/* | |
* 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.empire.spring; | |
import org.apache.empire.db.DBReader; | |
/** | |
* Callback interface to use with {@link EmpireTemplate}'s query methods. | |
* Implementations of this interface perform the actual work of extracting | |
* results from a {@link DBReader}. | |
* | |
* This class is the Empire equivalent of Spring's | |
* {@link org.springframework.jdbc.core.ResultSetExtractor}. | |
*/ | |
public interface DBReaderExtractor<K> { | |
/** | |
* Implementations must implement this method to process the entire | |
* DBReader. Unlike DBRecordMapper and DBRecordCallbackHandler it's the | |
* developer's response to iterate through the reader calling reader.next(); | |
* | |
* @param reader | |
* to process | |
* @return the result object, can be null | |
*/ | |
K process(DBReader reader); | |
} |