org.eclipse.persistence.mappings.converters.ConverterClass Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of org.eclipse.persistence.core Show documentation
Show all versions of org.eclipse.persistence.core Show documentation
EclipseLink build based upon Git transaction ecdf3c32c4
/*
* Copyright (c) 2012, 2018 Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2019 Payara Services Ltd.
*
* 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:
// 10/09/2012-2.5 Guy Pelletier
// - 374688: JPA 2.1 Converter support
// 10/25/2012-2.5 Guy Pelletier
// - 374688: JPA 2.1 Converter support
// 10/30/2012-2.5 Guy Pelletier
// - 374688: JPA 2.1 Converter support
// 11/28/2012-2.5 Guy Pelletier
// - 374688: JPA 2.1 Converter support
// 06/03/2013-2.5.1 Guy Pelletier
// - 402380: 3 jpa21/advanced tests failed on server with
// "java.lang.NoClassDefFoundError: org/eclipse/persistence/testing/models/jpa21/advanced/enums/Gender"
// 07/16/2013-2.5.1 Guy Pelletier
// - 412384: Applying Converter for parameterized basic-type for joda-time's DateTime does not work
package org.eclipse.persistence.mappings.converters;
import java.security.AccessController;
import java.security.PrivilegedActionException;
import org.eclipse.persistence.exceptions.ValidationException;
import org.eclipse.persistence.internal.descriptors.ClassNameConversionRequired;
import org.eclipse.persistence.internal.localization.ExceptionLocalization;
import org.eclipse.persistence.internal.security.PrivilegedAccessHelper;
import org.eclipse.persistence.internal.security.PrivilegedClassForName;
import org.eclipse.persistence.internal.security.PrivilegedNewInstanceFromClass;
import org.eclipse.persistence.internal.sessions.AbstractSession;
import org.eclipse.persistence.logging.SessionLog;
import org.eclipse.persistence.mappings.DatabaseMapping;
import org.eclipse.persistence.mappings.DirectCollectionMapping;
import org.eclipse.persistence.mappings.DirectMapMapping;
import org.eclipse.persistence.mappings.DirectToFieldMapping;
import org.eclipse.persistence.sessions.Session;
import javax.persistence.AttributeConverter;
import javax.persistence.PersistenceException;
/**
* A JPA attribute converter class wrapped with an EclipseLink converter. This
* class is placed directly on mappings.
*
* @author Guy Pelletier
* @since Eclipselink 2.5
*/
public class ConverterClass,X,Y> implements Converter, ClassNameConversionRequired {
protected boolean isForMapKey;
protected boolean disableConversion;
protected Class fieldClassification;
protected String fieldClassificationName;
protected String attributeConverterClassName;
protected AttributeConverter attributeConverter;
protected AbstractSession session;
private Class attributeConverterClass;
/**
* INTERNAL:
* This method will be called when creating a converter for an embedded
* mapping attribute. The isForMapKey information will need to be known
* for proper initialization.
*/
public ConverterClass(String attributeConverterClassName, boolean isForMapKey, String fieldClassificationName, boolean disableConversion) {
this.isForMapKey = isForMapKey;
this.disableConversion = disableConversion;
this.fieldClassificationName = fieldClassificationName;
this.attributeConverterClassName = attributeConverterClassName;
}
/**
* INTERNAL:
* Convert all the class-name-based settings in this converter to actual
* class-based settings. This method is used when converting a project
* that has been built with class names to a project with classes.
