initial add of EbeanORM server based on v2.8.1

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

@@ -0,0 +1,66 @@
+package com.avaje.ebeaninternal.server.expression;
+
+import com.avaje.ebean.event.BeanQueryRequest;
+import com.avaje.ebeaninternal.api.ManyWhereJoins;
+import com.avaje.ebeaninternal.api.SpiExpression;
+import com.avaje.ebeaninternal.api.SpiExpressionRequest;
+import com.avaje.ebeaninternal.server.deploy.BeanDescriptor;
+import com.avaje.ebeaninternal.util.DefaultExpressionRequest;
+
+/**
+ * Slightly redundant as Query.setId() ultimately also does the same job.
+ */
+class IdExpression implements SpiExpression {
+
+  private static final long serialVersionUID = -3065936341718489842L;
+
+  private final Object value;
+
+  IdExpression(Object value) {
+    this.value = value;
+  }
+
+  /**
+   * Always returns false.
+   */
+  public void containsMany(BeanDescriptor<?> desc, ManyWhereJoins manyWhereJoin) {
+
+  }
+
+  public void addBindValues(SpiExpressionRequest request) {
+
+    // 'flatten' EmbeddedId and multiple Id cases
+    // into an array of the underlying scalar field values
+    DefaultExpressionRequest r = (DefaultExpressionRequest) request;
+    Object[] bindIdValues = r.getBeanDescriptor().getBindIdValues(value);
+    for (int i = 0; i < bindIdValues.length; i++) {
+      request.addBindValue(bindIdValues[i]);
+    }
+  }
+
+  public void addSql(SpiExpressionRequest request) {
+
+    DefaultExpressionRequest r = (DefaultExpressionRequest) request;
+    String idSql = r.getBeanDescriptor().getIdBinderIdSql();
+
+    request.append(idSql).append(" ");
+  }
+
+  /**
+   * No properties so this is just a unique static number.
+   */
+  public int queryAutoFetchHash() {
+    // this number is unique for a given bean type
+    // which is all that is required
+    return IdExpression.class.getName().hashCode();
+  }
+
+  public int queryPlanHash(BeanQueryRequest<?> request) {
+    return queryAutoFetchHash();
+  }
+
+  public int queryBindHash() {
+    return value.hashCode();
+  }
+
+}