/**
*
* Copyright (c) 2006-2017, Speedment, Inc. All Rights Reserved.
*
* 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.
*/
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package com.speedment.runtime.core.component.sql;
import com.speedment.runtime.core.db.DbmsType;
import com.speedment.runtime.core.internal.component.sql.SqlStreamOptimizerInfoImpl;
import com.speedment.runtime.field.Field;
import java.util.List;
import java.util.function.BiFunction;
import java.util.function.Function;
/**
*
* @author Per Minborg
* @param <ENTITY> the entity type
*/
public interface SqlStreamOptimizerInfo<ENTITY> {
/**
* Returns the DbmsType.
*
* @return the DbmsType
*/
DbmsType getDbmsType();
/**
* Returns the SQL select statement.
* <p>
* The initial value is "SELECT " + sqlColumnList + " FROM " +
* sqlTableReference;
*
* @return the SQL select statement
*/
String getSqlSelect();
/**
* Returns the SQL select count statement.
* <p>
* "SELECT COUNT(*) FROM " + sqlTableReference;
*
* @return the SQL select count statement
*/
String getSqlSelectCount();
/**
* Returns a BiFunction that will read in the count long value from the
* database.
* <p>
* E.g. getCounter.apply("select count(*) from user", emptyList()))
*
* @return a BiFunction that will read in the count long value from the
* database
*/
BiFunction<String, List<Object>, Long> getCounter();
/**
* Returns a Function that will map a Field to a column name.
*
* @return a Function that will map a Field to a column name
*/
Function<Field<ENTITY>, String> getSqlColumnNamer();
/**
* Returns a Function that will map a Field to a column class type.
*
* @return a Function that will map a Field to a column class type
*/
Function<Field<ENTITY>, Class<?>> getSqlDatabaseTypeFunction();
static <ENTITY> SqlStreamOptimizerInfo<ENTITY> of(
final DbmsType dbmsType,
final String sqlSelect,
final String sqlSelectCount,
final BiFunction<String, List<Object>, Long> counter,
final Function<Field<ENTITY>, String> sqlColumnNamer,
final Function<Field<ENTITY>, Class<?>> sqlDatabaseTypeFunction
) {
return new SqlStreamOptimizerInfoImpl<>(
dbmsType,
sqlSelect,
sqlSelectCount,
counter,
sqlColumnNamer,
sqlDatabaseTypeFunction
);
}
}