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* 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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package org.apache.cayenne.dbsync.merge.token.db;
import org.apache.cayenne.dba.DbAdapter;
import org.apache.cayenne.dba.JdbcAdapter;
import org.apache.cayenne.dba.QuotingStrategy;
import org.apache.cayenne.dbsync.merge.factory.MergerTokenFactory;
import org.apache.cayenne.dbsync.merge.token.MergerToken;
import org.apache.cayenne.map.DbAttribute;
import org.apache.cayenne.map.DbEntity;
import java.util.Collections;
import java.util.List;
public class AddColumnToDb extends AbstractToDbToken.EntityAndColumn {
public AddColumnToDb(DbEntity entity, DbAttribute column) {
super("Add Column", 50, entity, column);
}
/**
* append the part of the token before the actual column data type
*/
protected void appendPrefix(StringBuffer sqlBuffer, QuotingStrategy context) {
sqlBuffer.append("ALTER TABLE ");
sqlBuffer.append(context.quotedFullyQualifiedName(getEntity()));
sqlBuffer.append(" ADD COLUMN ");
sqlBuffer.append(context.quotedName(getColumn()));
sqlBuffer.append(" ");
}
@Override
public List<String> createSql(DbAdapter adapter) {
StringBuffer sqlBuffer = new StringBuffer();
QuotingStrategy context = adapter.getQuotingStrategy();
appendPrefix(sqlBuffer, context);
sqlBuffer.append(JdbcAdapter.getType(adapter, getColumn()));
sqlBuffer.append(JdbcAdapter.sizeAndPrecision(adapter, getColumn()));
return Collections.singletonList(sqlBuffer.toString());
}
@Override
public MergerToken createReverse(MergerTokenFactory factory) {
return factory.createDropColumnToModel(getEntity(), getColumn());
}
}