From 4eaaddb6813b0f563c9022e67f7a4d4a2fc8bae1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=A9r=C3=A9my=20Zurcher?= <jeremy@asynk.ch>
Date: Wed, 19 Apr 2017 16:52:31 +0200
Subject: java : MyMyBatis : use java 8 default interface implementation to
 gain free save() and delete() methods

---
 java/MyMyBatis/src/AbstractDAOOperations.java |  2 +-
 java/MyMyBatis/src/AbstractMapper.java        |  2 ++
 java/MyMyBatis/src/AbstractModel.java         | 10 +++++++++-
 java/MyMyBatis/src/Main.java                  |  6 +++---
 java/MyMyBatis/src/Model.java                 | 14 +++++++++++++-
 5 files changed, 28 insertions(+), 6 deletions(-)

diff --git a/java/MyMyBatis/src/AbstractDAOOperations.java b/java/MyMyBatis/src/AbstractDAOOperations.java
index cc183c9..90e0ff4 100644
--- a/java/MyMyBatis/src/AbstractDAOOperations.java
+++ b/java/MyMyBatis/src/AbstractDAOOperations.java
@@ -3,7 +3,7 @@ package ch.asynk;
 import java.util.List;
 
 public abstract class AbstractDAOOperations<TIdentity,
-       TObject extends AbstractModel<TIdentity>,
+       TObject extends AbstractModel<TIdentity, TObject>,
        TMapper extends AbstractMapper<TIdentity, TObject>> extends AbstractDAO<TObject, TMapper>
 {
 
diff --git a/java/MyMyBatis/src/AbstractMapper.java b/java/MyMyBatis/src/AbstractMapper.java
index 33bd567..c1ec675 100644
--- a/java/MyMyBatis/src/AbstractMapper.java
+++ b/java/MyMyBatis/src/AbstractMapper.java
@@ -4,6 +4,8 @@ import java.util.List;
 
 public interface AbstractMapper<TIdentity, TObject>
 {
+    int save(TObject obj);
+
     int insert(TObject obj);
 
     int update(TObject obj);
diff --git a/java/MyMyBatis/src/AbstractModel.java b/java/MyMyBatis/src/AbstractModel.java
index 81bab76..365472c 100644
--- a/java/MyMyBatis/src/AbstractModel.java
+++ b/java/MyMyBatis/src/AbstractModel.java
@@ -1,7 +1,15 @@
 package ch.asynk;
 
-public interface AbstractModel<TIdentity>
+public interface AbstractModel<TIdentity, TObject>
 {
     boolean isUnsaved();
+
+    TObject self();
+
+    AbstractMapper<TIdentity, TObject> getDAO();
+
+    default void save() { getDAO().save(self()); }
+
+    default int delete() { return getDAO().delete(self()); }
 }
 
diff --git a/java/MyMyBatis/src/Main.java b/java/MyMyBatis/src/Main.java
index ad371f7..deb274f 100644
--- a/java/MyMyBatis/src/Main.java
+++ b/java/MyMyBatis/src/Main.java
@@ -38,12 +38,12 @@ public class Main
         System.out.println("selectOne : " + m.toString());
         System.out.println("update ...");
         m.setName("adios");
-        dao.save(m);
+        m.save();
         m = dao.selectOne(2);
         failIf(m == null , "selectOne()");
         failIf(!m.getName().equals("adios") , "selectOne()");
         System.out.println("selectOne : " + m.toString());
-        count = dao.delete(m);
+        count = m.delete();
         failIf(count != 1, "delete()");
         System.out.println("delete : " + count);
         count = dao.count();
@@ -51,7 +51,7 @@ public class Main
         System.out.println("count  : " + count);
         System.out.println("insert ...");
         m = new Model("HoMySatan");
-        count = dao.save(m);
+        m.save();
         failIf(count != 1, "insert()");
         count = dao.count();
         failIf(count != 2, "count()");
diff --git a/java/MyMyBatis/src/Model.java b/java/MyMyBatis/src/Model.java
index 676cdde..daa7938 100644
--- a/java/MyMyBatis/src/Model.java
+++ b/java/MyMyBatis/src/Model.java
@@ -3,7 +3,7 @@ package ch.asynk;
 import lombok.Setter;
 import lombok.Getter;
 
-public class Model implements AbstractModel<Integer>
+public class Model implements AbstractModel<Integer, Model>
 {
     private @Setter @Getter Integer id;
     private @Setter @Getter String name;
@@ -26,6 +26,18 @@ public class Model implements AbstractModel<Integer>
     }
 
     @Override
+    public Model self()
+    {
+        return this;
+    }
+
+    @Override
+    public ModelMapper getDAO()
+    {
+        return ModelDAO.getInstance();
+    }
+
+    @Override
     public String toString()
     {
         return String.format("model [%d] %s", id, name);
-- 
cgit v1.1-2-g2b99