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AbstractSingleColumnUserType.java
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AbstractSingleColumnUserType.java
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/*
* Copyright 2010, 2011 Christopher Pheby
*
* 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.jadira.usertype.spi.shared;
import static org.jadira.usertype.spi.utils.reflection.ArrayUtils.copyOf;
import java.io.Serializable;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import org.hibernate.HibernateException;
import org.hibernate.engine.spi.SharedSessionContractImplementor;
import org.hibernate.usertype.EnhancedUserType;
import org.jadira.usertype.spi.utils.reflection.TypeHelper;
public abstract class AbstractSingleColumnUserType<T, J, C extends ColumnMapper<T, J>> extends AbstractUserType implements EnhancedUserType, Serializable {
private static final long serialVersionUID = -8258683760413283329L;
private final C columnMapper;
private final int[] sqlTypes;
@SuppressWarnings("unchecked")
public AbstractSingleColumnUserType() {
try {
columnMapper = (C) TypeHelper.getTypeArguments(AbstractSingleColumnUserType.class, getClass()).get(2).newInstance();
} catch (InstantiationException ex) {
throw new HibernateException("Could not initialise column mapper for " + getClass(), ex);
} catch (IllegalAccessException ex) {
throw new HibernateException("Could not access column mapper for " + getClass(), ex);
}
sqlTypes = new int[] { getColumnMapper().getSqlType() };
}
public final C getColumnMapper() {
return columnMapper;
}
@Override
public Class<T> returnedClass() {
return getColumnMapper().returnedClass();
}
@Override
public final int[] sqlTypes() {
return copyOf(sqlTypes);
}
@Override
public T nullSafeGet(ResultSet resultSet, String[] strings, SharedSessionContractImplementor session, Object object) throws SQLException {
beforeNullSafeOperation(session);
final SharedSessionContractImplementor mySession = doWrapSession(session);
try {
J converted = doNullSafeGet(resultSet, strings, mySession, object);
if (converted == null) {
return null;
}
return getColumnMapper().fromNonNullValue(converted);
} finally {
afterNullSafeOperation(session);
}
}
protected J doNullSafeGet(ResultSet resultSet, String[] strings, SharedSessionContractImplementor session, Object object) throws SQLException {
@SuppressWarnings("unchecked")
final J converted = (J) getColumnMapper().getHibernateType().nullSafeGet(resultSet, strings[0], session, object);
return converted;
}
@Override
public void nullSafeSet(PreparedStatement preparedStatement, Object value, int index, SharedSessionContractImplementor session) throws SQLException {
beforeNullSafeOperation(session);
final SharedSessionContractImplementor mySession = doWrapSession(session);
try {
final J transformedValue;
if (value == null) {
transformedValue = null;
} else {
@SuppressWarnings("unchecked") T myValue = (T) value;
transformedValue = getColumnMapper().toNonNullValue(myValue);
}
doNullSafeSet(preparedStatement, transformedValue, index, mySession);
} finally {
afterNullSafeOperation(session);
}
}
protected void doNullSafeSet(PreparedStatement preparedStatement, J transformedValue, int index, SharedSessionContractImplementor session) throws SQLException {
getColumnMapper().getHibernateType().nullSafeSet(preparedStatement, transformedValue, index, session);
}
@Override
public String objectToSQLString(Object object) {
@SuppressWarnings("unchecked") final T myObject = (T) object;
J convertedObject = myObject == null ? null : getColumnMapper().toNonNullValue(myObject);
return getColumnMapper().getHibernateType().toString(convertedObject);
}
@Override
public String toXMLString(Object object) {
@SuppressWarnings("unchecked") final T myObject = (T) object;
return getColumnMapper().toNonNullString(myObject);
}
@Override
public T fromXMLString(String string) {
return getColumnMapper().fromNonNullString(string);
}
protected SharedSessionContractImplementor doWrapSession(SharedSessionContractImplementor session) {
return session;
}
}