#566 - Refactor internals - SpiExpression, add prepareExpression() to merge queryAutoTuneHash() and queryPlanHash() - initial

src/main/java/com/avaje/ebeaninternal/server/expression/NonPrepareExpression.java

@@ -0,0 +1,15 @@
+package com.avaje.ebeaninternal.server.expression;
+
+import com.avaje.ebean.event.BeanQueryRequest;
+import com.avaje.ebeaninternal.api.SpiExpression;
+
+/**
+ * Base abstract expression that does nothing for prepareExpression().
+ */
+abstract class NonPrepareExpression implements SpiExpression {
+
+  @Override
+  public void prepareExpression(BeanQueryRequest<?> request) {
+    // do nothing
+  }
+}