| /* |
| * Copyright (c) 2022 Oracle and/or its affiliates. All rights reserved. |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v. 2.0 which is available at |
| * http://www.eclipse.org/legal/epl-2.0, |
| * or the Eclipse Distribution License v. 1.0 which is available at |
| * http://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause |
| */ |
| |
| // Contributors: |
| // Oracle - initial API and implementation |
| package org.eclipse.persistence.mappings.converters; |
| |
| import org.eclipse.persistence.mappings.DatabaseMapping; |
| import org.eclipse.persistence.mappings.foundation.AbstractDirectMapping; |
| import org.eclipse.persistence.sessions.Session; |
| |
| import java.util.UUID; |
| |
| /** |
| * Default UUID field value to JDBC data type converter. |
| */ |
| public class UUIDConverter implements Converter { |
| |
| /** |
| * Creates an instance of default UUID field value to JDBC data type converter. |
| */ |
| public UUIDConverter() { |
| } |
| |
| /** |
| * Converts UUID field value to String. |
| * |
| * @param uuidValue source UUID field value |
| * @param session current database session |
| * @return target String to be stored as JDBC VARCHAR |
| */ |
| @Override |
| public Object convertObjectValueToDataValue(Object uuidValue, Session session) { |
| if (uuidValue instanceof UUID) { |
| return uuidValue.toString(); |
| } |
| throw new IllegalArgumentException("Source object is not an instance of java.util.UUID"); |
| } |
| |
| /** |
| * Converts String from JDBC VARCHAR parameter to UUID field value. |
| * |
| * @param jdbcValue source String from JDBC VARCHAR |
| * @param session current database session |
| * @return target UUID field value |
| */ |
| @Override |
| public Object convertDataValueToObjectValue(Object jdbcValue, Session session) { |
| return UUID.fromString(jdbcValue.toString()); |
| } |
| |
| /** |
| * UUID values and String are immutable. |
| * |
| * @return value of {@code false} |
| */ |
| @Override |
| public boolean isMutable() { |
| return false; |
| } |
| |
| /** |
| * Initialize mapping for JDBC data type. |
| * |
| * @param mapping field database mapping |
| * @param session current database session |
| */ |
| @Override |
| public void initialize(DatabaseMapping mapping, Session session) { |
| if (mapping.isDirectToFieldMapping()) { |
| if (((AbstractDirectMapping)mapping).getFieldClassification() == null) { |
| final AbstractDirectMapping directMapping = AbstractDirectMapping.class.cast(mapping); |
| final Class<?> attributeClassification = mapping.getAttributeClassification(); |
| if (attributeClassification.isInstance(UUID.class)) { |
| directMapping.setFieldClassification(UUID.class); |
| } |
| } |
| } |
| } |
| } |