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* 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.
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package org.apache.cayenne.dba.sybase;
import java.util.Collections;
import java.util.List;
import org.apache.cayenne.dba.DbAdapter;
import org.apache.cayenne.dba.QuotingStrategy;
import org.apache.cayenne.map.DbAttribute;
import org.apache.cayenne.map.DbEntity;
import org.apache.cayenne.merge.AddColumnToDb;
import org.apache.cayenne.merge.DropColumnToDb;
import org.apache.cayenne.merge.MergerFactory;
import org.apache.cayenne.merge.MergerToken;
import org.apache.cayenne.merge.SetAllowNullToDb;
import org.apache.cayenne.merge.SetColumnTypeToDb;
import org.apache.cayenne.merge.SetNotNullToDb;
/**
* @since 3.0
*/
public class SybaseMergerFactory extends MergerFactory {
/**
* @since 3.0
*/
@Override
public MergerToken createAddColumnToDb(DbEntity entity, final DbAttribute column) {
return new AddColumnToDb(entity, column) {
@Override
public List<String> createSql(DbAdapter adapter) {
StringBuffer sqlBuffer = new StringBuffer();
QuotingStrategy context = adapter.getQuotingStrategy(getEntity()
.getDataMap()
.isQuotingSQLIdentifiers());
sqlBuffer.append("ALTER TABLE ");
sqlBuffer.append(context.quoteFullyQualifiedName(getEntity()));
sqlBuffer.append(" ADD ");
boolean magnatory = column.isMandatory();
column.setMandatory(false);
adapter.createTableAppendColumn(sqlBuffer, column);
if(magnatory){
column.setMandatory(magnatory);
}
return Collections.singletonList(sqlBuffer.toString());
}
};
}
/**
* @since 3.0
*/
@Override
public MergerToken createDropColumnToDb(DbEntity entity, DbAttribute column) {
return new DropColumnToDb(entity, column) {
@Override
public List<String> createSql(DbAdapter adapter) {
StringBuilder sqlBuffer = new StringBuilder();
QuotingStrategy context = adapter.getQuotingStrategy(getEntity()
.getDataMap()
.isQuotingSQLIdentifiers());
sqlBuffer.append("ALTER TABLE ");
sqlBuffer.append(context.quoteFullyQualifiedName(getEntity()));
sqlBuffer.append(" DROP ");
sqlBuffer.append(context.quoteString(getColumn().getName()));
return Collections.singletonList(sqlBuffer.toString());
}
};
}
/**
* @since 3.0
*/
@Override
public MergerToken createSetNotNullToDb(DbEntity entity, DbAttribute column) {
return new SetNotNullToDb(entity, column) {
@Override
public List<String> createSql(DbAdapter adapter) {
StringBuffer sqlBuffer = createStringQuery(
adapter,
getEntity(),
getColumn());
return Collections.singletonList(sqlBuffer.toString());
}
};
}
/**
* @since 3.0
*/
@Override
public MergerToken createSetAllowNullToDb(DbEntity entity, DbAttribute column) {
return new SetAllowNullToDb(entity, column) {
@Override
public List<String> createSql(DbAdapter adapter) {
StringBuffer sqlBuffer = createStringQuery(
adapter,
getEntity(),
getColumn());
return Collections.singletonList(sqlBuffer.toString());
}
};
}
/**
* @since 3.0
*/
@Override
public MergerToken createSetColumnTypeToDb(
final DbEntity entity,
DbAttribute columnOriginal,
final DbAttribute columnNew) {
return new SetColumnTypeToDb(entity, columnOriginal, columnNew) {
@Override
protected void appendPrefix(StringBuffer sqlBuffer, QuotingStrategy context) {
// http://dev.mysql.com/tech-resources/articles/mysql-cluster-50.html
sqlBuffer.append("ALTER TABLE ");
sqlBuffer.append(context.quoteFullyQualifiedName(entity));
sqlBuffer.append(" MODIFY ");
sqlBuffer.append(context.quoteString(columnNew.getName()));
sqlBuffer.append(" ");
}
};
}
private static StringBuffer createStringQuery(
DbAdapter adapter,
DbEntity entity,
DbAttribute column) {
StringBuffer sqlBuffer = new StringBuffer();
QuotingStrategy context = adapter.getQuotingStrategy(entity
.getDataMap()
.isQuotingSQLIdentifiers());
sqlBuffer.append("ALTER TABLE ");
sqlBuffer.append(context.quoteFullyQualifiedName(entity));
sqlBuffer.append(" MODIFY ");
adapter.createTableAppendColumn(sqlBuffer, column);
return sqlBuffer;
}
}