Import Upstream version 0.7.0

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diff --git a/addons/batikvis/src/main/java/de/lmu/ifi/dbs/elki/visualization/projector/ParallelPlotFactory.java b/addons/batikvis/src/main/java/de/lmu/ifi/dbs/elki/visualization/projector/ParallelPlotFactory.java
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+++ b/addons/batikvis/src/main/java/de/lmu/ifi/dbs/elki/visualization/projector/ParallelPlotFactory.java
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+package de.lmu.ifi.dbs.elki.visualization.projector;
+
+/*
+ This file is part of ELKI:
+ Environment for Developing KDD-Applications Supported by Index-Structures
+
+ Copyright (C) 2015
+ 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 de.lmu.ifi.dbs.elki.data.NumberVector;
+import de.lmu.ifi.dbs.elki.data.spatial.SpatialComparable;
+import de.lmu.ifi.dbs.elki.data.type.TypeUtil;
+import de.lmu.ifi.dbs.elki.data.uncertain.UncertainObject;
+import de.lmu.ifi.dbs.elki.database.relation.Relation;
+import de.lmu.ifi.dbs.elki.database.relation.RelationUtil;
+import de.lmu.ifi.dbs.elki.utilities.datastructures.hierarchy.FilteredIter;
+import de.lmu.ifi.dbs.elki.utilities.datastructures.hierarchy.Hierarchy;
+import de.lmu.ifi.dbs.elki.visualization.VisualizerContext;
+import de.lmu.ifi.dbs.elki.visualization.VisualizationTree;
+
+/**
+ * Produce parallel axes projections.
+ *
+ * @author Robert Rödler
+ *
+ * @apiviz.has ParallelPlotProjector
+ */
+public class ParallelPlotFactory implements ProjectorFactory {
+  /**
+   * Constructor.
+   */
+  public ParallelPlotFactory() {
+    super();
+  }
+
+  @Override
+  public void processNewResult(VisualizerContext context, Object start) {
+    Hierarchy.Iter<Relation<?>> it = VisualizationTree.filterResults(context, start, Relation.class);
+    candidate: for(; it.valid(); it.advance()) {
+      Relation<?> rel = it.get();
+      // TODO: multi-relational parallel plots?
+      final int dim = dimensionality(rel);
+      if(dim <= 1) {
+        continue;
+      }
+      // Do not enable nested relations by default:
+      Hierarchy.Iter<Relation<?>> it2 = new FilteredIter<>(context.getHierarchy().iterAncestors(rel), Relation.class);
+      for(; it2.valid(); it2.advance()) {
+        // Parent relation
+        final Relation<?> rel2 = (Relation<?>) it2.get();
+        final int odim = dimensionality(rel2);
+        if(odim == dim) {
+          // TODO: add Actions instead?
+          continue candidate;
+        }
+      }
+      @SuppressWarnings("unchecked")
+      Relation<SpatialComparable> vrel = (Relation<SpatialComparable>) rel;
+      ParallelPlotProjector<SpatialComparable> proj = new ParallelPlotProjector<>(vrel);
+      context.addVis(vrel, proj);
+    }
+  }
+
+  private int dimensionality(Relation<?> rel) {
+    if(TypeUtil.NUMBER_VECTOR_FIELD.isAssignableFromType(rel.getDataTypeInformation())) {
+      @SuppressWarnings("unchecked")
+      Relation<NumberVector> vrel = (Relation<NumberVector>) rel;
+      return RelationUtil.dimensionality(vrel);
+    }
+    if(TypeUtil.UNCERTAIN_OBJECT_FIELD.isAssignableFromType(rel.getDataTypeInformation())) {
+      @SuppressWarnings("unchecked")
+      Relation<UncertainObject> vrel = (Relation<UncertainObject>) rel;
+      return RelationUtil.dimensionality(vrel);
+    }
+    // TODO: allow other spatial objects of fixed dimensionality!
+    return 0;
+  }
+}
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