Refactor of query plan hash - add HashQueryPlan, HashQuery etc

src/test/java/com/avaje/tests/query/other/TestQueryPlanHash.java

@@ -0,0 +1,56 @@
+package com.avaje.tests.query.other;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import com.avaje.ebean.Ebean;
+import com.avaje.ebeaninternal.api.HashQueryPlanBuilder;
+import com.avaje.ebeaninternal.api.SpiQuery;
+import com.avaje.tests.model.basic.Order;
+
+public class TestQueryPlanHash {
+
+  @Test
+  public void test() {
+    
+
+    HashQueryPlanBuilder builder1 = new HashQueryPlanBuilder();
+    
+    SpiQuery<Order> squery = (SpiQuery<Order>)Ebean.find(Order.class);
+    squery.queryAutofetchHash(builder1);
+    
+    squery.where().in("id", 1,2,3);
+
+    HashQueryPlanBuilder builder2 = new HashQueryPlanBuilder();
+    squery.queryAutofetchHash(builder2);
+    int q1BindHash = squery.queryBindHash();
+    
+    Assert.assertNotSame(builder1.build(), builder2.build());
+
+    HashQueryPlanBuilder builder3 = new HashQueryPlanBuilder();
+    SpiQuery<Order> squery2 = (SpiQuery<Order>)Ebean.find(Order.class);
+    squery2.where().in("id", 2,2,3);
+
+    squery2.queryAutofetchHash(builder3);
+    int q2BindHash = squery2.queryBindHash();
+
+    Assert.assertEquals(builder3.build(), builder2.build());    
+ 
+    Assert.assertTrue(q1BindHash != q2BindHash);
+
+    HashQueryPlanBuilder builder4 = new HashQueryPlanBuilder();
+    SpiQuery<Order> squery4 = (SpiQuery<Order>)Ebean.find(Order.class);
+    squery4.where().in("name", 2,2,3);
+
+    squery4.queryAutofetchHash(builder4);
+    int q4BindHash = squery4.queryBindHash();
+
+    //different query plan
+    Assert.assertTrue(!builder3.build().equals(builder4.build()));    
+    
+    //same bind hash
+    Assert.assertTrue(q4BindHash == q2BindHash);
+
+  }
+  
+}