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* and open the template in the editor.
*/
package org.fryske_akademy.ejb;
/*-
* #%L
* ejbCrudApi
* %%
* Copyright (C) 2018 Fryske Akademy
* %%
* Licensed 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.
* #L%
*/
import org.fryske_akademy.jpa.Param;
import java.io.Serializable;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* Generic interface for read operations on entities.
*
* @see SORTORDER
* @see Param
* @author eduard
*/
public interface CrudReadService extends Serializable {
public enum SORTORDER implements Serializable {
DESC, ASC, NONE;
public static Map order(String key, SORTORDER order) {
return new Builder().add(key, order).build();
}
public static class Builder {
private final Map sort = new HashMap<>(2);
public Builder add(String key, SORTORDER o) {
sort.put(key, o);
return this;
}
public Map build() {
return sort;
}
}
}
/**
* Return a default page size when no max is given, negative value means no limit
*
* @return
*/
public int getDefaultPageSize();
public T find(Serializable id, Class type);
public List findAll(Class type);
/**
*
* @param
* @param first defaults to 0
* @param pageSize defaults to {@link #getDefaultPageSize() }
* @param sort
* @param params
* @param type
* @return
*/
public List findDynamic(Integer first, Integer pageSize, Map sort, List params, Class type);
/**
* Call this using the same parameters as in findDynamic to get to know the total number of results
* @param params
* @param type
* @return
*/
public int countDynamic(List params, Class type);
/**
*
* @param
* @param namedQuery
* @param params
* @param first defaults to 0
* @param pageSize defaults to {@link #getDefaultPageSize() }
* @param type
* @return
*/
public List find(String namedQuery, List params, Integer first, Integer max, Class type);
/**
*
* @param
* @param namedNativeQuery
* @param params
* @param first defaults to 0
* @param pageSize defaults to {@link #getDefaultPageSize() }
* @param type
* @return
*/
public List findNative(String namedNativeQuery, List params, Integer first, Integer max, Class type);
/**
* Call this using the same parameters as in {@link #find(java.lang.String, java.util.List, java.lang.Integer, java.lang.Integer, java.lang.Class) }
* to get to know the total number of results
*
* @param namedQuery
* @param params
* @return
*/
public int count(String namedQuery, List params);
/**
* return one result or null, multiple results throws an exception
*
* @param
* @param namedQuery
* @param params
* @param type
* @return
*/
public T findOne(String namedQuery, List params, Class type);
}
