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package org.eclipse.emf.cdo.server.internal.db;
import org.eclipse.emf.cdo.internal.protocol.revision.CDORevisionImpl;
import org.eclipse.emf.cdo.protocol.CDOID;
import org.eclipse.emf.cdo.protocol.model.CDOClass;
import org.eclipse.emf.cdo.protocol.model.CDOFeature;
import org.eclipse.emf.cdo.protocol.model.CDOPackage;
import org.eclipse.emf.cdo.server.IRepository;
import org.eclipse.emf.cdo.server.db.IDBStoreAccessor;
import org.eclipse.emf.cdo.server.db.IReferenceMapping;
import org.eclipse.net4j.db.DBType;
import org.eclipse.net4j.db.IDBTable;
import java.util.Map;
/**
* @author Eike Stepper
*/
public class ReferenceMapping extends FeatureMapping implements IReferenceMapping
{
public static final String FIELD_NAME_FEATURE = "cdo_feature";
public static final String FIELD_NAME_SOURCE = "cdo_source";
public static final String FIELD_NAME_VERSION = "cdo_version";
public static final String FIELD_NAME_IDX = "cdo_idx";
public static final String FIELD_NAME_TARGET = "cdo_target";
private IDBTable table;
private ToMany toMany;
private boolean withFeature;
private String constantPrefix;
public ReferenceMapping(ValueMapping valueMapping, CDOFeature feature, ToMany toMany)
{
super(valueMapping, feature);
this.toMany = toMany;
mapReference(valueMapping.getCDOClass(), feature);
// Build the constant SQL prefix
StringBuilder builder = new StringBuilder();
builder.append("INSERT INTO ");
builder.append(table);
builder.append(" VALUES (");
if (withFeature)
{
builder.append(FeatureServerInfo.getDBID(feature));
builder.append(", ");
}
constantPrefix = builder.toString();
}
public IDBTable getTable()
{
return table;
}
public void writeReference(IDBStoreAccessor storeAccessor, CDORevisionImpl revision)
{
int idx = 0;
long source = revision.getID().getValue();
int version = revision.getVersion();
for (Object element : revision.getList(getFeature()))
{
long target = ((CDOID)element).getValue();
StringBuilder builder = new StringBuilder(constantPrefix);
builder.append(source);
builder.append(", ");
builder.append(version);
builder.append(", ");
builder.append(idx++);
builder.append(", ");
builder.append(target);
builder.append(")");
getValueMapping().sqlUpdate(storeAccessor, builder.toString());
}
}
public void readReference(IDBStoreAccessor storeAccessor, CDORevisionImpl revision)
{
// TODO Implement method ReferenceMapping.readReference()
throw new UnsupportedOperationException("Not yet implemented");
}
protected void mapReference(CDOClass cdoClass, CDOFeature cdoFeature)
{
switch (toMany)
{
case PER_REFERENCE:
withFeature = false;
table = mapReferenceTable(cdoFeature, cdoClass.getName() + "_" + cdoFeature.getName() + "_refs");
break;
case PER_CLASS:
withFeature = true;
table = mapReferenceTable(cdoClass, cdoClass.getName() + "_refs");
break;
case PER_PACKAGE:
withFeature = true;
CDOPackage cdoPackage = cdoClass.getContainingPackage();
table = mapReferenceTable(cdoPackage, cdoPackage.getName() + "_refs");
break;
case PER_REPOSITORY:
withFeature = true;
IRepository repository = getValueMapping().getMappingStrategy().getStore().getRepository();
table = mapReferenceTable(repository, repository.getName() + "_refs");
break;
default:
throw new IllegalArgumentException("Invalid mapping: " + toMany);
}
}
protected IDBTable mapReferenceTable(Object key, String tableName)
{
Map<Object, IDBTable> referenceTables = getValueMapping().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 = getValueMapping().addTable(tableName);
if (withFeature)
{
table.addField(FIELD_NAME_FEATURE, DBType.INTEGER);
}
table.addField(FIELD_NAME_SOURCE, DBType.BIGINT);
table.addField(FIELD_NAME_VERSION, DBType.INTEGER);
table.addField(FIELD_NAME_IDX, DBType.INTEGER);
table.addField(FIELD_NAME_TARGET, DBType.BIGINT);
return table;
}
}
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