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/*
 * Copyright (c) 1998, 2021 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 from Oracle TopLink
package org.eclipse.persistence.internal.helper;

/**
 * 

* Purpose: Extension to the existing conversion manager to support the * EJB 3.0 spec. *

* Responsibilities: *

    *
  • Allow a null value default to be read into primitives. With the current * conversion manager, setting a null into a primitive causes and exception. * This conversion manager was added to avoid that exception and therefore, add * support for schemas that were built before the object model was mapped * (using a primitive). Therefore, EclipseLink will not change the null column value * in the database through this conversion. The value on the database will only * be changed if the user actually sets a new primitive value. *
  • Allows users to define their own set of default null values to be used * in the conversion. *
* * @author Guy Pelletier * @since TopLink 10.1.4 RI */ public class JPAConversionManager extends ConversionManager { public JPAConversionManager() { super(); } /** * INTERNAL: */ @Override public T getDefaultNullValue(Class theClass) { Object defaultNullValue = null; if (this.defaultNullValues != null){ defaultNullValue = getDefaultNullValues().get(theClass); } if (defaultNullValue == null && theClass.isPrimitive()) { if(Double.TYPE.equals(theClass)){ return (T) Double.valueOf(0D); } else if(Long.TYPE.equals(theClass)) { return (T) Long.valueOf(0L); } else if(Character.TYPE.equals(theClass)){ return (T) Character.valueOf('\u0000'); } else if(Float.TYPE.equals(theClass)){ return (T) Float.valueOf(0F); } else if(Short.TYPE.equals(theClass)){ return (T) Short.valueOf((short) 0); } else if(Byte.TYPE.equals(theClass)){ return (T) Byte.valueOf((byte) 0); } else if(Boolean.TYPE.equals(theClass)){ return (T) Boolean.FALSE; } else { return (T) Integer.valueOf(0); } } else { return (T) defaultNullValue; } } }




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