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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.
****************************************************************/
package org.apache.cayenne.dba.ingres;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.apache.cayenne.CayenneRuntimeException;
import org.apache.cayenne.access.DataNode;
import org.apache.cayenne.access.QueryLogger;
import org.apache.cayenne.dba.oracle.OraclePkGenerator;
import org.apache.cayenne.map.DbEntity;
import org.apache.cayenne.map.DbKeyGenerator;
/**
* Ingres-specific sequence based PK generator.
*
* @since 1.2
*/
public class IngresPkGenerator extends OraclePkGenerator {
@Override
protected long longPkFromDatabase(DataNode node, DbEntity entity) throws Exception {
DbKeyGenerator pkGenerator = entity.getPrimaryKeyGenerator();
String pkGeneratingSequenceName;
if (pkGenerator != null
&& DbKeyGenerator.ORACLE_TYPE.equals(pkGenerator.getGeneratorType())
&& pkGenerator.getGeneratorName() != null)
pkGeneratingSequenceName = pkGenerator.getGeneratorName();
else
pkGeneratingSequenceName = sequenceName(entity);
Connection con = node.getDataSource().getConnection();
try {
Statement st = con.createStatement();
try {
String sql = "SELECT " + pkGeneratingSequenceName + ".nextval";
QueryLogger.logQuery(sql, Collections.EMPTY_LIST);
ResultSet rs = st.executeQuery(sql);
try {
// Object pk = null;
if (!rs.next()) {
throw new CayenneRuntimeException(
"Error generating pk for DbEntity " + entity.getName());
}
return rs.getLong(1);
}
finally {
rs.close();
}
}
finally {
st.close();
}
}
finally {
con.close();
}
}
/**
* Generates primary key by calling Oracle sequence corresponding to the
* <code>dbEntity</code>. Executed SQL looks like this:
*
* <pre>
* SELECT nextval(pk_table_name)
* </pre>
*
* @deprecated since 3.0
*/
@Override
protected int pkFromDatabase(DataNode node, DbEntity ent) throws Exception {
DbKeyGenerator pkGenerator = ent.getPrimaryKeyGenerator();
String pkGeneratingSequenceName;
if (pkGenerator != null
&& DbKeyGenerator.ORACLE_TYPE.equals(pkGenerator.getGeneratorType())
&& pkGenerator.getGeneratorName() != null)
pkGeneratingSequenceName = pkGenerator.getGeneratorName();
else
pkGeneratingSequenceName = sequenceName(ent);
Connection con = node.getDataSource().getConnection();
try {
Statement st = con.createStatement();
try {
String sql = "SELECT " + pkGeneratingSequenceName + ".nextval";
QueryLogger.logQuery(sql, Collections.EMPTY_LIST);
ResultSet rs = st.executeQuery(sql);
try {
// Object pk = null;
if (!rs.next()) {
throw new CayenneRuntimeException(
"Error generating pk for DbEntity " + ent.getName());
}
return rs.getInt(1);
}
finally {
rs.close();
}
}
finally {
st.close();
}
}
finally {
con.close();
}
}
@Override
protected List<String> getExistingSequences(DataNode node) throws SQLException {
// check existing sequences
Connection connection = node.getDataSource().getConnection();
try {
Statement select = connection.createStatement();
try {
String sql = "select seq_name from iisequences where seq_owner != 'DBA'";
QueryLogger.logQuery(sql, Collections.EMPTY_LIST);
ResultSet rs = select.executeQuery(sql);
try {
List<String> sequenceList = new ArrayList<String>();
while (rs.next()) {
String name = rs.getString(1);
if(name != null) {
sequenceList.add(name.trim());
}
}
return sequenceList;
}
finally {
rs.close();
}
}
finally {
select.close();
}
}
finally {
connection.close();
}
}
}