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/***************************************************************************
* Copyright (c) 2008 - 2008 Martin Taal 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
**************************************************************************/
package org.eclipse.emf.cdo.server.internal.hibernate.tuplizer;
import org.eclipse.emf.cdo.common.id.CDOID;
import org.eclipse.emf.cdo.common.id.CDOIDTemp;
import org.eclipse.emf.cdo.common.revision.CDORevision;
import org.eclipse.emf.cdo.server.hibernate.id.CDOIDHibernate;
import org.eclipse.emf.cdo.server.hibernate.internal.id.CDOIDHibernateFactoryImpl;
import org.eclipse.emf.cdo.server.internal.hibernate.HibernateUtil;
import org.eclipse.net4j.util.WrappedException;
import org.hibernate.Hibernate;
import org.hibernate.usertype.UserType;
import java.io.Serializable;
import java.lang.reflect.Constructor;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
import java.util.HashMap;
/**
* Persists a CDOID in the DB.
*/
public class CDOIDUserType implements UserType
{
/**
* 1) entityname, 2) id, 3) id class name
*/
private static final int[] SQL_TYPES = { Types.VARCHAR, Types.VARCHAR, Types.VARCHAR };
/** Constructor by id */
private final HashMap<String, Constructor<?>> constructors = new HashMap<String, Constructor<?>>();
public CDOIDUserType()
{
}
public int[] sqlTypes()
{
return SQL_TYPES;
}
public Class<?> returnedClass()
{
return CDOID.class;
}
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, Object owner) throws SQLException
{
String entityName = (String)Hibernate.STRING.nullSafeGet(rs, names[0]);
if (rs.wasNull())
{
return null;
}
String idStr = (String)Hibernate.STRING.nullSafeGet(rs, names[1]);
if (rs.wasNull())
{
return null;
}
String idClassName = (String)Hibernate.STRING.nullSafeGet(rs, names[2]);
if (rs.wasNull())
{
return null;
}
Serializable id = getId(idStr, idClassName);
return CDOIDHibernateFactoryImpl.getInstance().createCDOID(id, entityName);
}
public void nullSafeSet(PreparedStatement statement, Object value, int index) throws SQLException
{
if (value == null)
{
statement.setNull(index, Types.VARCHAR);
statement.setNull(index, Types.VARCHAR);
statement.setNull(index, Types.VARCHAR);
}
if (value != null)
{
CDOIDHibernate cdoID;
if (value instanceof CDOIDTemp)
{
cdoID = HibernateUtil.getInstance().getCDOIDHibernate((CDOID)value);
}
else if (value instanceof CDORevision)
{
cdoID = (CDOIDHibernate)((CDORevision)value).getID();
}
else
{
cdoID = (CDOIDHibernate)value;
}
statement.setString(index, cdoID.getEntityName());
statement.setString(index + 1, cdoID.getId().toString());
statement.setString(index + 2, cdoID.getId().getClass().getName());
}
}
public Serializable disassemble(Object value)
{
return (Serializable)value;
}
public Object assemble(Serializable cachedValue, Object owner)
{
return cachedValue;
}
public Object replace(Object original, Object target, Object owner)
{
return original;
}
public int hashCode(Object x)
{
return x.hashCode();
}
/** Creates an id object of the correct type */
private Serializable getId(String idStr, String idType)
{
try
{
Constructor<?> constructor = constructors.get(idType);
if (constructor == null)
{
Class<?> idClass = this.getClass().getClassLoader().loadClass(idType);
constructor = idClass.getConstructor(new Class[] { String.class });
constructors.put(idType, constructor);
}
return (Serializable)constructor.newInstance(new Object[] { idStr });
}
catch (Exception e)
{
throw WrappedException.wrap(e);
}
}
}
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