Test that externalization of EnumSets works as expected.

git-svn-id: https://svn.apache.org/repos/asf/openjpa/trunk@558186 13f79535-47bb-0310-9956-ffa450edef68

openjpa-persistence-jdbc/src/test/java/org/apache/openjpa/persistence/fields/EnumSetOwner.java

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+/*
+ * 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.openjpa.persistence.fields;
+
+import java.util.EnumSet;
+import java.util.Collections;
+import java.util.Set;
+import javax.persistence.Id;
+import javax.persistence.Version;
+import javax.persistence.Entity;
+
+import org.apache.openjpa.persistence.Persistent;
+import org.apache.openjpa.persistence.Externalizer;
+
+@Entity
+public class EnumSetOwner {
+
+    @Id
+    private int id;
+
+    @Version
+    private int version;
+
+    @Persistent
+    @Externalizer("externalizer")
+    private EnumSetHolder enumSetHolder;
+
+    public Set<SampleEnum> getEnumSet() {
+        return Collections.unmodifiableSet(enumSetHolder.enumSet);
+    }
+
+    public void setEnumSet(EnumSet<SampleEnum> enumSet) {
+        enumSetHolder = new EnumSetHolder(enumSet);
+    }
+
+    public static class EnumSetHolder {
+
+        private final EnumSet<SampleEnum> enumSet;
+
+        public EnumSetHolder(String externalizedValue) {
+            // this implementation can only handle the special form created
+            // by the externalizer above
+            if (!"all".equals(externalizedValue))
+                throw new IllegalStateException(externalizedValue);
+
+            enumSet = EnumSet.allOf(SampleEnum.class);
+        }
+
+        private EnumSetHolder(EnumSet<SampleEnum> enumSet) {
+            this.enumSet = enumSet;
+        }
+
+        public String externalizer() {
+            // this implementation always externalizes to a special
+            // representation of all the values.
+            return "all";
+        }
+    }
+}

openjpa-persistence-jdbc/src/test/java/org/apache/openjpa/persistence/fields/SampleEnum.java

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+/*
+ * 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.openjpa.persistence.fields;
+
+public enum SampleEnum {
+    FOO, BAR, BAZ, QUUX
+}

openjpa-persistence-jdbc/src/test/java/org/apache/openjpa/persistence/fields/TestEnumSets.java

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+/*
+ * 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.openjpa.persistence.fields;
+
+import java.util.EnumSet;
+
+import org.apache.openjpa.persistence.test.SingleEMTestCase;
+
+public class TestEnumSets
+    extends SingleEMTestCase {
+
+    public void setUp() {
+        setUp(EnumSetOwner.class, CLEAR_TABLES);
+    }
+
+    public void testExternalizedEnumSet() {
+        // test that inserting works
+        EnumSetOwner o = new EnumSetOwner();
+        o.setEnumSet(EnumSet.allOf(SampleEnum.class));
+
+        em.getTransaction().begin();
+        em.persist(o);
+        em.getTransaction().commit();
+        Object oid = em.getObjectId(o);
+        em.close();
+
+        // ... and that loading works, with a new EM
+        em = emf.createEntityManager();
+        o = em.find(EnumSetOwner.class, oid);
+        assertEquals(EnumSet.allOf(SampleEnum.class), o.getEnumSet());
+    }
+}