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* 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
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*
* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
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package org.apache.cayenne.dba.sqlserver;
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.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;
public class SQLServerMergerFactory extends MergerFactory {
@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://msdn2.microsoft.com/en-us/library/ms190273.aspx
sqlBuffer.append("ALTER TABLE ");
sqlBuffer.append(context.quoteFullyQualifiedName(entity));
sqlBuffer.append(" ALTER COLUMN ");
sqlBuffer.append(context.quoteString(columnNew.getName()));
sqlBuffer.append(" ");
}
};
}
@Override
public MergerToken createAddColumnToDb(final DbEntity entity, final DbAttribute column) {
return new AddColumnToDb(entity, column) {
@Override
protected void appendPrefix(StringBuffer sqlBuffer, QuotingStrategy context) {
// http://msdn2.microsoft.com/en-us/library/ms190273.aspx
sqlBuffer.append("ALTER TABLE ");
sqlBuffer.append(context.quoteFullyQualifiedName(entity));
sqlBuffer.append(" ADD ");
sqlBuffer.append(context.quoteString(column.getName()));
sqlBuffer.append(" ");
}
};
}
@Override
public MergerToken createSetAllowNullToDb(DbEntity entity, final DbAttribute column) {
return new SetAllowNullToDb(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(" ALTER COLUMN ");
adapter.createTableAppendColumn(sqlBuffer, column);
return Collections.singletonList(sqlBuffer.toString());
}
};
}
@Override
public MergerToken createSetNotNullToDb(DbEntity entity, final DbAttribute column) {
return new SetNotNullToDb(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(" ALTER COLUMN ");
adapter.createTableAppendColumn(sqlBuffer, column);
return Collections.singletonList(sqlBuffer.toString());
}
};
}
}