/* * 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(); } }