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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
* 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
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package org.apache.cayenne.dba.sybase;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.Types;
import org.apache.cayenne.access.jdbc.EJBQLTranslatorFactory;
import org.apache.cayenne.access.types.ByteArrayType;
import org.apache.cayenne.access.types.ByteType;
import org.apache.cayenne.access.types.CharType;
import org.apache.cayenne.access.types.ExtendedTypeMap;
import org.apache.cayenne.access.types.ShortType;
import org.apache.cayenne.dba.JdbcAdapter;
import org.apache.cayenne.dba.PkGenerator;
import org.apache.cayenne.merge.MergerFactory;
/**
* DbAdapter implementation for <a href="http://www.sybase.com">Sybase RDBMS</a>.
*/
public class SybaseAdapter extends JdbcAdapter {
final static String MYSQL_QUOTE_SQL_IDENTIFIERS_CHAR_START = "[";
final static String MYSQL_QUOTE_SQL_IDENTIFIERS_CHAR_END = "]";
/**
* @since 3.0
*/
@Override
public void initIdentifiersQuotes() {
this.identifiersStartQuote = MYSQL_QUOTE_SQL_IDENTIFIERS_CHAR_START;
this.identifiersEndQuote = MYSQL_QUOTE_SQL_IDENTIFIERS_CHAR_END;
}
/**
* @since 3.0
*/
@Override
protected EJBQLTranslatorFactory createEJBQLTranslatorFactory() {
return new SybaseEJBQLTranslatorFactory();
}
/**
* Returns word "go".
*
* @since 1.0.4
*/
@Override
public String getBatchTerminator() {
return "go";
}
/**
* Installs appropriate ExtendedTypes as converters for passing values between JDBC
* and Java layers.
*/
@Override
protected void configureExtendedTypes(ExtendedTypeMap map) {
super.configureExtendedTypes(map);
// create specially configured CharType handler
map.registerType(new CharType(true, false));
// create specially configured ByteArrayType handler
map.registerType(new ByteArrayType(true, false));
// address Sybase driver inability to handle java.lang.Short and java.lang.Byte
map.registerType(new ShortType(true));
map.registerType(new ByteType(true));
}
/**
* Creates and returns a primary key generator. Overrides superclass implementation to
* return an instance of SybasePkGenerator.
*/
@Override
protected PkGenerator createPkGenerator() {
return new SybasePkGenerator(this);
}
@Override
public void bindParameter(
PreparedStatement statement,
Object object,
int pos,
int sqlType,
int precision) throws SQLException, Exception {
// Sybase driver doesn't like CLOBs and BLOBs as parameters
if (object == null) {
if (sqlType == Types.CLOB) {
sqlType = Types.VARCHAR;
}
else if (sqlType == Types.BLOB) {
sqlType = Types.VARBINARY;
}
}
if (object == null && sqlType == 0) {
statement.setNull(pos, Types.VARCHAR);
}
else {
super.bindParameter(statement, object, pos, sqlType, precision);
}
}
@Override
public MergerFactory mergerFactory() {
return new SybaseMergerFactory();
}
}