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Cayenne Object Persistence Framework
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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
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* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
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package org.apache.cayenne.access.jdbc;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;
import org.apache.cayenne.CayenneException;
import org.apache.cayenne.access.OperationObserver;
import org.apache.cayenne.access.QueryLogger;
import org.apache.cayenne.dba.DbAdapter;
import org.apache.cayenne.map.EntityResolver;
import org.apache.cayenne.query.Query;
import org.apache.cayenne.query.SQLAction;
/**
* A convenience superclass for SQLAction implementations.
*
* @since 1.2
* @author Andrei Adamchik
*/
public abstract class BaseSQLAction implements SQLAction {
protected DbAdapter adapter;
protected EntityResolver entityResolver;
public BaseSQLAction(DbAdapter adapter, EntityResolver entityResolver) {
this.adapter = adapter;
this.entityResolver = entityResolver;
}
public DbAdapter getAdapter() {
return adapter;
}
public EntityResolver getEntityResolver() {
return entityResolver;
}
/**
* Helper method to process a ResultSet.
*/
protected void readResultSet(
ResultSet resultSet,
RowDescriptor descriptor,
Query query,
OperationObserver delegate) throws SQLException, Exception {
long t1 = System.currentTimeMillis();
JDBCResultIterator resultReader = new JDBCResultIterator(
null,
null,
resultSet,
descriptor,
query.getMetaData(getEntityResolver()).getFetchLimit());
if (!delegate.isIteratedResult()) {
List resultRows = resultReader.dataRows(false);
QueryLogger
.logSelectCount(resultRows.size(), System.currentTimeMillis() - t1);
delegate.nextDataRows(query, resultRows);
}
else {
try {
resultReader.setClosingConnection(true);
delegate.nextDataRows(query, resultReader);
}
catch (Exception ex) {
try {
resultReader.close();
}
catch (CayenneException cex) {
// ignore...
}
throw ex;
}
}
}
}
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