1 files changed, 227 insertions, 0 deletions
diff --git a/src/de/lmu/ifi/dbs/elki/database/ids/integer/DoubleIntegerDBIDPairList.java b/src/de/lmu/ifi/dbs/elki/database/ids/integer/DoubleIntegerDBIDPairList.java
new file mode 100644
index 00000000..bee9d47d
--- /dev/null
+++ b/src/de/lmu/ifi/dbs/elki/database/ids/integer/DoubleIntegerDBIDPairList.java
@@ -0,0 +1,227 @@
+package de.lmu.ifi.dbs.elki.database.ids.integer;
+
+/*
+ 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 java.util.Arrays;
+
+import de.lmu.ifi.dbs.elki.database.ids.DBIDRef;
+import de.lmu.ifi.dbs.elki.database.ids.DoubleDBIDListIter;
+import de.lmu.ifi.dbs.elki.database.ids.DoubleDBIDPair;
+import de.lmu.ifi.dbs.elki.database.ids.ModifiableDoubleDBIDList;
+
+/**
+ * Class to store double distance, integer DBID results.
+ * 
+ * Currently unused. Needs benchmarking.
+ * 
+ * @author Erich Schubert
+ */
+class DoubleIntegerDBIDPairList implements ModifiableDoubleDBIDList, IntegerDBIDs {
+  /**
+   * The size
+   */
+  int size;
+
+  /**
+   * Distance values
+   */
+  DoubleIntegerDBIDPair[] data;
+
+  /**
+   * Constructor.
+   */
+  protected DoubleIntegerDBIDPairList() {
+    super();
+    this.data = new DoubleIntegerDBIDPair[21];
+  }
+
+  /**
+   * Constructor.
+   * 
+   * @param size Initial size
+   */
+  protected DoubleIntegerDBIDPairList(int size) {
+    super();
+    if(size > 0) {
+      size = 21;
+    }
+    this.data = new DoubleIntegerDBIDPair[size];
+  }
+
+  @Override
+  public Itr iter() {
+    return new Itr();
+  }
+
+  @Override
+  public boolean contains(DBIDRef o) {
+    final int q = o.internalGetIndex();
+    for(int i = 0; i < size; i++) {
+      if(q == data[i].internalGetIndex()) {
+        return true;
+      }
+    }
+    return false;
+  }
+
+  @Override
+  public boolean isEmpty() {
+    return size == 0;
+  }
+
+  @Override
+  public int size() {
+    return size;
+  }
+
+  @Override
+  public DoubleIntegerDBIDPair get(int index) {
+    return data[index];
+  }
+
+  /**
+   * Add an entry, consisting of distance and internal index.
+   * 
+   * @param pair entry
+   */
+  protected void addInternal(DoubleIntegerDBIDPair pair) {
+    if(size == data.length) {
+      DoubleIntegerDBIDPair[] old = data;
+      data = new DoubleIntegerDBIDPair[(data.length << 1) + 1];
+      System.arraycopy(old, 0, data, 0, old.length);
+    }
+    data[size++] = pair;
+  }
+
+  @Override
+  public void add(double dist, DBIDRef id) {
+    addInternal(new DoubleIntegerDBIDPair(dist, id.internalGetIndex()));
+  }
+
+  @Override
+  public void add(DoubleDBIDPair pair) {
+    if(pair instanceof DoubleIntegerDBIDPair) {
+      addInternal((DoubleIntegerDBIDPair) pair);
+    }
+    else {
+      addInternal(new DoubleIntegerDBIDPair(pair.doubleValue(), pair.internalGetIndex()));
+    }
+  }
+
+  @Override
+  public void clear() {
+    Arrays.fill(data, null);
+    size = 0;
+  }
+
+  @Override
+  public void sort() {
+    Arrays.sort(data, 0, size);
+  }
+
+  /**
+   * Reverse the list.
+   */
+  protected void reverse() {
+    for(int i = 0, j = size - 1; i < j; i++, j--) {
+      DoubleIntegerDBIDPair tmpd = data[j];
+      data[j] = data[i];
+      data[i] = tmpd;
+    }
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder buf = new StringBuilder();
+    buf.append("kNNList[");
+    for(DoubleDBIDListIter iter = this.iter(); iter.valid();) {
+      buf.append(iter.doubleValue()).append(':').append(iter.internalGetIndex());
+      iter.advance();
+      if(iter.valid()) {
+        buf.append(',');
+      }
+    }
+    buf.append(']');
+    return buf.toString();
+  }
+
+  /**
+   * List iterator.
+   * 
+   * @author Erich Schubert
+   * 
+   * @apiviz.exclude
+   */
+  private class Itr implements DoubleDBIDListIter, IntegerDBIDArrayIter {
+    int pos = 0;
+
+    @Override
+    public boolean valid() {
+      return pos < size && pos >= 0;
+    }
+
+    @Override
+    public Itr advance() {
+      ++pos;
+      return this;
+    }
+
+    @Override
+    public int getOffset() {
+      return pos;
+    }
+
+    @Override
+    public Itr advance(int count) {
+      pos += count;
+      return this;
+    }
+
+    @Override
+    public Itr retract() {
+      pos--;
+      return this;
+    }
+
+    @Override
+    public Itr seek(int off) {
+      pos = off;
+      return this;
+    }
+
+    @Override
+    public int internalGetIndex() {
+      return data[pos].internalGetIndex();
+    }
+
+    @Override
+    public double doubleValue() {
+      return data[pos].doubleValue();
+    }
+
+    @Override
+    public DoubleDBIDPair getPair() {
+      return data[pos];
+    }
+  }
+}