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/*
* Copyright (c) 2011, 2012 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;
import org.eclipse.emf.cdo.common.branch.CDOBranchPoint;
import org.eclipse.emf.cdo.common.id.CDOID;
import org.eclipse.emf.cdo.common.id.CDOID.ObjectType;
import org.eclipse.emf.cdo.common.id.CDOIDUtil;
import org.eclipse.emf.cdo.common.protocol.CDODataInput;
import org.eclipse.emf.cdo.common.protocol.CDODataOutput;
import org.eclipse.emf.cdo.common.revision.CDORevision;
import org.eclipse.emf.cdo.server.db.IDBStoreAccessor;
import org.eclipse.emf.cdo.server.db.IIDHandler;
import org.eclipse.emf.cdo.server.db.mapping.ITypeMapping;
import org.eclipse.emf.cdo.server.internal.db.mapping.CoreTypeMappings;
import org.eclipse.net4j.db.DBType;
import org.eclipse.net4j.util.lifecycle.Lifecycle;
import org.eclipse.net4j.util.om.monitor.OMMonitor;
import java.io.IOException;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Collections;
import java.util.Set;
/**
* @author Eike Stepper
*/
public class UUIDHandler extends Lifecycle implements IIDHandler
{
public static final Set<ObjectType> OBJECT_ID_TYPES = Collections.singleton(ObjectType.UUID);
private static final char NULL_CHAR = '0';
private static final String NULL_STRING = Character.toString(NULL_CHAR);
private static final char INTERNAL_CHAR = '@';
private static final String INTERNAL_STRING = Character.toString(INTERNAL_CHAR);
private DBStore store;
public UUIDHandler(DBStore store)
{
this.store = store;
}
public DBStore getStore()
{
return store;
}
public int compare(CDOID id1, CDOID id2)
{
// UUIDs are not generated in strictly ordered form.
throw new UnsupportedOperationException();
}
public DBType getDBType()
{
return DBType.VARCHAR;
}
public Set<ObjectType> getObjectIDTypes()
{
return OBJECT_ID_TYPES;
}
public CDOID createCDOID(String val)
{
return create(INTERNAL_STRING + val);
}
public synchronized CDOID getLastObjectID()
{
throw new UnsupportedOperationException();
}
public synchronized void setLastObjectID(CDOID lastObjectID)
{
// Do nothing
}
public void adjustLastObjectID(CDOID maxID)
{
// Do nothing
}
public synchronized CDOID getNextLocalObjectID()
{
throw new UnsupportedOperationException();
}
public synchronized void setNextLocalObjectID(CDOID nextLocalObjectID)
{
// Do nothing
}
public synchronized CDOID getNextCDOID(CDORevision revision)
{
throw new UnsupportedOperationException();
}
@Deprecated
public boolean isLocalCDOID(CDOID id)
{
throw new UnsupportedOperationException();
}
public ITypeMapping getObjectTypeMapping()
{
return new CoreTypeMappings.TMObject();
}
public void appendCDOID(StringBuilder builder, CDOID id)
{
builder.append("'");
builder.append(value(id));
builder.append("'");
}
public void setCDOIDRaw(PreparedStatement stmt, int column, Object rawID) throws SQLException
{
stmt.setString(column, (String)rawID);
}
public void setCDOID(PreparedStatement stmt, int column, CDOID id) throws SQLException
{
setCDOID(stmt, column, id, CDOBranchPoint.INVALID_DATE);
}
public void setCDOID(PreparedStatement stmt, int column, CDOID id, long commitTime) throws SQLException
{
stmt.setString(column, value(id));
}
public CDOID getCDOID(ResultSet resultSet, int column) throws SQLException
{
String id = resultSet.getString(column);
if (resultSet.wasNull())
{
return null;
}
return create(id);
}
public CDOID getCDOID(ResultSet resultSet, String name) throws SQLException
{
String id = resultSet.getString(name);
if (resultSet.wasNull())
{
return null;
}
return create(id);
}
public CDOID getMinCDOID()
{
throw new UnsupportedOperationException();
}
public CDOID getMaxCDOID()
{
throw new UnsupportedOperationException();
}
public CDOID mapURI(IDBStoreAccessor accessor, String uri, long commitTime)
{
return CDOIDUtil.createExternal(uri);
}
public String unmapURI(IDBStoreAccessor accessor, CDOID id)
{
return CDOIDUtil.getString(id);
}
public void rawExport(Connection connection, CDODataOutput out, long fromCommitTime, long toCommitTime)
throws IOException
{
// Do nothing
}
public void rawImport(Connection connection, CDODataInput in, long fromCommitTime, long toCommitTime,
OMMonitor monitor) throws IOException
{
// Do nothing
}
private static CDOID create(String id)
{
if (id == null)
{
return null;
}
int length = id.length();
if (length == 0)
{
return null;
}
char firstChar = id.charAt(0);
if (length == 1 && firstChar == NULL_CHAR)
{
return null;
}
if (firstChar == INTERNAL_CHAR)
{
byte[] bytes = CDOIDUtil.decodeUUID(id.substring(1));
return CDOIDUtil.createUUID(bytes);
}
return CDOIDUtil.createExternal(id);
}
private static String value(CDOID id)
{
if (CDOIDUtil.isNull(id))
{
return NULL_STRING;
}
if (id.isExternal())
{
return CDOIDUtil.getString(id);
}
return INTERNAL_STRING + id.toURIFragment();
}
}
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