Bael 1908 - Guide to SqlResultSetMapping (#4586)

* Commit for Eval Article pull request * Revert "Commit for Eval Article pull request" * BAEL-1908 Initial Commit
2018-07-08 07:44:42 -04:00
parent 28166a73de
commit f3237ef2c5
8 changed files with 281 additions and 0 deletions
@@ -0,0 +1,43 @@
+package com.baeldung.sqlresultsetmapping;
+
+import javax.persistence.*;
+
+
+@SqlResultSetMapping(
+        name="EmployeeResult",
+        entities={
+                @EntityResult(
+                        entityClass = com.baeldung.sqlresultsetmapping.Employee.class,
+                        fields={@FieldResult(name="id",column="employeeNumber"),
+                                 @FieldResult(name="name", column="name")}
+                )
+        }
+)
+@NamedNativeQuery(
+        name="Employees",
+        query="SELECT id as employeeNumber, name FROM EMPLOYEE",
+        resultSetMapping = "EmployeeResult"
+)
+@Entity
+public class Employee {
+
+    @Id
+    private Long id;
+    private String name;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+}
@@ -0,0 +1,80 @@
+package com.baeldung.sqlresultsetmapping;
+
+import javax.persistence.*;
+
+@SqlResultSetMappings(value = {
+    @SqlResultSetMapping(name = "ScheduleResult",
+        classes = { @ConstructorResult(targetClass = com.baeldung.sqlresultsetmapping.ScheduledDay.class,
+        columns = { @ColumnResult(name = "id", type = Long.class),
+                    @ColumnResult(name = "employeeId", type = Long.class),
+                    @ColumnResult(name = "hourIn"),
+                    @ColumnResult(name = "hourOut"),
+                    @ColumnResult(name = "dayOfWeek") }) }),
+    @SqlResultSetMapping(name = "FridayEmployeeResult",
+                         columns = { @ColumnResult(name = "employeeId") }),
+    @SqlResultSetMapping(name = "EmployeeScheduleResults",
+                         entities = { @EntityResult(entityClass = com.baeldung.sqlresultsetmapping.Employee.class),
+                                      @EntityResult(entityClass = com.baeldung.sqlresultsetmapping.ScheduledDay.class)
+    }) })
+@NamedNativeQuery(name = "FridayEmployees",
+        query = "SELECT employeeId FROM schedule_days WHERE dayOfWeek = 'FRIDAY'",
+        resultSetMapping = "FridayEmployeeResult")
+
+@NamedNativeQuery(name = "Schedules",
+        query = "SELECT * FROM schedule_days WHERE hourIn = 8",
+        resultSetMapping = "ScheduleResult")
+@Entity
+@Table(name = "SCHEDULE_DAYS")
+public class ScheduledDay {
+
+    @Id
+    @GeneratedValue
+    private Long id;
+    private Long employeeId;
+    private Integer hourIn;
+    private Integer hourOut;
+    private String dayOfWeek;
+
+    public ScheduledDay() {
+    }
+
+    public ScheduledDay(Long id, Long employeeId, Integer hourIn, Integer hourOut, String dayofWeek) {
+        this.id = id;
+        this.employeeId = employeeId;
+        this.hourIn = hourIn;
+        this.hourOut = hourOut;
+        this.dayOfWeek = dayofWeek;
+    }
+
+    public Long getEmployeeId() {
+        return employeeId;
+    }
+
+    public void setEmployeeId(Long employeeId) {
+        this.employeeId = employeeId;
+    }
+
+    public Integer getHourIn() {
+        return hourIn;
+    }
+
+    public void setHourIn(Integer hourIn) {
+        this.hourIn = hourIn;
+    }
+
+    public Integer getHourOut() {
+        return hourOut;
+    }
+
+    public void setHourOut(Integer hourOut) {
+        this.hourOut = hourOut;
+    }
+
+    public String getDayOfWeek() {
+        return dayOfWeek;
+    }
+
+    public void setDayOfWeek(String dayOfWeek) {
+        this.dayOfWeek = dayOfWeek;
+    }
+}
@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<persistence xmlns="http://xmlns.jcp.org/xml/ns/persistence"
+             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+             xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence
+             http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd"
+             version="2.1">
+
+    <persistence-unit name="java-jpa-scheduled-day">
+        <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
+        <class>com.baeldung.sqlresultsetmapping.ScheduledDay</class>
+        <properties>
+            <property name="javax.persistence.jdbc.driver" value="org.h2.Driver" />
+            <property name="javax.persistence.jdbc.url"
+                      value="jdbc:h2:mem:test;INIT=RUNSCRIPT FROM 'classpath:database.sql'" />
+            <property name="javax.persistence.jdbc.user" value="sa" />
+            <property name="javax.persistence.jdbc.password" value="" />
+            <property name="hibernate.dialect" value="org.hibernate.dialect.H2Dialect" />
+            <!--<property name="hibernate.hbm2ddl.auto" value="create-drop" />-->
+            <property name="show_sql" value="true"/>
+            <property name="hibernate.temp.use_jdbc_metadata_defaults" value="false"/>
+        </properties>
+    </persistence-unit>
+</persistence>
@@ -0,0 +1,19 @@
+CREATE TABLE EMPLOYEE
+(id BIGINT,
+ name VARCHAR(10));
+
+INSERT INTO EMPLOYEE VALUES (1, 'JOHN');
+INSERT INTO EMPLOYEE VALUES (2, 'MARY');
+INSERT INTO EMPLOYEE VALUES (3, 'FRANK');
+
+CREATE TABLE SCHEDULE_DAYS
+(id IDENTITY,
+ employeeId BIGINT,
+ hourIn     int,
+ hourOut    int,
+ dayOfWeek  VARCHAR(10));
+
+INSERT INTO SCHEDULE_DAYS (employeeId, hourIn, hourOut, dayOfWeek) VALUES (1, 13, 21, 'FRIDAY');
+INSERT INTO SCHEDULE_DAYS (employeeId, hourIn, hourOut, dayOfWeek) VALUES (2, 8, 4, 'SATURDAY');
+INSERT INTO SCHEDULE_DAYS (employeeId, hourIn, hourOut, dayOfWeek) VALUES (3, 8, 4, 'MONDAY');
+INSERT INTO SCHEDULE_DAYS (employeeId, hourIn, hourOut, dayOfWeek) VALUES (3, 8, 4, 'FRIDAY');