Import Upstream version 0.6.5~20141030

1 files changed, 218 insertions, 0 deletions

diff --git a/src/de/lmu/ifi/dbs/elki/datasource/filter/typeconversions/ClassLabelFromPatternFilter.java b/src/de/lmu/ifi/dbs/elki/datasource/filter/typeconversions/ClassLabelFromPatternFilter.java
new file mode 100644
index 00000000..3ced4e2f
--- /dev/null
+++ b/src/de/lmu/ifi/dbs/elki/datasource/filter/typeconversions/ClassLabelFromPatternFilter.java
@@ -0,0 +1,218 @@
+package de.lmu.ifi.dbs.elki.datasource.filter.typeconversions;
+
+/*
+ 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 gnu.trove.list.array.TIntArrayList;
+
+import java.util.regex.Pattern;
+
+import de.lmu.ifi.dbs.elki.data.LabelList;
+import de.lmu.ifi.dbs.elki.data.SimpleClassLabel;
+import de.lmu.ifi.dbs.elki.data.type.SimpleTypeInformation;
+import de.lmu.ifi.dbs.elki.data.type.TypeUtil;
+import de.lmu.ifi.dbs.elki.datasource.bundle.BundleMeta;
+import de.lmu.ifi.dbs.elki.datasource.filter.AbstractStreamFilter;
+import de.lmu.ifi.dbs.elki.utilities.Alias;
+import de.lmu.ifi.dbs.elki.utilities.optionhandling.AbstractParameterizer;
+import de.lmu.ifi.dbs.elki.utilities.optionhandling.OptionID;
+import de.lmu.ifi.dbs.elki.utilities.optionhandling.parameterization.Parameterization;
+import de.lmu.ifi.dbs.elki.utilities.optionhandling.parameters.PatternParameter;
+import de.lmu.ifi.dbs.elki.utilities.optionhandling.parameters.StringParameter;
+
+/**
+ * Streaming filter to derive an outlier class label.
+ * 
+ * @author Erich Schubert
+ */
+@Alias({ "de.lmu.ifi.dbs.elki.datasource.filter.normalization.ClassLabelFromPatternFilter" })
+public class ClassLabelFromPatternFilter extends AbstractStreamFilter {
+  /**
+   * Current meta data
+   */
+  BundleMeta meta = null;
+
+  /**
+   * Bitset of label columns
+   */
+  TIntArrayList labelcols = new TIntArrayList();
+
+  /**
+   * Label to return for positive matches.
+   */
+  SimpleClassLabel positive;
+
+  /**
+   * Label to return for negative matches.
+   */
+  SimpleClassLabel negative;
+
+  /**
+   * Matching pattern.
+   */
+  Pattern pattern;
+
+  /**
+   * Constructor.
+   * 
+   * @param pattern Pattern for matching
+   * @param positive Positive label
+   * @param negative Negative label
+   */
+  public ClassLabelFromPatternFilter(Pattern pattern, String positive, String negative) {
+    super();
+    this.pattern = pattern;
+    this.positive = new SimpleClassLabel(positive);
+    this.negative = new SimpleClassLabel(negative);
+  }
+
+  /**
+   * Constructor.
+   * 
+   * @param pattern Pattern for matching
+   * @param positive Positive label
+   * @param negative Negative label
+   */
+  public ClassLabelFromPatternFilter(Pattern pattern, SimpleClassLabel positive, SimpleClassLabel negative) {
+    super();
+    this.pattern = pattern;
+    this.positive = positive;
+    this.negative = negative;
+  }
+
+  @Override
+  public BundleMeta getMeta() {
+    if(meta == null) {
+      // Rebuild metadata.
+      BundleMeta origmeta = source.getMeta();
+      meta = new BundleMeta(origmeta.size() + 1);
+      meta.add(TypeUtil.SIMPLE_CLASSLABEL);
+      labelcols.clear();
+      for(int i = 0; i < origmeta.size(); i++) {
+        final SimpleTypeInformation<?> orig = origmeta.get(i);
+        if(TypeUtil.GUESSED_LABEL.isAssignableFromType(orig)) {
+          labelcols.add(i);
+        }
+        meta.add(orig);
+      }
+    }
+    return meta;
+  }
+
+  @Override
+  public Object data(int rnum) {
+    if(rnum > 0) {
+      return source.data(rnum - 1);
+    }
+    if(meta == null) {
+      getMeta(); // Trigger build
+    }
+    for(int i = 0; i < labelcols.size(); i++) {
+      Object o = source.data(labelcols.get(i));
+      if(o == null) {
+        continue;
+      }
+      if(o instanceof LabelList) {
+        final LabelList ll = (LabelList) o;
+        for(int j = 0; j < ll.size(); j++) {
+          if(pattern.matcher(ll.get(j)).find()) {
+            return positive;
+          }
+        }
+        continue;
+      }
+      if(pattern.matcher(o.toString()).find()) {
+        return positive;
+      }
+    }
+    return negative;
+  }
+
+  @Override
+  public Event nextEvent() {
+    final Event ev = source.nextEvent();
+    if(Event.META_CHANGED.equals(ev)) {
+      meta = null;
+    }
+    return ev;
+  }
+
+  /**
+   * Parameterization class.
+   * 
+   * @author Erich Schubert
+   * 
+   * @apiviz.exclude
+   */
+  public static class Parameterizer extends AbstractParameterizer {
+    /**
+     * Pattern for recognizing positive objects.
+     */
+    public static final OptionID PATTERN_ID = new OptionID("class.pattern", "Regular expression to identify positive objects.");
+
+    /**
+     * Class label to assign to positive instances.
+     */
+    public static final OptionID POSITIVE_ID = new OptionID("class.positive", "Class label to use for positive instances.");
+
+    /**
+     * Class label to assign to negative instances.
+     */
+    public static final OptionID NEGATIVE_ID = new OptionID("class.negative", "Class label to use for negative instances.");
+
+    /**
+     * Matching pattern.
+     */
+    Pattern pattern;
+
+    /**
+     * Names for positive and negative classes.
+     */
+    String positive, negative;
+
+    @Override
+    protected void makeOptions(Parameterization config) {
+      super.makeOptions(config);
+
+      PatternParameter patternP = new PatternParameter(PATTERN_ID);
+      if(config.grab(patternP)) {
+        pattern = patternP.getValue();
+      }
+
+      StringParameter positiveP = new StringParameter(POSITIVE_ID, "positive");
+      if(config.grab(positiveP)) {
+        positive = positiveP.getValue();
+      }
+
+      StringParameter negativeP = new StringParameter(NEGATIVE_ID, "negative");
+      if(config.grab(negativeP)) {
+        negative = negativeP.getValue();
+      }
+    }
+
+    @Override
+    protected ClassLabelFromPatternFilter makeInstance() {
+      return new ClassLabelFromPatternFilter(pattern, positive, negative);
+    }
+  }
+}