From 26b01b500065634eb3133dc354a0ba71b13bff56 Mon Sep 17 00:00:00 2001
From: Trygve Laugstøl <trygvis@inamo.no>
Date: Wed, 7 Aug 2013 23:53:53 +0200
Subject: wip o Start of JPA implementation.

---
 .../persistence/sql/SqlEntityManagerFactory.java   | 105 +++++++++++++++++++++
 1 file changed, 105 insertions(+)
 create mode 100644 sql-persistence/src/main/java/io/trygvis/persistence/sql/SqlEntityManagerFactory.java

(limited to 'sql-persistence/src/main/java/io/trygvis/persistence/sql/SqlEntityManagerFactory.java')

diff --git a/sql-persistence/src/main/java/io/trygvis/persistence/sql/SqlEntityManagerFactory.java b/sql-persistence/src/main/java/io/trygvis/persistence/sql/SqlEntityManagerFactory.java
new file mode 100644
index 0000000..d48f7e5
--- /dev/null
+++ b/sql-persistence/src/main/java/io/trygvis/persistence/sql/SqlEntityManagerFactory.java
@@ -0,0 +1,105 @@
+package io.trygvis.persistence.sql;
+
+import javax.persistence.Cache;
+import javax.persistence.EntityManager;
+import javax.persistence.EntityManagerFactory;
+import javax.persistence.PersistenceException;
+import javax.persistence.PersistenceUnitUtil;
+import javax.persistence.criteria.CriteriaBuilder;
+import javax.persistence.metamodel.Metamodel;
+import javax.sql.DataSource;
+import java.sql.Connection;
+import java.sql.SQLException;
+import java.util.Map;
+
+import static java.util.Collections.emptyMap;
+
+public abstract class SqlEntityManagerFactory implements EntityManagerFactory {
+
+    public final SqlUnit sqlUnit;
+
+    private final DataSource dataSource;
+
+    protected SqlEntityManagerFactory(SqlUnit sqlUnit, DataSource dataSource) {
+        this.sqlUnit = sqlUnit;
+        this.dataSource = dataSource;
+    }
+
+    // -----------------------------------------------------------------------
+    //
+    // -----------------------------------------------------------------------
+
+    protected abstract EntityManager createEntityManager(Connection c);
+
+    // -----------------------------------------------------------------------
+    //
+    // -----------------------------------------------------------------------
+
+    @Override
+    public EntityManager createEntityManager() {
+        return createEntityManager(emptyMap());
+    }
+
+    @Override
+    public EntityManager createEntityManager(Map map) {
+        try {
+            Connection c = dataSource.getConnection();
+            return createEntityManager(c);
+        } catch (SQLException e) {
+            throw new PersistenceException("Could not get connection", e);
+        }
+    }
+
+    @Override
+    public CriteriaBuilder getCriteriaBuilder() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public Metamodel getMetamodel() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public boolean isOpen() {
+        return true;
+    }
+
+    @Override
+    public void close() {
+    }
+
+    @Override
+    public Map<String, Object> getProperties() {
+        return emptyMap();
+    }
+
+    @Override
+    public Cache getCache() {
+        return new NoOpCache();
+    }
+
+    @Override
+    public PersistenceUnitUtil getPersistenceUnitUtil() {
+        throw new UnsupportedOperationException();
+    }
+
+    private static class NoOpCache implements Cache {
+        @Override
+        public boolean contains(Class cls, Object primaryKey) {
+            return false;
+        }
+
+        @Override
+        public void evict(Class cls, Object primaryKey) {
+        }
+
+        @Override
+        public void evict(Class cls) {
+        }
+
+        @Override
+        public void evictAll() {
+        }
+    }
+}
-- 
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