测试Oracle兼容性，需要另行实现，后见wiki

examples/quickstart/src/main/java/org/springside/examples/quickstart/entity/IdEntity.java

@@ -9,7 +9,7 @@ import javax.persistence.MappedSuperclass;
  * 统一定义id的entity基类.
  * 
  * 基类统一定义id的属性名称、数据类型、列名映射及生成策略.
- * 子类可重载getId()函数重定义id的列名映射和生成策略.
+ * Oracle需要每个Entity独立定义id的SEQUCENCE时，不继承于本类而改为实现一个Idable的接口。
  * 
  * @author calvin
  */
@@ -21,9 +21,6 @@ public abstract class IdEntity {
 
 	@Id
 	@GeneratedValue(strategy = GenerationType.IDENTITY)
-	//@GeneratedValue(strategy = GenerationType.SEQUENCE)
-	//@GeneratedValue(generator = "system-uuid")
-	//@GenericGenerator(name = "system-uuid", strategy = "uuid")
 	public Long getId() {
 		return id;
 	}

examples/quickstart/src/main/java/org/springside/examples/quickstart/entity/Task.java

@@ -34,6 +34,7 @@ public class Task extends IdEntity {
 		this.description = description;
 	}
 
+	//基于USER_ID列的多对一关系定义
 	@ManyToOne
 	@JoinColumn(name = "USER_ID")
 	public User getUser() {

examples/quickstart/src/main/java/org/springside/examples/quickstart/entity/User.java

@@ -13,7 +13,6 @@ import org.hibernate.validator.constraints.NotBlank;
 import com.fasterxml.jackson.annotation.JsonIgnore;
 import com.google.common.collect.ImmutableList;
 
-//JPA标识
 @Entity
 @Table(name = "SS_USER")
 public class User extends IdEntity {

examples/showcase/src/main/java/org/springside/examples/showcase/entity/IdEntity.java

@@ -5,15 +5,6 @@ import javax.persistence.GenerationType;
 import javax.persistence.Id;
 import javax.persistence.MappedSuperclass;
 
-/**
- * 统一定义id的entity基类.
- * 
- * 基类统一定义id的属性名称、数据类型、列名映射及生成策略.
- * 子类可重载getId()函数重定义id的列名映射和生成策略.
- * 
- * @author calvin
- */
-//JPA Entity基类的标识
 @MappedSuperclass
 public abstract class IdEntity {