/**
 *
 * 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.
 */
package com.speedment.runtime.core.internal.component.sql;

import com.speedment.runtime.config.Column;
import com.speedment.runtime.config.Project;
import com.speedment.runtime.core.component.sql.SqlTypeMapperHelper;
import com.speedment.runtime.field.Field;
import com.speedment.runtime.typemapper.TypeMapper;

import static com.speedment.runtime.config.util.DocumentDbUtil.referencedColumn;

/**
 * Default implementation of the {@link SqlTypeMapperHelper}-interface.
 * 
 * @param <ENTITY>     the entity type
 * @param <DB_TYPE>    the JDBC type of the field
 * @param <JAVA_TYPE>  the java type of the field
 * 
 * @author  Emil Forslund
 * @since   3.0.1
 */
public final class SqlTypeMapperHelperImpl<ENTITY, DB_TYPE, JAVA_TYPE> 
implements SqlTypeMapperHelper<DB_TYPE, JAVA_TYPE> {

    private final TypeMapper<DB_TYPE, JAVA_TYPE> typeMapper;
    private final Column column;
    private final Class<ENTITY> entityClass;

    public SqlTypeMapperHelperImpl(
            Project project,
            Field<ENTITY> field,
            Class<ENTITY> entityClass) {

        @SuppressWarnings("unchecked")
        final TypeMapper<DB_TYPE, JAVA_TYPE> casted = 
            (TypeMapper<DB_TYPE, JAVA_TYPE>) field.typeMapper();
        
        this.typeMapper  = casted;
        this.column      = referencedColumn(project, field.identifier());
        this.entityClass = entityClass;
    }

    @Override
    public JAVA_TYPE apply(DB_TYPE dbValue) {
        return typeMapper.toJavaType(column, entityClass, dbValue);
    }
}