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* 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
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package org.apache.cayenne.dba.mysql;
import java.util.Collections;
import java.util.List;
import org.apache.cayenne.dba.DbAdapter;
import org.apache.cayenne.map.DbAttribute;
import org.apache.cayenne.map.DbEntity;
import org.apache.cayenne.map.DbRelationship;
import org.apache.cayenne.merge.DropRelationshipToDb;
import org.apache.cayenne.merge.MergerFactory;
import org.apache.cayenne.merge.MergerToken;
import org.apache.cayenne.merge.SetColumnTypeToDb;
import org.apache.cayenne.merge.SetNotNullToDb;
public class MySQLMergerFactory extends MergerFactory {
@Override
public MergerToken createSetNotNullToDb(
final DbEntity entity,
final DbAttribute column) {
return new SetNotNullToDb(entity, column) {
@Override
public List<String> createSql(DbAdapter adapter) {
StringBuffer sqlBuffer = new StringBuffer();
sqlBuffer.append("ALTER TABLE ");
sqlBuffer.append(getEntity().getFullyQualifiedName());
sqlBuffer.append(" CHANGE ");
sqlBuffer.append(getColumn().getName());
sqlBuffer.append(" ");
sqlBuffer.append(getColumn().getName());
sqlBuffer.append(" ");
adapter.createTableAppendColumn(sqlBuffer, column);
return Collections.singletonList(sqlBuffer.toString());
}
};
}
@Override
public MergerToken createSetColumnTypeToDb(
final DbEntity entity,
DbAttribute columnOriginal,
final DbAttribute columnNew) {
return new SetColumnTypeToDb(entity, columnOriginal, columnNew) {
@Override
protected void appendPrefix(StringBuffer sqlBuffer) {
// http://dev.mysql.com/tech-resources/articles/mysql-cluster-50.html
sqlBuffer.append("ALTER TABLE ");
sqlBuffer.append(entity.getFullyQualifiedName());
sqlBuffer.append(" MODIFY ");
sqlBuffer.append(columnNew.getName());
sqlBuffer.append(" ");
}
};
}
@Override
public MergerToken createDropRelationshipToDb(
final DbEntity entity,
DbRelationship rel) {
return new DropRelationshipToDb(entity, rel) {
@Override
public List<String> createSql(DbAdapter adapter) {
String fkName = getFkName();
if (fkName == null) {
return Collections.emptyList();
}
StringBuilder buf = new StringBuilder();
// http://dev.mysql.com/tech-resources/articles/mysql-cluster-50.html
buf.append("ALTER TABLE ");
buf.append(entity.getFullyQualifiedName());
buf.append(" DROP FOREIGN KEY ");
buf.append(fkName);
return Collections.singletonList(buf.toString());
}
};
}
}