made PersistenceAnnotationBeanPostProcessor's JNDI API references optional - for compatibility with Google App Engine (SPR-6679)

org.springframework.context/src/main/java/org/springframework/jndi/JndiLocatorDelegate.java

@@ -0,0 +1,40 @@
+/*
+ * Copyright 2002-2010 the original author or authors.
+ *
+ * Licensed 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.springframework.jndi;
+
+import javax.naming.NamingException;
+
+/**
+ * {@link JndiLocatorSupport} subclass with public lookup methods,
+ * for convenient use as a delegate.
+ *
+ * @author Juergen Hoeller
+ * @since 3.0.1
+ */
+public class JndiLocatorDelegate extends JndiLocatorSupport {
+
+	@Override
+	public Object lookup(String jndiName) throws NamingException {
+		return super.lookup(jndiName);
+	}
+
+	@Override
+	public <T> T lookup(String jndiName, Class<T> requiredType) throws NamingException {
+		return super.lookup(jndiName, requiredType);
+	}
+
+}