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/*
* Copyright (c) 2009-2013, 2016 Eike Stepper (Loehne, 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.emf.cdo.common.id.CDOIDExternal;
import org.eclipse.emf.cdo.common.id.CDOIDUtil;
import org.eclipse.emf.cdo.common.model.CDOClassifierRef;
import org.eclipse.emf.cdo.common.revision.CDORevision;
import org.eclipse.emf.cdo.server.internal.hibernate.HibernateStoreAccessor;
import org.eclipse.emf.cdo.server.internal.hibernate.HibernateThreadContext;
import org.eclipse.emf.cdo.server.internal.hibernate.HibernateUtil;
import org.eclipse.net4j.util.WrappedException;
import org.eclipse.emf.ecore.EClass;
import org.hibernate.engine.spi.SessionImplementor;
import org.hibernate.type.StandardBasicTypes;
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, Types.VARCHAR };
private static final String SEPARATOR = "__;__"; //$NON-NLS-1$
private static final String EXTERNAL = "EXTERNAL"; //$NON-NLS-1$
/** 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, SessionImplementor sessionImplementor, Object owner) throws SQLException
{
final String value = StandardBasicTypes.STRING.nullSafeGet(rs, names[1], sessionImplementor);
if (rs.wasNull())
{
return null;
}
final String entityName = StandardBasicTypes.STRING.nullSafeGet(rs, names[0], sessionImplementor);
return deserializeId(entityName, value);
}
public void nullSafeSet(PreparedStatement statement, Object value, int index, SessionImplementor sessionImplementor) throws SQLException
{
final String entityName;
final CDOID localValue;
if (value instanceof CDORevision)
{
final CDORevision cdoRevision = (CDORevision)value;
localValue = cdoRevision.getID();
// cast to object to use correct method from hibernate util
entityName = HibernateUtil.getInstance().getEntityName((Object)cdoRevision);
}
else if (value instanceof CDOID)
{
localValue = (CDOID)value;
entityName = HibernateUtil.getInstance().getEntityName(localValue);
}
else
{
throw new IllegalArgumentException("Type " + value + " not supported here");
}
// the first column is there for backward compatibility, fill it with nulls..
final String strValue = serializeId(localValue);
if (strValue == null)
{
statement.setNull(index, Types.VARCHAR);
statement.setNull(index + 1, Types.VARCHAR);
}
else
{
statement.setString(index, entityName);
statement.setString(index + 1, strValue);
}
}
protected String serializeId(CDOID id)
{
final CDOID cdoID = HibernateUtil.getInstance().resolvePossibleTempId(id);
if (cdoID == null || cdoID.isNull())
{
return null;
}
if (cdoID.getType() == CDOID.Type.EXTERNAL_OBJECT)
{
return EXTERNAL + SEPARATOR + ((CDOIDExternal)cdoID).getURI();
}
final Serializable idValue = HibernateUtil.getInstance().getIdValue(cdoID);
return idValue + SEPARATOR + idValue.getClass().getName();
}
protected CDOID deserializeId(String entityName, String value)
{
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);
if (EXTERNAL.equals(entityName))
{
return CDOIDUtil.createExternal(idStr);
}
final Serializable idValue = getId(idStr, idClassName);
final HibernateStoreAccessor accessor = HibernateThreadContext.getCurrentStoreAccessor();
final EClass eClass = accessor.getStore().getEClass(entityName);
return HibernateUtil.getInstance().createCDOID(new CDOClassifierRef(eClass), idValue);
}
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)
{
final Class<?> idClass = Thread.currentThread().getContextClassLoader().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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