Merge pull request #370 from rubenporras/ReduceOverheadOfFiringValida…

…tions

Reduce overhead of firing validations

com.avaloq.tools.ddk.xtext.valid.generator/src/com/avaloq/tools/ddk/xtext/valid/generator/JavaValidators.xpt

@@ -119,8 +119,9 @@ abstract public class 
     final public void check�checkKind.toString().toFirstUpper()��contextType.name�(�contextType.name� context) {
         ICheckSequencer sequencer = pre�checkKind.toString().toFirstUpper()�Check�contextType.name�(context);
         assert sequencer != null : "Sequencer must be initialized";
+        boolean isDebugEnabled = LOGGER.isDebugEnabled();
 �FOREACH validModel.getAllNativeRules(checkKind).contexts.select(c| c.contextType == contextType).sortBy(c|c.name()) AS context -�
-        if (LOGGER.isDebugEnabled()) {
+        if (isDebugEnabled) {
             LOGGER.debug(NLS.bind("Performing check:{0} on {1}", "�context.name()�", context));
         }
         check�context.name()�(context, sequencer);
@@ -129,13 +130,13 @@ abstract public class 
     }
 
     /**
-     * Returns a check sequencer for the given Check (Kind/Context) family.
+     * Returns the default check sequencer for the given Check (Kind/Context) family.
      *
      * @param context the context object
-     * @return a check sequencer (possibly enriched with user data)
+     * @return the default check sequencer
      */
     public ICheckSequencer pre�checkKind.toString().toFirstUpper()�Check�contextType.name�(�contextType.name� context) {
-        return new DefaultCheckSequencer();
+        return DefaultCheckSequencer.getInstance();
     }
 
     /**

com.avaloq.tools.ddk.xtext/src/com/avaloq/tools/ddk/xtext/validation/DefaultCheckSequencer.java

@@ -15,6 +15,20 @@
  */
 public class DefaultCheckSequencer implements ICheckSequencer {
 
+  /**
+   * The singletone.
+   */
+  private static final DefaultCheckSequencer INSTANCE = new DefaultCheckSequencer();
+
+  /**
+   * The singletone instance for the default check sequencer.
+   *
+   * @return the singletone instance
+   */
+  public static DefaultCheckSequencer getInstance() {
+    return INSTANCE;
+  }
+
   /**
    * Default implementation for canContinue.
    *