1 files changed, 106 insertions, 0 deletions
diff --git a/src/de/lmu/ifi/dbs/elki/database/relation/ConvertToStringView.java b/src/de/lmu/ifi/dbs/elki/database/relation/ConvertToStringView.java
new file mode 100644
index 00000000..ac3cf82f
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+++ b/src/de/lmu/ifi/dbs/elki/database/relation/ConvertToStringView.java
@@ -0,0 +1,106 @@
+package de.lmu.ifi.dbs.elki.database.relation;
+/*
+This file is part of ELKI:
+Environment for Developing KDD-Applications Supported by Index-Structures
+
+Copyright (C) 2011
+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.type.SimpleTypeInformation;
+import de.lmu.ifi.dbs.elki.data.type.TypeUtil;
+import de.lmu.ifi.dbs.elki.database.Database;
+import de.lmu.ifi.dbs.elki.database.ids.DBID;
+import de.lmu.ifi.dbs.elki.database.ids.DBIDs;
+import de.lmu.ifi.dbs.elki.result.AbstractHierarchicalResult;
+import de.lmu.ifi.dbs.elki.utilities.iterator.IterableIterator;
+
+/**
+ * Representation adapter that uses toString() to produce a string
+ * representation.
+ * 
+ * @author Erich Schubert
+ */
+public class ConvertToStringView extends AbstractHierarchicalResult implements Relation<String> {
+  /**
+   * The database we use
+   */
+  final Relation<?> existing;
+
+  /**
+   * Constructor.
+   * 
+   * @param existing Existing representation
+   */
+  public ConvertToStringView(Relation<?> existing) {
+    super();
+    this.existing = existing;
+  }
+
+  @Override
+  public Database getDatabase() {
+    return existing.getDatabase();
+  }
+
+  @Override
+  public String get(DBID id) {
+    return existing.get(id).toString();
+  }
+
+  @SuppressWarnings("unused")
+  @Override
+  public void set(DBID id, String val) {
+    throw new UnsupportedOperationException("Covnersion representations are not writable!");
+  }
+
+  @SuppressWarnings("unused")
+  @Override
+  public void delete(DBID id) {
+    throw new UnsupportedOperationException("Covnersion representations are not writable!");
+  }
+
+  @Override
+  public DBIDs getDBIDs() {
+    return existing.getDBIDs();
+  }
+
+  @Override
+  public IterableIterator<DBID> iterDBIDs() {
+    return existing.iterDBIDs();
+  }
+
+  @Override
+  public int size() {
+    return existing.size();
+  }
+
+  @Override
+  public SimpleTypeInformation<String> getDataTypeInformation() {
+    return TypeUtil.STRING;
+  }
+
+  @Override
+  public String getLongName() {
+    return "toString(" + existing.getLongName() + ")";
+  }
+
+  @Override
+  public String getShortName() {
+    return "tostring-" + existing.getShortName();
+  }
+}
+\ No newline at end of file