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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:
* Eike Stepper - initial API and implementation
*/
package org.eclipse.emf.cdo.server.internal.db.mapping;
import org.eclipse.emf.cdo.common.id.CDOID;
import org.eclipse.emf.cdo.common.id.CDOIDUtil;
import org.eclipse.emf.cdo.common.model.CDOClassifierRef;
import org.eclipse.emf.cdo.common.model.EMFUtil;
import org.eclipse.emf.cdo.eresource.EresourcePackage;
import org.eclipse.emf.cdo.server.db.IDBStore;
import org.eclipse.emf.cdo.server.db.IDBStoreAccessor;
import org.eclipse.emf.cdo.server.db.IObjectTypeCache;
import org.eclipse.emf.cdo.server.db.mapping.IClassMapping;
import org.eclipse.emf.cdo.server.internal.db.CDODBSchema;
import org.eclipse.emf.cdo.server.internal.db.ObjectTypeCache;
import org.eclipse.emf.cdo.spi.common.model.InternalCDOPackageRegistry;
import org.eclipse.net4j.db.DBException;
import org.eclipse.net4j.util.lifecycle.LifecycleUtil;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EPackage;
import java.util.ArrayList;
import java.util.List;
/**
* @author Eike Stepper
*/
public class HorizontalMappingStrategy extends MappingStrategy
{
private IObjectTypeCache objectTypeCache;
public HorizontalMappingStrategy()
{
}
public String getType()
{
return "horizontal";
}
public IObjectTypeCache getObjectTypeCache()
{
return objectTypeCache;
}
public void setObjectTypeCache(IObjectTypeCache objectTypeCache)
{
this.objectTypeCache = objectTypeCache;
}
public CDOClassifierRef readObjectType(IDBStoreAccessor accessor, CDOID id)
{
return objectTypeCache.getObjectType(accessor, id);
}
/**
* TODO Stefan: Is this method still needed?
*/
@Deprecated
protected final CDOClassifierRef readObjectTypeFromClassesWithObjectInfo(IDBStoreAccessor accessor, CDOID id)
{
// String prefix = "SELECT DISTINCT " + CDODBSchema.ATTRIBUTES_CLASS + " FROM ";
// String suffix = " WHERE " + CDODBSchema.ATTRIBUTES_ID + "=" + id;
// for (EClass eClass : getClassesWithObjectInfo())
// {
// IClassMapping mapping = getClassMapping(eClass);
// if (mapping != null)
// {
// IDBTable table = mapping.getTable();
// if (table != null)
// {
// String sql = prefix + table + suffix;
// if (TRACER.isEnabled())
// {
// TRACER.trace(sql);
// }
//
// ResultSet resultSet = null;
//
// try
// {
// resultSet = accessor.getJDBCDelegate().getStatement().executeQuery(sql);
// if (resultSet.next())
// {
// int classID = resultSet.getInt(1);
// return getClassifierRef(accessor, classID);
// }
// }
// catch (SQLException ex)
// {
// throw new DBException(ex);
// }
// finally
// {
// DBUtil.close(resultSet);
// }
// }
// }
// }
throw new DBException("No object with id " + id);
}
@Override
protected IClassMapping createClassMapping(EClass eClass)
{
if (eClass.isAbstract() || eClass.isInterface())
{
return null;
}
return new HorizontalClassMapping(this, eClass);
}
@Override
protected List<EClass> getClassesWithObjectInfo()
{
List<EClass> result = new ArrayList<EClass>();
InternalCDOPackageRegistry packageRegistry = (InternalCDOPackageRegistry)getStore().getRepository()
.getPackageRegistry();
for (EPackage ePackage : packageRegistry.getEPackages())
{
for (EClass eClass : EMFUtil.getConcreteClasses(ePackage))
{
// if (!CDOModelUtil.isRoot(eClass))
{
result.add(eClass);
}
}
}
return result;
}
@Override
protected void doActivate() throws Exception
{
super.doActivate();
if (objectTypeCache == null)
{
objectTypeCache = createObjectTypeCache(getStore());
LifecycleUtil.activate(objectTypeCache);
}
}
@Override
protected String[] getResourceQueries(CDOID folderID, String name, boolean exactMatch)
{
String[] queries = new String[2];
IClassMapping resourceFolderMapping = getClassMapping(EresourcePackage.eINSTANCE.getCDOResourceFolder());
queries[0] = getResourceQuery(folderID, name, exactMatch, resourceFolderMapping);
IClassMapping resourceMapping = getClassMapping(EresourcePackage.eINSTANCE.getCDOResource());
queries[1] = getResourceQuery(folderID, name, exactMatch, resourceMapping);
return queries;
}
protected String getResourceQuery(CDOID folderID, String name, boolean exactMatch, IClassMapping classMapping)
{
StringBuilder builder = new StringBuilder();
builder.append("SELECT ");
builder.append(CDODBSchema.ATTRIBUTES_ID);
builder.append(" FROM ");
builder.append(classMapping.getTable());
builder.append(" WHERE ");
builder.append(CDODBSchema.ATTRIBUTES_CONTAINER);
builder.append("=");
builder.append(CDOIDUtil.getLong(folderID));
if (exactMatch || name != null)
{
builder.append(" AND ");
builder.append(classMapping.getAttributeMapping(EresourcePackage.eINSTANCE.getCDOResourceNode_Name()).getField());
if (exactMatch)
{
if (name == null)
{
builder.append(" IS NULL");
}
else
{
builder.append("=\'");
builder.append(name);
builder.append("\'");
}
}
else
{
// Here: name != null
builder.append(" LIKE \'");
builder.append(name);
builder.append("%\'");
}
}
String sql = builder.toString();
return sql;
}
@Override
protected void doDeactivate() throws Exception
{
LifecycleUtil.deactivate(objectTypeCache);
objectTypeCache = null;
super.doDeactivate();
}
protected IObjectTypeCache createObjectTypeCache(IDBStore store)
{
ObjectTypeCache cache = new ObjectTypeCache();
cache.setMappingStrategy(this);
return cache;
}
}
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