1 files changed, 19 insertions, 8 deletions
diff --git a/src/de/lmu/ifi/dbs/elki/utilities/optionhandling/constraints/OnlyOneIsAllowedToBeSetGlobalConstraint.java b/src/de/lmu/ifi/dbs/elki/utilities/optionhandling/constraints/OnlyOneIsAllowedToBeSetGlobalConstraint.java
index 22db8511..bdd55572 100644
--- a/src/de/lmu/ifi/dbs/elki/utilities/optionhandling/constraints/OnlyOneIsAllowedToBeSetGlobalConstraint.java
+++ b/src/de/lmu/ifi/dbs/elki/utilities/optionhandling/constraints/OnlyOneIsAllowedToBeSetGlobalConstraint.java
@@ -4,7 +4,7 @@ package de.lmu.ifi.dbs.elki.utilities.optionhandling.constraints;
  This file is part of ELKI:
  Environment for Developing KDD-Applications Supported by Index-Structures
 
- Copyright (C) 2012
+ Copyright (C) 2013
  Ludwig-Maximilians-Universität München
  Lehr- und Forschungseinheit für Datenbanksysteme
  ELKI Development Team
@@ -24,6 +24,7 @@ package de.lmu.ifi.dbs.elki.utilities.optionhandling.constraints;
  */
 
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
 
 import de.lmu.ifi.dbs.elki.utilities.optionhandling.OptionUtil;
@@ -55,17 +56,27 @@ public class OnlyOneIsAllowedToBeSetGlobalConstraint implements GlobalParameterC
   }
 
   /**
+   * Constructs a global parameter constraint for testing if only one parameter
+   * of a list of parameters is set.
+   * 
+   * @param params list of parameters to be checked
+   */
+  public OnlyOneIsAllowedToBeSetGlobalConstraint(Parameter<?>... params) {
+    parameters = Arrays.asList(params);
+  }
+
+  /**
    * Checks if only one parameter of a list of parameters is set. If not, a
    * parameter exception is thrown.
    */
   @Override
   public void test() throws ParameterException {
-    ArrayList<String> set = new ArrayList<String>();
-    for(Parameter<?> p : parameters) {
-      if(p.isDefined()) {
+    ArrayList<String> set = new ArrayList<>();
+    for (Parameter<?> p : parameters) {
+      if (p.isDefined()) {
         // FIXME: Retire the use of this constraint for Flags!
-        if(p instanceof Flag) {
-          if (((Flag)p).getValue().booleanValue()) {
+        if (p instanceof Flag) {
+          if (((Flag) p).getValue().booleanValue()) {
             set.add(p.getName());
           }
         } else {
@@ -73,7 +84,7 @@ public class OnlyOneIsAllowedToBeSetGlobalConstraint implements GlobalParameterC
         }
       }
     }
-    if(set.size() > 1) {
+    if (set.size() > 1) {
       throw new WrongParameterValueException("Global Parameter Constraint Error.\n" + "Only one of the parameters " + OptionUtil.optionsNamesToString(parameters) + " is allowed to be set. " + "Parameters currently set: " + set.toString());
     }
   }
@@ -82,4 +93,4 @@ public class OnlyOneIsAllowedToBeSetGlobalConstraint implements GlobalParameterC
   public String getDescription() {
     return "Only one of the parameters " + OptionUtil.optionsNamesToString(parameters) + " is allowed to be set.";
   }
-}
-\ No newline at end of file
+}