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/*******************************************************************************
* Copyright (c) 2008, 2013 Oracle. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0, which accompanies this distribution
* and is available at http://www.eclipse.org/legal/epl-v10.html.
*
* Contributors:
* Oracle - initial API and implementation
******************************************************************************/
package org.eclipse.jpt.jpa.eclipselink.core.context;
import org.eclipse.jpt.common.utility.internal.transformer.TransformerAdapter;
import org.eclipse.jpt.common.utility.transformer.Transformer;
import org.eclipse.jpt.jpa.core.context.Converter;
import org.eclipse.jpt.jpa.eclipselink.core.context.persistence.EclipseLinkPersistenceUnit;
/**
* EclipseLink convert (not to be confused with EclipseLink converter)
* <p>
* Provisional API: This interface is part of an interim API that is still
* under development and expected to change significantly before reaching
* stability. It is available at this early stage to solicit feedback from
* pioneering adopters on the understanding that any code that uses this API
* will almost certainly be broken (repeatedly) as the API evolves.
*
* @version 3.2
* @since 2.1
*/
public interface EclipseLinkConvert
extends Converter
{
EclipseLinkPersistenceUnit getPersistenceUnit();
String getConverterName();
String getSpecifiedConverterName();
void setSpecifiedConverterName(String converterName);
String SPECIFIED_CONVERTER_NAME_PROPERTY = "specifiedConverterName"; //$NON-NLS-1$
String getDefaultConverterName();
String DEFAULT_CONVERTER_NAME_PROPERTY = "defaultConverterName"; //$NON-NLS-1$
/**
* Reserved name for specifying a serialized object converter.
* In this case a corresponding @CustomConverter is unnecessary.
*/
String SERIALIZED_CONVERTER = "serialized"; //$NON-NLS-1$
/**
* Reserved name for specifying a class instance converter.
* Will use a ClassInstanceConverter
* on the associated mapping. When using a ClassInstanceConverter the database representation is a
* String representing the Class name and the object-model representation is an instance
* of that class built with the zero-argument constructor.
* In this case a corresponding @CustomConverter is unnecessary.
*/
String CLASS_INSTANCE_CONVERTER = "class-instance"; //$NON-NLS-1$
/**
* Reserved name for specifying no converter.
* This can be used to override a situation where either
* another converter is defaulted or another converter is set.
* In this case a corresponding @CustomConverter is unnecessary.
*/
String NO_CONVERTER = "none"; //$NON-NLS-1$
String[] RESERVED_CONVERTER_NAMES = {NO_CONVERTER, CLASS_INSTANCE_CONVERTER, SERIALIZED_CONVERTER};
String DEFAULT_CONVERTER_NAME = NO_CONVERTER;
/**
* A transformer that returns an {@link EclipseLinkConvert} if the passed
* in {@link Converter} can be cast as such;
* otherwise, it returns <code>null</code>.
*/
Transformer<Converter, EclipseLinkConvert> CONVERTER_TRANSFORMER = new ConverterTransformer();
class ConverterTransformer
extends TransformerAdapter<Converter, EclipseLinkConvert>
{
@Override
public EclipseLinkConvert transform(Converter converter) {
return (converter.getType() == EclipseLinkConvert.class) ? (EclipseLinkConvert) converter : null;
}
}
}
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