mirror of https://github.com/apache/cloudstack.git
71 lines
2.5 KiB
Java
71 lines
2.5 KiB
Java
// Copyright 2012 Citrix Systems, Inc. Licensed under the
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// Apache License, Version 2.0 (the "License"); you may not use this
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// file except in compliance with the License. Citrix Systems, Inc.
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// reserves all rights not expressly granted by the License.
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// You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// Automatically generated by addcopyright.py at 04/03/2012
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package com.cloud.dao;
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import java.io.Serializable;
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import java.util.List;
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import com.cloud.utils.db.GenericSearchBuilder;
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import com.cloud.utils.db.SearchBuilder;
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import com.cloud.utils.db.SearchCriteria;
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/**
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* Generic Entity Manager to retrieve database objects.
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*
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*/
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public interface EntityManager {
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/**
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* Finds an entity by its id.
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* @param <T> class of the entity you're trying to find.
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* @param <K> class of the id that the entity uses.
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* @param entityType Type of the entity.
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* @param id id value
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* @return T if found; null if not.
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*/
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public <T, K extends Serializable> T findById(Class<T> entityType, K id);
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/**
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* Finds an entity by external id which is always String
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* @param <T> entity class
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* @param entityType type of entity you're looking for.
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* @param xid external id
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* @return T if found, null if not.
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*/
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public <T> T findByXid(Class<T> entityType, String xid);
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/**
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* Lists all entities. Use this method at your own risk.
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* @param <T> entity class
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* @param entityType type of entity you're looking for.
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* @return List<T>
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*/
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public <T> List<? extends T> list(Class<T> entityType);
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/**
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* Persists the entity.
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* @param <T> entity class
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* @param t entity
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* @return persisted entity. Only use this after persisting.
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*/
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public <T> T persist(T t);
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public <T> SearchBuilder<T> createSearchBuilder(Class<T> entityType);
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public <T, K> GenericSearchBuilder<T, K> createGenericSearchBuilder(Class<T> entityType, Class<K> resultType);
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public <T, K> List<K> search(Class<T> entityType, SearchCriteria<K> sc);
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public <T, K extends Serializable> void remove(Class<T> entityType, K id);
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}
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