svn commit: r481835 - /incubator/tuscany/java/sca/services/persistence/common/src/main/java/org/apache/tuscany/service/persistence/common/PersistenceContextProcessor.java

[me...@apache.org]

Author: meerajk
Date: Sun Dec  3 09:39:42 2006
New Revision: 481835

URL: http://svn.apache.org/viewvc?view=rev&rev=481835
Log:
Initial cut for the persistence context annotation.

Added:
    incubator/tuscany/java/sca/services/persistence/common/src/main/java/org/apache/tuscany/service/persistence/common/PersistenceContextProcessor.java   (with props)

Added: incubator/tuscany/java/sca/services/persistence/common/src/main/java/org/apache/tuscany/service/persistence/common/PersistenceContextProcessor.java
URL: http://svn.apache.org/viewvc/incubator/tuscany/java/sca/services/persistence/common/src/main/java/org/apache/tuscany/service/persistence/common/PersistenceContextProcessor.java?view=auto&rev=481835
==============================================================================
--- incubator/tuscany/java/sca/services/persistence/common/src/main/java/org/apache/tuscany/service/persistence/common/PersistenceContextProcessor.java (added)
+++ incubator/tuscany/java/sca/services/persistence/common/src/main/java/org/apache/tuscany/service/persistence/common/PersistenceContextProcessor.java Sun Dec  3 09:39:42 2006
@@ -0,0 +1,93 @@
+/*
+ * 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 javax.persistence.EntityManager;
+import javax.persistence.EntityManagerFactory;
+import javax.persistence.PersistenceContext;
+
+import org.apache.tuscany.spi.ObjectFactory;
+import org.apache.tuscany.spi.annotation.Autowire;
+import org.apache.tuscany.spi.component.CompositeComponent;
+import org.apache.tuscany.spi.deployer.DeploymentContext;
+import org.apache.tuscany.spi.implementation.java.AbstractPropertyProcessor;
+import org.apache.tuscany.spi.implementation.java.ImplementationProcessorService;
+import org.apache.tuscany.spi.implementation.java.JavaMappedProperty;
+
+/**
+ * Annotation processor for injecting <code>PersistenceUnit</code> 
+ * annotations on properties.
+ *
+ */
+public class PersistenceContextProcessor extends AbstractPropertyProcessor<PersistenceContext> {
+
+    /** Persistence unit builder */
+    private PersistenceUnitBuilder builder = new DefaultPersistenceUnitBuilder();
+
+    /**
+     * Injects the implementation processor service.
+     * @param service Implementation processor service.
+     */
+    public PersistenceContextProcessor(@Autowire ImplementationProcessorService service) {
+        super(PersistenceContext.class, service);
+    }
+
+    /**
+     * Defaults to the field name.
+     */
+    @Override
+    protected String getName(PersistenceContext persistenceContext) {
+        return null;
+    }
+
+    /**
+     * Initializes the property.
+     */
+    @SuppressWarnings("unchecked")
+    protected <T> void initProperty(JavaMappedProperty<T> property, PersistenceContext annotation, CompositeComponent parent, DeploymentContext context) {
+
+        String unitName = annotation.unitName();
+        EntityManagerFactory emf = (EntityManagerFactory) parent.getSystemChild(unitName);
+
+        if (emf == null) {
+            emf = builder.newEntityManagerFactory(unitName, context.getClassLoader());
+            parent.registerJavaObject(unitName, EntityManagerFactory.class, emf);
+        }
+        ObjectFactory factory = new EmObjectFactory(emf);
+        property.setDefaultValueFactory(factory);
+
+    }
+
+    private class EmObjectFactory implements ObjectFactory<EntityManager> {
+        
+        private EntityManagerFactory emf;
+
+        public EmObjectFactory(EntityManagerFactory emf) {
+            this.emf = emf;
+        }
+
+        public EntityManager getInstance() {
+            EntityManager em = emf.createEntityManager();
+            em.joinTransaction();
+            return em;
+        }
+        
+    }
+
+}

Propchange: incubator/tuscany/java/sca/services/persistence/common/src/main/java/org/apache/tuscany/service/persistence/common/PersistenceContextProcessor.java
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Propchange: incubator/tuscany/java/sca/services/persistence/common/src/main/java/org/apache/tuscany/service/persistence/common/PersistenceContextProcessor.java
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