Import Debian changes 0.5.0~beta2-1

elki (0.5.0~beta2-1) unstable; urgency=low

  * New upstream beta release.
  * Needs GNU Trove 3, in NEW.
  * Build with OpenJDK7, as OpenJDK6 complains.

elki (0.5.0~beta1-1) unstable; urgency=low

  * New upstream beta release.
  * Needs GNU Trove 3, not yet in Debian (private package)
  * Build with OpenJDK7, as OpenJDK6 complains.

1 files changed, 253 insertions, 0 deletions

diff --git a/src/de/lmu/ifi/dbs/elki/utilities/datastructures/arraylike/ArrayLikeUtil.java b/src/de/lmu/ifi/dbs/elki/utilities/datastructures/arraylike/ArrayLikeUtil.java
new file mode 100644
index 00000000..2d29f40c
--- /dev/null
+++ b/src/de/lmu/ifi/dbs/elki/utilities/datastructures/arraylike/ArrayLikeUtil.java
@@ -0,0 +1,253 @@
+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/>.
+ */
+
+import java.util.List;
+
+import de.lmu.ifi.dbs.elki.data.FeatureVector;
+import de.lmu.ifi.dbs.elki.data.NumberVector;
+
+/**
+ * Utility class that allows plug-in use of various "array-like" types such as
+ * lists in APIs that can take any kind of array to safe the cost of
+ * reorganizing the objects into a real array.
+ * 
+ * @author Erich Schubert
+ */
+public final class ArrayLikeUtil {
+  /**
+   * Static instance for lists
+   */
+  private static final ListArrayAdapter<Object> LISTADAPTER = new ListArrayAdapter<Object>();
+
+  /**
+   * Static instance for lists of numbers
+   */
+  private static final NumberListArrayAdapter<Number> NUMBERLISTADAPTER = new NumberListArrayAdapter<Number>();
+
+  /**
+   * Static instance
+   */
+  private final static IdentityArrayAdapter<?> IDENTITYADAPTER = new IdentityArrayAdapter<Object>();
+
+  /**
+   * Static instance
+   */
+  private static final FeatureVectorAdapter<?> FEATUREVECTORADAPTER = new FeatureVectorAdapter<Number>();
+
+  /**
+   * Use a number vector in the array API.
+   */
+  private static final NumberVectorAdapter<?> NUMBERVECTORADAPTER = new NumberVectorAdapter<Double>();
+
+  /**
+   * Use a double array in the array API.
+   */
+  public static final NumberArrayAdapter<Double, double[]> DOUBLEARRAYADAPTER = new DoubleArrayAdapter();
+
+  /**
+   * Use a float array in the array API.
+   */
+  public static final NumberArrayAdapter<Float, float[]> FLOATARRAYADAPTER = new FloatArrayAdapter();
+
+  /**
+   * Use a Trove double list as array.
+   */
+  public static final TDoubleListAdapter TDOUBLELISTADAPTER = new TDoubleListAdapter();
+
+  /**
+   * Use ArrayDBIDs as array.
+   */
+  public static final ArrayDBIDsAdapter ARRAYDBIDADAPTER = new ArrayDBIDsAdapter();
+
+  /**
+   * Cast the static instance.
+   * 
+   * @param dummy Dummy variable, for type inference
+   * @return Static instance
+   */
+  @SuppressWarnings("unchecked")
+  public static <T> ArrayAdapter<T, List<? extends T>> listAdapter(List<? extends T> dummy) {
+    return (ListArrayAdapter<T>) LISTADAPTER;
+  }
+
+  /**
+   * Cast the static instance.
+   * 
+   * @param dummy Dummy variable, for type inference
+   * @return Static instance
+   */
+  @SuppressWarnings("unchecked")
+  public static <T extends Number> NumberArrayAdapter<T, List<? extends T>> numberListAdapter(List<? extends T> dummy) {
+    return (NumberListArrayAdapter<T>) NUMBERLISTADAPTER;
+  }
+
+  /**
+   * Get the static instance.
+   * 
+   * @param dummy Dummy object for type inference
+   * @return Static instance
+   */
+  @SuppressWarnings("unchecked")
+  public static <T> IdentityArrayAdapter<T> identityAdapter(T dummy) {
+    return (IdentityArrayAdapter<T>) IDENTITYADAPTER;
+  }
+
+  /**
+   * Get the static instance.
+   * 
+   * @param prototype Prototype value, for type inference
+   * @return Instance
+   */
+  @SuppressWarnings("unchecked")
+  public static <F> FeatureVectorAdapter<F> featureVectorAdapter(FeatureVector<?, F> prototype) {
+    return (FeatureVectorAdapter<F>) FEATUREVECTORADAPTER;
+  }
+
+  /**
+   * Get the static instance.
+   * 
