */
+  public ArrayDoubleStore(int size, DataStoreIDMap idmap, double def) {
     super();
     this.data = new double[size];
+    if(def != 0) {
+      Arrays.fill(this.data, def);
+    }
     this.idmap = idmap;
   }
 
   @Override
   @Deprecated
-  public Double get(DBID id) {
+  public Double get(DBIDRef id) {
     try {
       return data[idmap.map(id)];
     }
@@ -70,20 +86,20 @@ public class ArrayDoubleStore implements WritableDoubleDataStore {
 
   @Override
   @Deprecated
-  public Double put(DBID id, Double value) {
+  public Double put(DBIDRef id, Double value) {
     final int off = idmap.map(id);
     double ret = data[off];
     data[off] = value;
     return ret;
   }
-  
+
   @Override
-  public double doubleValue(DBID id) {
+  public double doubleValue(DBIDRef id) {
     return data[idmap.map(id)];
   }
 
   @Override
-  public double putDouble(DBID id, double value) {
+  public double putDouble(DBIDRef id, double value) {
     final int off = idmap.map(id);
     final double ret = data[off];
     data[off] = value;
@@ -91,7 +107,7 @@ public class ArrayDoubleStore implements WritableDoubleDataStore {
   }
 
   @Override
-  public double put(DBID id, double value) {
+  public double put(DBIDRef id, double value) {
     final int off = idmap.map(id);
     final double ret = data[off];
     data[off] = value;
@@ -105,7 +121,7 @@ public class ArrayDoubleStore implements WritableDoubleDataStore {
   }
 
   @Override
-  public void delete(DBID id) {
+  public void delete(DBIDRef id) {
     throw new UnsupportedOperationException("Can't delete from a static array storage.");
   }