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/**
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* Copyright (C) 2009 EDIT
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* European Distributed Institute of Taxonomy
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* http://www.e-taxonomy.eu
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* See LICENSE.TXT at the top of this package for the full license terms.
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*/
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package eu.etaxonomy.cdm.database.update;
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import java.sql.SQLException;
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import org.apache.log4j.Logger;
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import eu.etaxonomy.cdm.common.monitor.IProgressMonitor;
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import eu.etaxonomy.cdm.database.DatabaseTypeEnum;
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import eu.etaxonomy.cdm.database.ICdmDataSource;
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/**
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* @author a.mueller
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* @since 16.09.2010
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*
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*/
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public class TableNameChanger
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extends SchemaUpdaterStepBase{
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private static final Logger logger = Logger.getLogger(TableNameChanger.class);
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private String oldName;
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private String newName;
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private boolean includeAudTable;
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public static final TableNameChanger NewInstance(String stepName, String oldName, String newName, boolean includeAudTable){
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return new TableNameChanger(stepName, oldName, newName, includeAudTable);
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}
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protected TableNameChanger(String stepName, String oldName, String newName, boolean includeAudTable) {
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super(stepName);
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this.oldName = oldName;
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this.newName = newName;
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this.includeAudTable = includeAudTable;
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}
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@Override
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public void invoke(ICdmDataSource datasource, IProgressMonitor monitor,
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CaseType caseType, SchemaUpdateResult result) throws SQLException {
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invokeOnTable(caseType.transformTo(oldName), caseType.transformTo(newName),
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datasource, monitor, result);
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updateHibernateSequence(datasource, monitor, newName, oldName); //no result&= as hibernateSequence problems may not lead to a complete fail
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if (includeAudTable){
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String aud = "_AUD";
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invokeOnTable(caseType.transformTo(oldName + aud), caseType.transformTo(newName + aud),
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datasource, monitor, result);
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}
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return;
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}
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//does not support AuditedSchemaUpdaterStepBase signature
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private void invokeOnTable(String oldName, String newName, ICdmDataSource datasource,
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IProgressMonitor monitor, SchemaUpdateResult result) {
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DatabaseTypeEnum type = datasource.getDatabaseType();
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String updateQuery;
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if (type.equals(DatabaseTypeEnum.MySQL)){
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//MySQL allows both syntaxes
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updateQuery = "RENAME TABLE @oldName TO @newName";
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}else if (type.equals(DatabaseTypeEnum.H2) || type.equals(DatabaseTypeEnum.PostgreSQL) || type.equals(DatabaseTypeEnum.MySQL)){
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updateQuery = "ALTER TABLE @oldName RENAME TO @newName";
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}else if (type.equals(DatabaseTypeEnum.SqlServer2005)){
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updateQuery = "EXEC sp_rename '@oldName', '@newName'";
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}else{
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updateQuery = null;
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String message ="Update step '" + this.getStepName() + "' is not supported by " + type.getName();
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monitor.warning(message);
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result.addError(message, getStepName() + ", TableNameChanger.invokeOnTable");
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return;
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}
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updateQuery = updateQuery.replace("@oldName", oldName);
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updateQuery = updateQuery.replace("@newName", newName);
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try {
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datasource.executeUpdate(updateQuery);
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} catch (SQLException e) {
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String message = "Could not perform rename table operation";
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monitor.warning("Could not perform rename table operation", e);
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logger.warn(message+ ": " + e.getMessage());
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result.addException(e, message, getStepName() + ", TableNameChanger.invokeOnTable");
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return;
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}
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return;
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}
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/**
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*
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* @param datasource
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* @param monitor
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* @param table
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* @param oldVal
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* @return
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*/
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private boolean updateHibernateSequence(ICdmDataSource datasource, IProgressMonitor monitor, String newName, String oldName){
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try{
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//TODO do we need to "case" this table name?
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String sql = " UPDATE hibernate_sequences SET sequence_name = '%s' WHERE sequence_name = '%s'";
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datasource.executeUpdate(String.format(sql, newName ,oldName));
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return true;
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} catch (Exception e) {
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String message = "Exception occurred when trying to read or update hibernate_sequences table for value " + this.newName + ": " + e.getMessage();
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monitor.warning(message, e);
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logger.error(message);
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return false;
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}
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}
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}
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