+   * @param prototype Prototype value, for type inference
+   * @return Instance
+   */
+  @SuppressWarnings("unchecked")
+  public static <N extends Number> NumberVectorAdapter<N> numberVectorAdapter(NumberVector<?, N> prototype) {
+    return (NumberVectorAdapter<N>) NUMBERVECTORADAPTER;
+  }
+
+  /**
+   * Get the adapter for double arrays.
+   * 
+   * @return double array adapter
+   */
+  public static NumberArrayAdapter<Double, double[]> doubleArrayAdapter() {
+    return DOUBLEARRAYADAPTER;
+  }
+
+  /**
+   * Returns the index of the maximum of the given values. If no value is bigger
+   * than the first, the index of the first entry is returned.
+   * 
+   * @param <A> array type
+   * @param array Array to inspect
+   * @param adapter API adapter class
+   * @return the index of the maximum in the given values
+   * @throws IndexOutOfBoundsException if the length of the array is 0.
+   */
+  public static <A> int getIndexOfMaximum(A array, NumberArrayAdapter<?, A> adapter) throws IndexOutOfBoundsException {
+    final int size = adapter.size(array);
+    int index = 0;
+    double max = adapter.getDouble(array, 0);
+    for(int i = 1; i < size; i++) {
+      double val = adapter.getDouble(array, i);
+      if(val > max) {
+        max = val;
+        index = i;
+      }
+    }
+    return index;
+  }
+
+  /**
+   * Returns the index of the maximum of the given values. If no value is bigger
+   * than the first, the index of the first entry is returned.
+   * 
+   * @param array Array to inspect
+   * @return the index of the maximum in the given values
+   * @throws IndexOutOfBoundsException if the length of the array is 0.
+   */
+  public static int getIndexOfMaximum(double[] array) throws IndexOutOfBoundsException {
+    return getIndexOfMaximum(array, DOUBLEARRAYADAPTER);
+  }
+
+  /**
+   * Convert a numeric array-like to a <code>double[]</code>
+   * 
+   * @param array Array-like
+   * @param adapter Adapter
+   * @return primitive double array
+   */
+  public static <A> double[] toPrimitiveDoubleArray(A array, NumberArrayAdapter<?, ? super A> adapter) {
+    double[] ret = new double[adapter.size(array)];
+    for(int i = 0; i < ret.length; i++) {
+      ret[i] = adapter.getDouble(array, i);
+    }
+    return ret;
+  }
+
+  /**
+   * Convert a list of numbers to <code>double[]</code>.
+   * 
+   * @param array List of numbers
+   * @return double array
+   */
+  public static double[] toPrimitiveDoubleArray(List<? extends Number> array) {
+    return toPrimitiveDoubleArray(array, NUMBERLISTADAPTER);
+  }
+
+  /**
+   * Convert a number vector to <code>double[]</code>.
+   * 
+   * @param obj Object to convert
+   * @return primitive double array
+   */
+  public static <N extends Number> double[] toPrimitiveDoubleArray(NumberVector<?, N> obj) {
+    return toPrimitiveDoubleArray(obj, numberVectorAdapter(obj));
+  }
+
+  /**
+   * Convert a numeric array-like to a <code>float[]</code>
+   * 
+   * @param array Array-like
+   * @param adapter Adapter
+   * @return primitive float array
+   */
+  public static <A> float[] toPrimitiveFloatArray(A array, NumberArrayAdapter<?, ? super A> adapter) {
+    float[] ret = new float[adapter.size(array)];
+    for(int i = 0; i < ret.length; i++) {
+      ret[i] = adapter.getFloat(array, i);
+    }
+    return ret;
+  }
+
+  /**
+   * Convert a list of numbers to <code>float[]</code>.
+   * 
+   * @param array List of numbers
+   * @return float array
+   */
+  public static float[] toPrimitiveFloatArray(List<? extends Number> array) {
+    return toPrimitiveFloatArray(array, NUMBERLISTADAPTER);
+  }
+
+  /**
+   * Convert a number vector to <code>float[]</code>.
+   * 
+   * @param obj Object to convert
+   * @return primitive float array
+   */
+  public static <N extends Number> float[] toPrimitiveFloatArray(NumberVector<?, N> obj) {
+    return toPrimitiveFloatArray(obj, numberVectorAdapter(obj));
+  }
+}
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