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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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* @date 16.09.2010
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*
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*/
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public class ColumnNameChanger extends AuditedSchemaUpdaterStepBase<ColumnNameChanger> implements ISchemaUpdaterStep {
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private static final Logger logger = Logger.getLogger(ColumnNameChanger.class);
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private final String newColumnName;
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private final String oldColumnName;
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private final Datatype datatype; //TODO make enum
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private enum Datatype{
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integer,
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clob
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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);
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}
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public static ColumnNameChanger NewClobInstance(String stepName, String tableName, String oldColumnName, String newColumnName, boolean includeAudTable){
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return new ColumnNameChanger(stepName, tableName, oldColumnName, newColumnName, includeAudTable, null, Datatype.clob);
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}
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protected ColumnNameChanger(String stepName, String tableName, String oldColumnName, String newColumnName, boolean includeAudTable, Object defaultValue, Datatype datatype) {
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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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}
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@Override
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protected boolean invokeOnTable(String tableName, ICdmDataSource datasource, IProgressMonitor monitor, CaseType caseType) {
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try {
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boolean result = true;
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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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monitor.warning("Update step '" + this.getStepName() + "' is not supported by " + type.getName());
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return false;
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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 result;
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} catch (Exception e) {
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monitor.warning(e.getMessage(), e);
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logger.error(e);
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return false;
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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{
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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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