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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 StringIDHandler extends Lifecycle implements IIDHandler
{
public static final Set<ObjectType> OBJECT_ID_TYPES = Collections.singleton(CDOID.ObjectType.STRING);
public static final CDOID MIN = CDOID.NULL;
public static final CDOID MAX = create(Long.toString(Long.MAX_VALUE));
private DBStore store;
private long lastObjectID = 0;
private long nextLocalObjectID = Long.MAX_VALUE;
public StringIDHandler(DBStore store)
{
this.store = store;
}
public DBStore getStore()
{
return store;
}
public int compare(CDOID id1, CDOID id2)
{
if (id1.getType() == CDOID.Type.OBJECT && id2.getType() == CDOID.Type.OBJECT)
{
return Long.valueOf(value(id1)).compareTo(Long.valueOf(value(id2)));
}
return id1.compareTo(id2);
}
public DBType getDBType()
{
return DBType.VARCHAR;
}
public Set<ObjectType> getObjectIDTypes()
{
return OBJECT_ID_TYPES;
}
public CDOID createCDOID(String val)
{
return create(val);
}
public synchronized CDOID getLastObjectID()
{
return CDOIDUtil.createString("" + lastObjectID);
}
public synchronized void setLastObjectID(CDOID lastObjectID)
{
this.lastObjectID = Long.parseLong(value(lastObjectID));
}
public synchronized CDOID getNextLocalObjectID()
{
return CDOIDUtil.createString("" + nextLocalObjectID);
}
public synchronized void setNextLocalObjectID(CDOID nextLocalObjectID)
{
this.nextLocalObjectID = Long.parseLong(value(nextLocalObjectID));
}
public synchronized CDOID getNextCDOID(CDORevision revision)
{
if (revision.getBranch().isLocal())
{
return CDOIDUtil.createString("" + nextLocalObjectID--);
}
return CDOIDUtil.createString("" + ++lastObjectID);
}
public boolean isLocalCDOID(CDOID id)
{
if (id.getType() == CDOID.Type.OBJECT)
{
return Long.parseLong(value(id)) > nextLocalObjectID;
}
return false;
}
public ITypeMapping getObjectTypeMapping()
{
return new CoreTypeMappings.TMObject();
}
public void appendCDOID(StringBuilder builder, CDOID id)
{
builder.append("'");
builder.append(value(id));
builder.append("'");
}
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
{
String value = value(id);
stmt.setString(column, value == null || value.length() == 0 ? "0" : value);
}
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()
{
return MIN;
}
public CDOID getMaxCDOID()
{
return MAX;
}
public CDOID mapURI(IDBStoreAccessor accessor, String uri, long commitTime)
{
return create(uri);
}
public String unmapURI(IDBStoreAccessor accessor, CDOID id)
{
return value(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 == '0')
{
return null;
}
if (Character.isDigit(firstChar))
{
long value = Long.parseLong(id);
if (value < 0)
{
throw new IllegalArgumentException("Illegal ID value: " + id);
}
return CDOIDUtil.createString(id);
}
return CDOIDUtil.createExternal(id);
}
private static String value(CDOID id)
{
return CDOIDUtil.getString(id);
}
}
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