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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 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 ColumnNameChanger
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extends AuditedSchemaUpdaterStepBase{
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private static final Logger logger = Logger.getLogger(ColumnNameChanger.class);
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private String newColumnName;
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private String oldColumnName;
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private Datatype datatype;
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private Integer size; //only required for MySQL
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private enum Datatype{
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integer,
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clob,
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varchar,
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date
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}
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public static ColumnNameChanger NewIntegerInstance(String stepName, String tableName, String oldColumnName, String newColumnName, boolean includeAudTable){
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return new ColumnNameChanger(stepName, tableName, oldColumnName, newColumnName, includeAudTable, null, Datatype.integer, null);
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}
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public static ColumnNameChanger NewClobInstance(String stepName, String tableName, String oldColumnName,
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String newColumnName, boolean includeAudTable){
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return new ColumnNameChanger(stepName, tableName, oldColumnName, newColumnName, includeAudTable, null, Datatype.clob, null);
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}
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public static ColumnNameChanger NewVarCharInstance(String stepName, String tableName, String oldColumnName,
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String newColumnName, int size, boolean includeAudTable){
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return new ColumnNameChanger(stepName, tableName, oldColumnName, newColumnName, includeAudTable, null, Datatype.varchar, size);
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}
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public static ColumnNameChanger NewDateTimeInstance(String stepName, String tableName, String oldColumnName,
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String newColumnName, boolean includeAudTable){
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return new ColumnNameChanger(stepName, tableName, oldColumnName, newColumnName, includeAudTable, null, Datatype.date, null);
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}
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// **************************************** Constructor ***************************************/
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protected ColumnNameChanger(String stepName, String tableName, String oldColumnName,
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String newColumnName, boolean includeAudTable, Object defaultValue, Datatype datatype, Integer size) {
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super(stepName, tableName, includeAudTable);
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this.newColumnName = newColumnName;
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this.oldColumnName = oldColumnName;
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this.datatype = datatype;
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this.size = size;
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}
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@Override
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protected void invokeOnTable(String tableName, ICdmDataSource datasource,
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IProgressMonitor monitor, CaseType caseType, SchemaUpdateResult result) {
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try {
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DatabaseTypeEnum type = datasource.getDatabaseType();
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String updateQuery;
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if (type.equals(DatabaseTypeEnum.SqlServer2005)){
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logger.warn("SQLServer column name changer syntax not yet tested");
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updateQuery = "EXEC sp_rename '@oldName', '@newName'";
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}else if (type.equals(DatabaseTypeEnum.H2)){
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updateQuery = "ALTER TABLE @tableName ALTER COLUMN @oldColumnName RENAME TO @newColumnName";
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}else if ( type.equals(DatabaseTypeEnum.MySQL)){
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//FIXME MySQL column name changer
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// logger.warn("Changing column name not yet supported for MySQL");
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updateQuery = "ALTER TABLE @tableName CHANGE COLUMN @oldColumnName @newColumnName @definition";
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}else if ( type.equals(DatabaseTypeEnum.PostgreSQL) ){
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updateQuery = "ALTER TABLE @tableName RENAME COLUMN @oldColumnName TO @newColumnName;";
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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() + ", ColumnNameChanger.invokeOnTable");
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return;
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}
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updateQuery = updateQuery.replace("@tableName", tableName);
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updateQuery = updateQuery.replace("@oldColumnName", oldColumnName);
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updateQuery = updateQuery.replace("@newColumnName", newColumnName);
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updateQuery = updateQuery.replace("@definition", getDefinition());
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datasource.executeUpdate(updateQuery);
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return;
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} catch (Exception e) {
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String message = e.getMessage();
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monitor.warning(message, e);
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logger.error(e);
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result.addException(e, message, getStepName() + ", ColumnNameChanger.invokeOnTable");
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return;
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}
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}
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//TODO use same code as ColumnTypeChanger or ColumnAdder
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private CharSequence getDefinition() {
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if (this.datatype == Datatype.integer){
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return "integer";
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}else if (this.datatype == Datatype.clob){
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return "longtext";
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}else if (this.datatype == Datatype.varchar){
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return "nvarchar("+size+")";
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}else if (this.datatype == Datatype.date){
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return "datetime";
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}else{
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throw new RuntimeException("Definition type not supported");
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}
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}
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}
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