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/***************************************************************************
* Copyright (c) 2004 - 2007 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.internal.protocol.revision.CDORevisionImpl;
import org.eclipse.emf.cdo.protocol.model.CDOClass;
import org.eclipse.emf.cdo.protocol.model.CDOFeature;
import org.eclipse.emf.cdo.server.db.IAttributeMapping;
import org.eclipse.emf.cdo.server.db.IDBStoreAccessor;
import org.eclipse.emf.cdo.server.db.IReferenceMapping;
import org.eclipse.emf.cdo.server.internal.db.bundle.OM;
import org.eclipse.net4j.db.IDBField;
import org.eclipse.net4j.internal.util.om.trace.ContextTracer;
import java.util.ArrayList;
import java.util.List;
/**
* @author Eike Stepper
*/
public abstract class ValueMapping extends Mapping
{
private static final long NO_TIMESTAMP = 0L;
private static final ContextTracer TRACER = new ContextTracer(OM.DEBUG, ValueMapping.class);
private List<IAttributeMapping> attributeMappings;
private List<IReferenceMapping> referenceMappings;
public ValueMapping(MappingStrategy mappingStrategy, CDOClass cdoClass, CDOFeature[] features)
{
super(mappingStrategy, cdoClass);
initTable(getTable(), hasFullRevisionInfo());
attributeMappings = createAttributeMappings(features);
referenceMappings = createReferenceMappings(features);
}
public List<IAttributeMapping> getAttributeMappings()
{
return attributeMappings;
}
public List<IReferenceMapping> getReferenceMappings()
{
return referenceMappings;
}
public void writeRevision(IDBStoreAccessor storeAccessor, CDORevisionImpl revision)
{
if (attributeMappings != null)
{
writeAttributes(storeAccessor, revision);
}
if (referenceMappings != null)
{
writeReferences(storeAccessor, revision);
}
}
public void readRevision(IDBStoreAccessor storeAccessor, CDORevisionImpl revision)
{
readRevision(storeAccessor, revision, NO_TIMESTAMP);
}
public void readRevision(IDBStoreAccessor storeAccessor, CDORevisionImpl revision, long timeStamp)
{
if (attributeMappings != null)
{
readAttributes(storeAccessor, revision, timeStamp);
}
if (referenceMappings != null)
{
readReferences(storeAccessor, revision);
}
}
protected void writeAttributes(IDBStoreAccessor storeAccessor, CDORevisionImpl revision)
{
StringBuilder builder = new StringBuilder();
builder.append("INSERT INTO ");
builder.append(getTable());
builder.append(" VALUES (");
appendRevisionInfos(builder, revision, hasFullRevisionInfo());
for (IAttributeMapping attributeMapping : attributeMappings)
{
builder.append(", ");
attributeMapping.appendValue(builder, revision);
}
builder.append(")");
sqlUpdate(storeAccessor, builder.toString());
}
protected void writeReferences(IDBStoreAccessor storeAccessor, CDORevisionImpl revision)
{
for (IReferenceMapping referenceMapping : referenceMappings)
{
referenceMapping.writeReference(storeAccessor, revision);
}
}
protected void readAttributes(IDBStoreAccessor storeAccessor, CDORevisionImpl revision, long timeStamp)
{
IDBField[] fields = getTable().getFields();
StringBuilder builder = new StringBuilder();
builder.append("SELECT ");
for (int i = 1; i < 8; i++)
{
if (i > 1)
{
builder.append(", ");
}
builder.append(fields[i].getName());
}
builder.append(" FROM ");
builder.append(getTable());
builder.append(" WHERE ");
builder.append(fields[0].getName());
builder.append("=");
builder.append(revision.getID().getValue());
builder.append(" AND ");
builder.append(fields[0].getName());
builder.append("=0");
for (IAttributeMapping attributeMapping : attributeMappings)
{
builder.append(", ");
attributeMapping.appendValue(builder, revision);
}
builder.append(")");
String sql = builder.toString();
if (TRACER.isEnabled())
{
TRACER.trace(sql);
}
}
protected void readReferences(IDBStoreAccessor storeAccessor, CDORevisionImpl revision)
{
for (IReferenceMapping referenceMapping : referenceMappings)
{
referenceMapping.readReference(storeAccessor, revision);
}
}
protected List<IAttributeMapping> createAttributeMappings(CDOFeature[] features)
{
List<IAttributeMapping> attributeMappings = new ArrayList<IAttributeMapping>();
for (CDOFeature feature : features)
{
if (feature.isReference())
{
if (!feature.isMany())
{
attributeMappings.add(createToOneReferenceMapping(feature));
}
}
else
{
attributeMappings.add(createAttributeMapping(feature));
}
}
return attributeMappings.isEmpty() ? null : attributeMappings;
}
protected List<IReferenceMapping> createReferenceMappings(CDOFeature[] features)
{
List<IReferenceMapping> referenceMappings = new ArrayList<IReferenceMapping>();
for (CDOFeature feature : features)
{
if (feature.isReference() && feature.isMany())
{
referenceMappings.add(createReferenceMapping(feature));
}
}
return referenceMappings.isEmpty() ? null : referenceMappings;
}
protected AttributeMapping createAttributeMapping(CDOFeature feature)
{
return new AttributeMapping(this, feature);
}
protected ToOneReferenceMapping createToOneReferenceMapping(CDOFeature feature)
{
return new ToOneReferenceMapping(this, feature);
}
protected ReferenceMapping createReferenceMapping(CDOFeature feature)
{
return new ReferenceMapping(this, feature, ToMany.PER_REFERENCE);
}
protected abstract boolean hasFullRevisionInfo();
}
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