server/runtime/org.argeo.server.core/src/main/java/org/argeo/server/dao/LightDaoSupport.java

   1 /*
   2  * Copyright (C) 2007-2012 Mathieu Baudier
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *         http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package org.argeo.server.dao;
  17
  18 import java.util.List;
  19
  20 /** Minimal generic DAO for easy to implements objects <-> storage mapping. */
  21 public interface LightDaoSupport {
  22         /** Retrieve an object of a given type by its unique key. */
  23         public <T> T getByKey(Class<T> clss, Object key);
  24
  25         /** Retrieve an object of a given type by the value of one of its fields. */
  26         public <T> T getByField(Class<T> clss, String field, Object value);
  27
  28         /** List all objects, optionally filtering them (implementation dependent) */
  29         public <T> List<T> list(Class<T> clss, Object filter);
  30
  31         /** Lis all supported object types. */
  32         public List<Class<?>> getSupportedClasses();
  33
  34         /** Save or update an object */
  35         public void saveOrUpdate(Object key, Object value, Class<?> clss);
  36 }