Add exception translator for EclipseLink exceptions

Issue: SPR-9541

spring-orm/src/main/java/org/springframework/orm/eclipselink/EclipseLinkExceptionTranslator.java

@@ -0,0 +1,51 @@
+/*
+ * Copyright 2002-2012 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.orm.eclipselink;
+
+import org.eclipse.persistence.exceptions.EclipseLinkException;
+import org.springframework.dao.DataAccessException;
+import org.springframework.dao.support.PersistenceExceptionTranslator;
+
+/**
+ * {@link PersistenceExceptionTranslator} capable of translating {@link EclipseLinkException}
+ * instances to Spring's {@link DataAccessException} hierarchy.
+ *
+ * @author Jan Stamer
+ * @since 3.2
+ * @see org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor
+ */
+public class EclipseLinkExceptionTranslator implements PersistenceExceptionTranslator {
+
+	public DataAccessException translateExceptionIfPossible(RuntimeException ex) {
+		if (ex instanceof EclipseLinkException) {
+			return convertEclipseLinkAccessException((EclipseLinkException) ex);
+		}
+		return null;
+	}
+
+	/**
+	 * Convert the given EclipseLinkException to an appropriate exception from
+	 * the {@code org.springframework.dao} hierarchy.
+	 * @param ex EclipseLinkException that occurred
+	 * @return a corresponding DataAccessException
+	 * @see SessionFactoryUtils#convertEclipseLinkAccessException
+	 */
+	protected DataAccessException convertEclipseLinkAccessException(EclipseLinkException ex) {
+		return EclipseLinkUtils.convertEclipseLinkAccessException(ex);
+	}
+
+}

spring-orm/src/main/java/org/springframework/orm/eclipselink/EclipseLinkSystemException.java

@@ -0,0 +1,42 @@
+/*
+ * Copyright 2002-2012 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.orm.eclipselink;
+
+import org.eclipse.persistence.exceptions.EclipseLinkException;
+import org.springframework.dao.UncategorizedDataAccessException;
+
+/**
+ * EclipseLink-specific subclass of UncategorizedDataAccessException, for
+ * EclipseLink system errors that do not match any concrete
+ * <code>org.springframework.dao</code> exceptions.
+ * 
+ * @author Jan Stamer
+ * @since 3.2
+ * @see EclipseLinkUtils#convertEclipseLinkAccessException(EclipseLinkException)
+ */
+public class EclipseLinkSystemException extends UncategorizedDataAccessException {
+
+	/**
+	 * Create a new HibernateSystemException, wrapping an arbitrary
+	 * HibernateException.
+	 * @param cause the HibernateException thrown
+	 */
+	public EclipseLinkSystemException(EclipseLinkException cause) {
+		super(cause != null ? cause.getMessage() : null, cause);
+	}
+
+}

spring-orm/src/main/java/org/springframework/orm/eclipselink/EclipseLinkUtils.java

@@ -0,0 +1,42 @@
+/*
+ * Copyright 2002-2012 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.orm.eclipselink;
+
+import org.eclipse.persistence.exceptions.EclipseLinkException;
+import org.springframework.dao.DataAccessException;
+
+/**
+ * Helper class featuring methods for Eclipse Link. Also provides support for
+ * exception translation.
+ * 
+ * @author Jan Stamer
+ * @since 3.2
+ */
+public abstract class EclipseLinkUtils {
+
+	/**
+	 * Convert the given EclipseLinkException to an appropriate exception from
+	 * the <code>org.springframework.dao</code> hierarchy.
+	 * @param ex EclipseLinkException that occured
+	 * @return the corresponding DataAccessException instance
+	 * @see EclipseLinkExceptionTranslator#convertEclipseLinkAccessException(EclipseLinkException)
+	 */
+	public static DataAccessException convertEclipseLinkAccessException(EclipseLinkException ex) {
+		return new EclipseLinkSystemException(ex);
+	}
+
+}

spring-orm/src/test/java/org/springframework/orm/eclipselink/EclipseLinkExceptionTranslatorTests.java

@@ -0,0 +1,41 @@
+/*
+ * Copyright 2002-2012 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.orm.eclipselink;
+
+import junit.framework.TestCase;
+
+import org.eclipse.persistence.exceptions.DatabaseException;
+import org.springframework.dao.DataAccessException;
+
+/**
+ * @author Jan Stamer
+ * @since 3.2
+ */
+public class EclipseLinkExceptionTranslatorTests extends TestCase {
+
+	public void testWithWrongException() {
+		EclipseLinkExceptionTranslator exceptionTranslator = new EclipseLinkExceptionTranslator();
+		assertNull(exceptionTranslator.translateExceptionIfPossible(new IllegalArgumentException()));
+	}
+
+	public void testWithEclipseLinkException() {
+		EclipseLinkExceptionTranslator exceptionTranslator = new EclipseLinkExceptionTranslator();
+		assertNotNull(exceptionTranslator.translateExceptionIfPossible(DatabaseException.databaseAccessorNotConnected()));
+		assertTrue(exceptionTranslator.translateExceptionIfPossible(DatabaseException.databaseAccessorNotConnected()) instanceof DataAccessException);
+	}
+
+}

spring-orm/src/test/java/org/springframework/orm/eclipselink/EclipseLinkSytemExceptionTests.java

@@ -0,0 +1,52 @@
+/*
+ * Copyright 2002-2012 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.orm.eclipselink;
+
+import junit.framework.TestCase;
+
+import org.eclipse.persistence.exceptions.DatabaseException;
+import org.hibernate.HibernateException;
+
+/**
+ * @author Jan Stamer
+ * @since 3.2
+ */
+public class EclipseLinkSytemExceptionTests extends TestCase {
+
+	public void testWithNull() {
+		EclipseLinkSystemException exception = new EclipseLinkSystemException(null);
+		assertNull(exception.getCause());
+		assertNull(exception.getMessage());
+	}
+
+	public void testCreateWithCause() {
+		DatabaseException dbExceptionWithCause = new DatabaseException("my custom exception cause") {
+		};
+		EclipseLinkSystemException elSystemException = new EclipseLinkSystemException(dbExceptionWithCause);
+		assertEquals(dbExceptionWithCause, elSystemException.getCause());
+		assertTrue(elSystemException.getMessage().contains("my custom exception cause"));
+	}
+
+	public void testCreateWithNullCause() throws HibernateException {
+		DatabaseException dbExceptionWithCause = new DatabaseException((String) null) {
+		};
+		EclipseLinkSystemException elSystemException = new EclipseLinkSystemException(dbExceptionWithCause);
+		assertEquals(dbExceptionWithCause, elSystemException.getCause());
+		assertTrue(elSystemException.getMessage().contains("null"));
+	}
+
+}

spring-orm/src/test/java/org/springframework/orm/eclipselink/EclipseLinkUtilsTests.java

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2002-2012 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.orm.eclipselink;
+
+import junit.framework.TestCase;
+
+import org.eclipse.persistence.exceptions.DatabaseException;
+import org.springframework.dao.DataAccessException;
+
+/**
+ * @author Jan Stamer
+ * @since 3.2
+ */
+public class EclipseLinkUtilsTests extends TestCase {
+
+	public void testWithNull() {
+		assertTrue(EclipseLinkUtils.convertEclipseLinkAccessException(null) instanceof DataAccessException);
+	}
+
+	public void testWithEclipseLinkException() {
+		assertTrue(EclipseLinkUtils.convertEclipseLinkAccessException(DatabaseException.databaseAccessorNotConnected()) instanceof DataAccessException);
+	}
+
+}