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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 ColumnTypeChanger
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extends AuditedSchemaUpdaterStepBase {
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private static final Logger logger = Logger.getLogger(ColumnTypeChanger.class);
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private final String columnName;
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private final String newColumnType;
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private final Object defaultValue;
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private final boolean isNotNull;
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private final String referencedTable;
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public static final ColumnTypeChanger NewStringSizeInstance(String stepName, String tableName, String columnName, int newSize, boolean includeAudTable){
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return new ColumnTypeChanger(stepName, tableName, columnName, "nvarchar("+newSize+")", includeAudTable, null, false, null);
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}
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public static final ColumnTypeChanger NewClobInstance(String stepName, String tableName, String columnName, boolean includeAudTable){
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return new ColumnTypeChanger(stepName, tableName, columnName, "clob", includeAudTable, null, false, null);
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}
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public static final ColumnTypeChanger NewInt2DoubleInstance(String stepName, String tableName, String columnName, boolean includeAudTable){
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return new ColumnTypeChanger(stepName, tableName, columnName, "double", includeAudTable, null, false, null);
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}
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public static final ColumnTypeChanger NewInt2StringInstance(String stepName, String tableName, String columnName, int size, boolean includeAudTable, Integer defaultValue, boolean notNull){
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return new ColumnTypeChanger(stepName, tableName, columnName, "nvarchar("+size+")", includeAudTable, defaultValue, notNull, null);
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}
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// public static final ColumnTypeChanger NewChangeAllowNullOnStringChanger(){
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//
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// }
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protected ColumnTypeChanger(String stepName, String tableName, String columnName, String newColumnType, boolean includeAudTable, Object defaultValue, boolean notNull, String referencedTable) {
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super(stepName, tableName, includeAudTable);
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this.columnName = columnName;
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this.newColumnType = newColumnType;
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this.defaultValue = defaultValue;
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this.isNotNull = notNull;
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this.referencedTable = referencedTable;
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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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String updateQuery;
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if (this.isNotNull){
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updateQuery = getNotNullUpdateQuery(tableName);
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datasource.executeUpdate(updateQuery);
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}
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updateQuery = getUpdateQueryString(tableName, datasource, monitor);
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datasource.executeUpdate(updateQuery);
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if (defaultValue instanceof Boolean){
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updateQuery = "UPDATE @tableName SET @columnName = " + (defaultValue == null ? "null" : getBoolean((Boolean) defaultValue, datasource));
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updateQuery = updateQuery.replace("@tableName", tableName);
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updateQuery = updateQuery.replace("@columnName", columnName);
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datasource.executeUpdate(updateQuery);
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}
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if (referencedTable != null){
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TableCreator.makeForeignKey(tableName, datasource, monitor, columnName, referencedTable, caseType, result);
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}
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return;
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} catch ( Exception e) {
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String message = "Unhandled exception when trying to change column type for " +
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columnName + " for table " + tableName;
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monitor.warning(message, e);
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logger.error(e);
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result.addException(e, message, getStepName());
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return;
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}
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}
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private String getNotNullUpdateQuery(String tableName) {
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String query = " UPDATE %s SET %s = %S WHERE %s IS NULL ";
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String defaultValueStr = String.valueOf(this.defaultValue);
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if (this.defaultValue instanceof Integer){
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//OK
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}else{
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defaultValueStr = "'" + defaultValueStr + "'";
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}
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query = String.format(query, tableName, this.columnName, defaultValueStr, this.columnName);
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return query;
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}
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public String getUpdateQueryString(String tableName, ICdmDataSource datasource, IProgressMonitor monitor) throws DatabaseTypeNotSupportedException {
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String updateQuery;
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DatabaseTypeEnum type = datasource.getDatabaseType();
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String databaseColumnType = getDatabaseColumnType(datasource, this.newColumnType);
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if (type.equals(DatabaseTypeEnum.SqlServer2005)){
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//MySQL allows both syntaxes
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updateQuery = "ALTER TABLE @tableName ALTER COLUMN @columnName @columnType";
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}else if (type.equals(DatabaseTypeEnum.H2)){
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updateQuery = "ALTER TABLE @tableName ALTER COLUMN @columnName @columnType";
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}else if (type.equals(DatabaseTypeEnum.PostgreSQL)){
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updateQuery = "ALTER TABLE @tableName ALTER COLUMN @columnName TYPE @columnType";
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}else if (type.equals(DatabaseTypeEnum.MySQL)){
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updateQuery = "ALTER TABLE @tableName MODIFY COLUMN @columnName @columnType";
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}else{
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updateQuery = null;
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String warning = "Update step '" + this.getStepName() + "' is not supported by " + type.getName();
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monitor.warning(warning);
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throw new DatabaseTypeNotSupportedException(warning);
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}
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if (isNotNull){
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if (datasource.getDatabaseType().equals(DatabaseTypeEnum.PostgreSQL)){
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logger.warn("NOT NULL not implementd for POSTGRES");
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}else{
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updateQuery += " NOT NULL";
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}
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} else{
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if (! datasource.getDatabaseType().equals(DatabaseTypeEnum.PostgreSQL)){
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updateQuery += " NULL ";
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}
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}
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updateQuery = updateQuery.replace("@tableName", tableName);
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updateQuery = updateQuery.replace("@columnName", columnName);
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updateQuery = updateQuery.replace("@columnType", databaseColumnType);
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// updateQuery = updateQuery.replace("@addSeparator", getAddColumnSeperator(datasource));
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return updateQuery;
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}
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private String getDatabaseColumnType(ICdmDataSource datasource, String columnType) {
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return ColumnAdder.getDatabaseColumnType(datasource, columnType);
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}
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public String getReferencedTable() {
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return referencedTable;
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}
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//
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// public String getNewColumnName() {
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// return columnName;
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// }
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}
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