#919 - io.ebean package initial

src/main/java/io/ebeaninternal/api/HashQueryPlanBuilder.java

@@ -0,0 +1,96 @@
+package io.ebeaninternal.api;
+
+import java.util.Set;
+
+/**
+ * Used to build HashQueryPlan instances.
+ */
+public class HashQueryPlanBuilder {
+
+  private int planHash;
+
+  private int bindCount;
+
+  public HashQueryPlanBuilder() {
+    this.planHash = 92821;
+  }
+
+  public String toString() {
+    return planHash + ":" + bindCount;
+  }
+
+  /**
+   * Add a class to the hash calculation.
+   */
+  public HashQueryPlanBuilder add(Class<?> cls) {
+    planHash = planHash * 92821 + cls.getName().hashCode();
+    return this;
+  }
+
+  /**
+   * Add an object to the hash calculation.
+   */
+  public HashQueryPlanBuilder add(Object object) {
+    planHash = planHash * 92821 + (object == null ? 0 : object.hashCode());
+    return this;
+  }
+
+  /**
+   * Add the set with order being important.
+   */
+  public HashQueryPlanBuilder addOrdered(Set<?> set) {
+    if (set == null) {
+      add(false);
+    } else {
+      add(true);
+      for (Object o : set) {
+        add(o);
+      }
+    }
+    return this;
+  }
+
+  /**
+   * Add an integer to the hash calculation.
+   */
+  public HashQueryPlanBuilder add(int hashValue) {
+    planHash = planHash * 92821 + (hashValue);
+    return this;
+  }
+
+  /**
+   * Add a boolean to the hash calculation.
+   */
+  public HashQueryPlanBuilder add(boolean booleanValue) {
+    planHash = planHash * 92821 + (booleanValue ? 92821 : 0);
+    return this;
+  }
+
+  /**
+   * Add a number to the bind count for the hash.
+   */
+  public void bind(int extraBindCount) {
+    bindCount += extraBindCount;
+  }
+
+  public void bindIfNotNull(Object someValue) {
+    if (someValue != null) {
+      bindCount++;
+    }
+  }
+
+  /**
+   * Build and return the calculated HashQueryPlan.
+   */
+  public String build() {
+    return planHash + "_" + bindCount;
+  }
+
+  public int getPlanHash() {
+    return planHash;
+  }
+
+  public int getBindCount() {
+    return bindCount;
+  }
+}