1 files changed, 66 insertions, 0 deletions
diff --git a/sandbox/old/contrib/persistence/common/src/main/java/org/apache/tuscany/service/persistence/common/DefaultPersistenceUnitBuilder.java b/sandbox/old/contrib/persistence/common/src/main/java/org/apache/tuscany/service/persistence/common/DefaultPersistenceUnitBuilder.java
new file mode 100644
index 0000000000..684eee8c09
--- /dev/null
+++ b/sandbox/old/contrib/persistence/common/src/main/java/org/apache/tuscany/service/persistence/common/DefaultPersistenceUnitBuilder.java
@@ -0,0 +1,66 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.service.persistence.common;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import javax.persistence.EntityManagerFactory;
+import javax.persistence.spi.PersistenceProvider;
+import javax.persistence.spi.PersistenceUnitInfo;
+
+/**
+ * Default implementation of the persistence unit builder.
+ *
+ * @version $Rev$ $Date$
+ */
+public class DefaultPersistenceUnitBuilder implements PersistenceUnitBuilder {
+
+    /** Persistence unit scanner */
+    private PersistenceUnitScanner scanner = new PersistenceUnitScanner();
+    
+    /**
+     * Builds the entity manager factory matching the unit name. All persistence.xml 
+     * files available for the specified classloader is scanned for the specified 
+     * persistence unit. The JPA provider API is used to create the entity manager 
+     * factory.
+     * 
+     * @param unitName Persistence unit name.
+     * @param classLoader Classloader.
+     * @return Entity manager factory.
+     */
+    public EntityManagerFactory newEntityManagerFactory(String unitName, ClassLoader classLoader) {
+        
+        PersistenceUnitInfo info = scanner.getPersistenceUnitInfo(unitName, classLoader);
+        String providerClass = info.getPersistenceProviderClassName();
+        try {
+            Map overrides = new HashMap();
+            PersistenceProvider provider = (PersistenceProvider) Class.forName(providerClass).newInstance();
+            return provider.createContainerEntityManagerFactory(info, overrides);
+        } catch (InstantiationException ex) {
+            throw new TuscanyJpaException(ex);
+        } catch (IllegalAccessException ex) {
+            throw new TuscanyJpaException(ex);
+        } catch (ClassNotFoundException ex) {
+            throw new TuscanyJpaException(ex);
+        }
+        
+    }
+
+}