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/*
* Copyright (c) 2010-2012 Eike Stepper (Berlin, Germany) and others.
* 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:
* Martin Taal - initial api
* Eike Stepper - maintenance
*/
package org.eclipse.emf.cdo.server.internal.hibernate.tuplizer;
import org.eclipse.emf.cdo.common.lob.CDOBlob;
import org.eclipse.emf.cdo.common.lob.CDOClob;
import org.eclipse.emf.cdo.common.lob.CDOLob;
import org.eclipse.net4j.util.HexUtil;
import org.hibernate.engine.spi.SessionImplementor;
import org.hibernate.type.StandardBasicTypes;
import org.hibernate.usertype.ParameterizedType;
import org.hibernate.usertype.UserType;
import java.io.Serializable;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
import java.util.Properties;
/**
* Base class for persisting {@link CDOBlob} and {@link CDOClob}.
*/
public abstract class CDOLobUserType implements UserType, ParameterizedType
{
private static final String SEPARATOR = " - ";
private static final int[] SQL_TYPES = { Types.CLOB };
public CDOLobUserType()
{
}
public void setParameterValues(Properties arg0)
{
}
public int[] sqlTypes()
{
return SQL_TYPES;
}
public boolean isMutable()
{
return false;
}
public Object deepCopy(Object value)
{
return value;
}
public boolean equals(Object x, Object y)
{
if (x == y)
{
return true;
}
if (x == null || y == null)
{
return false;
}
return x.equals(y);
}
public Object nullSafeGet(ResultSet rs, String[] names, SessionImplementor sessionImplementor, Object owner)
throws SQLException
{
try
{
final String value = StandardBasicTypes.STRING.nullSafeGet(rs, names[0], sessionImplementor);
if (rs.wasNull())
{
return null;
}
return convertStringToLob(value);
}
catch (Exception e)
{
throw new IllegalStateException(e);
}
}
public void nullSafeSet(PreparedStatement statement, Object value, int index, SessionImplementor sessionImplementor)
throws SQLException
{
try
{
final CDOLob<?> cdoLob = (CDOLob<?>)value;
if (value == null || cdoLob.getSize() == 0)
{
statement.setNull(index, Types.VARCHAR);
return;
}
statement.setString(index, convertLobToString(cdoLob));
}
catch (Exception e)
{
throw new IllegalStateException(e);
}
}
public Serializable disassemble(Object value)
{
return (Serializable)value;
}
public Object assemble(Serializable cachedValue, Object owner)
{
return cachedValue;
}
private String convertLobToString(CDOLob<?> lob)
{
return HexUtil.bytesToHex(lob.getID()) + SEPARATOR + lob.getSize();
}
private Object convertStringToLob(String lobId)
{
int pos = lobId.indexOf(SEPARATOR);
byte[] id = HexUtil.hexToBytes(lobId.substring(0, pos));
long size = Long.parseLong(lobId.substring(pos + SEPARATOR.length()));
return createLob(id, size);
}
protected abstract Object createLob(byte[] id, long size);
public Object replace(Object original, Object target, Object owner)
{
return original;
}
public int hashCode(Object x)
{
return x.hashCode();
}
}
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