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/*
* Copyright 2002-2012 the original author or authors.
*
* 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.springframework.orm.hibernate3.support;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
import java.util.Arrays;
import javax.transaction.TransactionManager;
import org.springframework.jdbc.support.lob.LobCreator;
import org.springframework.jdbc.support.lob.LobHandler;
/**
* Hibernate UserType implementation for byte arrays that get mapped to BLOBs.
* Retrieves the LobHandler to use from LocalSessionFactoryBean at config time.
*
* <p>Can also be defined in generic Hibernate mappings, as DefaultLobCreator will
* work with most JDBC-compliant database drivers. In this case, the field type
* does not have to be BLOB: For databases like MySQL and MS SQL Server, any
* large enough binary type will work.
*
* @author Juergen Hoeller
* @since 1.2
* @see org.springframework.orm.hibernate3.LocalSessionFactoryBean#setLobHandler
*/
public class BlobByteArrayType extends AbstractLobType {
/**
* Constructor used by Hibernate: fetches config-time LobHandler and
* config-time JTA TransactionManager from LocalSessionFactoryBean.
* @see org.springframework.orm.hibernate3.LocalSessionFactoryBean#getConfigTimeLobHandler
* @see org.springframework.orm.hibernate3.LocalSessionFactoryBean#getConfigTimeTransactionManager
*/
public BlobByteArrayType() {
super();
}
/**
* Constructor used for testing: takes an explicit LobHandler
* and an explicit JTA TransactionManager (can be {@code null}).
*/
protected BlobByteArrayType(LobHandler lobHandler, TransactionManager jtaTransactionManager) {
super(lobHandler, jtaTransactionManager);
}
@Override
public int[] sqlTypes() {
return new int[] {Types.BLOB};
}
@Override
public Class<?> returnedClass() {
return byte[].class;
}
@Override
public boolean isMutable() {
return true;
}
@Override
public boolean equals(Object x, Object y) {
return (x == y) ||
(x instanceof byte[] && y instanceof byte[] && Arrays.equals((byte[]) x, (byte[]) y));
}
@Override
public Object deepCopy(Object value) {
if (value == null) {
return null;
}
byte[] original = (byte[]) value;
byte[] copy = new byte[original.length];
System.arraycopy(original, 0, copy, 0, original.length);
return copy;
}
@Override
protected Object nullSafeGetInternal(
ResultSet rs, String[] names, Object owner, LobHandler lobHandler)
throws SQLException {
return lobHandler.getBlobAsBytes(rs, names[0]);
}
@Override
protected void nullSafeSetInternal(
PreparedStatement ps, int index, Object value, LobCreator lobCreator)
throws SQLException {
lobCreator.setBlobAsBytes(ps, index, (byte[]) value);
}
}
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