| /* |
| * Copyright (c) 2011, 2012, 2016 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(); |
| } |
| } |