1 files changed, 48 insertions, 0 deletions
diff --git a/rba.model.core/src/rba/core/generator/util/value/ComparisonOperatorEvaluator.java b/rba.model.core/src/rba/core/generator/util/value/ComparisonOperatorEvaluator.java
new file mode 100644
index 0000000..548183f
--- /dev/null
+++ b/rba.model.core/src/rba/core/generator/util/value/ComparisonOperatorEvaluator.java
@@ -0,0 +1,48 @@
+package rba.core.generator.util.value;
+
+import org.eclipse.emf.common.util.EList;
+import org.eclipse.emf.ecore.EObject;
+
+import rba.core.ComparisonOperator;
+import rba.core.Expression;
+import rba.core.RuleObject;
+
+public abstract class ComparisonOperatorEvaluator<T extends RuleObject> extends ExpressionEvaluator<T> implements ComparisonOperator {
+
+    protected ComparisonOperator operator;
+
+    protected T subject;
+
+    protected ComparisonOperatorEvaluator(ComparisonOperator o) {
+        super(o);
+        operator = o;
+        EObject container = o.eContainer();
+        while (!(container instanceof RuleObject)) {
+            container = container.eContainer();
+            if (container == null)
+                break;
+        }
+        if (container != null) {
+            subject = (T) container;
+        }
+    }
+
+    abstract public boolean evaluate(ValueSortedList<T> list);
+
+    /**
+     * @param list
+     * @return -1 if it has no suggestion 9999 implies MAX group (last index)
+     */
+    abstract public int suggestIndex(ValueSortedList<T> list);
+
+    @Override
+    public EList<Expression> getOperand() {
+        return operator.getOperand();
+    }
+
+    @Override
+    public String getSymbol() {
+        return operator.getSymbol();
+    }
+
+}