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/***************************************************************************
* Copyright (c) 2004 - 2008 Eike Stepper, Germany.
* 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;
import org.eclipse.emf.cdo.common.id.CDOID;
import org.eclipse.emf.cdo.common.model.CDOClass;
import org.eclipse.emf.cdo.common.model.CDOFeature;
import org.eclipse.emf.cdo.common.model.CDOPackage;
import org.eclipse.emf.cdo.common.revision.CDORevision;
import org.eclipse.emf.cdo.server.IRepository;
import org.eclipse.emf.cdo.server.IStoreChunkReader.Chunk;
import org.eclipse.emf.cdo.server.db.IDBStoreAccessor;
import org.eclipse.emf.cdo.server.db.IDBStoreChunkReader;
import org.eclipse.emf.cdo.server.db.IJDBCDelegate;
import org.eclipse.emf.cdo.server.db.IReferenceMapping;
import org.eclipse.emf.cdo.spi.common.InternalCDORevision;
import org.eclipse.net4j.db.DBType;
import org.eclipse.net4j.db.ddl.IDBField;
import org.eclipse.net4j.db.ddl.IDBTable;
import org.eclipse.net4j.db.ddl.IDBIndex.Type;
import java.util.List;
import java.util.Map;
/**
* @author Eike Stepper
*/
public class ReferenceMapping extends FeatureMapping implements IReferenceMapping
{
private IDBTable table;
private ToMany toMany;
private boolean withFeature;
public ReferenceMapping(ClassMapping classMapping, CDOFeature feature, ToMany toMany)
{
super(classMapping, feature);
this.toMany = toMany;
mapReference(classMapping.getCDOClass(), feature);
}
public IDBTable getTable()
{
return table;
}
public final void writeReference(IDBStoreAccessor accessor, CDORevision revision)
{
IJDBCDelegate jdbcDelegate = accessor.getJDBCDelegate();
int idx = 0;
for (Object element : ((InternalCDORevision)revision).getList(getFeature()))
{
jdbcDelegate.insertReference(revision, idx++, (CDOID)element, this);
}
}
public final void readReference(IDBStoreAccessor accessor, CDORevision revision, int referenceChunk)
{
accessor.getJDBCDelegate().selectRevisionReferences(revision, this, referenceChunk);
}
public final void readChunks(IDBStoreChunkReader chunkReader, List<Chunk> chunks, String where)
{
chunkReader.getAccessor().getJDBCDelegate().selectRevisionReferenceChunks(chunkReader, chunks, this, where);
}
protected void mapReference(CDOClass cdoClass, CDOFeature cdoFeature)
{
MappingStrategy mappingStrategy = getClassMapping().getMappingStrategy();
switch (toMany)
{
case PER_REFERENCE:
{
withFeature = false;
String tableName = mappingStrategy.getTableName(cdoClass) + "_" + cdoFeature.getName() + "_refs";
Object referenceMappingKey = getReferenceMappingKey(cdoFeature);
table = mapReferenceTable(referenceMappingKey, tableName);
break;
}
case PER_CLASS:
withFeature = true;
table = mapReferenceTable(cdoClass, mappingStrategy.getTableName(cdoClass) + "_refs");
break;
case PER_PACKAGE:
withFeature = true;
CDOPackage cdoPackage = cdoClass.getContainingPackage();
table = mapReferenceTable(cdoPackage, mappingStrategy.getTableName(cdoPackage) + "_refs");
break;
case PER_REPOSITORY:
withFeature = true;
IRepository repository = mappingStrategy.getStore().getRepository();
table = mapReferenceTable(repository, repository.getName() + "_refs");
break;
default:
throw new IllegalArgumentException("Invalid mapping: " + toMany);
}
}
protected Object getReferenceMappingKey(CDOFeature cdoFeature)
{
return getClassMapping().createReferenceMappingKey(cdoFeature);
}
protected IDBTable mapReferenceTable(Object key, String tableName)
{
Map<Object, IDBTable> referenceTables = getClassMapping().getMappingStrategy().getReferenceTables();
IDBTable table = referenceTables.get(key);
if (table == null)
{
table = addReferenceTable(tableName);
referenceTables.put(key, table);
}
return table;
}
protected IDBTable addReferenceTable(String tableName)
{
IDBTable table = getClassMapping().addTable(tableName);
if (withFeature)
{
table.addField(CDODBSchema.REFERENCES_FEATURE, DBType.INTEGER);
}
IDBField sourceField = table.addField(CDODBSchema.REFERENCES_SOURCE, DBType.BIGINT);
IDBField versionField = table.addField(CDODBSchema.REFERENCES_VERSION, DBType.INTEGER);
IDBField idxField = table.addField(CDODBSchema.REFERENCES_IDX, DBType.INTEGER);
table.addField(CDODBSchema.REFERENCES_TARGET, DBType.BIGINT);
table.addIndex(Type.NON_UNIQUE, sourceField, versionField);
table.addIndex(Type.NON_UNIQUE, idxField);
return table;
}
public boolean isWithFeature()
{
return withFeature;
}
}
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