package org.apache.ddlutils.platform.mckoi;
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.HashMap;
import java.util.Map;
import org.apache.commons.collections.map.ListOrderedMap;
import org.apache.ddlutils.Platform;
import org.apache.ddlutils.model.Column;
import org.apache.ddlutils.model.Table;
import org.apache.ddlutils.model.TypeMap;
import org.apache.ddlutils.platform.DatabaseMetaDataWrapper;
import org.apache.ddlutils.platform.JdbcModelReader;
/**
* Reads a database model from a Mckoi database.
*
* @version $Revision: $
*/
public class MckoiModelReader extends JdbcModelReader
{
/**
* Creates a new model reader for Mckoi databases.
*
* @param platform The platform that this model reader belongs to
*/
public MckoiModelReader(Platform platform)
{
super(platform);
setDefaultCatalogPattern(null);
setDefaultSchemaPattern(null);
}
/**
* {@inheritDoc}
*/
protected Table readTable(DatabaseMetaDataWrapper metaData, Map values) throws SQLException
{
Table table = super.readTable(metaData, values);
if (table != null)
{
// Mckoi does not currently return unique indices in the metadata so we have to query
// internal tables to get this info
StringBuffer query = new StringBuffer();
query.append("SELECT uniqueColumns.column, uniqueColumns.seq_no, uniqueInfo.name");
query.append(" FROM SYS_INFO.sUSRUniqueColumns uniqueColumns, SYS_INFO.sUSRUniqueInfo uniqueInfo");
query.append(" WHERE uniqueColumns.un_id = uniqueInfo.id AND uniqueInfo.table = '");
query.append(table.getName());
if (table.getSchema() != null)
{
query.append("' AND uniqueInfo.schema = '");
query.append(table.getSchema());
}
query.append("'");
Statement stmt = getConnection().createStatement();
ResultSet resultSet = stmt.executeQuery(query.toString());
Map indices = new ListOrderedMap();
Map indexValues = new HashMap();
indexValues.put("NON_UNIQUE", Boolean.FALSE);
while (resultSet.next())
{
indexValues.put("COLUMN_NAME", resultSet.getString(1));
indexValues.put("ORDINAL_POSITION", new Short(resultSet.getShort(2)));
indexValues.put("INDEX_NAME", resultSet.getString(3));
readIndex(metaData, indexValues, indices);
}
resultSet.close();
table.addIndices(indices.values());
}
return table;
}
/**
* {@inheritDoc}
*/
protected Column readColumn(DatabaseMetaDataWrapper metaData, Map values) throws SQLException
{
Column column = super.readColumn(metaData, values);
if (column.getSize() != null)
{
if (column.getSizeAsInt() <= 0)
{
column.setSize(null);
}
}
String defaultValue = column.getDefaultValue();
if (defaultValue != null)
{
if (defaultValue.toLowerCase().startsWith("nextval('") ||
defaultValue.toLowerCase().startsWith("uniquekey('"))
{
column.setDefaultValue(null);
column.setAutoIncrement(true);
}
else if (TypeMap.isTextType(column.getTypeCode()))
{
column.setDefaultValue(unescape(column.getDefaultValue(), "'", "\\'"));
}
}
return column;
}
}