*/
public void convertClassNamesToClasses(ClassLoader classLoader) {
attributeConverterClass = getAttributeConverterClass(classLoader);
constructFieldClassification(classLoader);
}
private void constructAttributeConverter() {
T attributeConverterInstance = getAttributeConverterInstance(attributeConverterClass);
try {
if (PrivilegedAccessHelper.shouldUsePrivilegedAccess()){
try {
if (attributeConverterInstance == null){
attributeConverterInstance = AccessController.doPrivileged(new PrivilegedNewInstanceFromClass<>(attributeConverterClass));
}
} catch (PrivilegedActionException exception) {
throw ValidationException.errorInstantiatingClass(attributeConverterClass, exception.getException());
}
} else {
if (attributeConverterInstance == null){
attributeConverterInstance = PrivilegedAccessHelper.newInstanceFromClass(attributeConverterClass);
}
}
} catch (IllegalAccessException | InstantiationException exception) {
throw ValidationException.errorInstantiatingClass(attributeConverterClass, exception);
}
attributeConverter = attributeConverterInstance;
}
private T getAttributeConverterInstance(Class attributeConverterClass) {
try{
return session.getInjectionManager().createManagedBeanAndInjectDependencies(attributeConverterClass);
} catch (Exception e){
session.logThrowable(SessionLog.FINEST, SessionLog.JPA, e);
return null;
}
}
@SuppressWarnings("unchecked")
private Class getAttributeConverterClass(ClassLoader classLoader) {
try {
if (PrivilegedAccessHelper.shouldUsePrivilegedAccess()) {
try {
return AccessController.doPrivileged(new PrivilegedClassForName(attributeConverterClassName, true, classLoader));
} catch (PrivilegedActionException exception) {
throw ValidationException.classNotFoundWhileConvertingClassNames(attributeConverterClassName, exception.getException());
}
} else {
return PrivilegedAccessHelper.getClassForName(attributeConverterClassName, true, classLoader);
}
} catch (ClassNotFoundException exception) {
throw ValidationException.classNotFoundWhileConvertingClassNames(attributeConverterClassName, exception);
}
}
private void constructFieldClassification(ClassLoader classLoader) {
try {
if (PrivilegedAccessHelper.shouldUsePrivilegedAccess()){
try {
fieldClassification = AccessController.doPrivileged(new PrivilegedClassForName(fieldClassificationName, true, classLoader));
} catch (PrivilegedActionException exception) {
throw ValidationException.classNotFoundWhileConvertingClassNames(fieldClassificationName, exception.getException());
}
} else {
fieldClassification = PrivilegedAccessHelper.getClassForName(fieldClassificationName, true, classLoader);
}
} catch (ClassNotFoundException exception) {
throw ValidationException.classNotFoundWhileConvertingClassNames(fieldClassificationName, exception);
}
}
/**
* INTERNAL:
*/
@Override
@SuppressWarnings("unchecked")
public Object convertDataValueToObjectValue(Object dataValue, Session session) {
try {
return getAttributeConverter().convertToEntityAttribute((Y)dataValue);
} catch (RuntimeException re) {
throw new PersistenceException(ExceptionLocalization.buildMessage("wrap_convert_exception",
new Object[]{"convertToEntityAttribute", attributeConverterClassName, dataValue}), re);
}
}
/**
* INTERNAL:
*/
@Override
@SuppressWarnings("unchecked")
public Object convertObjectValueToDataValue(Object objectValue, Session session) {
try {
return getAttributeConverter().convertToDatabaseColumn((X) objectValue);
} catch (RuntimeException re) {
throw new PersistenceException(ExceptionLocalization.buildMessage("wrap_convert_exception",
new Object[]{"convertToDatabaseColumn", attributeConverterClassName, objectValue}), re);
}
}
/**
* INTERNAL:
*/
@Override
public void initialize(DatabaseMapping mapping, Session session) {
// Ensure the mapping has the correct field classification set.
if (mapping.isDirectToFieldMapping()) {
DirectToFieldMapping m = (DirectToFieldMapping) mapping;
if (disableConversion) {
m.setConverter(null);
} else {
m.setConverter(this);
m.setFieldClassification(fieldClassification);
m.setFieldClassificationClassName(fieldClassificationName);
}
} else if (mapping.isDirectMapMapping() && isForMapKey) {
DirectMapMapping m = (DirectMapMapping) mapping;
if (disableConversion) {
m.setKeyConverter(null);
} else {
m.setKeyConverter(this);
m.setDirectKeyFieldClassification(fieldClassification);
m.setDirectKeyFieldClassificationName(fieldClassificationName);
}
} else if (mapping.isDirectCollectionMapping()) {
DirectCollectionMapping m = (DirectCollectionMapping) mapping;
if (disableConversion) {
m.setValueConverter(null);
} else {
m.setValueConverter(this);
m.setDirectFieldClassification(fieldClassification);
m.setDirectFieldClassificationName(fieldClassificationName);
}
} else {
// TODO: what else could it be???
}
}
/**
* INTERNAL:
*/
@Override
public boolean isMutable() {
return false;
}
public void setSession(AbstractSession session) {
this.session = session;
}
protected AttributeConverter getAttributeConverter() {
if (attributeConverter == null) {
constructAttributeConverter();
}
return attributeConverter;
}
}