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/**
* Copyright (c) 2004 - 2009 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.id.CDOID;
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 in the contents of a resource, a many-to-any mapping.
*/
public class CDOIDAnyUserType implements UserType
{
private static final int[] SQL_TYPES = { Types.VARCHAR };
private static final String SEPARATOR = "__;__";
/** Constructor by id */
private final HashMap<String, Constructor<?>> constructors = new HashMap<String, Constructor<?>>();
public CDOIDAnyUserType()
{
}
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
{
final String value = (String)Hibernate.STRING.nullSafeGet(rs, names[0]);
if (rs.wasNull())
{
return null;
}
final int end1 = value.indexOf(SEPARATOR);
final int start2 = end1 + SEPARATOR.length();
final String idStr = value.substring(0, end1);
final String idClassName = value.substring(start2);
final Serializable id = getId(idStr, idClassName);
return id;
}
public void nullSafeSet(PreparedStatement statement, Object value, int index) throws SQLException
{
if (value == null || value instanceof CDOID && ((CDOID)value).isNull())
{
statement.setNull(index, Types.VARCHAR);
}
else
{
statement.setString(index, value.toString() + SEPARATOR + value.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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